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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "view.h"
#include <QtGui>
#include "valgrind/callgrind.h"
#ifndef QT_NO_OPENGL
#include <QtOpenGL>
#endif
#include <qmath.h>
class CountView : public QGraphicsView
{
protected:
void paintEvent(QPaintEvent *event)
{
static int n = 0;
if (n)
CALLGRIND_START_INSTRUMENTATION
QGraphicsView::paintEvent(event);
if (n)
CALLGRIND_STOP_INSTRUMENTATION
if (++n == 500)
qApp->quit();
}
};
View::View(const QString &name, QWidget *parent)
: QFrame(parent)
{
setFrameStyle(Sunken | StyledPanel);
graphicsView = new CountView;
graphicsView->setRenderHint(QPainter::Antialiasing, false);
graphicsView->setDragMode(QGraphicsView::RubberBandDrag);
graphicsView->setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);
int size = style()->pixelMetric(QStyle::PM_ToolBarIconSize);
QSize iconSize(size, size);
QToolButton *zoomInIcon = new QToolButton;
zoomInIcon->setAutoRepeat(true);
zoomInIcon->setAutoRepeatInterval(33);
zoomInIcon->setAutoRepeatDelay(0);
zoomInIcon->setIcon(QPixmap(":/zoomin.png"));
zoomInIcon->setIconSize(iconSize);
QToolButton *zoomOutIcon = new QToolButton;
zoomOutIcon->setAutoRepeat(true);
zoomOutIcon->setAutoRepeatInterval(33);
zoomOutIcon->setAutoRepeatDelay(0);
zoomOutIcon->setIcon(QPixmap(":/zoomout.png"));
zoomOutIcon->setIconSize(iconSize);
zoomSlider = new QSlider;
zoomSlider->setMinimum(0);
zoomSlider->setMaximum(500);
zoomSlider->setValue(250);
zoomSlider->setTickPosition(QSlider::TicksRight);
// Zoom slider layout
QVBoxLayout *zoomSliderLayout = new QVBoxLayout;
zoomSliderLayout->addWidget(zoomInIcon);
zoomSliderLayout->addWidget(zoomSlider);
zoomSliderLayout->addWidget(zoomOutIcon);
QToolButton *rotateLeftIcon = new QToolButton;
rotateLeftIcon->setIcon(QPixmap(":/rotateleft.png"));
rotateLeftIcon->setIconSize(iconSize);
QToolButton *rotateRightIcon = new QToolButton;
rotateRightIcon->setIcon(QPixmap(":/rotateright.png"));
rotateRightIcon->setIconSize(iconSize);
rotateSlider = new QSlider;
rotateSlider->setOrientation(Qt::Horizontal);
rotateSlider->setMinimum(-360);
rotateSlider->setMaximum(360);
rotateSlider->setValue(0);
rotateSlider->setTickPosition(QSlider::TicksBelow);
// Rotate slider layout
QHBoxLayout *rotateSliderLayout = new QHBoxLayout;
rotateSliderLayout->addWidget(rotateLeftIcon);
rotateSliderLayout->addWidget(rotateSlider);
rotateSliderLayout->addWidget(rotateRightIcon);
resetButton = new QToolButton;
resetButton->setText(tr("0"));
resetButton->setEnabled(false);
// Label layout
QHBoxLayout *labelLayout = new QHBoxLayout;
label = new QLabel(name);
antialiasButton = new QToolButton;
antialiasButton->setText(tr("Antialiasing"));
antialiasButton->setCheckable(true);
antialiasButton->setChecked(false);
openGlButton = new QToolButton;
openGlButton->setText(tr("OpenGL"));
openGlButton->setCheckable(true);
#ifndef QT_NO_OPENGL
openGlButton->setEnabled(QGLFormat::hasOpenGL());
#else
openGlButton->setEnabled(false);
#endif
printButton = new QToolButton;
printButton->setIcon(QIcon(QPixmap(":/fileprint.png")));
labelLayout->addWidget(label);
labelLayout->addStretch();
labelLayout->addWidget(antialiasButton);
labelLayout->addWidget(openGlButton);
labelLayout->addWidget(printButton);
QGridLayout *topLayout = new QGridLayout;
topLayout->addLayout(labelLayout, 0, 0);
topLayout->addWidget(graphicsView, 1, 0);
topLayout->addLayout(zoomSliderLayout, 1, 1);
topLayout->addLayout(rotateSliderLayout, 2, 0);
topLayout->addWidget(resetButton, 2, 1);
setLayout(topLayout);
connect(resetButton, SIGNAL(clicked()), this, SLOT(resetView()));
connect(zoomSlider, SIGNAL(valueChanged(int)), this, SLOT(setupMatrix()));
connect(rotateSlider, SIGNAL(valueChanged(int)), this, SLOT(setupMatrix()));
connect(graphicsView->verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(setResetButtonEnabled()));
connect(graphicsView->horizontalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(setResetButtonEnabled()));
connect(antialiasButton, SIGNAL(toggled(bool)), this, SLOT(toggleAntialiasing()));
connect(openGlButton, SIGNAL(toggled(bool)), this, SLOT(toggleOpenGL()));
connect(rotateLeftIcon, SIGNAL(clicked()), this, SLOT(rotateLeft()));
connect(rotateRightIcon, SIGNAL(clicked()), this, SLOT(rotateRight()));
connect(zoomInIcon, SIGNAL(clicked()), this, SLOT(zoomIn()));
connect(zoomOutIcon, SIGNAL(clicked()), this, SLOT(zoomOut()));
connect(printButton, SIGNAL(clicked()), this, SLOT(print()));
setupMatrix();
startTimer(0);
}
QGraphicsView *View::view() const
{
return graphicsView;
}
void View::resetView()
{
zoomSlider->setValue(250);
rotateSlider->setValue(0);
setupMatrix();
graphicsView->ensureVisible(QRectF(0, 0, 0, 0));
resetButton->setEnabled(false);
}
void View::setResetButtonEnabled()
{
resetButton->setEnabled(true);
}
void View::setupMatrix()
{
qreal scale = qPow(qreal(2), (zoomSlider->value() - 250) / qreal(50));
QTransform matrix;
matrix.scale(scale, scale);
matrix.rotate(rotateSlider->value());
graphicsView->setMatrix(matrix);
setResetButtonEnabled();
}
void View::toggleOpenGL()
{
#ifndef QT_NO_OPENGL
graphicsView->setViewport(openGlButton->isChecked() ? new QGLWidget(QGLFormat(QGL::SampleBuffers)) : new QWidget);
#endif
}
void View::toggleAntialiasing()
{
graphicsView->setRenderHint(QPainter::Antialiasing, antialiasButton->isChecked());
}
void View::print()
{
#ifndef QT_NO_PRINTER
QPrinter printer;
QPrintDialog dialog(&printer, this);
if (dialog.exec() == QDialog::Accepted) {
QPainter painter(&printer);
graphicsView->render(&painter);
}
#endif
}
void View::zoomIn()
{
zoomSlider->setValue(zoomSlider->value() + 1);
}
void View::zoomOut()
{
zoomSlider->setValue(zoomSlider->value() - 1);
}
void View::rotateLeft()
{
rotateSlider->setValue(rotateSlider->value() - 10);
}
void View::rotateRight()
{
rotateSlider->setValue(rotateSlider->value() + 10);
}
void View::timerEvent(QTimerEvent *)
{
graphicsView->horizontalScrollBar()->setValue(graphicsView->horizontalScrollBar()->value() + 1);
}
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