1 files changed, 1658 insertions, 1658 deletions

diff --git a/libraries/irrlicht-1.8/source/Irrlicht/CGUIEnvironment.cpp b/libraries/irrlicht-1.8/source/Irrlicht/CGUIEnvironment.cpp
index bf3fa86..aad2d19 100644
--- a/libraries/irrlicht-1.8/source/Irrlicht/CGUIEnvironment.cpp
+++ b/libraries/irrlicht-1.8/source/Irrlicht/CGUIEnvironment.cpp
@@ -1,1658 +1,1658 @@
-

-// Copyright (C) 2002-2012 Nikolaus Gebhardt

-// This file is part of the "Irrlicht Engine".

-// For conditions of distribution and use, see copyright notice in irrlicht.h

-

-#include "CGUIEnvironment.h"

-

-#ifdef _IRR_COMPILE_WITH_GUI_

-

-#include "IVideoDriver.h"

-

-#include "CGUISkin.h"

-#include "CGUIButton.h"

-#include "CGUIWindow.h"

-#include "CGUIScrollBar.h"

-#include "CGUIFont.h"

-#include "CGUISpriteBank.h"

-#include "CGUIImage.h"

-#include "CGUIMeshViewer.h"

-#include "CGUICheckBox.h"

-#include "CGUIListBox.h"

-#include "CGUITreeView.h"

-#include "CGUIImageList.h"

-#include "CGUIFileOpenDialog.h"

-#include "CGUIColorSelectDialog.h"

-#include "CGUIStaticText.h"

-#include "CGUIEditBox.h"

-#include "CGUISpinBox.h"

-#include "CGUIInOutFader.h"

-#include "CGUIMessageBox.h"

-#include "CGUIModalScreen.h"

-#include "CGUITabControl.h"

-#include "CGUIContextMenu.h"

-#include "CGUIComboBox.h"

-#include "CGUIMenu.h"

-#include "CGUIToolBar.h"

-#include "CGUITable.h"

-

-#include "CDefaultGUIElementFactory.h"

-#include "IWriteFile.h"

-#include "IXMLWriter.h"

-

-#include "BuiltInFont.h"

-#include "os.h"

-

-namespace irr

-{

-namespace gui

-{

-

-const wchar_t* IRR_XML_FORMAT_GUI_ENV                   = L"irr_gui";

-const wchar_t* IRR_XML_FORMAT_GUI_ELEMENT               = L"element";

-const wchar_t* IRR_XML_FORMAT_GUI_ELEMENT_ATTR_TYPE     = L"type";

-

-const io::path CGUIEnvironment::DefaultFontName = "#DefaultFont";

-

-//! constructor

-CGUIEnvironment::CGUIEnvironment(io::IFileSystem* fs, video::IVideoDriver* driver, IOSOperator* op)

-: IGUIElement(EGUIET_ROOT, 0, 0, 0, core::rect<s32>(core::position2d<s32>(0,0), driver ? core::dimension2d<s32>(driver->getScreenSize()) : core::dimension2d<s32>(0,0))),

-        Driver(driver), Hovered(0), HoveredNoSubelement(0), Focus(0), LastHoveredMousePos(0,0), CurrentSkin(0),

-        FileSystem(fs), UserReceiver(0), Operator(op)

-{

-        if (Driver)

-                Driver->grab();

-

-        if (FileSystem)

-                FileSystem->grab();

-

-        if (Operator)

-                Operator->grab();

-

-        #ifdef _DEBUG

-        IGUIEnvironment::setDebugName("CGUIEnvironment");

-        #endif

-

-        // gui factory

-        IGUIElementFactory* factory = new CDefaultGUIElementFactory(this);

-        registerGUIElementFactory(factory);

-        factory->drop();

-

-        loadBuiltInFont();

-

-        IGUISkin* skin = createSkin( gui::EGST_WINDOWS_METALLIC );

-        setSkin(skin);

-        skin->drop();

-

-        //set tooltip default

-        ToolTip.LastTime = 0;

-        ToolTip.EnterTime = 0;

-        ToolTip.LaunchTime = 1000;

-        ToolTip.RelaunchTime = 500;

-        ToolTip.Element = 0;

-

-        // environment is root tab group

-        Environment = this;

-        setTabGroup(true);

-}

-

-

-//! destructor

-CGUIEnvironment::~CGUIEnvironment()

-{

-        if ( HoveredNoSubelement && HoveredNoSubelement != this )

-        {

-                HoveredNoSubelement->drop();

-                HoveredNoSubelement = 0;

-        }

-

-        if (Hovered && Hovered != this)

-        {

-                Hovered->drop();

-                Hovered = 0;

-        }

-

-        if (Focus)

-        {

-                Focus->drop();

-                Focus = 0;

-        }

-

-        if (ToolTip.Element)

-        {

-                ToolTip.Element->drop();

-                ToolTip.Element = 0;

-        }

-

-        // drop skin

-        if (CurrentSkin)

-        {

-                CurrentSkin->drop();

-                CurrentSkin = 0;

-        }

-

-        u32 i;

-

-        // delete all sprite banks

-        for (i=0; i<Banks.size(); ++i)

-                if (Banks[i].Bank)

-                        Banks[i].Bank->drop();

-

-        // delete all fonts

-        for (i=0; i<Fonts.size(); ++i)

-                Fonts[i].Font->drop();

-

-        // remove all factories

-        for (i=0; i<GUIElementFactoryList.size(); ++i)

-                GUIElementFactoryList[i]->drop();

-

-        if (Operator)

-        {

-                Operator->drop();

-                Operator = 0;

-        }

-

-        if (FileSystem)

-        {

-                FileSystem->drop();

-                FileSystem = 0;

-        }

-

-        if (Driver)

-        {

-                Driver->drop();

-                Driver = 0;

-        }

-}

-

-

-void CGUIEnvironment::loadBuiltInFont()

-{

-        io::IReadFile* file = io::createMemoryReadFile(BuiltInFontData, BuiltInFontDataSize, DefaultFontName, false);

-

-        CGUIFont* font = new CGUIFont(this, DefaultFontName );

-        if (!font->load(file))

-        {

-                os::Printer::log("Error: Could not load built-in Font. Did you compile without the BMP loader?", ELL_ERROR);

-                font->drop();

-                file->drop();

-                return;

-        }

-

-        SFont f;

-        f.NamedPath.setPath(DefaultFontName);

-        f.Font = font;

-        Fonts.push_back(f);

-

-        file->drop();

-}

-

-

-//! draws all gui elements

-void CGUIEnvironment::drawAll()

-{

-        if (Driver)

-        {

-                core::dimension2d<s32> dim(Driver->getScreenSize());

-                if (AbsoluteRect.LowerRightCorner.X != dim.Width ||

-                        AbsoluteRect.LowerRightCorner.Y != dim.Height)

-                {

-                        // resize gui environment

-                        DesiredRect.LowerRightCorner = dim;

-                        AbsoluteClippingRect = DesiredRect;

-                        AbsoluteRect = DesiredRect;

-                        updateAbsolutePosition();

-                }

-        }

-

-        // make sure tooltip is always on top

-        if (ToolTip.Element)

-                bringToFront(ToolTip.Element);

-

-        draw();

-        OnPostRender ( os::Timer::getTime () );

-}

-

-

-//! sets the focus to an element

-bool CGUIEnvironment::setFocus(IGUIElement* element)

-{

-        if (Focus == element)

-        {

-                _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-                return false;

-        }

-

-        // GUI Environment should not get the focus

-        if (element == this)

-                element = 0;

-

-        // stop element from being deleted

-        if (element)

-                element->grab();

-

-        // focus may change or be removed in this call

-        IGUIElement *currentFocus = 0;

-        if (Focus)

-        {

-                currentFocus = Focus;

-                currentFocus->grab();

-                SEvent e;

-                e.EventType = EET_GUI_EVENT;

-                e.GUIEvent.Caller = Focus;

-                e.GUIEvent.Element = element;

-                e.GUIEvent.EventType = EGET_ELEMENT_FOCUS_LOST;

-                if (Focus->OnEvent(e))

-                {

-                        if (element)

-                                element->drop();

-                        currentFocus->drop();

-                        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-                        return false;

-                }

-                currentFocus->drop();

-                currentFocus = 0;

-        }

-

-        if (element)

-        {

-                currentFocus = Focus;

-                if (currentFocus)

-                        currentFocus->grab();

-

-                // send focused event

-                SEvent e;

-                e.EventType = EET_GUI_EVENT;

-                e.GUIEvent.Caller = element;

-                e.GUIEvent.Element = Focus;

-                e.GUIEvent.EventType = EGET_ELEMENT_FOCUSED;

-                if (element->OnEvent(e))

-                {

-                        if (element)

-                                element->drop();

-                        if (currentFocus)

-                                currentFocus->drop();

-                        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-                        return false;

-                }

-        }

-

-        if (currentFocus)

-                currentFocus->drop();

-

-        if (Focus)

-                Focus->drop();

-

-        // element is the new focus so it doesn't have to be dropped

-        Focus = element;

-

-        return true;

-}

-

-

-//! returns the element with the focus

-IGUIElement* CGUIEnvironment::getFocus() const

-{

-        return Focus;

-}

-

-//! returns the element last known to be under the mouse cursor

-IGUIElement* CGUIEnvironment::getHovered() const

-{

-        return Hovered;

-}

-

-

-//! removes the focus from an element

-bool CGUIEnvironment::removeFocus(IGUIElement* element)

-{

-        if (Focus && Focus==element)

-        {

-                SEvent e;

-                e.EventType = EET_GUI_EVENT;

-                e.GUIEvent.Caller = Focus;

-                e.GUIEvent.Element = 0;

-                e.GUIEvent.EventType = EGET_ELEMENT_FOCUS_LOST;

-                if (Focus->OnEvent(e))

-                {

-                        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-                        return false;

-                }

-        }

-        if (Focus)

-        {

-                Focus->drop();

-                Focus = 0;

-        }

-

-        return true;

-}

-

-

-//! Returns if the element has focus

-bool CGUIEnvironment::hasFocus(IGUIElement* element) const

-{

-        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-        return (element == Focus);

-}

-

-

-//! returns the current video driver

-video::IVideoDriver* CGUIEnvironment::getVideoDriver() const

-{

-        return Driver;

-}

-

-

-//! returns the current file system

-io::IFileSystem* CGUIEnvironment::getFileSystem() const

-{

-        return FileSystem;

-}

-

-

-//! returns a pointer to the OS operator

-IOSOperator* CGUIEnvironment::getOSOperator() const

-{

-        return Operator;

-}

-

-

-//! clear all GUI elements

-void CGUIEnvironment::clear()

-{

-        // Remove the focus

-        if (Focus)

-        {

-                Focus->drop();

-                Focus = 0;

-        }

-

-        if (Hovered && Hovered != this)

-        {

-                Hovered->drop();

-                Hovered = 0;

-        }

-        if ( HoveredNoSubelement && HoveredNoSubelement != this)

-        {

-                HoveredNoSubelement->drop();

-                HoveredNoSubelement = 0;

-        }

-

-        // get the root's children in case the root changes in future

-        const core::list<IGUIElement*>& children = getRootGUIElement()->getChildren();

-

-        while (!children.empty())

-                (*children.getLast())->remove();

-}

-

-

-//! called by ui if an event happened.

-bool CGUIEnvironment::OnEvent(const SEvent& event)

-{

-        bool ret = false;

-        if (UserReceiver

-                && (event.EventType != EET_MOUSE_INPUT_EVENT)

-                && (event.EventType != EET_KEY_INPUT_EVENT)

-                && (event.EventType != EET_GUI_EVENT || event.GUIEvent.Caller != this))

-        {

-                ret = UserReceiver->OnEvent(event);

-        }

-

-        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-        return ret;

-}

-

-//

-void CGUIEnvironment::OnPostRender( u32 time )

-{

-        // launch tooltip

-        if ( ToolTip.Element == 0 &&

-                HoveredNoSubelement && HoveredNoSubelement != this &&

-                (time - ToolTip.EnterTime >= ToolTip.LaunchTime

-                || (time - ToolTip.LastTime >= ToolTip.RelaunchTime && time - ToolTip.LastTime < ToolTip.LaunchTime)) &&

-                HoveredNoSubelement->getToolTipText().size() &&

-                getSkin() &&

-                getSkin()->getFont(EGDF_TOOLTIP)

-                )

-        {

-                core::rect<s32> pos;

-

-                pos.UpperLeftCorner = LastHoveredMousePos;

-                core::dimension2du dim = getSkin()->getFont(EGDF_TOOLTIP)->getDimension(HoveredNoSubelement->getToolTipText().c_str());

-                dim.Width += getSkin()->getSize(EGDS_TEXT_DISTANCE_X)*2;

-                dim.Height += getSkin()->getSize(EGDS_TEXT_DISTANCE_Y)*2;

-

-                pos.UpperLeftCorner.Y -= dim.Height+1;

-                pos.LowerRightCorner.Y = pos.UpperLeftCorner.Y + dim.Height-1;

-                pos.LowerRightCorner.X = pos.UpperLeftCorner.X + dim.Width;

-

-                pos.constrainTo(getAbsolutePosition());

-

-                ToolTip.Element = addStaticText(HoveredNoSubelement->getToolTipText().c_str(), pos, true, true, this, -1, true);

-                ToolTip.Element->setOverrideColor(getSkin()->getColor(EGDC_TOOLTIP));

-                ToolTip.Element->setBackgroundColor(getSkin()->getColor(EGDC_TOOLTIP_BACKGROUND));

-                ToolTip.Element->setOverrideFont(getSkin()->getFont(EGDF_TOOLTIP));

-                ToolTip.Element->setSubElement(true);

-                ToolTip.Element->grab();

-

-                s32 textHeight = ToolTip.Element->getTextHeight();

-                pos = ToolTip.Element->getRelativePosition();

-                pos.LowerRightCorner.Y = pos.UpperLeftCorner.Y + textHeight;

-                ToolTip.Element->setRelativePosition(pos);

-        }

-

-        if (ToolTip.Element && ToolTip.Element->isVisible() )   // (isVisible() check only because we might use visibility for ToolTip one day)

-        {

-                ToolTip.LastTime = time;

-

-                // got invisible or removed in the meantime?

-                if ( !HoveredNoSubelement ||

-                        !HoveredNoSubelement->isVisible() ||

-                        !HoveredNoSubelement->getParent()

-                        )       // got invisible or removed in the meantime?

-                {

-                        ToolTip.Element->remove();

-                        ToolTip.Element->drop();

-                        ToolTip.Element = 0;

-                }

-        }

-

-        IGUIElement::OnPostRender ( time );

-}

-

-

-//

-void CGUIEnvironment::updateHoveredElement(core::position2d<s32> mousePos)

-{

-        IGUIElement* lastHovered = Hovered;

-        IGUIElement* lastHoveredNoSubelement = HoveredNoSubelement;

-        LastHoveredMousePos = mousePos;

-

-        Hovered = getElementFromPoint(mousePos);

-

-        if ( ToolTip.Element && Hovered == ToolTip.Element )

-        {

-                // When the mouse is over the ToolTip we remove that so it will be re-created at a new position.

-                // Note that ToolTip.EnterTime does not get changed here, so it will be re-created at once.

-                ToolTip.Element->remove();

-                ToolTip.Element->drop();

-                ToolTip.Element = 0;

-

-                // Get the real Hovered

-                Hovered = getElementFromPoint(mousePos);

-        }

-

-        // for tooltips we want the element itself and not some of it's subelements

-        HoveredNoSubelement = Hovered;

-        while ( HoveredNoSubelement && HoveredNoSubelement->isSubElement() )

-        {

-                HoveredNoSubelement = HoveredNoSubelement->getParent();

-        }

-

-        if (Hovered && Hovered != this)

-                Hovered->grab();

-        if ( HoveredNoSubelement && HoveredNoSubelement != this)

-                HoveredNoSubelement->grab();

-

-        if (Hovered != lastHovered)

-        {

-                SEvent event;

-                event.EventType = EET_GUI_EVENT;

-

-                if (lastHovered)

-                {

-                        event.GUIEvent.Caller = lastHovered;

-                        event.GUIEvent.Element = 0;

-                        event.GUIEvent.EventType = EGET_ELEMENT_LEFT;

-                        lastHovered->OnEvent(event);

-                }

-

-                if ( Hovered )

-                {

-                        event.GUIEvent.Caller  = Hovered;

-                        event.GUIEvent.Element = Hovered;

-                        event.GUIEvent.EventType = EGET_ELEMENT_HOVERED;

-                        Hovered->OnEvent(event);

-                }

-        }

-

-        if ( lastHoveredNoSubelement != HoveredNoSubelement )

-        {

-                if (ToolTip.Element)

-                {

-                        ToolTip.Element->remove();

-                        ToolTip.Element->drop();

-                        ToolTip.Element = 0;

-                }

-

-                if ( HoveredNoSubelement )

-                {

-                        u32 now = os::Timer::getTime();

-                        ToolTip.EnterTime = now;

-                }

-        }

-

-        if (lastHovered && lastHovered != this)

-                lastHovered->drop();

-        if (lastHoveredNoSubelement && lastHoveredNoSubelement != this)

-                lastHoveredNoSubelement->drop();

-}

-

-

-//! This sets a new event receiver for gui events. Usually you do not have to

-//! use this method, it is used by the internal engine.

-void CGUIEnvironment::setUserEventReceiver(IEventReceiver* evr)

-{

-        UserReceiver = evr;

-}

-

-

-//! posts an input event to the environment

-bool CGUIEnvironment::postEventFromUser(const SEvent& event)

-{

-        switch(event.EventType)

-        {

-        case EET_GUI_EVENT:

-                // hey, why is the user sending gui events..?

-                break;

-        case EET_MOUSE_INPUT_EVENT:

-

-                updateHoveredElement(core::position2d<s32>(event.MouseInput.X, event.MouseInput.Y));

-

-                if (event.MouseInput.Event == EMIE_LMOUSE_PRESSED_DOWN)

-                        if ( (Hovered && Hovered != Focus) || !Focus )

-                {

-                        setFocus(Hovered);

-                }

-

-                // sending input to focus

-                if (Focus && Focus->OnEvent(event))

-                        return true;

-

-                // focus could have died in last call

-                if (!Focus && Hovered)

-                {

-                        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-                        return Hovered->OnEvent(event);

-                }

-

-                break;

-        case EET_KEY_INPUT_EVENT:

-                {

-                        if (Focus && Focus->OnEvent(event))

-                                return true;

-

-                        // For keys we handle the event before changing focus to give elements the chance for catching the TAB

-                        // Send focus changing event

-                        if (event.EventType == EET_KEY_INPUT_EVENT &&

-                                event.KeyInput.PressedDown &&

-                                event.KeyInput.Key == KEY_TAB)

-                        {

-                                IGUIElement *next = getNextElement(event.KeyInput.Shift, event.KeyInput.Control);

-                                if (next && next != Focus)

-                                {

-                                        if (setFocus(next))

-                                                return true;

-                                }

-                        }

-

-                }

-                break;

-        default:

-                break;

-        } // end switch

-

-        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-        return false;

-}

-

-

-//! returns the current gui skin

-IGUISkin* CGUIEnvironment::getSkin() const

-{

-        return CurrentSkin;

-}

-

-

-//! Sets a new GUI Skin

-void CGUIEnvironment::setSkin(IGUISkin* skin)

-{

-        if (CurrentSkin==skin)

-                return;

-

-        if (CurrentSkin)

-                CurrentSkin->drop();

-

-        CurrentSkin = skin;

-

-        if (CurrentSkin)

-                CurrentSkin->grab();

-}

-

-

-//! Creates a new GUI Skin based on a template.

-/** \return Returns a pointer to the created skin.

-If you no longer need the skin, you should call IGUISkin::drop().

-See IReferenceCounted::drop() for more information. */

-IGUISkin* CGUIEnvironment::createSkin(EGUI_SKIN_TYPE type)

-{

-        IGUISkin* skin = new CGUISkin(type, Driver);

-

-        IGUIFont* builtinfont = getBuiltInFont();

-        IGUIFontBitmap* bitfont = 0;

-        if (builtinfont && builtinfont->getType() == EGFT_BITMAP)

-                bitfont = (IGUIFontBitmap*)builtinfont;

-

-        IGUISpriteBank* bank = 0;

-        skin->setFont(builtinfont);

-

-        if (bitfont)

-                bank = bitfont->getSpriteBank();

-

-        skin->setSpriteBank(bank);

-

-        return skin;

-}

-

-

-//! Returns the default element factory which can create all built in elements

-IGUIElementFactory* CGUIEnvironment::getDefaultGUIElementFactory() const

-{

-        return getGUIElementFactory(0);

-}

-

-

-//! Adds an element factory to the gui environment.

-/** Use this to extend the gui environment with new element types which it should be

-able to create automaticly, for example when loading data from xml files. */

-void CGUIEnvironment::registerGUIElementFactory(IGUIElementFactory* factoryToAdd)

-{

-        if (factoryToAdd)

-        {

-                factoryToAdd->grab();

-                GUIElementFactoryList.push_back(factoryToAdd);

-        }

-}

-

-

-//! Returns amount of registered scene node factories.

-u32 CGUIEnvironment::getRegisteredGUIElementFactoryCount() const

-{

-        return GUIElementFactoryList.size();

-}

-

-

-//! Returns a scene node factory by index

-IGUIElementFactory* CGUIEnvironment::getGUIElementFactory(u32 index) const

-{

-        if (index < GUIElementFactoryList.size())

-                return GUIElementFactoryList[index];

-        else

-                return 0;

-}

-

-

-//! adds a GUI Element using its name

-IGUIElement* CGUIEnvironment::addGUIElement(const c8* elementName, IGUIElement* parent)

-{

-        IGUIElement* node=0;

-

-        if (!parent)

-                parent = this;

-

-        for (s32 i=GUIElementFactoryList.size()-1; i>=0 && !node; --i)

-                node = GUIElementFactoryList[i]->addGUIElement(elementName, parent);

-

-

-        return node;

-}

-

-

-//! Saves the current gui into a file.

-//! \param filename: Name of the file .

-bool CGUIEnvironment::saveGUI(const io::path& filename, IGUIElement* start)

-{

-        io::IWriteFile* file = FileSystem->createAndWriteFile(filename);

-        if (!file)

-        {

-                _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-                return false;

-        }

-

-        bool ret = saveGUI(file, start);

-        file->drop();

-        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-        return ret;

-}

-

-

-//! Saves the current gui into a file.

-bool CGUIEnvironment::saveGUI(io::IWriteFile* file, IGUIElement* start)

-{

-        if (!file)

-        {

-                _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-                return false;

-        }

-

-        io::IXMLWriter* writer = FileSystem->createXMLWriter(file);

-        if (!writer)

-        {

-                _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-                return false;

-        }

-

-        writer->writeXMLHeader();

-        writeGUIElement(writer, start ? start : this);

-        writer->drop();

-

-        return true;

-}

-

-

-//! Loads the gui. Note that the current gui is not cleared before.

-//! \param filename: Name of the file.

-bool CGUIEnvironment::loadGUI(const io::path& filename, IGUIElement* parent)

-{

-        io::IReadFile* read = FileSystem->createAndOpenFile(filename);

-        if (!read)

-        {

-                os::Printer::log("Unable to open gui file", filename, ELL_ERROR);

-                _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-                return false;

-        }

-

-        bool ret = loadGUI(read, parent);

-        read->drop();

-

-        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-        return ret;

-}

-

-

-//! Loads the gui. Note that the current gui is not cleared before.

-bool CGUIEnvironment::loadGUI(io::IReadFile* file, IGUIElement* parent)

-{

-        if (!file)

-        {

-                os::Printer::log("Unable to open GUI file", ELL_ERROR);

-                _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-                return false;

-        }

-

-        io::IXMLReader* reader = FileSystem->createXMLReader(file);

-        if (!reader)

-        {

-                os::Printer::log("GUI is not a valid XML file", file->getFileName(), ELL_ERROR);

-                _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;

-                return false;

-        }

-

-        // read file

-        while(reader->read())

-        {

-                readGUIElement(reader, parent);

-        }

-

-        // finish up

-

-        reader->drop();

-        return true;

-}

-

-

-//! reads an element

-void CGUIEnvironment::readGUIElement(io::IXMLReader* reader, IGUIElement* node)

-{

-        if (!reader)

-                return;

-

-        io::EXML_NODE nodeType = reader->getNodeType();

-

-        if (nodeType == io::EXN_NONE || nodeType == io::EXN_UNKNOWN || nodeType == io::EXN_ELEMENT_END)

-                return;

-

-        IGUIElement* deferedNode = 0;

-        if (!wcscmp(IRR_XML_FORMAT_GUI_ENV, reader->getNodeName()))

-        {

-                // GuiEnvironment always must be this as it would serialize into a wrong element otherwise.

-                // So we use the given node next time

-                if ( node && node != this )

-                        deferedNode = node;

-                node = this; // root

-        }

-        else if (!wcscmp(IRR_XML_FORMAT_GUI_ELEMENT, reader->getNodeName()))

-        {

-                // find node type and create it

-                const core::stringc attrName = reader->getAttributeValue(IRR_XML_FORMAT_GUI_ELEMENT_ATTR_TYPE);

-

-                node = addGUIElement(attrName.c_str(), node);

-

-                if (!node)

-                        os::Printer::log("Could not create GUI element of unknown type", attrName.c_str());

-        }

-

-        // read attributes

-

-        while(reader->read())

-        {

-                bool endreached = false;

-

-                switch (reader->getNodeType())

-                {

-                case io::EXN_ELEMENT_END:

-                        if (!wcscmp(IRR_XML_FORMAT_GUI_ELEMENT,  reader->getNodeName()) ||

-                                !wcscmp(IRR_XML_FORMAT_GUI_ENV, reader->getNodeName()))

-                        {

-                                endreached = true;

-                        }

-                        break;

-                case io::EXN_ELEMENT:

-                        if (!wcscmp(L"attributes", reader->getNodeName()))

-                        {

-                                // read attributes

-                                io::IAttributes* attr = FileSystem->createEmptyAttributes(Driver);

-                                attr->read(reader, true);

-

-                                if (node)

-                                        node->deserializeAttributes(attr);

-

-                                attr->drop();

-                        }

-                        else

-                        if (!wcscmp(IRR_XML_FORMAT_GUI_ELEMENT, reader->getNodeName()) ||

-                                !wcscmp(IRR_XML_FORMAT_GUI_ENV, reader->getNodeName()))

-                        {

-                                if ( deferedNode )

-                                        readGUIElement(reader, deferedNode);

-                                else

-                                        readGUIElement(reader, node);

-                        }

-                        else

-                        {

-                                os::Printer::log("Found unknown element in irrlicht GUI file",

-                                                core::stringc(reader->getNodeName()).c_str());

-                        }

-

-                        break;

-                default:

-                        break;

-                }

-

-                if (endreached)

-                        break;

-        }

-}

-

-

-//! writes an element

-void CGUIEnvironment::writeGUIElement(io::IXMLWriter* writer, IGUIElement* node)

-{

-        if (!writer || !node )

-                return;

-

-        const wchar_t* name = 0;

-

-        // write properties

-

-        io::IAttributes* attr = FileSystem->createEmptyAttributes();

-        node->serializeAttributes(attr);

-

-        // all gui elements must have at least one attribute

-        // if they have nothing then we ignore them.

-        if (attr->getAttributeCount() != 0)

-        {

-                if (node == this)

-                {

-                        name = IRR_XML_FORMAT_GUI_ENV;

-                        writer->writeElement(name, false);

-                }

-                else

-                {

-                        name = IRR_XML_FORMAT_GUI_ELEMENT;

-                        writer->writeElement(name, false, IRR_XML_FORMAT_GUI_ELEMENT_ATTR_TYPE,

-                                core::stringw(node->getTypeName()).c_str());

-                }

-

-                writer->writeLineBreak();

-                writer->writeLineBreak();

-

-                attr->write(writer);

-                writer->writeLineBreak();

-        }

-

-        // write children

-

-        core::list<IGUIElement*>::ConstIterator it = node->getChildren().begin();

-        for (; it != node->getChildren().end(); ++it)

-        {

-                if (!(*it)->isSubElement())

-                        writeGUIElement(writer, (*it));

-        }

-

-        // write closing brace if required

-        if (attr->getAttributeCount() != 0)

-        {

-                writer->writeClosingTag(name);

-                writer->writeLineBreak();

-                writer->writeLineBreak();

-        }

-

-        attr->drop();

-}

-

-

-//! Writes attributes of the environment

-void CGUIEnvironment::serializeAttributes(io::IAttributes* out, io::SAttributeReadWriteOptions* options) const

-{

-        IGUISkin* skin = getSkin();

-

-        if (skin)

-        {

-                out->addEnum("Skin", getSkin()->getType(), GUISkinTypeNames);

-                skin->serializeAttributes(out, options);

-        }

-}

-

-

-//! Reads attributes of the environment

-void CGUIEnvironment::deserializeAttributes(io::IAttributes* in, io::SAttributeReadWriteOptions* options)

-{

-        if (in->existsAttribute("Skin"))

-        {

-                IGUISkin *skin = getSkin();

-

-                EGUI_SKIN_TYPE t = (EGUI_SKIN_TYPE) in->getAttributeAsEnumeration("Skin",GUISkinTypeNames);

-                if ( !skin || t != skin->getType())

-                {

-                        skin = createSkin(t);

-                        setSkin(skin);

-                        skin->drop();

-                }

-

-                skin = getSkin();

-

-                if (skin)

-                {

-                        skin->deserializeAttributes(in, options);

-                }

-

-        }

-

-        RelativeRect = AbsoluteRect =

-                        core::rect<s32>(core::position2d<s32>(0,0),

-                        Driver ? core::dimension2di(Driver->getScreenSize()) : core::dimension2d<s32>(0,0));

-}

-

-

-//! adds a button. The returned pointer must not be dropped.

-IGUIButton* CGUIEnvironment::addButton(const core::rect<s32>& rectangle, IGUIElement* parent, s32 id, const wchar_t* text, const wchar_t *tooltiptext)

-{

-        IGUIButton* button = new CGUIButton(this, parent ? parent : this, id, rectangle);

-        if (text)

-                button->setText(text);

-

-        if ( tooltiptext )

-                button->setToolTipText ( tooltiptext );

-

-        button->drop();

-        return button;

-}

-

-

-//! adds a window. The returned pointer must not be dropped.

-IGUIWindow* CGUIEnvironment::addWindow(const core::rect<s32>& rectangle, bool modal,

-                const wchar_t* text, IGUIElement* parent, s32 id)

-{

-        parent = parent ? parent : this;

-

-        IGUIWindow* win = new CGUIWindow(this, parent, id, rectangle);

-        if (text)

-                win->setText(text);

-        win->drop();

-

-        if (modal)

-        {

-                // Careful, don't just set the modal as parent above. That will mess up the focus (and is hard to change because we have to be very

-                // careful not to get virtual function call, like OnEvent, in the window.

-                CGUIModalScreen * modalScreen = new CGUIModalScreen(this, parent, -1);

-                modalScreen->drop();

-                modalScreen->addChild(win);

-        }

-

-        return win;

-}

-

-

-//! adds a modal screen. The returned pointer must not be dropped.

-IGUIElement* CGUIEnvironment::addModalScreen(IGUIElement* parent)

-{

-        parent = parent ? parent : this;

-

-        IGUIElement *win = new CGUIModalScreen(this, parent, -1);

-        win->drop();

-

-        return win;

-}

-

-

-//! Adds a message box.

-IGUIWindow* CGUIEnvironment::addMessageBox(const wchar_t* caption, const wchar_t* text,

-        bool modal, s32 flag, IGUIElement* parent, s32 id, video::ITexture* image)

-{

-        if (!CurrentSkin)

-                return 0;

-

-        parent = parent ? parent : this;

-

-        core::rect<s32> rect;

-        core::dimension2d<u32> screenDim, msgBoxDim;

-

-        screenDim.Width = parent->getAbsolutePosition().getWidth();

-        screenDim.Height = parent->getAbsolutePosition().getHeight();

-        msgBoxDim.Width = 2;

-        msgBoxDim.Height = 2;

-

-        rect.UpperLeftCorner.X = (screenDim.Width - msgBoxDim.Width) / 2;

-        rect.UpperLeftCorner.Y = (screenDim.Height - msgBoxDim.Height) / 2;

-        rect.LowerRightCorner.X = rect.UpperLeftCorner.X + msgBoxDim.Width;

-        rect.LowerRightCorner.Y = rect.UpperLeftCorner.Y + msgBoxDim.Height;

-

-        IGUIWindow* win = new CGUIMessageBox(this, caption, text, flag,

-                parent, id, rect, image);

-        win->drop();

-

-        if (modal)

-        {

-                // Careful, don't just set the modal as parent above. That will mess up the focus (and is hard to change because we have to be very

-                // careful not to get virtual function call, like OnEvent, in the CGUIMessageBox.

-                CGUIModalScreen * modalScreen = new CGUIModalScreen(this, parent, -1);

-                modalScreen->drop();

-                modalScreen->addChild( win );

-        }

-

-

-        return win;

-}

-

-

-//! adds a scrollbar. The returned pointer must not be dropped.

-IGUIScrollBar* CGUIEnvironment::addScrollBar(bool horizontal, const core::rect<s32>& rectangle, IGUIElement* parent, s32 id)

-{

-        IGUIScrollBar* bar = new CGUIScrollBar(horizontal, this, parent ? parent : this, id, rectangle);

-        bar->drop();

-        return bar;

-}

-

-//! Adds a table to the environment

-IGUITable* CGUIEnvironment::addTable(const core::rect<s32>& rectangle, IGUIElement* parent, s32 id, bool drawBackground)

-{

-        CGUITable* b = new CGUITable(this, parent ? parent : this, id, rectangle, true, drawBackground, false);

-        b->drop();

-        return b;

-}

-

-

-//! Adds an image element.

-IGUIImage* CGUIEnvironment::addImage(video::ITexture* image, core::position2d<s32> pos,

-        bool useAlphaChannel, IGUIElement* parent, s32 id, const wchar_t* text)

-{

-        core::dimension2d<s32> sz(0,0);

-        if (image)

-                sz = core::dimension2d<s32>(image->getOriginalSize());

-

-        IGUIImage* img = new CGUIImage(this, parent ? parent : this,

-                id, core::rect<s32>(pos, sz));

-

-        if (text)

-                img->setText(text);

-

-        if (useAlphaChannel)

-                img->setUseAlphaChannel(true);

-

-        if (image)

-                img->setImage(image);

-

-        img->drop();

-        return img;

-}

-

-

-//! adds an image. The returned pointer must not be dropped.

-IGUIImage* CGUIEnvironment::addImage(const core::rect<s32>& rectangle, IGUIElement* parent, s32 id, const wchar_t* text, bool useAlphaChannel)

-{

-        IGUIImage* img = new CGUIImage(this, parent ? parent : this,

-                id, rectangle);

-

-        if (text)

-                img->setText(text);

-

-        if ( useAlphaChannel )

-                img->setUseAlphaChannel(true);

-

-        img->drop();

-        return img;

-}

-

-

-//! adds an mesh viewer. The returned pointer must not be dropped.

-IGUIMeshViewer* CGUIEnvironment::addMeshViewer(const core::rect<s32>& rectangle, IGUIElement* parent, s32 id, const wchar_t* text)

-{

-        IGUIMeshViewer* v = new CGUIMeshViewer(this, parent ? parent : this,

-                id, rectangle);

-

-        if (text)

-                v->setText(text);

-

-        v->drop();

-        return v;

-}

-

-

-//! adds a checkbox

-IGUICheckBox* CGUIEnvironment::addCheckBox(bool checked, const core::rect<s32>& rectangle, IGUIElement* parent, s32 id, const wchar_t* text)

-{

-        IGUICheckBox* b = new CGUICheckBox(checked, this,

-                parent ? parent : this , id , rectangle);

-

-        if (text)

-                b->setText(text);

-

-        b->drop();

-        return b;

-}

-

-

-//! adds a list box

-IGUIListBox* CGUIEnvironment::addListBox(const core::rect<s32>& rectangle,

-                                        IGUIElement* parent, s32 id, bool drawBackground)

-{

-        IGUIListBox* b = new CGUIListBox(this, parent ? parent : this, id, rectangle,

-                true, drawBackground, false);

-

-        if (CurrentSkin && CurrentSkin->getSpriteBank())

-        {

-                b->setSpriteBank(CurrentSkin->getSpriteBank());

-        }

-        else if (getBuiltInFont() && getBuiltInFont()->getType() == EGFT_BITMAP)

-        {

-                b->setSpriteBank( ((IGUIFontBitmap*)getBuiltInFont())->getSpriteBank());

-        }

-

-        b->drop();

-        return b;

-}

-

-//! adds a tree view

-IGUITreeView* CGUIEnvironment::addTreeView(const core::rect<s32>& rectangle,

-                                         IGUIElement* parent, s32 id,

-                                         bool drawBackground,

-                                         bool scrollBarVertical, bool scrollBarHorizontal)

-{

-        IGUITreeView* b = new CGUITreeView(this, parent ? parent : this, id, rectangle,

-                true, drawBackground, scrollBarVertical, scrollBarHorizontal);

-

-        b->setIconFont ( getBuiltInFont () );

-        b->drop();

-        return b;

-}

-

-//! adds a file open dialog. The returned pointer must not be dropped.

-IGUIFileOpenDialog* CGUIEnvironment::addFileOpenDialog(const wchar_t* title,

-                                bool modal, IGUIElement* parent, s32 id,

-                                bool restoreCWD, io::path::char_type* startDir)

-{

-        parent = parent ? parent : this;

-

-        IGUIFileOpenDialog* d = new CGUIFileOpenDialog(title, this, parent, id,

-                        restoreCWD, startDir);

-        d->drop();

-

-        if (modal)

-        {

-                // Careful, don't just set the modal as parent above. That will mess up the focus (and is hard to change because we have to be very

-                // careful not to get virtual function call, like OnEvent, in the window.

-                CGUIModalScreen * modalScreen = new CGUIModalScreen(this, parent, -1);

-                modalScreen->drop();

-                modalScreen->addChild(d);

-        }

-

-        return d;

-}

-

-

-//! adds a color select dialog. The returned pointer must not be dropped.

-IGUIColorSelectDialog* CGUIEnvironment::addColorSelectDialog(const wchar_t* title,

-                                bool modal, IGUIElement* parent, s32 id)

-{

-        parent = parent ? parent : this;

-

-        IGUIColorSelectDialog* d = new CGUIColorSelectDialog( title,

-                        this, parent, id);

-        d->drop();

-

-        if (modal)

-        {

-                // Careful, don't just set the modal as parent above. That will mess up the focus (and is hard to change because we have to be very

-                // careful not to get virtual function call, like OnEvent, in the window.

-                CGUIModalScreen * modalScreen = new CGUIModalScreen(this, parent, -1);

-                modalScreen->drop();

-                modalScreen->addChild(d);

-        }

-

-        return d;

-}

-

-

-//! adds a static text. The returned pointer must not be dropped.

-IGUIStaticText* CGUIEnvironment::addStaticText(const wchar_t* text,

-                                const core::rect<s32>& rectangle,

-                                bool border, bool wordWrap,

-                                IGUIElement* parent, s32 id, bool background)

-{

-        IGUIStaticText* d = new CGUIStaticText(text, border, this,

-                        parent ? parent : this, id, rectangle, background);

-

-        d->setWordWrap(wordWrap);

-        d->drop();

-

-        return d;

-}

-

-

-//! Adds an edit box. The returned pointer must not be dropped.

-IGUIEditBox* CGUIEnvironment::addEditBox(const wchar_t* text,

-                        const core::rect<s32>& rectangle, bool border,

-                        IGUIElement* parent, s32 id)

-{

-        IGUIEditBox* d = new CGUIEditBox(text, border, this,

-                        parent ? parent : this, id, rectangle);

-

-        d->drop();

-        return d;

-}

-

-

-//! Adds a spin box to the environment

-IGUISpinBox* CGUIEnvironment::addSpinBox(const wchar_t* text,

-                                         const core::rect<s32> &rectangle,

-                                         bool border,IGUIElement* parent, s32 id)

-{

-        IGUISpinBox* d = new CGUISpinBox(text, border,this,

-                parent ? parent : this, id, rectangle);

-

-        d->drop();

-        return d;

-}

-

-

-//! Adds a tab control to the environment.

-IGUITabControl* CGUIEnvironment::addTabControl(const core::rect<s32>& rectangle,

-        IGUIElement* parent, bool fillbackground, bool border, s32 id)

-{

-        IGUITabControl* t = new CGUITabControl(this, parent ? parent : this,

-                rectangle, fillbackground, border, id);

-        t->drop();

-        return t;

-}

-

-

-//! Adds tab to the environment.

-IGUITab* CGUIEnvironment::addTab(const core::rect<s32>& rectangle,

-        IGUIElement* parent, s32 id)

-{

-        IGUITab* t = new CGUITab(-1, this, parent ? parent : this,

-                rectangle, id);

-        t->drop();

-        return t;

-}

-

-

-//! Adds a context menu to the environment.

-IGUIContextMenu* CGUIEnvironment::addContextMenu(const core::rect<s32>& rectangle,

-        IGUIElement* parent, s32 id)

-{

-        IGUIContextMenu* c = new CGUIContextMenu(this,

-                parent ? parent : this, id, rectangle, true);

-        c->drop();

-        return c;

-}

-

-

-//! Adds a menu to the environment.

-IGUIContextMenu* CGUIEnvironment::addMenu(IGUIElement* parent, s32 id)

-{

-        if (!parent)

-                parent = this;

-

-        IGUIContextMenu* c = new CGUIMenu(this,

-                parent, id, core::rect<s32>(0,0,

-                                parent->getAbsolutePosition().getWidth(),

-                                parent->getAbsolutePosition().getHeight()));

-

-        c->drop();

-        return c;

-}

-

-

-//! Adds a toolbar to the environment. It is like a menu is always placed on top

-//! in its parent, and contains buttons.

-IGUIToolBar* CGUIEnvironment::addToolBar(IGUIElement* parent, s32 id)

-{

-        if (!parent)

-                parent = this;

-

-        IGUIToolBar* b = new CGUIToolBar(this, parent, id, core::rect<s32>(0,0,10,10));

-        b->drop();

-        return b;

-}

-

-

-//! Adds an element for fading in or out.

-IGUIInOutFader* CGUIEnvironment::addInOutFader(const core::rect<s32>* rectangle, IGUIElement* parent, s32 id)

-{

-        core::rect<s32> rect;

-

-        if (rectangle)

-                rect = *rectangle;

-        else if (Driver)

-                rect = core::rect<s32>(core::position2d<s32>(0,0), core::dimension2di(Driver->getScreenSize()));

-

-        if (!parent)

-                parent = this;

-

-        IGUIInOutFader* fader = new CGUIInOutFader(this, parent, id, rect);

-        fader->drop();

-        return fader;

-}

-

-

-//! Adds a combo box to the environment.

-IGUIComboBox* CGUIEnvironment::addComboBox(const core::rect<s32>& rectangle,

-        IGUIElement* parent, s32 id)

-{

-        IGUIComboBox* t = new CGUIComboBox(this, parent ? parent : this,

-                id, rectangle);

-        t->drop();

-        return t;

-}

-

-

-//! returns the font

-IGUIFont* CGUIEnvironment::getFont(const io::path& filename)

-{

-        // search existing font

-

-        SFont f;

-        f.NamedPath.setPath(filename);

-

-        s32 index = Fonts.binary_search(f);

-        if (index != -1)

-                return Fonts[index].Font;

-

-        // font doesn't exist, attempt to load it

-

-        // does the file exist?

-

-        if (!FileSystem->existFile(filename))

-        {

-                os::Printer::log("Could not load font because the file does not exist", f.NamedPath.getPath(), ELL_ERROR);

-                return 0;

-        }

-

-        IGUIFont* ifont=0;

-        io::IXMLReader *xml = FileSystem->createXMLReader(filename );

-        if (xml)

-        {

-                // this is an XML font, but we need to know what type

-                EGUI_FONT_TYPE t = EGFT_CUSTOM;

-

-                bool found=false;

-                while(!found && xml->read())

-                {

-                        if (xml->getNodeType() == io::EXN_ELEMENT)

-                        {

-                                if (core::stringw(L"font") == xml->getNodeName())

-                                {

-                                        if (core::stringw(L"vector") == xml->getAttributeValue(L"type"))

-                                        {

-                                                t = EGFT_VECTOR;

-                                                found=true;

-                                        }

-                                        else if (core::stringw(L"bitmap") == xml->getAttributeValue(L"type"))

-                                        {

-                                                t = EGFT_BITMAP;

-                                                found=true;

-                                        }

-                                        else found=true;

-                                }

-                        }

-                }

-

-                if (t==EGFT_BITMAP)

-                {

-                        CGUIFont* font = new CGUIFont(this, filename);

-                        ifont = (IGUIFont*)font;

-                        // change working directory, for loading textures

-                        io::path workingDir = FileSystem->getWorkingDirectory();

-                        FileSystem->changeWorkingDirectoryTo(FileSystem->getFileDir(f.NamedPath.getPath()));

-

-                        // load the font

-                        if (!font->load(xml))

-                        {

-                                font->drop();

-                                font  = 0;

-                                ifont = 0;

-                        }

-                        // change working dir back again

-                        FileSystem->changeWorkingDirectoryTo( workingDir );

-                }

-                else if (t==EGFT_VECTOR)

-                {

-                        // todo: vector fonts

-                        os::Printer::log("Unable to load font, XML vector fonts are not supported yet", f.NamedPath, ELL_ERROR);

-

-                        //CGUIFontVector* font = new CGUIFontVector(Driver);

-                        //ifont = (IGUIFont*)font;

-                        //if (!font->load(xml))

-                }

-                xml->drop();

-        }

-

-

-        if (!ifont)

-        {

-

-                CGUIFont* font = new CGUIFont(this, f.NamedPath.getPath() );

-                ifont = (IGUIFont*)font;

-                if (!font->load(f.NamedPath.getPath()))

-                {

-                        font->drop();

-                        return 0;

-                }

-        }

-

-        // add to fonts.

-

-        f.Font = ifont;

-        Fonts.push_back(f);

-

-        return ifont;

-}

-

-

-//! add an externally loaded font

-IGUIFont* CGUIEnvironment::addFont(const io::path& name, IGUIFont* font)

-{

-        if (font)

-        {

-                SFont f;

-                f.NamedPath.setPath(name);

-                s32 index = Fonts.binary_search(f);

-                if (index != -1)

-                        return Fonts[index].Font;

-                f.Font = font;

-                Fonts.push_back(f);

-                font->grab();

-        }

-        return font;

-}

-

-//! remove loaded font

-void CGUIEnvironment::removeFont(IGUIFont* font)

-{

-        if ( !font )

-                return;

-        for ( u32 i=0; i<Fonts.size(); ++i )

-        {

-                if ( Fonts[i].Font == font )

-                {

-                        Fonts[i].Font->drop();

-                        Fonts.erase(i);

-                        return;

-                }

-        }

-}

-

-//! returns default font

-IGUIFont* CGUIEnvironment::getBuiltInFont() const

-{

-        if (Fonts.empty())

-                return 0;

-

-        return Fonts[0].Font;

-}

-

-

-IGUISpriteBank* CGUIEnvironment::getSpriteBank(const io::path& filename)

-{

-        // search for the file name

-

-        SSpriteBank b;

-        b.NamedPath.setPath(filename);

-

-        s32 index = Banks.binary_search(b);

-        if (index != -1)

-                return Banks[index].Bank;

-

-        // we don't have this sprite bank, we should load it

-        if (!FileSystem->existFile(b.NamedPath.getPath()))

-        {

-                if ( filename != DefaultFontName )

-                {

-                        os::Printer::log("Could not load sprite bank because the file does not exist", b.NamedPath.getPath(), ELL_DEBUG);

-                }

-                return 0;

-        }

-

-        // todo: load it!

-

-        return 0;

-}

-

-

-IGUISpriteBank* CGUIEnvironment::addEmptySpriteBank(const io::path& name)

-{

-        // no duplicate names allowed

-

-        SSpriteBank b;

-        b.NamedPath.setPath(name);

-

-        const s32 index = Banks.binary_search(b);

-        if (index != -1)

-                return 0;

-

-        // create a new sprite bank

-

-        b.Bank = new CGUISpriteBank(this);

-        Banks.push_back(b);

-

-        return b.Bank;

-}

-

-

-//! Creates the image list from the given texture.

-IGUIImageList* CGUIEnvironment::createImageList(  video::ITexture* texture,

-                                        core::dimension2d<s32>  imageSize, bool useAlphaChannel )

-{

-        CGUIImageList* imageList = new CGUIImageList( Driver );

-        if( !imageList->createImageList( texture, imageSize, useAlphaChannel ) )

-        {

-                imageList->drop();

-                return 0;

-        }

-

-        return imageList;

-}

-

-//! Returns the root gui element.

-IGUIElement* CGUIEnvironment::getRootGUIElement()

-{

-        return this;

-}

-

-

-//! Returns the next element in the tab group starting at the focused element

-IGUIElement* CGUIEnvironment::getNextElement(bool reverse, bool group)

-{

-        // start the search at the root of the current tab group

-        IGUIElement *startPos = Focus ? Focus->getTabGroup() : 0;

-        s32 startOrder = -1;

-

-        // if we're searching for a group

-        if (group && startPos)

-        {

-                startOrder = startPos->getTabOrder();

-        }

-        else

-        if (!group && Focus && !Focus->isTabGroup())

-        {

-                startOrder = Focus->getTabOrder();

-                if (startOrder == -1)

-                {

-                        // this element is not part of the tab cycle,

-                        // but its parent might be...

-                        IGUIElement *el = Focus;

-                        while (el && el->getParent() && startOrder == -1)

-                        {

-                                el = el->getParent();

-                                startOrder = el->getTabOrder();

-                        }

-

-                }

-        }

-

-        if (group || !startPos)

-                startPos = this; // start at the root

-

-        // find the element

-        IGUIElement *closest = 0;

-        IGUIElement *first = 0;

-        startPos->getNextElement(startOrder, reverse, group, first, closest);

-

-        if (closest)

-                return closest; // we found an element

-        else if (first)

-                return first; // go to the end or the start

-        else if (group)

-                return this; // no group found? root group

-        else

-                return 0;

-}

-

-

-//! creates an GUI Environment

-IGUIEnvironment* createGUIEnvironment(io::IFileSystem* fs,

-                                        video::IVideoDriver* Driver,

-                                        IOSOperator* op)

-{

-        return new CGUIEnvironment(fs, Driver, op);

-}

-

-

-} // end namespace gui

-} // end namespace irr

-

-#endif // _IRR_COMPILE_WITH_GUI_

-

+
+// Copyright (C) 2002-2012 Nikolaus Gebhardt
+// This file is part of the "Irrlicht Engine".
+// For conditions of distribution and use, see copyright notice in irrlicht.h
+
+#include "CGUIEnvironment.h"
+
+#ifdef _IRR_COMPILE_WITH_GUI_
+
+#include "IVideoDriver.h"
+
+#include "CGUISkin.h"
+#include "CGUIButton.h"
+#include "CGUIWindow.h"
+#include "CGUIScrollBar.h"
+#include "CGUIFont.h"
+#include "CGUISpriteBank.h"
+#include "CGUIImage.h"
+#include "CGUIMeshViewer.h"
+#include "CGUICheckBox.h"
+#include "CGUIListBox.h"
+#include "CGUITreeView.h"
+#include "CGUIImageList.h"
+#include "CGUIFileOpenDialog.h"
+#include "CGUIColorSelectDialog.h"
+#include "CGUIStaticText.h"
+#include "CGUIEditBox.h"
+#include "CGUISpinBox.h"
+#include "CGUIInOutFader.h"
+#include "CGUIMessageBox.h"
+#include "CGUIModalScreen.h"
+#include "CGUITabControl.h"
+#include "CGUIContextMenu.h"
+#include "CGUIComboBox.h"
+#include "CGUIMenu.h"
+#include "CGUIToolBar.h"
+#include "CGUITable.h"
+
+#include "CDefaultGUIElementFactory.h"
+#include "IWriteFile.h"
+#include "IXMLWriter.h"
+
+#include "BuiltInFont.h"
+#include "os.h"
+
+namespace irr
+{
+namespace gui
+{
+
+const wchar_t* IRR_XML_FORMAT_GUI_ENV                   = L"irr_gui";
+const wchar_t* IRR_XML_FORMAT_GUI_ELEMENT               = L"element";
+const wchar_t* IRR_XML_FORMAT_GUI_ELEMENT_ATTR_TYPE     = L"type";
+
+const io::path CGUIEnvironment::DefaultFontName = "#DefaultFont";
+
+//! constructor
+CGUIEnvironment::CGUIEnvironment(io::IFileSystem* fs, video::IVideoDriver* driver, IOSOperator* op)
+: IGUIElement(EGUIET_ROOT, 0, 0, 0, core::rect<s32>(core::position2d<s32>(0,0), driver ? core::dimension2d<s32>(driver->getScreenSize()) : core::dimension2d<s32>(0,0))),
+        Driver(driver), Hovered(0), HoveredNoSubelement(0), Focus(0), LastHoveredMousePos(0,0), CurrentSkin(0),
+        FileSystem(fs), UserReceiver(0), Operator(op)
+{
+        if (Driver)
+                Driver->grab();
+
+        if (FileSystem)
+                FileSystem->grab();
+
+        if (Operator)
+                Operator->grab();
+
+        #ifdef _DEBUG
+        IGUIEnvironment::setDebugName("CGUIEnvironment");
+        #endif
+
+        // gui factory
+        IGUIElementFactory* factory = new CDefaultGUIElementFactory(this);
+        registerGUIElementFactory(factory);
+        factory->drop();
+
+        loadBuiltInFont();
+
+        IGUISkin* skin = createSkin( gui::EGST_WINDOWS_METALLIC );
+        setSkin(skin);
+        skin->drop();
+
+        //set tooltip default
+        ToolTip.LastTime = 0;
+        ToolTip.EnterTime = 0;
+        ToolTip.LaunchTime = 1000;
+        ToolTip.RelaunchTime = 500;
+        ToolTip.Element = 0;
+
+        // environment is root tab group
+        Environment = this;
+        setTabGroup(true);
+}
+
+
+//! destructor
+CGUIEnvironment::~CGUIEnvironment()
+{
+        if ( HoveredNoSubelement && HoveredNoSubelement != this )
+        {
+                HoveredNoSubelement->drop();
+                HoveredNoSubelement = 0;
+        }
+
+        if (Hovered && Hovered != this)
+        {
+                Hovered->drop();
+                Hovered = 0;
+        }
+
+        if (Focus)
+        {
+                Focus->drop();
+                Focus = 0;
+        }
+
+        if (ToolTip.Element)
+        {
+                ToolTip.Element->drop();
+                ToolTip.Element = 0;
+        }
+
+        // drop skin
+        if (CurrentSkin)
+        {
+                CurrentSkin->drop();
+                CurrentSkin = 0;
+        }
+
+        u32 i;
+
+        // delete all sprite banks
+        for (i=0; i<Banks.size(); ++i)
+                if (Banks[i].Bank)
+                        Banks[i].Bank->drop();
+
+        // delete all fonts
+        for (i=0; i<Fonts.size(); ++i)
+                Fonts[i].Font->drop();
+
+        // remove all factories
+        for (i=0; i<GUIElementFactoryList.size(); ++i)
+                GUIElementFactoryList[i]->drop();
+
+        if (Operator)
+        {
+                Operator->drop();
+                Operator = 0;
+        }
+
+        if (FileSystem)
+        {
+                FileSystem->drop();
+                FileSystem = 0;
+        }
+
+        if (Driver)
+        {
+                Driver->drop();
+                Driver = 0;
+        }
+}
+
+
+void CGUIEnvironment::loadBuiltInFont()
+{
+        io::IReadFile* file = io::createMemoryReadFile(BuiltInFontData, BuiltInFontDataSize, DefaultFontName, false);
+
+        CGUIFont* font = new CGUIFont(this, DefaultFontName );
+        if (!font->load(file))
+        {
+                os::Printer::log("Error: Could not load built-in Font. Did you compile without the BMP loader?", ELL_ERROR);
+                font->drop();
+                file->drop();
+                return;
+        }
+
+        SFont f;
+        f.NamedPath.setPath(DefaultFontName);
+        f.Font = font;
+        Fonts.push_back(f);
+
+        file->drop();
+}
+
+
+//! draws all gui elements
+void CGUIEnvironment::drawAll()
+{
+        if (Driver)
+        {
+                core::dimension2d<s32> dim(Driver->getScreenSize());
+                if (AbsoluteRect.LowerRightCorner.X != dim.Width ||
+                        AbsoluteRect.LowerRightCorner.Y != dim.Height)
+                {
+                        // resize gui environment
+                        DesiredRect.LowerRightCorner = dim;
+                        AbsoluteClippingRect = DesiredRect;
+                        AbsoluteRect = DesiredRect;
+                        updateAbsolutePosition();
+                }
+        }
+
+        // make sure tooltip is always on top
+        if (ToolTip.Element)
+                bringToFront(ToolTip.Element);
+
+        draw();
+        OnPostRender ( os::Timer::getTime () );
+}
+
+
+//! sets the focus to an element
+bool CGUIEnvironment::setFocus(IGUIElement* element)
+{
+        if (Focus == element)
+        {
+                _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+                return false;
+        }
+
+        // GUI Environment should not get the focus
+        if (element == this)
+                element = 0;
+
+        // stop element from being deleted
+        if (element)
+                element->grab();
+
+        // focus may change or be removed in this call
+        IGUIElement *currentFocus = 0;
+        if (Focus)
+        {
+                currentFocus = Focus;
+                currentFocus->grab();
+                SEvent e;
+                e.EventType = EET_GUI_EVENT;
+                e.GUIEvent.Caller = Focus;
+                e.GUIEvent.Element = element;
+                e.GUIEvent.EventType = EGET_ELEMENT_FOCUS_LOST;
+                if (Focus->OnEvent(e))
+                {
+                        if (element)
+                                element->drop();
+                        currentFocus->drop();
+                        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+                        return false;
+                }
+                currentFocus->drop();
+                currentFocus = 0;
+        }
+
+        if (element)
+        {
+                currentFocus = Focus;
+                if (currentFocus)
+                        currentFocus->grab();
+
+                // send focused event
+                SEvent e;
+                e.EventType = EET_GUI_EVENT;
+                e.GUIEvent.Caller = element;
+                e.GUIEvent.Element = Focus;
+                e.GUIEvent.EventType = EGET_ELEMENT_FOCUSED;
+                if (element->OnEvent(e))
+                {
+                        if (element)
+                                element->drop();
+                        if (currentFocus)
+                                currentFocus->drop();
+                        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+                        return false;
+                }
+        }
+
+        if (currentFocus)
+                currentFocus->drop();
+
+        if (Focus)
+                Focus->drop();
+
+        // element is the new focus so it doesn't have to be dropped
+        Focus = element;
+
+        return true;
+}
+
+
+//! returns the element with the focus
+IGUIElement* CGUIEnvironment::getFocus() const
+{
+        return Focus;
+}
+
+//! returns the element last known to be under the mouse cursor
+IGUIElement* CGUIEnvironment::getHovered() const
+{
+        return Hovered;
+}
+
+
+//! removes the focus from an element
+bool CGUIEnvironment::removeFocus(IGUIElement* element)
+{
+        if (Focus && Focus==element)
+        {
+                SEvent e;
+                e.EventType = EET_GUI_EVENT;
+                e.GUIEvent.Caller = Focus;
+                e.GUIEvent.Element = 0;
+                e.GUIEvent.EventType = EGET_ELEMENT_FOCUS_LOST;
+                if (Focus->OnEvent(e))
+                {
+                        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+                        return false;
+                }
+        }
+        if (Focus)
+        {
+                Focus->drop();
+                Focus = 0;
+        }
+
+        return true;
+}
+
+
+//! Returns if the element has focus
+bool CGUIEnvironment::hasFocus(IGUIElement* element) const
+{
+        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+        return (element == Focus);
+}
+
+
+//! returns the current video driver
+video::IVideoDriver* CGUIEnvironment::getVideoDriver() const
+{
+        return Driver;
+}
+
+
+//! returns the current file system
+io::IFileSystem* CGUIEnvironment::getFileSystem() const
+{
+        return FileSystem;
+}
+
+
+//! returns a pointer to the OS operator
+IOSOperator* CGUIEnvironment::getOSOperator() const
+{
+        return Operator;
+}
+
+
+//! clear all GUI elements
+void CGUIEnvironment::clear()
+{
+        // Remove the focus
+        if (Focus)
+        {
+                Focus->drop();
+                Focus = 0;
+        }
+
+        if (Hovered && Hovered != this)
+        {
+                Hovered->drop();
+                Hovered = 0;
+        }
+        if ( HoveredNoSubelement && HoveredNoSubelement != this)
+        {
+                HoveredNoSubelement->drop();
+                HoveredNoSubelement = 0;
+        }
+
+        // get the root's children in case the root changes in future
+        const core::list<IGUIElement*>& children = getRootGUIElement()->getChildren();
+
+        while (!children.empty())
+                (*children.getLast())->remove();
+}
+
+
+//! called by ui if an event happened.
+bool CGUIEnvironment::OnEvent(const SEvent& event)
+{
+        bool ret = false;
+        if (UserReceiver
+                && (event.EventType != EET_MOUSE_INPUT_EVENT)
+                && (event.EventType != EET_KEY_INPUT_EVENT)
+                && (event.EventType != EET_GUI_EVENT || event.GUIEvent.Caller != this))
+        {
+                ret = UserReceiver->OnEvent(event);
+        }
+
+        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+        return ret;
+}
+
+//
+void CGUIEnvironment::OnPostRender( u32 time )
+{
+        // launch tooltip
+        if ( ToolTip.Element == 0 &&
+                HoveredNoSubelement && HoveredNoSubelement != this &&
+                (time - ToolTip.EnterTime >= ToolTip.LaunchTime
+                || (time - ToolTip.LastTime >= ToolTip.RelaunchTime && time - ToolTip.LastTime < ToolTip.LaunchTime)) &&
+                HoveredNoSubelement->getToolTipText().size() &&
+                getSkin() &&
+                getSkin()->getFont(EGDF_TOOLTIP)
+                )
+        {
+                core::rect<s32> pos;
+
+                pos.UpperLeftCorner = LastHoveredMousePos;
+                core::dimension2du dim = getSkin()->getFont(EGDF_TOOLTIP)->getDimension(HoveredNoSubelement->getToolTipText().c_str());
+                dim.Width += getSkin()->getSize(EGDS_TEXT_DISTANCE_X)*2;
+                dim.Height += getSkin()->getSize(EGDS_TEXT_DISTANCE_Y)*2;
+
+                pos.UpperLeftCorner.Y -= dim.Height+1;
+                pos.LowerRightCorner.Y = pos.UpperLeftCorner.Y + dim.Height-1;
+                pos.LowerRightCorner.X = pos.UpperLeftCorner.X + dim.Width;
+
+                pos.constrainTo(getAbsolutePosition());
+
+                ToolTip.Element = addStaticText(HoveredNoSubelement->getToolTipText().c_str(), pos, true, true, this, -1, true);
+                ToolTip.Element->setOverrideColor(getSkin()->getColor(EGDC_TOOLTIP));
+                ToolTip.Element->setBackgroundColor(getSkin()->getColor(EGDC_TOOLTIP_BACKGROUND));
+                ToolTip.Element->setOverrideFont(getSkin()->getFont(EGDF_TOOLTIP));
+                ToolTip.Element->setSubElement(true);
+                ToolTip.Element->grab();
+
+                s32 textHeight = ToolTip.Element->getTextHeight();
+                pos = ToolTip.Element->getRelativePosition();
+                pos.LowerRightCorner.Y = pos.UpperLeftCorner.Y + textHeight;
+                ToolTip.Element->setRelativePosition(pos);
+        }
+
+        if (ToolTip.Element && ToolTip.Element->isVisible() )   // (isVisible() check only because we might use visibility for ToolTip one day)
+        {
+                ToolTip.LastTime = time;
+
+                // got invisible or removed in the meantime?
+                if ( !HoveredNoSubelement ||
+                        !HoveredNoSubelement->isVisible() ||
+                        !HoveredNoSubelement->getParent()
+                        )       // got invisible or removed in the meantime?
+                {
+                        ToolTip.Element->remove();
+                        ToolTip.Element->drop();
+                        ToolTip.Element = 0;
+                }
+        }
+
+        IGUIElement::OnPostRender ( time );
+}
+
+
+//
+void CGUIEnvironment::updateHoveredElement(core::position2d<s32> mousePos)
+{
+        IGUIElement* lastHovered = Hovered;
+        IGUIElement* lastHoveredNoSubelement = HoveredNoSubelement;
+        LastHoveredMousePos = mousePos;
+
+        Hovered = getElementFromPoint(mousePos);
+
+        if ( ToolTip.Element && Hovered == ToolTip.Element )
+        {
+                // When the mouse is over the ToolTip we remove that so it will be re-created at a new position.
+                // Note that ToolTip.EnterTime does not get changed here, so it will be re-created at once.
+                ToolTip.Element->remove();
+                ToolTip.Element->drop();
+                ToolTip.Element = 0;
+
+                // Get the real Hovered
+                Hovered = getElementFromPoint(mousePos);
+        }
+
+        // for tooltips we want the element itself and not some of it's subelements
+        HoveredNoSubelement = Hovered;
+        while ( HoveredNoSubelement && HoveredNoSubelement->isSubElement() )
+        {
+                HoveredNoSubelement = HoveredNoSubelement->getParent();
+        }
+
+        if (Hovered && Hovered != this)
+                Hovered->grab();
+        if ( HoveredNoSubelement && HoveredNoSubelement != this)
+                HoveredNoSubelement->grab();
+
+        if (Hovered != lastHovered)
+        {
+                SEvent event;
+                event.EventType = EET_GUI_EVENT;
+
+                if (lastHovered)
+                {
+                        event.GUIEvent.Caller = lastHovered;
+                        event.GUIEvent.Element = 0;
+                        event.GUIEvent.EventType = EGET_ELEMENT_LEFT;
+                        lastHovered->OnEvent(event);
+                }
+
+                if ( Hovered )
+                {
+                        event.GUIEvent.Caller  = Hovered;
+                        event.GUIEvent.Element = Hovered;
+                        event.GUIEvent.EventType = EGET_ELEMENT_HOVERED;
+                        Hovered->OnEvent(event);
+                }
+        }
+
+        if ( lastHoveredNoSubelement != HoveredNoSubelement )
+        {
+                if (ToolTip.Element)
+                {
+                        ToolTip.Element->remove();
+                        ToolTip.Element->drop();
+                        ToolTip.Element = 0;
+                }
+
+                if ( HoveredNoSubelement )
+                {
+                        u32 now = os::Timer::getTime();
+                        ToolTip.EnterTime = now;
+                }
+        }
+
+        if (lastHovered && lastHovered != this)
+                lastHovered->drop();
+        if (lastHoveredNoSubelement && lastHoveredNoSubelement != this)
+                lastHoveredNoSubelement->drop();
+}
+
+
+//! This sets a new event receiver for gui events. Usually you do not have to
+//! use this method, it is used by the internal engine.
+void CGUIEnvironment::setUserEventReceiver(IEventReceiver* evr)
+{
+        UserReceiver = evr;
+}
+
+
+//! posts an input event to the environment
+bool CGUIEnvironment::postEventFromUser(const SEvent& event)
+{
+        switch(event.EventType)
+        {
+        case EET_GUI_EVENT:
+                // hey, why is the user sending gui events..?
+                break;
+        case EET_MOUSE_INPUT_EVENT:
+
+                updateHoveredElement(core::position2d<s32>(event.MouseInput.X, event.MouseInput.Y));
+
+                if (event.MouseInput.Event == EMIE_LMOUSE_PRESSED_DOWN)
+                        if ( (Hovered && Hovered != Focus) || !Focus )
+                {
+                        setFocus(Hovered);
+                }
+
+                // sending input to focus
+                if (Focus && Focus->OnEvent(event))
+                        return true;
+
+                // focus could have died in last call
+                if (!Focus && Hovered)
+                {
+                        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+                        return Hovered->OnEvent(event);
+                }
+
+                break;
+        case EET_KEY_INPUT_EVENT:
+                {
+                        if (Focus && Focus->OnEvent(event))
+                                return true;
+
+                        // For keys we handle the event before changing focus to give elements the chance for catching the TAB
+                        // Send focus changing event
+                        if (event.EventType == EET_KEY_INPUT_EVENT &&
+                                event.KeyInput.PressedDown &&
+                                event.KeyInput.Key == KEY_TAB)
+                        {
+                                IGUIElement *next = getNextElement(event.KeyInput.Shift, event.KeyInput.Control);
+                                if (next && next != Focus)
+                                {
+                                        if (setFocus(next))
+                                                return true;
+                                }
+                        }
+
+                }
+                break;
+        default:
+                break;
+        } // end switch
+
+        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+        return false;
+}
+
+
+//! returns the current gui skin
+IGUISkin* CGUIEnvironment::getSkin() const
+{
+        return CurrentSkin;
+}
+
+
+//! Sets a new GUI Skin
+void CGUIEnvironment::setSkin(IGUISkin* skin)
+{
+        if (CurrentSkin==skin)
+                return;
+
+        if (CurrentSkin)
+                CurrentSkin->drop();
+
+        CurrentSkin = skin;
+
+        if (CurrentSkin)
+                CurrentSkin->grab();
+}
+
+
+//! Creates a new GUI Skin based on a template.
+/** \return Returns a pointer to the created skin.
+If you no longer need the skin, you should call IGUISkin::drop().
+See IReferenceCounted::drop() for more information. */
+IGUISkin* CGUIEnvironment::createSkin(EGUI_SKIN_TYPE type)
+{
+        IGUISkin* skin = new CGUISkin(type, Driver);
+
+        IGUIFont* builtinfont = getBuiltInFont();
+        IGUIFontBitmap* bitfont = 0;
+        if (builtinfont && builtinfont->getType() == EGFT_BITMAP)
+                bitfont = (IGUIFontBitmap*)builtinfont;
+
+        IGUISpriteBank* bank = 0;
+        skin->setFont(builtinfont);
+
+        if (bitfont)
+                bank = bitfont->getSpriteBank();
+
+        skin->setSpriteBank(bank);
+
+        return skin;
+}
+
+
+//! Returns the default element factory which can create all built in elements
+IGUIElementFactory* CGUIEnvironment::getDefaultGUIElementFactory() const
+{
+        return getGUIElementFactory(0);
+}
+
+
+//! Adds an element factory to the gui environment.
+/** Use this to extend the gui environment with new element types which it should be
+able to create automaticly, for example when loading data from xml files. */
+void CGUIEnvironment::registerGUIElementFactory(IGUIElementFactory* factoryToAdd)
+{
+        if (factoryToAdd)
+        {
+                factoryToAdd->grab();
+                GUIElementFactoryList.push_back(factoryToAdd);
+        }
+}
+
+
+//! Returns amount of registered scene node factories.
+u32 CGUIEnvironment::getRegisteredGUIElementFactoryCount() const
+{
+        return GUIElementFactoryList.size();
+}
+
+
+//! Returns a scene node factory by index
+IGUIElementFactory* CGUIEnvironment::getGUIElementFactory(u32 index) const
+{
+        if (index < GUIElementFactoryList.size())
+                return GUIElementFactoryList[index];
+        else
+                return 0;
+}
+
+
+//! adds a GUI Element using its name
+IGUIElement* CGUIEnvironment::addGUIElement(const c8* elementName, IGUIElement* parent)
+{
+        IGUIElement* node=0;
+
+        if (!parent)
+                parent = this;
+
+        for (s32 i=GUIElementFactoryList.size()-1; i>=0 && !node; --i)
+                node = GUIElementFactoryList[i]->addGUIElement(elementName, parent);
+
+
+        return node;
+}
+
+
+//! Saves the current gui into a file.
+//! \param filename: Name of the file .
+bool CGUIEnvironment::saveGUI(const io::path& filename, IGUIElement* start)
+{
+        io::IWriteFile* file = FileSystem->createAndWriteFile(filename);
+        if (!file)
+        {
+                _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+                return false;
+        }
+
+        bool ret = saveGUI(file, start);
+        file->drop();
+        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+        return ret;
+}
+
+
+//! Saves the current gui into a file.
+bool CGUIEnvironment::saveGUI(io::IWriteFile* file, IGUIElement* start)
+{
+        if (!file)
+        {
+                _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+                return false;
+        }
+
+        io::IXMLWriter* writer = FileSystem->createXMLWriter(file);
+        if (!writer)
+        {
+                _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+                return false;
+        }
+
+        writer->writeXMLHeader();
+        writeGUIElement(writer, start ? start : this);
+        writer->drop();
+
+        return true;
+}
+
+
+//! Loads the gui. Note that the current gui is not cleared before.
+//! \param filename: Name of the file.
+bool CGUIEnvironment::loadGUI(const io::path& filename, IGUIElement* parent)
+{
+        io::IReadFile* read = FileSystem->createAndOpenFile(filename);
+        if (!read)
+        {
+                os::Printer::log("Unable to open gui file", filename, ELL_ERROR);
+                _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+                return false;
+        }
+
+        bool ret = loadGUI(read, parent);
+        read->drop();
+
+        _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+        return ret;
+}
+
+
+//! Loads the gui. Note that the current gui is not cleared before.
+bool CGUIEnvironment::loadGUI(io::IReadFile* file, IGUIElement* parent)
+{
+        if (!file)
+        {
+                os::Printer::log("Unable to open GUI file", ELL_ERROR);
+                _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+                return false;
+        }
+
+        io::IXMLReader* reader = FileSystem->createXMLReader(file);
+        if (!reader)
+        {
+                os::Printer::log("GUI is not a valid XML file", file->getFileName(), ELL_ERROR);
+                _IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
+                return false;
+        }
+
+        // read file
+        while(reader->read())
+        {
+                readGUIElement(reader, parent);
+        }
+
+        // finish up
+
+        reader->drop();
+        return true;
+}
+
+
+//! reads an element
+void CGUIEnvironment::readGUIElement(io::IXMLReader* reader, IGUIElement* node)
+{
+        if (!reader)
+                return;
+
+        io::EXML_NODE nodeType = reader->getNodeType();
+
+        if (nodeType == io::EXN_NONE || nodeType == io::EXN_UNKNOWN || nodeType == io::EXN_ELEMENT_END)
+                return;
+
+        IGUIElement* deferedNode = 0;
+        if (!wcscmp(IRR_XML_FORMAT_GUI_ENV, reader->getNodeName()))
+        {
+                // GuiEnvironment always must be this as it would serialize into a wrong element otherwise.
+                // So we use the given node next time
+                if ( node && node != this )
+                        deferedNode = node;
+                node = this; // root
+        }
+        else if (!wcscmp(IRR_XML_FORMAT_GUI_ELEMENT, reader->getNodeName()))
+        {
+                // find node type and create it
+                const core::stringc attrName = reader->getAttributeValue(IRR_XML_FORMAT_GUI_ELEMENT_ATTR_TYPE);
+
+                node = addGUIElement(attrName.c_str(), node);
+
+                if (!node)
+                        os::Printer::log("Could not create GUI element of unknown type", attrName.c_str());
+        }
+
+        // read attributes
+
+        while(reader->read())
+        {
+                bool endreached = false;
+
+                switch (reader->getNodeType())
+                {
+                case io::EXN_ELEMENT_END:
+                        if (!wcscmp(IRR_XML_FORMAT_GUI_ELEMENT,  reader->getNodeName()) ||
+                                !wcscmp(IRR_XML_FORMAT_GUI_ENV, reader->getNodeName()))
+                        {
+                                endreached = true;
+                        }
+                        break;
+                case io::EXN_ELEMENT:
+                        if (!wcscmp(L"attributes", reader->getNodeName()))
+                        {
+                                // read attributes
+                                io::IAttributes* attr = FileSystem->createEmptyAttributes(Driver);
+                                attr->read(reader, true);
+
+                                if (node)
+                                        node->deserializeAttributes(attr);
+
+                                attr->drop();
+                        }
+                        else
+                        if (!wcscmp(IRR_XML_FORMAT_GUI_ELEMENT, reader->getNodeName()) ||
+                                !wcscmp(IRR_XML_FORMAT_GUI_ENV, reader->getNodeName()))
+                        {
+                                if ( deferedNode )
+                                        readGUIElement(reader, deferedNode);
+                                else
+                                        readGUIElement(reader, node);
+                        }
+                        else
+                        {
+                                os::Printer::log("Found unknown element in irrlicht GUI file",
+                                                core::stringc(reader->getNodeName()).c_str());
+                        }
+
+                        break;
+                default:
+                        break;
+                }
+
+                if (endreached)
+                        break;
+        }
+}
+
+
+//! writes an element
+void CGUIEnvironment::writeGUIElement(io::IXMLWriter* writer, IGUIElement* node)
+{
+        if (!writer || !node )
+                return;
+
+        const wchar_t* name = 0;
+
+        // write properties
+
+        io::IAttributes* attr = FileSystem->createEmptyAttributes();
+        node->serializeAttributes(attr);
+
+        // all gui elements must have at least one attribute
+        // if they have nothing then we ignore them.
+        if (attr->getAttributeCount() != 0)
+        {
+                if (node == this)
+                {
+                        name = IRR_XML_FORMAT_GUI_ENV;
+                        writer->writeElement(name, false);
+                }
+                else
+                {
+                        name = IRR_XML_FORMAT_GUI_ELEMENT;
+                        writer->writeElement(name, false, IRR_XML_FORMAT_GUI_ELEMENT_ATTR_TYPE,
+                                core::stringw(node->getTypeName()).c_str());
+                }
+
+                writer->writeLineBreak();
+                writer->writeLineBreak();
+
+                attr->write(writer);
+                writer->writeLineBreak();
+        }
+
+        // write children
+
+        core::list<IGUIElement*>::ConstIterator it = node->getChildren().begin();
+        for (; it != node->getChildren().end(); ++it)
+        {
+                if (!(*it)->isSubElement())
+                        writeGUIElement(writer, (*it));
+        }
+
+        // write closing brace if required
+        if (attr->getAttributeCount() != 0)
+        {
+                writer->writeClosingTag(name);
+                writer->writeLineBreak();
+                writer->writeLineBreak();
+        }
+
+        attr->drop();
+}
+
+
+//! Writes attributes of the environment
+void CGUIEnvironment::serializeAttributes(io::IAttributes* out, io::SAttributeReadWriteOptions* options) const
+{
+        IGUISkin* skin = getSkin();
+
+        if (skin)
+        {
+                out->addEnum("Skin", getSkin()->getType(), GUISkinTypeNames);
+                skin->serializeAttributes(out, options);
+        }
+}
+
+
+//! Reads attributes of the environment
+void CGUIEnvironment::deserializeAttributes(io::IAttributes* in, io::SAttributeReadWriteOptions* options)
+{
+        if (in->existsAttribute("Skin"))
+        {
+                IGUISkin *skin = getSkin();
+
+                EGUI_SKIN_TYPE t = (EGUI_SKIN_TYPE) in->getAttributeAsEnumeration("Skin",GUISkinTypeNames);
+                if ( !skin || t != skin->getType())
+                {
+                        skin = createSkin(t);
+                        setSkin(skin);
+                        skin->drop();
+                }
+
+                skin = getSkin();
+
+                if (skin)
+                {
+                        skin->deserializeAttributes(in, options);
+                }
+
+        }
+
+        RelativeRect = AbsoluteRect =
+                        core::rect<s32>(core::position2d<s32>(0,0),
+                        Driver ? core::dimension2di(Driver->getScreenSize()) : core::dimension2d<s32>(0,0));
+}
+
+
+//! adds a button. The returned pointer must not be dropped.
+IGUIButton* CGUIEnvironment::addButton(const core::rect<s32>& rectangle, IGUIElement* parent, s32 id, const wchar_t* text, const wchar_t *tooltiptext)
+{
+        IGUIButton* button = new CGUIButton(this, parent ? parent : this, id, rectangle);
+        if (text)
+                button->setText(text);
+
+        if ( tooltiptext )
+                button->setToolTipText ( tooltiptext );
+
+        button->drop();
+        return button;
+}
+
+
+//! adds a window. The returned pointer must not be dropped.
+IGUIWindow* CGUIEnvironment::addWindow(const core::rect<s32>& rectangle, bool modal,
+                const wchar_t* text, IGUIElement* parent, s32 id)
+{
+        parent = parent ? parent : this;
+
+        IGUIWindow* win = new CGUIWindow(this, parent, id, rectangle);
+        if (text)
+                win->setText(text);
+        win->drop();
+
+        if (modal)
+        {
+                // Careful, don't just set the modal as parent above. That will mess up the focus (and is hard to change because we have to be very
+                // careful not to get virtual function call, like OnEvent, in the window.
+                CGUIModalScreen * modalScreen = new CGUIModalScreen(this, parent, -1);
+                modalScreen->drop();
+                modalScreen->addChild(win);
+        }
+
+        return win;
+}
+
+
+//! adds a modal screen. The returned pointer must not be dropped.
+IGUIElement* CGUIEnvironment::addModalScreen(IGUIElement* parent)
+{
+        parent = parent ? parent : this;
+
+        IGUIElement *win = new CGUIModalScreen(this, parent, -1);
+        win->drop();
+
+        return win;
+}
+
+
+//! Adds a message box.
+IGUIWindow* CGUIEnvironment::addMessageBox(const wchar_t* caption, const wchar_t* text,
+        bool modal, s32 flag, IGUIElement* parent, s32 id, video::ITexture* image)
+{
+        if (!CurrentSkin)
+                return 0;
+
+        parent = parent ? parent : this;
+
+        core::rect<s32> rect;
+        core::dimension2d<u32> screenDim, msgBoxDim;
+
+        screenDim.Width = parent->getAbsolutePosition().getWidth();
+        screenDim.Height = parent->getAbsolutePosition().getHeight();
+        msgBoxDim.Width = 2;
+        msgBoxDim.Height = 2;
+
+        rect.UpperLeftCorner.X = (screenDim.Width - msgBoxDim.Width) / 2;
+        rect.UpperLeftCorner.Y = (screenDim.Height - msgBoxDim.Height) / 2;
+        rect.LowerRightCorner.X = rect.UpperLeftCorner.X + msgBoxDim.Width;
+        rect.LowerRightCorner.Y = rect.UpperLeftCorner.Y + msgBoxDim.Height;
+
+        IGUIWindow* win = new CGUIMessageBox(this, caption, text, flag,
+                parent, id, rect, image);
+        win->drop();
+
+        if (modal)
+        {
+                // Careful, don't just set the modal as parent above. That will mess up the focus (and is hard to change because we have to be very
+                // careful not to get virtual function call, like OnEvent, in the CGUIMessageBox.
+                CGUIModalScreen * modalScreen = new CGUIModalScreen(this, parent, -1);
+                modalScreen->drop();
+                modalScreen->addChild( win );
+        }
+
+
+        return win;
+}
+
+
+//! adds a scrollbar. The returned pointer must not be dropped.
+IGUIScrollBar* CGUIEnvironment::addScrollBar(bool horizontal, const core::rect<s32>& rectangle, IGUIElement* parent, s32 id)
+{
+        IGUIScrollBar* bar = new CGUIScrollBar(horizontal, this, parent ? parent : this, id, rectangle);
+        bar->drop();
+        return bar;
+}
+
+//! Adds a table to the environment
+IGUITable* CGUIEnvironment::addTable(const core::rect<s32>& rectangle, IGUIElement* parent, s32 id, bool drawBackground)
+{
+        CGUITable* b = new CGUITable(this, parent ? parent : this, id, rectangle, true, drawBackground, false);
+        b->drop();
+        return b;
+}
+
+
+//! Adds an image element.
+IGUIImage* CGUIEnvironment::addImage(video::ITexture* image, core::position2d<s32> pos,
+        bool useAlphaChannel, IGUIElement* parent, s32 id, const wchar_t* text)
+{
+        core::dimension2d<s32> sz(0,0);
+        if (image)
+                sz = core::dimension2d<s32>(image->getOriginalSize());
+
+        IGUIImage* img = new CGUIImage(this, parent ? parent : this,
+                id, core::rect<s32>(pos, sz));
+
+        if (text)
+                img->setText(text);
+
+        if (useAlphaChannel)
+                img->setUseAlphaChannel(true);
+
+        if (image)
+                img->setImage(image);
+
+        img->drop();
+        return img;
+}
+
+
+//! adds an image. The returned pointer must not be dropped.
+IGUIImage* CGUIEnvironment::addImage(const core::rect<s32>& rectangle, IGUIElement* parent, s32 id, const wchar_t* text, bool useAlphaChannel)
+{
+        IGUIImage* img = new CGUIImage(this, parent ? parent : this,
+                id, rectangle);
+
+        if (text)
+                img->setText(text);
+
+        if ( useAlphaChannel )
+                img->setUseAlphaChannel(true);
+
+        img->drop();
+        return img;
+}
+
+
+//! adds an mesh viewer. The returned pointer must not be dropped.
+IGUIMeshViewer* CGUIEnvironment::addMeshViewer(const core::rect<s32>& rectangle, IGUIElement* parent, s32 id, const wchar_t* text)
+{
+        IGUIMeshViewer* v = new CGUIMeshViewer(this, parent ? parent : this,
+                id, rectangle);
+
+        if (text)
+                v->setText(text);
+
+        v->drop();
+        return v;
+}
+
+
+//! adds a checkbox
+IGUICheckBox* CGUIEnvironment::addCheckBox(bool checked, const core::rect<s32>& rectangle, IGUIElement* parent, s32 id, const wchar_t* text)
+{
+        IGUICheckBox* b = new CGUICheckBox(checked, this,
+                parent ? parent : this , id , rectangle);
+
+        if (text)
+                b->setText(text);
+
+        b->drop();
+        return b;
+}
+
+
+//! adds a list box
+IGUIListBox* CGUIEnvironment::addListBox(const core::rect<s32>& rectangle,
+                                        IGUIElement* parent, s32 id, bool drawBackground)
+{
+        IGUIListBox* b = new CGUIListBox(this, parent ? parent : this, id, rectangle,
+                true, drawBackground, false);
+
+        if (CurrentSkin && CurrentSkin->getSpriteBank())
+        {
+                b->setSpriteBank(CurrentSkin->getSpriteBank());
+        }
+        else if (getBuiltInFont() && getBuiltInFont()->getType() == EGFT_BITMAP)
+        {
+                b->setSpriteBank( ((IGUIFontBitmap*)getBuiltInFont())->getSpriteBank());
+        }
+
+        b->drop();
+        return b;
+}
+
+//! adds a tree view
+IGUITreeView* CGUIEnvironment::addTreeView(const core::rect<s32>& rectangle,
+                                         IGUIElement* parent, s32 id,
+                                         bool drawBackground,
+                                         bool scrollBarVertical, bool scrollBarHorizontal)
+{
+        IGUITreeView* b = new CGUITreeView(this, parent ? parent : this, id, rectangle,
+                true, drawBackground, scrollBarVertical, scrollBarHorizontal);
+
+        b->setIconFont ( getBuiltInFont () );
+        b->drop();
+        return b;
+}
+
+//! adds a file open dialog. The returned pointer must not be dropped.
+IGUIFileOpenDialog* CGUIEnvironment::addFileOpenDialog(const wchar_t* title,
+                                bool modal, IGUIElement* parent, s32 id,
+                                bool restoreCWD, io::path::char_type* startDir)
+{
+        parent = parent ? parent : this;
+
+        IGUIFileOpenDialog* d = new CGUIFileOpenDialog(title, this, parent, id,
+                        restoreCWD, startDir);
+        d->drop();
+
+        if (modal)
+        {
+                // Careful, don't just set the modal as parent above. That will mess up the focus (and is hard to change because we have to be very
+                // careful not to get virtual function call, like OnEvent, in the window.
+                CGUIModalScreen * modalScreen = new CGUIModalScreen(this, parent, -1);
+                modalScreen->drop();
+                modalScreen->addChild(d);
+        }
+
+        return d;
+}
+
+
+//! adds a color select dialog. The returned pointer must not be dropped.
+IGUIColorSelectDialog* CGUIEnvironment::addColorSelectDialog(const wchar_t* title,
+                                bool modal, IGUIElement* parent, s32 id)
+{
+        parent = parent ? parent : this;
+
+        IGUIColorSelectDialog* d = new CGUIColorSelectDialog( title,
+                        this, parent, id);
+        d->drop();
+
+        if (modal)
+        {
+                // Careful, don't just set the modal as parent above. That will mess up the focus (and is hard to change because we have to be very
+                // careful not to get virtual function call, like OnEvent, in the window.
+                CGUIModalScreen * modalScreen = new CGUIModalScreen(this, parent, -1);
+                modalScreen->drop();
+                modalScreen->addChild(d);
+        }
+
+        return d;
+}
+
+
+//! adds a static text. The returned pointer must not be dropped.
+IGUIStaticText* CGUIEnvironment::addStaticText(const wchar_t* text,
+                                const core::rect<s32>& rectangle,
+                                bool border, bool wordWrap,
+                                IGUIElement* parent, s32 id, bool background)
+{
+        IGUIStaticText* d = new CGUIStaticText(text, border, this,
+                        parent ? parent : this, id, rectangle, background);
+
+        d->setWordWrap(wordWrap);
+        d->drop();
+
+        return d;
+}
+
+
+//! Adds an edit box. The returned pointer must not be dropped.
+IGUIEditBox* CGUIEnvironment::addEditBox(const wchar_t* text,
+                        const core::rect<s32>& rectangle, bool border,
+                        IGUIElement* parent, s32 id)
+{
+        IGUIEditBox* d = new CGUIEditBox(text, border, this,
+                        parent ? parent : this, id, rectangle);
+
+        d->drop();
+        return d;
+}
+
+
+//! Adds a spin box to the environment
+IGUISpinBox* CGUIEnvironment::addSpinBox(const wchar_t* text,
+                                         const core::rect<s32> &rectangle,
+                                         bool border,IGUIElement* parent, s32 id)
+{
+        IGUISpinBox* d = new CGUISpinBox(text, border,this,
+                parent ? parent : this, id, rectangle);
+
+        d->drop();
+        return d;
+}
+
+
+//! Adds a tab control to the environment.
+IGUITabControl* CGUIEnvironment::addTabControl(const core::rect<s32>& rectangle,
+        IGUIElement* parent, bool fillbackground, bool border, s32 id)
+{
+        IGUITabControl* t = new CGUITabControl(this, parent ? parent : this,
+                rectangle, fillbackground, border, id);
+        t->drop();
+        return t;
+}
+
+
+//! Adds tab to the environment.
+IGUITab* CGUIEnvironment::addTab(const core::rect<s32>& rectangle,
+        IGUIElement* parent, s32 id)
+{
+        IGUITab* t = new CGUITab(-1, this, parent ? parent : this,
+                rectangle, id);
+        t->drop();
+        return t;
+}
+
+
+//! Adds a context menu to the environment.
+IGUIContextMenu* CGUIEnvironment::addContextMenu(const core::rect<s32>& rectangle,
+        IGUIElement* parent, s32 id)
+{
+        IGUIContextMenu* c = new CGUIContextMenu(this,
+                parent ? parent : this, id, rectangle, true);
+        c->drop();
+        return c;
+}
+
+
+//! Adds a menu to the environment.
+IGUIContextMenu* CGUIEnvironment::addMenu(IGUIElement* parent, s32 id)
+{
+        if (!parent)
+                parent = this;
+
+        IGUIContextMenu* c = new CGUIMenu(this,
+                parent, id, core::rect<s32>(0,0,
+                                parent->getAbsolutePosition().getWidth(),
+                                parent->getAbsolutePosition().getHeight()));
+
+        c->drop();
+        return c;
+}
+
+
+//! Adds a toolbar to the environment. It is like a menu is always placed on top
+//! in its parent, and contains buttons.
+IGUIToolBar* CGUIEnvironment::addToolBar(IGUIElement* parent, s32 id)
+{
+        if (!parent)
+                parent = this;
+
+        IGUIToolBar* b = new CGUIToolBar(this, parent, id, core::rect<s32>(0,0,10,10));
+        b->drop();
+        return b;
+}
+
+
+//! Adds an element for fading in or out.
+IGUIInOutFader* CGUIEnvironment::addInOutFader(const core::rect<s32>* rectangle, IGUIElement* parent, s32 id)
+{
+        core::rect<s32> rect;
+
+        if (rectangle)
+                rect = *rectangle;
+        else if (Driver)
+                rect = core::rect<s32>(core::position2d<s32>(0,0), core::dimension2di(Driver->getScreenSize()));
+
+        if (!parent)
+                parent = this;
+
+        IGUIInOutFader* fader = new CGUIInOutFader(this, parent, id, rect);
+        fader->drop();
+        return fader;
+}
+
+
+//! Adds a combo box to the environment.
+IGUIComboBox* CGUIEnvironment::addComboBox(const core::rect<s32>& rectangle,
+        IGUIElement* parent, s32 id)
+{
+        IGUIComboBox* t = new CGUIComboBox(this, parent ? parent : this,
+                id, rectangle);
+        t->drop();
+        return t;
+}
+
+
+//! returns the font
+IGUIFont* CGUIEnvironment::getFont(const io::path& filename)
+{
+        // search existing font
+
+        SFont f;
+        f.NamedPath.setPath(filename);
+
+        s32 index = Fonts.binary_search(f);
+        if (index != -1)
+                return Fonts[index].Font;
+
+        // font doesn't exist, attempt to load it
+
+        // does the file exist?
+
+        if (!FileSystem->existFile(filename))
+        {
+                os::Printer::log("Could not load font because the file does not exist", f.NamedPath.getPath(), ELL_ERROR);
+                return 0;
+        }
+
+        IGUIFont* ifont=0;
+        io::IXMLReader *xml = FileSystem->createXMLReader(filename );
+        if (xml)
+        {
+                // this is an XML font, but we need to know what type
+                EGUI_FONT_TYPE t = EGFT_CUSTOM;
+
+                bool found=false;
+                while(!found && xml->read())
+                {
+                        if (xml->getNodeType() == io::EXN_ELEMENT)
+                        {
+                                if (core::stringw(L"font") == xml->getNodeName())
+                                {
+                                        if (core::stringw(L"vector") == xml->getAttributeValue(L"type"))
+                                        {
+                                                t = EGFT_VECTOR;
+                                                found=true;
+                                        }
+                                        else if (core::stringw(L"bitmap") == xml->getAttributeValue(L"type"))
+                                        {
+                                                t = EGFT_BITMAP;
+                                                found=true;
+                                        }
+                                        else found=true;
+                                }
+                        }
+                }
+
+                if (t==EGFT_BITMAP)
+                {
+                        CGUIFont* font = new CGUIFont(this, filename);
+                        ifont = (IGUIFont*)font;
+                        // change working directory, for loading textures
+                        io::path workingDir = FileSystem->getWorkingDirectory();
+                        FileSystem->changeWorkingDirectoryTo(FileSystem->getFileDir(f.NamedPath.getPath()));
+
+                        // load the font
+                        if (!font->load(xml))
+                        {
+                                font->drop();
+                                font  = 0;
+                                ifont = 0;
+                        }
+                        // change working dir back again
+                        FileSystem->changeWorkingDirectoryTo( workingDir );
+                }
+                else if (t==EGFT_VECTOR)
+                {
+                        // todo: vector fonts
+                        os::Printer::log("Unable to load font, XML vector fonts are not supported yet", f.NamedPath, ELL_ERROR);
+
+                        //CGUIFontVector* font = new CGUIFontVector(Driver);
+                        //ifont = (IGUIFont*)font;
+                        //if (!font->load(xml))
+                }
+                xml->drop();
+        }
+
+
+        if (!ifont)
+        {
+
+                CGUIFont* font = new CGUIFont(this, f.NamedPath.getPath() );
+                ifont = (IGUIFont*)font;
+                if (!font->load(f.NamedPath.getPath()))
+                {
+                        font->drop();
+                        return 0;
+                }
+        }
+
+        // add to fonts.
+
+        f.Font = ifont;
+        Fonts.push_back(f);
+
+        return ifont;
+}
+
+
+//! add an externally loaded font
+IGUIFont* CGUIEnvironment::addFont(const io::path& name, IGUIFont* font)
+{
+        if (font)
+        {
+                SFont f;
+                f.NamedPath.setPath(name);
+                s32 index = Fonts.binary_search(f);
+                if (index != -1)
+                        return Fonts[index].Font;
+                f.Font = font;
+                Fonts.push_back(f);
+                font->grab();
+        }
+        return font;
+}
+
+//! remove loaded font
+void CGUIEnvironment::removeFont(IGUIFont* font)
+{
+        if ( !font )
+                return;
+        for ( u32 i=0; i<Fonts.size(); ++i )
+        {
+                if ( Fonts[i].Font == font )
+                {
+                        Fonts[i].Font->drop();
+                        Fonts.erase(i);
+                        return;
+                }
+        }
+}
+
+//! returns default font
+IGUIFont* CGUIEnvironment::getBuiltInFont() const
+{
+        if (Fonts.empty())
+                return 0;
+
+        return Fonts[0].Font;
+}
+
+
+IGUISpriteBank* CGUIEnvironment::getSpriteBank(const io::path& filename)
+{
+        // search for the file name
+
+        SSpriteBank b;
+        b.NamedPath.setPath(filename);
+
+        s32 index = Banks.binary_search(b);
+        if (index != -1)
+                return Banks[index].Bank;
+
+        // we don't have this sprite bank, we should load it
+        if (!FileSystem->existFile(b.NamedPath.getPath()))
+        {
+                if ( filename != DefaultFontName )
+                {
+                        os::Printer::log("Could not load sprite bank because the file does not exist", b.NamedPath.getPath(), ELL_DEBUG);
+                }
+                return 0;
+        }
+
+        // todo: load it!
+
+        return 0;
+}
+
+
+IGUISpriteBank* CGUIEnvironment::addEmptySpriteBank(const io::path& name)
+{
+        // no duplicate names allowed
+
+        SSpriteBank b;
+        b.NamedPath.setPath(name);
+
+        const s32 index = Banks.binary_search(b);
+        if (index != -1)
+                return 0;
+
+        // create a new sprite bank
+
+        b.Bank = new CGUISpriteBank(this);
+        Banks.push_back(b);
+
+        return b.Bank;
+}
+
+
+//! Creates the image list from the given texture.
+IGUIImageList* CGUIEnvironment::createImageList(  video::ITexture* texture,
+                                        core::dimension2d<s32>  imageSize, bool useAlphaChannel )
+{
+        CGUIImageList* imageList = new CGUIImageList( Driver );
+        if( !imageList->createImageList( texture, imageSize, useAlphaChannel ) )
+        {
+                imageList->drop();
+                return 0;
+        }
+
+        return imageList;
+}
+
+//! Returns the root gui element.
+IGUIElement* CGUIEnvironment::getRootGUIElement()
+{
+        return this;
+}
+
+
+//! Returns the next element in the tab group starting at the focused element
+IGUIElement* CGUIEnvironment::getNextElement(bool reverse, bool group)
+{
+        // start the search at the root of the current tab group
+        IGUIElement *startPos = Focus ? Focus->getTabGroup() : 0;
+        s32 startOrder = -1;
+
+        // if we're searching for a group
+        if (group && startPos)
+        {
+                startOrder = startPos->getTabOrder();
+        }
+        else
+        if (!group && Focus && !Focus->isTabGroup())
+        {
+                startOrder = Focus->getTabOrder();
+                if (startOrder == -1)
+                {
+                        // this element is not part of the tab cycle,
+                        // but its parent might be...
+                        IGUIElement *el = Focus;
+                        while (el && el->getParent() && startOrder == -1)
+                        {
+                                el = el->getParent();
+                                startOrder = el->getTabOrder();
+                        }
+
+                }
+        }
+
+        if (group || !startPos)
+                startPos = this; // start at the root
+
+        // find the element
+        IGUIElement *closest = 0;
+        IGUIElement *first = 0;
+        startPos->getNextElement(startOrder, reverse, group, first, closest);
+
+        if (closest)
+                return closest; // we found an element
+        else if (first)
+                return first; // go to the end or the start
+        else if (group)
+                return this; // no group found? root group
+        else
+                return 0;
+}
+
+
+//! creates an GUI Environment
+IGUIEnvironment* createGUIEnvironment(io::IFileSystem* fs,
+                                        video::IVideoDriver* Driver,
+                                        IOSOperator* op)
+{
+        return new CGUIEnvironment(fs, Driver, op);
+}
+
+
+} // end namespace gui
+} // end namespace irr
+
+#endif // _IRR_COMPILE_WITH_GUI_
+