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
|
/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QTest>
#include <QPainter>
#include <QWidget>
#include <QApplication>
#include <private/qhighdpiscaling_p.h>
class TestWidget : public QWidget
{
public:
TestWidget(QWidget *parent = nullptr) : QWidget(parent) {}
QSize sizeHint() const override
{
const int screenWidth = QGuiApplication::primaryScreen()->geometry().width();
const int width = qMax(200, 100 * ((screenWidth + 500) / 1000));
return isWindow() ? QSize(width, width) : QSize(width - 40, width - 40);
}
void initialShow()
{
show();
if (isWindow())
QVERIFY(QTest::qWaitForWindowExposed(this));
paintedRegions = {};
}
bool waitForPainted(int timeout = 5000)
{
return QTest::qWaitFor([this]{ return !paintedRegions.isEmpty(); }, timeout);
}
QRegion takePaintedRegions()
{
QRegion result = paintedRegions;
paintedRegions = {};
return result;
}
QRegion paintedRegions;
protected:
void paintEvent(QPaintEvent *event) override
{
paintedRegions += event->region();
QPainter painter(this);
const QBrush patternBrush = isWindow() ? QBrush(Qt::blue, Qt::VerPattern)
: QBrush(Qt::red, Qt::HorPattern);
painter.fillRect(rect(), patternBrush);
}
};
class tst_QWidgetRepaintManager : public QObject
{
Q_OBJECT
public:
tst_QWidgetRepaintManager();
public slots:
void cleanup();
private slots:
void basic();
void children();
void opaqueChildren();
void staticContents();
void scroll();
private:
const int m_fuzz;
};
tst_QWidgetRepaintManager::tst_QWidgetRepaintManager() :
m_fuzz(int(QHighDpiScaling::factor(QGuiApplication::primaryScreen())))
{
}
void tst_QWidgetRepaintManager::cleanup()
{
QVERIFY(QApplication::topLevelWidgets().isEmpty());
}
void tst_QWidgetRepaintManager::basic()
{
TestWidget widget;
widget.show();
QVERIFY(QTest::qWaitForWindowExposed(&widget));
QCOMPARE(widget.takePaintedRegions(), QRegion(0, 0, widget.width(), widget.height()));
widget.update();
QVERIFY(widget.waitForPainted());
QCOMPARE(widget.takePaintedRegions(), QRegion(0, 0, widget.width(), widget.height()));
widget.repaint();
QCOMPARE(widget.takePaintedRegions(), QRegion(0, 0, widget.width(), widget.height()));
}
/*!
Children cannot assumed to be fully opaque, so the parent will repaint when the
child repaints.
*/
void tst_QWidgetRepaintManager::children()
{
if (QStringList{"android"}.contains(QGuiApplication::platformName()))
QSKIP("This test fails on Android");
TestWidget widget;
widget.initialShow();
TestWidget *child1 = new TestWidget(&widget);
child1->move(20, 20);
child1->show();
QVERIFY(child1->waitForPainted());
QCOMPARE(widget.takePaintedRegions(), QRegion(child1->geometry()));
QCOMPARE(child1->takePaintedRegions(), QRegion(child1->rect()));
child1->move(20, 30);
QVERIFY(widget.waitForPainted());
// both the old and the new area covered by child1 need to be repainted
QCOMPARE(widget.takePaintedRegions(), QRegion(20, 20, child1->width(), child1->height() + 10));
QCOMPARE(child1->takePaintedRegions(), QRegion(child1->rect()));
TestWidget *child2 = new TestWidget(&widget);
child2->move(30, 30);
child2->raise();
child2->show();
QVERIFY(child2->waitForPainted());
QCOMPARE(widget.takePaintedRegions(), QRegion(child2->geometry()));
QCOMPARE(child1->takePaintedRegions(), QRegion(10, 0, child2->width() - 10, child2->height()));
QCOMPARE(child2->takePaintedRegions(), QRegion(child2->rect()));
child1->hide();
QVERIFY(widget.waitForPainted());
QCOMPARE(widget.paintedRegions, QRegion(child1->geometry()));
}
void tst_QWidgetRepaintManager::opaqueChildren()
{
if (QStringList{"android"}.contains(QGuiApplication::platformName()))
QSKIP("This test fails on Android");
TestWidget widget;
widget.initialShow();
TestWidget *child1 = new TestWidget(&widget);
child1->move(20, 20);
child1->setAttribute(Qt::WA_OpaquePaintEvent);
child1->show();
QVERIFY(child1->waitForPainted());
QCOMPARE(widget.takePaintedRegions(), QRegion());
QCOMPARE(child1->takePaintedRegions(), child1->rect());
child1->move(20, 30);
QVERIFY(widget.waitForPainted());
QCOMPARE(widget.takePaintedRegions(), QRegion(20, 20, child1->width(), 10));
if (QGuiApplication::platformName() == "cocoa")
QEXPECT_FAIL("", "child1 shouldn't get painted, we can just move the area of the backingstore", Continue);
QCOMPARE(child1->takePaintedRegions(), QRegion());
}
/*!
When resizing to be larger, a widget with Qt::WA_StaticContents set
should only repaint the newly revealed areas.
*/
void tst_QWidgetRepaintManager::staticContents()
{
TestWidget widget;
widget.setAttribute(Qt::WA_StaticContents);
widget.initialShow();
const QSize oldSize = widget.size();
widget.resize(widget.width() + 10, widget.height());
QVERIFY(widget.waitForPainted());
QEXPECT_FAIL("", "This should just repaint the newly exposed region", Continue);
QCOMPARE(widget.takePaintedRegions(), QRegion(oldSize.width(), 0, 10, widget.height()));
}
/*!
Scrolling a widget.
*/
void tst_QWidgetRepaintManager::scroll()
{
if (QStringList{"android"}.contains(QGuiApplication::platformName()))
QSKIP("This test fails on Android");
TestWidget widget;
widget.initialShow();
widget.scroll(10, 0);
QVERIFY(widget.waitForPainted());
if (QGuiApplication::platformName() == "cocoa")
QEXPECT_FAIL("", "This should just repaint the newly exposed region", Continue);
QCOMPARE(widget.takePaintedRegions(), QRegion(0, 0, 10, widget.height()));
TestWidget *child = new TestWidget(&widget);
child->move(20, 20);
child->initialShow();
// a potentially semi-transparent child scrolling needs a full repaint
child->scroll(10, 0);
QVERIFY(child->waitForPainted());
QCOMPARE(child->takePaintedRegions(), child->rect());
QCOMPARE(widget.takePaintedRegions(), child->geometry());
// a explicitly opaque child scrolling only needs the child to repaint newly exposed regions
child->setAttribute(Qt::WA_OpaquePaintEvent);
child->scroll(10, 0);
QVERIFY(child->waitForPainted());
if (QStringList{"cocoa", "android"}.contains(QGuiApplication::platformName()))
QEXPECT_FAIL("", "This should just repaint the newly exposed region", Continue);
QCOMPARE(child->takePaintedRegions(), QRegion(0, 0, 10, child->height()));
QCOMPARE(widget.takePaintedRegions(), QRegion());
}
QTEST_MAIN(tst_QWidgetRepaintManager)
#include "tst_qwidgetrepaintmanager.moc"
|
