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 demonstration applications of the Qt Toolkit. |
7 | ** |
8 | ** $QT_BEGIN_LICENSE:BSD$ |
9 | ** Commercial License Usage |
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17 | ** BSD License Usage |
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46 | ** |
47 | ** $QT_END_LICENSE$ |
48 | ** |
49 | ****************************************************************************/ |
50 | |
51 | #include "view.h" |
52 | |
53 | #if defined(QT_PRINTSUPPORT_LIB) |
54 | #include <QtPrintSupport/qtprintsupportglobal.h> |
55 | #if QT_CONFIG(printdialog) |
56 | #include <QPrinter> |
57 | #include <QPrintDialog> |
58 | #endif |
59 | #endif |
60 | #include <QtWidgets> |
61 | #include <QtMath> |
62 | |
63 | #if QT_CONFIG(wheelevent) |
64 | void GraphicsView::wheelEvent(QWheelEvent *e) |
65 | { |
66 | if (e->modifiers() & Qt::ControlModifier) { |
67 | if (e->angleDelta().y() > 0) |
68 | view->zoomIn(6); |
69 | else |
70 | view->zoomOut(6); |
71 | e->accept(); |
72 | } else { |
73 | QGraphicsView::wheelEvent(e); |
74 | } |
75 | } |
76 | #endif |
77 | |
78 | View::View(const QString &name, QWidget *parent) |
79 | : QFrame(parent) |
80 | { |
81 | setFrameStyle(Sunken | StyledPanel); |
82 | graphicsView = new GraphicsView(this); |
83 | graphicsView->setRenderHint(QPainter::Antialiasing, false); |
84 | graphicsView->setDragMode(QGraphicsView::RubberBandDrag); |
85 | graphicsView->setOptimizationFlags(QGraphicsView::DontSavePainterState); |
86 | graphicsView->setViewportUpdateMode(QGraphicsView::SmartViewportUpdate); |
87 | graphicsView->setTransformationAnchor(QGraphicsView::AnchorUnderMouse); |
88 | |
89 | int size = style()->pixelMetric(QStyle::PM_ToolBarIconSize); |
90 | QSize iconSize(size, size); |
91 | |
92 | QToolButton *zoomInIcon = new QToolButton; |
93 | zoomInIcon->setAutoRepeat(true); |
94 | zoomInIcon->setAutoRepeatInterval(33); |
95 | zoomInIcon->setAutoRepeatDelay(0); |
96 | zoomInIcon->setIcon(QPixmap(":/zoomin.png" )); |
97 | zoomInIcon->setIconSize(iconSize); |
98 | QToolButton *zoomOutIcon = new QToolButton; |
99 | zoomOutIcon->setAutoRepeat(true); |
100 | zoomOutIcon->setAutoRepeatInterval(33); |
101 | zoomOutIcon->setAutoRepeatDelay(0); |
102 | zoomOutIcon->setIcon(QPixmap(":/zoomout.png" )); |
103 | zoomOutIcon->setIconSize(iconSize); |
104 | zoomSlider = new QSlider; |
105 | zoomSlider->setMinimum(0); |
106 | zoomSlider->setMaximum(500); |
107 | zoomSlider->setValue(250); |
108 | zoomSlider->setTickPosition(QSlider::TicksRight); |
109 | |
110 | // Zoom slider layout |
111 | QVBoxLayout *zoomSliderLayout = new QVBoxLayout; |
112 | zoomSliderLayout->addWidget(zoomInIcon); |
113 | zoomSliderLayout->addWidget(zoomSlider); |
114 | zoomSliderLayout->addWidget(zoomOutIcon); |
115 | |
116 | QToolButton *rotateLeftIcon = new QToolButton; |
117 | rotateLeftIcon->setIcon(QPixmap(":/rotateleft.png" )); |
118 | rotateLeftIcon->setIconSize(iconSize); |
119 | QToolButton *rotateRightIcon = new QToolButton; |
120 | rotateRightIcon->setIcon(QPixmap(":/rotateright.png" )); |
121 | rotateRightIcon->setIconSize(iconSize); |
122 | rotateSlider = new QSlider; |
123 | rotateSlider->setOrientation(Qt::Horizontal); |
124 | rotateSlider->setMinimum(-360); |
125 | rotateSlider->setMaximum(360); |
126 | rotateSlider->setValue(0); |
127 | rotateSlider->setTickPosition(QSlider::TicksBelow); |
128 | |
129 | // Rotate slider layout |
130 | QHBoxLayout *rotateSliderLayout = new QHBoxLayout; |
131 | rotateSliderLayout->addWidget(rotateLeftIcon); |
132 | rotateSliderLayout->addWidget(rotateSlider); |
133 | rotateSliderLayout->addWidget(rotateRightIcon); |
134 | |
135 | resetButton = new QToolButton; |
136 | resetButton->setText(tr("0" )); |
137 | resetButton->setEnabled(false); |
138 | |
139 | // Label layout |
140 | QHBoxLayout *labelLayout = new QHBoxLayout; |
141 | label = new QLabel(name); |
142 | label2 = new QLabel(tr("Pointer Mode" )); |
143 | selectModeButton = new QToolButton; |
144 | selectModeButton->setText(tr("Select" )); |
145 | selectModeButton->setCheckable(true); |
146 | selectModeButton->setChecked(true); |
147 | dragModeButton = new QToolButton; |
148 | dragModeButton->setText(tr("Drag" )); |
149 | dragModeButton->setCheckable(true); |
150 | dragModeButton->setChecked(false); |
151 | antialiasButton = new QToolButton; |
152 | antialiasButton->setText(tr("Antialiasing" )); |
153 | antialiasButton->setCheckable(true); |
154 | antialiasButton->setChecked(false); |
155 | printButton = new QToolButton; |
156 | printButton->setIcon(QIcon(QPixmap(":/fileprint.png" ))); |
157 | |
158 | QButtonGroup *pointerModeGroup = new QButtonGroup(this); |
159 | pointerModeGroup->setExclusive(true); |
160 | pointerModeGroup->addButton(selectModeButton); |
161 | pointerModeGroup->addButton(dragModeButton); |
162 | |
163 | labelLayout->addWidget(label); |
164 | labelLayout->addStretch(); |
165 | labelLayout->addWidget(label2); |
166 | labelLayout->addWidget(selectModeButton); |
167 | labelLayout->addWidget(dragModeButton); |
168 | labelLayout->addStretch(); |
169 | labelLayout->addWidget(antialiasButton); |
170 | labelLayout->addWidget(printButton); |
171 | |
172 | QGridLayout *topLayout = new QGridLayout; |
173 | topLayout->addLayout(labelLayout, 0, 0); |
174 | topLayout->addWidget(graphicsView, 1, 0); |
175 | topLayout->addLayout(zoomSliderLayout, 1, 1); |
176 | topLayout->addLayout(rotateSliderLayout, 2, 0); |
177 | topLayout->addWidget(resetButton, 2, 1); |
178 | setLayout(topLayout); |
179 | |
180 | connect(resetButton, &QAbstractButton::clicked, this, &View::resetView); |
181 | connect(zoomSlider, &QAbstractSlider::valueChanged, this, &View::setupMatrix); |
182 | connect(rotateSlider, &QAbstractSlider::valueChanged, this, &View::setupMatrix); |
183 | connect(graphicsView->verticalScrollBar(), &QAbstractSlider::valueChanged, |
184 | this, &View::setResetButtonEnabled); |
185 | connect(graphicsView->horizontalScrollBar(), &QAbstractSlider::valueChanged, |
186 | this, &View::setResetButtonEnabled); |
187 | connect(selectModeButton, &QAbstractButton::toggled, this, &View::togglePointerMode); |
188 | connect(dragModeButton, &QAbstractButton::toggled, this, &View::togglePointerMode); |
189 | connect(antialiasButton, &QAbstractButton::toggled, this, &View::toggleAntialiasing); |
190 | connect(rotateLeftIcon, &QAbstractButton::clicked, this, &View::rotateLeft); |
191 | connect(rotateRightIcon, &QAbstractButton::clicked, this, &View::rotateRight); |
192 | connect(zoomInIcon, &QAbstractButton::clicked, this, &View::zoomIn); |
193 | connect(zoomOutIcon, &QAbstractButton::clicked, this, &View::zoomOut); |
194 | connect(printButton, &QAbstractButton::clicked, this, &View::print); |
195 | |
196 | setupMatrix(); |
197 | } |
198 | |
199 | QGraphicsView *View::view() const |
200 | { |
201 | return static_cast<QGraphicsView *>(graphicsView); |
202 | } |
203 | |
204 | void View::resetView() |
205 | { |
206 | zoomSlider->setValue(250); |
207 | rotateSlider->setValue(0); |
208 | setupMatrix(); |
209 | graphicsView->ensureVisible(QRectF(0, 0, 0, 0)); |
210 | |
211 | resetButton->setEnabled(false); |
212 | } |
213 | |
214 | void View::setResetButtonEnabled() |
215 | { |
216 | resetButton->setEnabled(true); |
217 | } |
218 | |
219 | void View::setupMatrix() |
220 | { |
221 | qreal scale = qPow(qreal(2), (zoomSlider->value() - 250) / qreal(50)); |
222 | |
223 | QTransform matrix; |
224 | matrix.scale(scale, scale); |
225 | matrix.rotate(rotateSlider->value()); |
226 | |
227 | graphicsView->setTransform(matrix); |
228 | setResetButtonEnabled(); |
229 | } |
230 | |
231 | void View::togglePointerMode() |
232 | { |
233 | graphicsView->setDragMode(selectModeButton->isChecked() |
234 | ? QGraphicsView::RubberBandDrag |
235 | : QGraphicsView::ScrollHandDrag); |
236 | graphicsView->setInteractive(selectModeButton->isChecked()); |
237 | } |
238 | |
239 | void View::toggleAntialiasing() |
240 | { |
241 | graphicsView->setRenderHint(QPainter::Antialiasing, antialiasButton->isChecked()); |
242 | } |
243 | |
244 | void View::print() |
245 | { |
246 | #if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printdialog) |
247 | QPrinter printer; |
248 | QPrintDialog dialog(&printer, this); |
249 | if (dialog.exec() == QDialog::Accepted) { |
250 | QPainter painter(&printer); |
251 | graphicsView->render(&painter); |
252 | } |
253 | #endif |
254 | } |
255 | |
256 | void View::zoomIn(int level) |
257 | { |
258 | zoomSlider->setValue(zoomSlider->value() + level); |
259 | } |
260 | |
261 | void View::zoomOut(int level) |
262 | { |
263 | zoomSlider->setValue(zoomSlider->value() - level); |
264 | } |
265 | |
266 | void View::rotateLeft() |
267 | { |
268 | rotateSlider->setValue(rotateSlider->value() - 10); |
269 | } |
270 | |
271 | void View::rotateRight() |
272 | { |
273 | rotateSlider->setValue(rotateSlider->value() + 10); |
274 | } |
275 | |