1 /****************************************************************************
2 **
3 ** Copyright (C) 2016 The Qt Company Ltd.
4 ** Contact: https://www.qt.io/licensing/
5 **
6 ** This file is part of the Qt Assistant of the Qt Toolkit.
7 **
8 ** $QT_BEGIN_LICENSE:GPL-EXCEPT$
9 ** Commercial License Usage
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17 ** GNU General Public License Usage
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19 ** General Public License version 3 as published by the Free Software
20 ** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
21 ** included in the packaging of this file. Please review the following
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25 ** $QT_END_LICENSE$
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27 ****************************************************************************/
28
29 #include "aboutdialog.h"
30
31 #include "helpviewer.h"
32 #include "tracer.h"
33
34 #include <QtCore/QBuffer>
35
36 #include <QtWidgets/QLabel>
37 #include <QtWidgets/QPushButton>
38 #include <QtWidgets/QLayout>
39 #include <QtWidgets/QApplication>
40 #include <QtWidgets/QMessageBox>
41 #include <QtGui/QDesktopServices>
42 #include <QtGui/QScreen>
43
44 QT_BEGIN_NAMESPACE
45
AboutLabel(QWidget * parent)46 AboutLabel::AboutLabel(QWidget *parent)
47 : QTextBrowser(parent)
48 {
49 TRACE_OBJ
50 setFrameStyle(QFrame::NoFrame);
51 QPalette p;
52 p.setColor(QPalette::Base, p.color(QPalette::Window));
53 setPalette(p);
54 }
55
setText(const QString & text,const QByteArray & resources)56 void AboutLabel::setText(const QString &text, const QByteArray &resources)
57 {
58 TRACE_OBJ
59 QDataStream in(resources);
60 in >> m_resourceMap;
61
62 QTextBrowser::setText(text);
63 }
64
minimumSizeHint() const65 QSize AboutLabel::minimumSizeHint() const
66 {
67 TRACE_OBJ
68 QTextDocument *doc = document();
69 doc->adjustSize();
70 return QSize(int(doc->size().width()), int(doc->size().height()));
71 }
72
loadResource(int type,const QUrl & name)73 QVariant AboutLabel::loadResource(int type, const QUrl &name)
74 {
75 TRACE_OBJ
76 if (type == 2 || type == 3) {
77 if (m_resourceMap.contains(name.toString())) {
78 return m_resourceMap.value(name.toString());
79 }
80 }
81 return QVariant();
82 }
83
setSource(const QUrl & url)84 void AboutLabel::setSource(const QUrl &url)
85 {
86 TRACE_OBJ
87 if (url.isValid() && (!HelpViewer::isLocalUrl(url)
88 || !HelpViewer::canOpenPage(url.path()))) {
89 if (!QDesktopServices::openUrl(url)) {
90 QMessageBox::warning(this, tr("Warning"),
91 tr("Unable to launch external application."), tr("OK"));
92 }
93 }
94 }
95
AboutDialog(QWidget * parent)96 AboutDialog::AboutDialog(QWidget *parent)
97 : QDialog(parent, Qt::MSWindowsFixedSizeDialogHint |
98 Qt::WindowTitleHint|Qt::WindowSystemMenuHint)
99 {
100 TRACE_OBJ
101 m_pixmapLabel = nullptr;
102 m_aboutLabel = new AboutLabel();
103
104 m_closeButton = new QPushButton();
105 m_closeButton->setText(tr("&Close"));
106 connect(m_closeButton, &QAbstractButton::clicked, this, &QWidget::close);
107
108 m_layout = new QGridLayout(this);
109 m_layout->addWidget(m_aboutLabel, 1, 0, 1, -1);
110 m_layout->addItem(new QSpacerItem(20, 10, QSizePolicy::Minimum,
111 QSizePolicy::Fixed), 2, 1, 1, 1);
112 m_layout->addItem(new QSpacerItem(20, 20, QSizePolicy::Expanding), 3, 0, 1, 1);
113 m_layout->addWidget(m_closeButton, 3, 1, 1, 1);
114 m_layout->addItem(new QSpacerItem(20, 20, QSizePolicy::Expanding), 3, 2, 1, 1);
115 }
116
setText(const QString & text,const QByteArray & resources)117 void AboutDialog::setText(const QString &text, const QByteArray &resources)
118 {
119 TRACE_OBJ
120 m_aboutLabel->setText(text, resources);
121 updateSize();
122 }
123
setPixmap(const QPixmap & pixmap)124 void AboutDialog::setPixmap(const QPixmap &pixmap)
125 {
126 TRACE_OBJ
127 if (!m_pixmapLabel) {
128 m_pixmapLabel = new QLabel();
129 m_layout->addWidget(m_pixmapLabel, 0, 0, 1, -1, Qt::AlignCenter);
130 }
131 m_pixmapLabel->setPixmap(pixmap);
132 updateSize();
133 }
134
documentTitle() const135 QString AboutDialog::documentTitle() const
136 {
137 TRACE_OBJ
138 return m_aboutLabel->documentTitle();
139 }
140
updateSize()141 void AboutDialog::updateSize()
142 {
143 TRACE_OBJ
144 auto screen = QGuiApplication::screenAt(QCursor::pos());
145 if (!screen)
146 screen = QGuiApplication::primaryScreen();
147 const QSize screenSize = screen->availableSize();
148 int limit = qMin(screenSize.width()/2, 500);
149
150 #ifdef Q_OS_MAC
151 limit = qMin(screenSize.width()/2, 420);
152 #endif
153
154 layout()->activate();
155 int width = layout()->totalMinimumSize().width();
156
157 if (width > limit)
158 width = limit;
159
160 QFontMetrics fm(qApp->font("QWorkspaceTitleBar"));
161 int windowTitleWidth = qMin(fm.horizontalAdvance(windowTitle()) + 50, limit);
162 if (windowTitleWidth > width)
163 width = windowTitleWidth;
164
165 layout()->activate();
166 int height = (layout()->hasHeightForWidth())
167 ? layout()->totalHeightForWidth(width)
168 : layout()->totalMinimumSize().height();
169 setFixedSize(width, height);
170 QCoreApplication::removePostedEvents(this, QEvent::LayoutRequest);
171 }
172
173 QT_END_NAMESPACE
174