/
menuwidget.cpp
395 lines (339 loc) · 9.96 KB
/
menuwidget.cpp
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
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
/** @file menuwidget.cpp
*
* @authors Copyright (c) 2013 Jaakko Keränen <jaakko.keranen@iki.fi>
*
* @par License
* GPL: http://www.gnu.org/licenses/gpl.html
*
* <small>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, see:
* http://www.gnu.org/licenses</small>
*/
#include "ui/widgets/menuwidget.h"
using namespace de;
using namespace ui;
DENG2_PIMPL(MenuWidget)
{
bool needLayout;
SizePolicy colPolicy;
SizePolicy rowPolicy;
Rule const *margin;
//Rule const *padding;
ConstantRule *cols;
ConstantRule *rows;
OperatorRule *colWidth;
OperatorRule *rowHeight;
Instance(Public *i)
: Base(i),
needLayout(false),
colPolicy(Fixed),
rowPolicy(Fixed)
{
cols = new ConstantRule(1);
rows = new ConstantRule(1);
margin = &self.style().rules().rule("gap");
//padding = &self.style().rules().rule("unit");
colWidth = holdRef((self.rule().width() - *margin * 2) / *cols);
rowHeight = holdRef((self.rule().height() - *margin * 2) / *rows);
}
~Instance()
{
releaseRef(cols);
releaseRef(rows);
releaseRef(colWidth);
releaseRef(rowHeight);
}
Vector2i ordinalToGridPos(int ordinal) const
{
Vector2i pos;
if(colPolicy != Expand)
{
pos.x = ordinal % cols->valuei();
pos.y = ordinal / cols->valuei();
}
else if(rows->valuei() > 0)
{
DENG2_ASSERT(rowPolicy != Expand);
pos.x = ordinal % rows->valuei();
pos.y = ordinal / rows->valuei();
}
else
{
DENG2_ASSERT(cols->valuei() > 0);
pos.x = ordinal % cols->valuei();
pos.y = ordinal / cols->valuei();
}
return pos;
}
bool isVisibleItem(Widget const *child) const
{
GuiWidget const *widget = dynamic_cast<GuiWidget const *>(child);
return widget && widget->isVisible();
}
int countVisible() const
{
int num = 0;
foreach(Widget *i, self.Widget::children())
{
if(isVisibleItem(i)) ++num;
}
return num;
}
Vector2i countGrid() const
{
Vector2i size;
int ord = 0;
foreach(Widget *i, self.Widget::children())
{
if(isVisibleItem(i))
{
size = size.max(ordinalToGridPos(ord++) + Vector2i(1, 1));
}
}
return size;
}
GuiWidget *findItem(int col, int row) const
{
int ord = 0;
foreach(Widget *i, self.Widget::children())
{
if(isVisibleItem(i))
{
if(ordinalToGridPos(ord) == Vector2i(col, row))
{
return static_cast<GuiWidget *>(i);
}
ord++;
}
}
return 0;
}
Rule const *fullColumnWidth(int col) const
{
Vector2i const size = countGrid();
Rule const *total = 0;
for(int i = 0; i < size.y; ++i)
{
GuiWidget *item = findItem(col, i);
if(!total)
{
total = holdRef(item->rule().width());
}
else
{
Rule const *old = total;
total = holdRef(OperatorRule::maximum(*total, item->rule().width()));
releaseRef(old);
}
}
if(!total) return new ConstantRule(0);
return refless(total);
}
Rule const *fullRowHeight(int row) const
{
Vector2i const size = countGrid();
Rule const *total = 0;
for(int i = 0; i < size.x; ++i)
{
GuiWidget *item = findItem(i, row);
if(!item) continue;
if(!total)
{
total = holdRef(item->rule().height());
}
else
{
Rule const *old = total;
total = holdRef(OperatorRule::maximum(*total, item->rule().height()));
releaseRef(old);
}
}
if(!total) return new ConstantRule(0);
return refless(total);
}
Rule const *totalWidth() const
{
Vector2i const size = countGrid();
Rule const *total = 0;
for(int i = 0; i < size.x; ++i)
{
if(!total)
{
total = holdRef(fullColumnWidth(i));
}
else
{
Rule const *old = total;
total = holdRef(*total + *fullColumnWidth(i));
releaseRef(old);
}
}
if(!total) return new ConstantRule(0);
return refless(total);
}
Rule const *totalHeight() const
{
Vector2i const size = countGrid();
Rule const *total = 0;
for(int i = 0; i < size.y; ++i)
{
if(!total)
{
total = holdRef(fullRowHeight(i));
}
else
{
Rule const *old = total;
total = holdRef(*total + *fullRowHeight(i));
releaseRef(old);
}
}
if(!total) return new ConstantRule(0);
return refless(total);
}
};
MenuWidget::MenuWidget(String const &name)
: ScrollAreaWidget(name), d(new Instance(this))
{}
void MenuWidget::setGridSize(int columns, ui::SizePolicy columnPolicy,
int rows, ui::SizePolicy rowPolicy)
{
d->cols->set(columns);
d->rows->set(rows);
d->colPolicy = columnPolicy;
d->rowPolicy = rowPolicy;
d->needLayout = true;
}
ButtonWidget *MenuWidget::addItem(String const &styledText, Action *action)
{
return addItem(Image(), styledText, action);
}
ButtonWidget *MenuWidget::addItem(Image const &image, String const &styledText, Action *action)
{
ButtonWidget *b = new ButtonWidget;
b->setImage(image);
b->setText(styledText);
b->setTextAlignment(ui::AlignRight);
b->setAction(action);
add(b);
d->needLayout = true;
return b;
}
void MenuWidget::removeItem(GuiWidget *child)
{
d->needLayout = true;
}
int MenuWidget::count() const
{
return d->countVisible();
}
void MenuWidget::updateLayout()
{
//qDebug() << path().toString() << "Menu has" << d->countVisible() << "visible items";
Rule const *baseVert = holdRef(&contentRule().top());
Vector2i gridSize = d->countGrid();
for(int row = 0; row < gridSize.y; ++row)
{
Rule const *baseHoriz = &contentRule().left();
GuiWidget *previous = 0;
Rule const *rowBottom = 0;
for(int col = 0; col < gridSize.x; ++col)
{
GuiWidget *widget = d->findItem(col, row);
if(!widget) continue;
if(d->colPolicy == Filled)
{
widget->rule()
.setInput(Rule::Left, previous? previous->rule().right() : *baseHoriz)
.setInput(Rule::Width, *d->colWidth);
}
else //if(d->colPolicy == Fixed)
{
if(col > 0)
{
widget->rule().setInput(Rule::Left, contentRule().left() + *d->colWidth * Const(col));
}
else
{
widget->rule().setInput(Rule::Left, contentRule().left());
}
}
if(d->rowPolicy == Filled)
{
// The top/left corner is determined by the grid.
widget->rule()
.setInput(Rule::Top, *baseVert)
.setInput(Rule::Height, *d->rowHeight);
}
else if(d->rowPolicy == Expand)
{
widget->rule().setInput(Rule::Top, *baseVert);
}
else if(d->rowPolicy == Fixed)
{
widget->rule().setInput(Rule::Top, contentRule().top() + *d->rowHeight * Const(row));
}
// Form operator rule for maximum bottom coordinate.
if(!rowBottom)
{
rowBottom = holdRef(widget->rule().bottom());
}
else
{
Rule const *old = rowBottom;
rowBottom = new OperatorRule(OperatorRule::Maximum, widget->rule().bottom(), *old);
releaseRef(old);
}
previous = widget;
}
releaseRef(baseVert);
baseVert = rowBottom;
}
// Determine the width and height of the scrollable content area.
if(d->colPolicy != Expand)
{
setContentWidth(*d->colWidth * Const(gridSize.x));
}
else
{
Rule const *width = d->totalWidth();
setContentWidth(*width);
rule().setInput(Rule::Width, *width + *d->margin * 2);
}
if(d->rowPolicy != Expand)
{
setContentHeight(*d->rowHeight * Const(gridSize.y));
}
else
{
Rule const *height = d->totalHeight();
setContentHeight(*height);
rule().setInput(Rule::Height, *height + *d->margin * 2);
}
// Hold kept references.
releaseRef(baseVert);
d->needLayout = false;
}
Rule const *MenuWidget::newColumnWidthRule(int column) const
{
if(d->colPolicy != Filled)
{
return holdRef(d->fullColumnWidth(column));
}
return holdRef(d->colWidth);
}
void MenuWidget::update()
{
if(isHidden()) return;
ScrollAreaWidget::update();
if(d->needLayout)
{
updateLayout();
}
}