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
|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qbitmap.h"
#include "qevent.h"
#include "qstylepainter.h"
#include "qrubberband.h"
#include "qtimer.h"
#ifndef QT_NO_RUBBERBAND
#include "qstyle.h"
#include "qstyleoption.h"
#ifdef Q_WS_MAC
# include <private/qt_mac_p.h>
# include <private/qt_cocoa_helpers_mac_p.h>
#endif
#include <qdebug.h>
#include <private/qwidget_p.h>
QT_BEGIN_NAMESPACE
//### a rubberband window type would be a more elegant solution
#define RUBBERBAND_WINDOW_TYPE Qt::ToolTip
class QRubberBandPrivate : public QWidgetPrivate
{
Q_DECLARE_PUBLIC(QRubberBand)
public:
QRect rect;
QRubberBand::Shape shape;
QRegion clipping;
void updateMask();
};
/*!
Initialize \a option with the values from this QRubberBand. This method
is useful for subclasses when they need a QStyleOptionRubberBand, but don't want
to fill in all the information themselves.
\sa QStyleOption::initFrom()
*/
void QRubberBand::initStyleOption(QStyleOptionRubberBand *option) const
{
if (!option)
return;
option->initFrom(this);
option->shape = d_func()->shape;
#ifndef Q_WS_MAC
option->opaque = true;
#else
option->opaque = windowFlags() & RUBBERBAND_WINDOW_TYPE;
#endif
}
/*!
\class QRubberBand
\brief The QRubberBand class provides a rectangle or line that can
indicate a selection or a boundary.
\ingroup misc
\mainclass
A rubber band is often used to show a new bounding area (as in a
QSplitter or a QDockWidget that is undocking). Historically this has
been implemented using a QPainter and XOR, but this approach
doesn't always work properly since rendering can happen in the
window below the rubber band, but before the rubber band has been
"erased".
You can create a QRubberBand whenever you need to render a rubber band
around a given area (or to represent a single line), then call
setGeometry(), move() or resize() to position and size it. A common
pattern is to do this in conjunction with mouse events. For example:
\snippet doc/src/snippets/code/src_gui_widgets_qrubberband.cpp 0
If you pass a parent to QRubberBand's constructor, the rubber band will
display only inside its parent, but stays on top of other child widgets.
If no parent is passed, QRubberBand will act as a top-level widget.
Call show() to make the rubber band visible; also when the
rubber band is not a top-level. Hiding or destroying
the widget will make the rubber band disappear. The rubber band
can be a \l Rectangle or a \l Line (vertical or horizontal),
depending on the shape() it was given when constructed.
*/
// ### DOC: How about some nice convenience constructors?
//QRubberBand::QRubberBand(QRubberBand::Type t, const QRect &rect, QWidget *p)
//QRubberBand::QRubberBand(QRubberBand::Type t, int x, int y, int w, int h, QWidget *p)
/*!
Constructs a rubber band of shape \a s, with parent \a p.
By default a rectangular rubber band (\a s is \c Rectangle) will
use a mask, so that a small border of the rectangle is all
that is visible. Some styles (e.g., native Mac OS X) will
change this and call QWidget::setWindowOpacity() to make a
semi-transparent filled selection rectangle.
*/
QRubberBand::QRubberBand(Shape s, QWidget *p)
: QWidget(*new QRubberBandPrivate, p, (p && p->windowType() != Qt::Desktop) ? Qt::Widget : RUBBERBAND_WINDOW_TYPE)
{
Q_D(QRubberBand);
d->shape = s;
setAttribute(Qt::WA_TransparentForMouseEvents);
#ifndef Q_WS_WIN
setAttribute(Qt::WA_NoSystemBackground);
#endif //Q_WS_WIN
setAttribute(Qt::WA_WState_ExplicitShowHide);
setVisible(false);
#ifdef Q_WS_MAC
if (isWindow()) {
createWinId();
extern OSWindowRef qt_mac_window_for(const QWidget *); //qwidget_mac.cpp
macWindowSetHasShadow(qt_mac_window_for(this), false);
}
#endif
}
/*!
Destructor.
*/
QRubberBand::~QRubberBand()
{
}
/*!
\enum QRubberBand::Shape
This enum specifies what shape a QRubberBand should have. This is
a drawing hint that is passed down to the style system, and can be
interpreted by each QStyle.
\value Line A QRubberBand can represent a vertical or horizontal
line. Geometry is still given in rect() and the line
will fill the given geometry on most styles.
\value Rectangle A QRubberBand can represent a rectangle. Some
styles will interpret this as a filled (often
semi-transparent) rectangle, or a rectangular
outline.
*/
/*!
Returns the shape of this rubber band. The shape can only be set
upon construction.
*/
QRubberBand::Shape QRubberBand::shape() const
{
Q_D(const QRubberBand);
return d->shape;
}
/*!
\internal
*/
void QRubberBandPrivate::updateMask()
{
Q_Q(QRubberBand);
QStyleHintReturnMask mask;
QStyleOptionRubberBand opt;
q->initStyleOption(&opt);
if (q->style()->styleHint(QStyle::SH_RubberBand_Mask, &opt, q, &mask)) {
q->setMask(mask.region);
} else {
q->clearMask();
}
}
/*!
\reimp
*/
void QRubberBand::paintEvent(QPaintEvent *)
{
QStylePainter painter(this);
QStyleOptionRubberBand option;
initStyleOption(&option);
painter.drawControl(QStyle::CE_RubberBand, option);
}
/*!
\reimp
*/
void QRubberBand::changeEvent(QEvent *e)
{
QWidget::changeEvent(e);
switch (e->type()) {
case QEvent::ParentChange:
if (parent()) {
setWindowFlags(windowFlags() & ~RUBBERBAND_WINDOW_TYPE);
} else {
setWindowFlags(windowFlags() | RUBBERBAND_WINDOW_TYPE);
}
break;
default:
break;
}
if (e->type() == QEvent::ZOrderChange)
raise();
}
/*!
\reimp
*/
void QRubberBand::showEvent(QShowEvent *e)
{
raise();
e->ignore();
}
/*!
\reimp
*/
void QRubberBand::resizeEvent(QResizeEvent *)
{
Q_D(QRubberBand);
d->updateMask();
}
/*!
\reimp
*/
void QRubberBand::moveEvent(QMoveEvent *)
{
Q_D(QRubberBand);
d->updateMask();
}
/*!
\fn void QRubberBand::move(const QPoint &p);
\overload
Moves the rubberband to point \a p.
\sa resize()
*/
/*!
\fn void QRubberBand::move(int x, int y);
Moves the rubberband to point (\a x, \a y).
\sa resize()
*/
/*!
\fn void QRubberBand::resize(const QSize &size);
\overload
Resizes the rubberband so that its new size is \a size.
\sa move()
*/
/*!
\fn void QRubberBand::resize(int width, int height);
Resizes the rubberband so that its width is \a width, and its
height is \a height.
\sa move()
*/
/*!
\fn void QRubberBand::setGeometry(const QRect &rect)
Sets the geometry of the rubber band to \a rect, specified in the coordinate system
of its parent widget.
\sa QWidget::geometry
*/
void QRubberBand::setGeometry(const QRect &geom)
{
QWidget::setGeometry(geom);
}
/*!
\fn void QRubberBand::setGeometry(int x, int y, int width, int height)
\overload
Sets the geometry of the rubberband to the rectangle whose top-left corner lies at
the point (\a x, \a y), and with dimensions specified by \a width and \a height.
The geometry is specified in the parent widget's coordinate system.
*/
/*! \reimp */
bool QRubberBand::event(QEvent *e)
{
return QWidget::event(e);
}
QT_END_NAMESPACE
#endif // QT_NO_RUBBERBAND
|