qt6windows7/examples/widgets/graphicsview/chip/view.cpp
2023-10-29 23:33:08 +01:00

238 lines
7.5 KiB
C++

// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "view.h"
#if defined(QT_PRINTSUPPORT_LIB)
#include <QtPrintSupport/qtprintsupportglobal.h>
#if QT_CONFIG(printdialog)
#include <QPrinter>
#include <QPrintDialog>
#endif
#endif
#include <QtWidgets>
#include <QtMath>
#if QT_CONFIG(wheelevent)
void GraphicsView::wheelEvent(QWheelEvent *e)
{
if (e->modifiers() & Qt::ControlModifier) {
if (e->angleDelta().y() > 0)
view->zoomInBy(6);
else
view->zoomOutBy(6);
e->accept();
} else {
QGraphicsView::wheelEvent(e);
}
}
#endif
View::View(const QString &name, QWidget *parent)
: QFrame(parent)
{
setFrameStyle(Sunken | StyledPanel);
graphicsView = new GraphicsView(this);
graphicsView->setRenderHint(QPainter::Antialiasing, false);
graphicsView->setDragMode(QGraphicsView::RubberBandDrag);
graphicsView->setOptimizationFlags(QGraphicsView::DontSavePainterState);
graphicsView->setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);
graphicsView->setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
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);
label2 = new QLabel(tr("Pointer Mode"));
selectModeButton = new QToolButton;
selectModeButton->setText(tr("Select"));
selectModeButton->setCheckable(true);
selectModeButton->setChecked(true);
dragModeButton = new QToolButton;
dragModeButton->setText(tr("Drag"));
dragModeButton->setCheckable(true);
dragModeButton->setChecked(false);
antialiasButton = new QToolButton;
antialiasButton->setText(tr("Antialiasing"));
antialiasButton->setCheckable(true);
antialiasButton->setChecked(false);
printButton = new QToolButton;
printButton->setIcon(QIcon(QPixmap(":/fileprint.png")));
QButtonGroup *pointerModeGroup = new QButtonGroup(this);
pointerModeGroup->setExclusive(true);
pointerModeGroup->addButton(selectModeButton);
pointerModeGroup->addButton(dragModeButton);
labelLayout->addWidget(label);
labelLayout->addStretch();
labelLayout->addWidget(label2);
labelLayout->addWidget(selectModeButton);
labelLayout->addWidget(dragModeButton);
labelLayout->addStretch();
labelLayout->addWidget(antialiasButton);
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, &QAbstractButton::clicked, this, &View::resetView);
connect(zoomSlider, &QAbstractSlider::valueChanged, this, &View::setupMatrix);
connect(rotateSlider, &QAbstractSlider::valueChanged, this, &View::setupMatrix);
connect(graphicsView->verticalScrollBar(), &QAbstractSlider::valueChanged,
this, &View::setResetButtonEnabled);
connect(graphicsView->horizontalScrollBar(), &QAbstractSlider::valueChanged,
this, &View::setResetButtonEnabled);
connect(selectModeButton, &QAbstractButton::toggled, this, &View::togglePointerMode);
connect(dragModeButton, &QAbstractButton::toggled, this, &View::togglePointerMode);
connect(antialiasButton, &QAbstractButton::toggled, this, &View::toggleAntialiasing);
connect(rotateLeftIcon, &QAbstractButton::clicked, this, &View::rotateLeft);
connect(rotateRightIcon, &QAbstractButton::clicked, this, &View::rotateRight);
connect(zoomInIcon, &QAbstractButton::clicked, this, &View::zoomIn);
connect(zoomOutIcon, &QAbstractButton::clicked, this, &View::zoomOut);
connect(printButton, &QAbstractButton::clicked, this, &View::print);
setupMatrix();
}
QGraphicsView *View::view() const
{
return static_cast<QGraphicsView *>(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->setTransform(matrix);
setResetButtonEnabled();
}
void View::togglePointerMode()
{
graphicsView->setDragMode(selectModeButton->isChecked()
? QGraphicsView::RubberBandDrag
: QGraphicsView::ScrollHandDrag);
graphicsView->setInteractive(selectModeButton->isChecked());
}
void View::toggleAntialiasing()
{
graphicsView->setRenderHint(QPainter::Antialiasing, antialiasButton->isChecked());
}
void View::print()
{
#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printdialog)
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::zoomInBy(int level)
{
zoomSlider->setValue(zoomSlider->value() + level);
}
void View::zoomOutBy(int level)
{
zoomSlider->setValue(zoomSlider->value() - level);
}
void View::rotateLeft()
{
rotateSlider->setValue(rotateSlider->value() - 10);
}
void View::rotateRight()
{
rotateSlider->setValue(rotateSlider->value() + 10);
}