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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "common/rect.h"
#include "common/system.h"
#include "common/timer.h"
#include "gui/widgets/scrollbar.h"
#include "gui/gui-manager.h"
#include "gui/ThemeEngine.h"
namespace GUI {
#define UP_DOWN_BOX_HEIGHT (_w+1)
ScrollBarWidget::ScrollBarWidget(GuiObject *boss, int x, int y, int w, int h)
: Widget (boss, x, y, w, h), CommandSender(boss) {
setFlags(WIDGET_ENABLED | WIDGET_TRACK_MOUSE | WIDGET_CLEARBG | WIDGET_WANT_TICKLE);
_type = kScrollBarWidget;
_part = kNoPart;
_sliderHeight = 0;
_sliderPos = 0;
_draggingPart = kNoPart;
_sliderDeltaMouseDownPos = 0;
_numEntries = 0;
_entriesPerPage = 0;
_currentPos = 0;
_repeatTimer = 0;
}
void ScrollBarWidget::handleMouseDown(int x, int y, int button, int clickCount) {
int old_pos = _currentPos;
// Do nothing if there are less items than fit on one page
if (_numEntries <= _entriesPerPage)
return;
if (y <= UP_DOWN_BOX_HEIGHT) {
// Up arrow
_currentPos--;
_repeatTimer = g_system->getMillis() + kRepeatInitialDelay;
_draggingPart = kUpArrowPart;
} else if (y >= _h - UP_DOWN_BOX_HEIGHT) {
// Down arrow
_currentPos++;
_repeatTimer = g_system->getMillis() + kRepeatInitialDelay;
_draggingPart = kDownArrowPart;
} else if (y < _sliderPos) {
_currentPos -= _entriesPerPage - 1;
} else if (y >= _sliderPos + _sliderHeight) {
_currentPos += _entriesPerPage - 1;
} else {
_draggingPart = kSliderPart;
_sliderDeltaMouseDownPos = y - _sliderPos;
}
// Make sure that _currentPos is still inside the bounds
checkBounds(old_pos);
}
void ScrollBarWidget::handleMouseUp(int x, int y, int button, int clickCount) {
_draggingPart = kNoPart;
_repeatTimer = 0;
}
void ScrollBarWidget::handleMouseWheel(int x, int y, int direction) {
int old_pos = _currentPos;
if (_numEntries < _entriesPerPage)
return;
if (direction < 0) {
_currentPos--;
} else {
_currentPos++;
}
// Make sure that _currentPos is still inside the bounds
checkBounds(old_pos);
}
void ScrollBarWidget::handleMouseMoved(int x, int y, int button) {
// Do nothing if there are less items than fit on one page
if (_numEntries <= _entriesPerPage)
return;
if (_draggingPart == kSliderPart) {
int old_pos = _currentPos;
_sliderPos = y - _sliderDeltaMouseDownPos;
if (_sliderPos < UP_DOWN_BOX_HEIGHT)
_sliderPos = UP_DOWN_BOX_HEIGHT;
if (_sliderPos > _h - UP_DOWN_BOX_HEIGHT - _sliderHeight)
_sliderPos = _h - UP_DOWN_BOX_HEIGHT - _sliderHeight;
_currentPos =
(_sliderPos - UP_DOWN_BOX_HEIGHT) * (_numEntries - _entriesPerPage) / (_h - 2 * UP_DOWN_BOX_HEIGHT - _sliderHeight);
checkBounds(old_pos);
} else {
int old_part = _part;
if (y <= UP_DOWN_BOX_HEIGHT) // Up arrow
_part = kUpArrowPart;
else if (y >= _h - UP_DOWN_BOX_HEIGHT) // Down arrow
_part = kDownArrowPart;
else if (y < _sliderPos)
_part = kPageUpPart;
else if (y >= _sliderPos + _sliderHeight)
_part = kPageDownPart;
else
_part = kSliderPart;
if (old_part != _part)
draw();
}
}
void ScrollBarWidget::handleTickle() {
if (_repeatTimer) {
const uint32 curTime = g_system->getMillis();
if (curTime >= _repeatTimer) {
const int old_pos = _currentPos;
if (_part == kUpArrowPart)
_currentPos -= 3;
else if (_part == kDownArrowPart)
_currentPos += 3;
checkBounds(old_pos);
_repeatTimer = curTime + kRepeatDelay;
}
}
}
void ScrollBarWidget::checkBounds(int old_pos) {
if (_numEntries <= _entriesPerPage || _currentPos < 0)
_currentPos = 0;
else if (_currentPos > _numEntries - _entriesPerPage)
_currentPos = _numEntries - _entriesPerPage;
if (old_pos != _currentPos) {
recalc();
draw();
sendCommand(kSetPositionCmd, _currentPos);
}
}
void ScrollBarWidget::recalc() {
if (_numEntries > _entriesPerPage) {
_sliderHeight = (_h - 2 * UP_DOWN_BOX_HEIGHT) * _entriesPerPage / _numEntries;
if (_sliderHeight < UP_DOWN_BOX_HEIGHT)
_sliderHeight = UP_DOWN_BOX_HEIGHT;
_sliderPos =
UP_DOWN_BOX_HEIGHT + (_h - 2 * UP_DOWN_BOX_HEIGHT - _sliderHeight) * _currentPos / (_numEntries - _entriesPerPage);
if (_sliderPos < 0)
_sliderPos = 0;
setVisible(true);
} else {
_sliderHeight = _h - 2 * UP_DOWN_BOX_HEIGHT;
_sliderPos = UP_DOWN_BOX_HEIGHT;
setVisible(false);
}
}
void ScrollBarWidget::drawWidget() {
if (_draggingPart != kNoPart)
_part = _draggingPart;
ThemeEngine::ScrollbarState state = ThemeEngine::kScrollbarStateNo;
if (_numEntries <= _entriesPerPage) {
state = ThemeEngine::kScrollbarStateSinglePage;
} else if (_part == kUpArrowPart) {
state = ThemeEngine::kScrollbarStateUp;
} else if (_part == kDownArrowPart) {
state = ThemeEngine::kScrollbarStateDown;
} else if (_part == kSliderPart) {
state = ThemeEngine::kScrollbarStateSlider;
}
g_gui.theme()->drawScrollbar(Common::Rect(_x, _y, _x+_w, _y+_h), _sliderPos, _sliderHeight, state, _state);
}
} // End of namespace GUI
|
