/** 
 * @file lltoolview.cpp
 * @brief A UI contains for tool palette tools
 *
 * $LicenseInfo:firstyear=2001&license=viewergpl$
 * 
 * Copyright (c) 2001-2008, Linden Research, Inc.
 * 
 * Second Life Viewer Source Code
 * The source code in this file ("Source Code") is provided by Linden Lab
 * to you under the terms of the GNU General Public License, version 2.0
 * ("GPL"), unless you have obtained a separate licensing agreement
 * ("Other License"), formally executed by you and Linden Lab.  Terms of
 * the GPL can be found in doc/GPL-license.txt in this distribution, or
 * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
 * 
 * There are special exceptions to the terms and conditions of the GPL as
 * it is applied to this Source Code. View the full text of the exception
 * in the file doc/FLOSS-exception.txt in this software distribution, or
 * online at http://secondlifegrid.net/programs/open_source/licensing/flossexception
 * 
 * By copying, modifying or distributing this software, you acknowledge
 * that you have read and understood your obligations described above,
 * and agree to abide by those obligations.
 * 
 * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
 * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
 * COMPLETENESS OR PERFORMANCE.
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "lltoolview.h"

#include "llfontgl.h"
#include "llrect.h"

#include "llagent.h"
#include "llbutton.h"
#include "llpanel.h"
#include "lltool.h"
#include "lltoolmgr.h"
#include "lltextbox.h"
#include "llresmgr.h"


LLToolContainer::LLToolContainer(LLToolView* parent)
:	mParent(parent),
	mButton(NULL),
	mPanel(NULL),
	mTool(NULL)
{ }


LLToolContainer::~LLToolContainer()
{
	// mParent is a pointer to the tool view
	// mButton is owned by the tool view
	// mPanel is owned by the tool view
	delete mTool;
	mTool = NULL;
}


LLToolView::LLToolView(const std::string& name, const LLRect& rect)
:	LLView(name, rect, MOUSE_OPAQUE),
	mButtonCount(0)
{
}


LLToolView::~LLToolView()
{
	mContainList.deleteAllData();
}

//*TODO:translate?
void LLToolView::addTool(const LLString& icon_off, const LLString& icon_on, LLPanel* panel, LLTool* tool, LLView* hoverView, const char* label)
{
	llassert(tool);

	LLToolContainer* contain = new LLToolContainer(this);

	LLRect btn_rect = getButtonRect(mButtonCount);

	contain->mButton = new LLButton("ToolBtn",
		btn_rect, 
		icon_off,
		icon_on, 
		"",
		&LLToolView::onClickToolButton,
		contain,
		LLFontGL::sSansSerif);

	contain->mPanel = panel;
	contain->mTool = tool;

	addChild(contain->mButton);
	mButtonCount++;

	const S32 LABEL_TOP_SPACING = 0;
	const LLFontGL* font = gResMgr->getRes( LLFONT_SANSSERIF_SMALL );
	S32 label_width = font->getWidth( label );
	LLRect label_rect;
	label_rect.setLeftTopAndSize( 
		btn_rect.mLeft + btn_rect.getWidth() / 2 - label_width / 2,
		btn_rect.mBottom - LABEL_TOP_SPACING,
		label_width, 
		llfloor(font->getLineHeight()));
	addChild( new LLTextBox( "tool label", label_rect, label, font ) );

	// Can optionally ignore panel
	if (contain->mPanel)
	{
		contain->mPanel->setBackgroundVisible( FALSE );
		contain->mPanel->setBorderVisible( FALSE );
		addChild(contain->mPanel);
	}

	mContainList.addData(contain);
}


LLRect LLToolView::getButtonRect(S32 button_index)
{
	const S32 HPAD = 7;
	const S32 VPAD = 7;
	const S32 TOOL_SIZE = 32;
	const S32 HORIZ_SPACING = TOOL_SIZE + 5;
	const S32 VERT_SPACING = TOOL_SIZE + 14;

	S32 tools_per_row = mRect.getWidth() / HORIZ_SPACING;

	S32 row = button_index / tools_per_row;
	S32 column = button_index % tools_per_row; 

	// Build the rectangle, recalling the origin is at lower left
	// and we want the icons to build down from the top.
	LLRect rect;
	rect.setLeftTopAndSize( HPAD + (column * HORIZ_SPACING),
							-VPAD + getRect().getHeight() - (row * VERT_SPACING),
							TOOL_SIZE,
							TOOL_SIZE
							);

	return rect;
}


void LLToolView::draw()
{
	// turn off highlighting for all containers 
	// and hide all option panels except for the selected one.
	LLTool* selected = gToolMgr->getCurrentToolset()->getSelectedTool();
	for( LLToolContainer* contain = mContainList.getFirstData();
		 contain != NULL;
		 contain = mContainList.getNextData()
		)
	{
		BOOL state = (contain->mTool == selected);
		contain->mButton->setToggleState( state );
		if (contain->mPanel)
		{
			contain->mPanel->setVisible( state );
		}
	}

	// Draw children normally
	LLView::draw();
}

// protected
LLToolContainer* LLToolView::findToolContainer( LLTool *tool )
{
	// Find the container for this tool
	llassert( tool );
	for( LLToolContainer* contain = mContainList.getFirstData(); contain; contain = mContainList.getNextData() )
	{
		if( contain->mTool == tool )
		{
			return contain;
		}
	}
	llerrs << "LLToolView::findToolContainer - tool not found" << llendl;
	return NULL;
}

// static
void LLToolView::onClickToolButton(void* userdata)
{
	LLToolContainer* clicked = (LLToolContainer*) userdata;

	// Switch to this one
	gToolMgr->getCurrentToolset()->selectTool( clicked->mTool );
}