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comparison demos/browser/chasewidget.d @ 45:71b382c10ef6

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add coarse and incomplete QT browser port
author mandel
date Sun, 17 May 2009 18:49:59 +0000
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children 7bfd46c330dc
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44:3cb15c92ac28 45:71b382c10ef6
1 /****************************************************************************
2 **
3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4 ** Contact: Qt Software Information (qt-info@nokia.com)
5 **
6 ** This file is part of the demonstration applications of the Qt Toolkit.
7 **
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** Commercial Usage
10 ** Licensees holding valid Qt Commercial licenses may use this file in
11 ** accordance with the Qt Commercial License Agreement provided with the
12 ** Software or, alternatively, in accordance with the terms contained in
13 ** a written agreement between you and Nokia.
14 **
15 ** GNU Lesser General Public License Usage
16 ** Alternatively, this file may be used under the terms of the GNU Lesser
17 ** General Public License version 2.1 as published by the Free Software
18 ** Foundation and appearing in the file LICENSE.LGPL included in the
19 ** packaging of this file. Please review the following information to
20 ** ensure the GNU Lesser General Public License version 2.1 requirements
21 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
22 **
23 ** In addition, as a special exception, Nokia gives you certain
24 ** additional rights. These rights are described in the Nokia Qt LGPL
25 ** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
26 ** package.
27 **
28 ** GNU General Public License Usage
29 ** Alternatively, this file may be used under the terms of the GNU
30 ** General Public License version 3.0 as published by the Free Software
31 ** Foundation and appearing in the file LICENSE.GPL included in the
32 ** packaging of this file. Please review the following information to
33 ** ensure the GNU General Public License version 3.0 requirements will be
34 ** met: http://www.gnu.org/copyleft/gpl.html.
35 **
36 ** If you are unsure which license is appropriate for your use, please
37 ** contact the sales department at qt-sales@nokia.com.
38 ** $QT_END_LICENSE$
39 **
40 ****************************************************************************/
41
42 module chasewidget;
43
44
45 import QtGui.QWidget;
46
47 import QtCore.QSize;
48 import QtGui.QColor;
49 import QtGui.QPixmap;
50
51 import QtCore.QPoint;
52
53 import QtGui.QApplication;
54 import QtGui.QHideEvent;
55 import QtGui.QPainter;
56 import QtGui.QPaintEvent;
57 import QtGui.QShowEvent;
58
59 /*
60 QT_BEGIN_NAMESPACE
61 class QHideEvent;
62 class QShowEvent;
63 class QPaintEvent;
64 class QTimerEvent;
65 QT_END_NAMESPACE
66 */
67
68 class ChaseWidget : public QWidget
69 {
70 Q_OBJECT
71 public:
72 this(QWidget *parent = 0, QPixmap pixmap = QPixmap(), bool pixmapEnabled = false)
73 {
74 super(parent);
75 m_segment = 0;
76 m_delay = 100;
77 m_step = 40;
78 m_timerId = -1;
79 m_animated = false;
80 m_pixmap = pixmap;
81 m_pixmapEnabled = pixmapEnabled;
82 }
83
84 void setAnimated(bool value)
85 {
86 if (m_animated == value)
87 return;
88 m_animated = value;
89 if (m_timerId != -1) {
90 killTimer(m_timerId);
91 m_timerId = -1;
92 }
93 if (m_animated) {
94 m_segment = 0;
95 m_timerId = startTimer(m_delay);
96 }
97 update();
98 }
99
100 void setPixmapEnabled(bool enable);
101 {
102 m_pixmapEnabled = enable;
103 }
104
105
106 QSize sizeHint()
107 {
108 return QSize(32, 32);
109 }
110
111 protected:
112 void paintEvent(QPaintEvent *event)
113 {
114 Q_UNUSED(event);
115 QPainter p(this);
116 if (m_pixmapEnabled && !m_pixmap.isNull()) {
117 p.drawPixmap(0, 0, m_pixmap);
118 return;
119 }
120
121 int extent = qMin(width() - 8, height() - 8);
122 int displ = extent / 4;
123 int ext = extent / 4 - 1;
124
125 p.setRenderHint(QPainter::Antialiasing, true);
126
127 if(m_animated)
128 p.setPen(Qt.gray);
129 else
130 p.setPen(QPen(palette().dark().color()));
131
132 p.translate(width() / 2, height() / 2); // center
133
134 for (int segment = 0; segment < segmentCount(); ++segment) {
135 p.rotate(QApplication::isRightToLeft() ? m_step : -m_step);
136 if(m_animated)
137 p.setBrush(colorForSegment(segment));
138 else
139 p.setBrush(palette().background());
140 p.drawEllipse(QRect(displ, -ext / 2, ext, ext));
141 }
142 }
143
144 void timerEvent(QTimerEvent *event)
145 {
146 if (event->timerId() == m_timerId) {
147 ++m_segment;
148 update();
149 }
150 QWidget.timerEvent(event);
151 }
152
153 private:
154 int segmentCount()
155 {
156 return 360 / m_step;
157 }
158
159
160 QColor colorForSegment(int seg)
161 {
162 int index = ((seg + m_segment) % segmentCount());
163 int comp = qMax(0, 255 - (index * (255 / segmentCount())));
164 return QColor(comp, comp, comp, 255);
165 }
166
167 int m_segment;
168 int m_delay;
169 int m_step;
170 int m_timerId;
171 bool m_animated;
172 QPixmap m_pixmap;
173 bool m_pixmapEnabled;
174 }