1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/**
* @file llscrollbar.h
* @brief Scrollbar UI widget
*
* $LicenseInfo:firstyear=2001&license=viewergpl$
*
* Copyright (c) 2001-2009, 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.
* $/LicenseInfo$
*/
#ifndef LL_SCROLLBAR_H
#define LL_SCROLLBAR_H
#include "stdtypes.h"
#include "lluictrl.h"
#include "v4color.h"
//
// Constants
//
const S32 SCROLLBAR_SIZE = 16;
//
// Classes
//
class LLScrollbar
: public LLUICtrl
{
public:
enum ORIENTATION { HORIZONTAL, VERTICAL };
LLScrollbar(const std::string& name, LLRect rect,
ORIENTATION orientation,
S32 doc_size, S32 doc_pos, S32 page_size,
void(*change_callback)( S32 new_pos, LLScrollbar* self, void* userdata ),
void* callback_user_data = NULL,
S32 step_size = 1);
virtual ~LLScrollbar();
virtual void setValue(const LLSD& value);
// Overrides from LLView
virtual BOOL handleKeyHere(KEY key, MASK mask);
virtual BOOL handleMouseDown(S32 x, S32 y, MASK mask);
virtual BOOL handleMouseUp(S32 x, S32 y, MASK mask);
virtual BOOL handleHover(S32 x, S32 y, MASK mask);
virtual BOOL handleScrollWheel(S32 x, S32 y, S32 clicks);
virtual BOOL handleHScrollWheel(S32 x, S32 y, S32 clicks);
virtual BOOL handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,
EDragAndDropType cargo_type, void *cargo_data, EAcceptance *accept, std::string &tooltip_msg);
virtual void reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);
virtual void draw();
// How long the "document" is.
void setDocSize( S32 size );
S32 getDocSize() const { return mDocSize; }
// How many "lines" the "document" has scrolled.
// 0 <= DocPos <= DocSize - DocVisibile
void setDocPos( S32 pos, BOOL update_thumb = TRUE );
S32 getDocPos() const { return mDocPos; }
BOOL isAtBeginning();
BOOL isAtEnd();
// Setting both at once.
void setDocParams( S32 size, S32 pos );
// How many "lines" of the "document" is can appear on a page.
void setPageSize( S32 page_size );
S32 getPageSize() const { return mPageSize; }
// The farthest the document can be scrolled (top of the last page).
S32 getDocPosMax() const { return llmax( 0, mDocSize - mPageSize); }
void pageUp(S32 overlap);
void pageDown(S32 overlap);
static void onLineUpBtnPressed(void* userdata);
static void onLineDownBtnPressed(void* userdata);
void setTrackColor( const LLColor4& color ) { mTrackColor = color; }
void setThumbColor( const LLColor4& color ) { mThumbColor = color; }
void setHighlightColor( const LLColor4& color ) { mHighlightColor = color; }
void setShadowColor( const LLColor4& color ) { mShadowColor = color; }
void setOnScrollEndCallback(void (*callback)(void*), void* userdata) { mOnScrollEndCallback = callback; mOnScrollEndData = userdata;}
private:
void updateThumbRect();
void changeLine(S32 delta, BOOL update_thumb );
void (*mChangeCallback)( S32 new_pos, LLScrollbar* self, void* userdata );
void* mCallbackUserData;
const ORIENTATION mOrientation;
S32 mDocSize; // Size of the document that the scrollbar is modeling. Units depend on the user. 0 <= mDocSize.
S32 mDocPos; // Position within the doc that the scrollbar is modeling, in "lines" (user size)
S32 mPageSize; // Maximum number of lines that can be seen at one time.
S32 mStepSize;
BOOL mDocChanged;
LLRect mThumbRect;
S32 mDragStartX;
S32 mDragStartY;
F32 mHoverGlowStrength;
F32 mCurGlowStrength;
LLRect mOrigRect;
S32 mLastDelta;
LLColor4 mTrackColor;
LLColor4 mThumbColor;
LLColor4 mFocusColor;
LLColor4 mHighlightColor;
LLColor4 mShadowColor;
void (*mOnScrollEndCallback)(void*);
void *mOnScrollEndData;
};
#endif // LL_SCROLLBAR_H
|