mainwindow.cpp Example File

widgets/tablet/mainwindow.cpp
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#include <QtWidgets> #include "mainwindow.h" #include "tabletcanvas.h" MainWindow::MainWindow(TabletCanvas *canvas) : m_canvas(canvas), m_colorDialog(Q_NULLPTR) { createMenus(); setWindowTitle(tr("Tablet Example")); setCentralWidget(m_canvas); } void MainWindow::setBrushColor() { if (!m_colorDialog) { m_colorDialog = new QColorDialog(this); m_colorDialog->setModal(false); m_colorDialog->setCurrentColor(m_canvas->color()); connect(m_colorDialog, &QColorDialog::colorSelected, m_canvas, &TabletCanvas::setColor); } m_colorDialog->setVisible(true); } void MainWindow::setAlphaValuator(QAction *action) { m_canvas->setAlphaChannelValuator(action->data().value<TabletCanvas::Valuator>()); } void MainWindow::setLineWidthValuator(QAction *action) { m_canvas->setLineWidthType(action->data().value<TabletCanvas::Valuator>()); } void MainWindow::setSaturationValuator(QAction *action) { m_canvas->setColorSaturationValuator(action->data().value<TabletCanvas::Valuator>()); } void MainWindow::save() { QString path = QDir::currentPath() + "/untitled.png"; QString fileName = QFileDialog::getSaveFileName(this, tr("Save Picture"), path); if (!m_canvas->saveImage(fileName)) QMessageBox::information(this, "Error Saving Picture", "Could not save the image"); } void MainWindow::load() { QString fileName = QFileDialog::getOpenFileName(this, tr("Open Picture"), QDir::currentPath()); if (!m_canvas->loadImage(fileName)) QMessageBox::information(this, "Error Opening Picture", "Could not open picture"); } void MainWindow::about() { QMessageBox::about(this, tr("About Tablet Example"), tr("This example shows how to use a graphics drawing tablet in Qt.")); } void MainWindow::createMenus() { QMenu *fileMenu = menuBar()->addMenu(tr("&File")); fileMenu->addAction(tr("&Open..."), this, &MainWindow::load, QKeySequence::Open); fileMenu->addAction(tr("&Save As..."), this, &MainWindow::save, QKeySequence::SaveAs); fileMenu->addAction(tr("E&xit"), this, &MainWindow::close, QKeySequence::Quit); QMenu *brushMenu = menuBar()->addMenu(tr("&Brush")); brushMenu->addAction(tr("&Brush Color..."), this, &MainWindow::setBrushColor, tr("Ctrl+B")); QMenu *tabletMenu = menuBar()->addMenu(tr("&Tablet")); QMenu *lineWidthMenu = tabletMenu->addMenu(tr("&Line Width")); QAction *lineWidthPressureAction = lineWidthMenu->addAction(tr("&Pressure")); lineWidthPressureAction->setData(TabletCanvas::PressureValuator); lineWidthPressureAction->setCheckable(true); lineWidthPressureAction->setChecked(true); QAction *lineWidthTiltAction = lineWidthMenu->addAction(tr("&Tilt")); lineWidthTiltAction->setData(TabletCanvas::TiltValuator); lineWidthTiltAction->setCheckable(true); QAction *lineWidthFixedAction = lineWidthMenu->addAction(tr("&Fixed")); lineWidthFixedAction->setData(TabletCanvas::NoValuator); lineWidthFixedAction->setCheckable(true); QActionGroup *lineWidthGroup = new QActionGroup(this); lineWidthGroup->addAction(lineWidthPressureAction); lineWidthGroup->addAction(lineWidthTiltAction); lineWidthGroup->addAction(lineWidthFixedAction); connect(lineWidthGroup, &QActionGroup::triggered, this, &MainWindow::setLineWidthValuator); QMenu *alphaChannelMenu = tabletMenu->addMenu(tr("&Alpha Channel")); QAction *alphaChannelPressureAction = alphaChannelMenu->addAction(tr("&Pressure")); alphaChannelPressureAction->setData(TabletCanvas::PressureValuator); alphaChannelPressureAction->setCheckable(true); QAction *alphaChannelTangentialPressureAction = alphaChannelMenu->addAction(tr("T&angential Pressure")); alphaChannelTangentialPressureAction->setData(TabletCanvas::TangentialPressureValuator); alphaChannelTangentialPressureAction->setCheckable(true); alphaChannelTangentialPressureAction->setChecked(true); QAction *alphaChannelTiltAction = alphaChannelMenu->addAction(tr("&Tilt")); alphaChannelTiltAction->setData(TabletCanvas::TiltValuator); alphaChannelTiltAction->setCheckable(true); QAction *noAlphaChannelAction = alphaChannelMenu->addAction(tr("No Alpha Channel")); noAlphaChannelAction->setData(TabletCanvas::NoValuator); noAlphaChannelAction->setCheckable(true); QActionGroup *alphaChannelGroup = new QActionGroup(this); alphaChannelGroup->addAction(alphaChannelPressureAction); alphaChannelGroup->addAction(alphaChannelTangentialPressureAction); alphaChannelGroup->addAction(alphaChannelTiltAction); alphaChannelGroup->addAction(noAlphaChannelAction); connect(alphaChannelGroup, &QActionGroup::triggered, this, &MainWindow::setAlphaValuator); QMenu *colorSaturationMenu = tabletMenu->addMenu(tr("&Color Saturation")); QAction *colorSaturationVTiltAction = colorSaturationMenu->addAction(tr("&Vertical Tilt")); colorSaturationVTiltAction->setData(TabletCanvas::VTiltValuator); colorSaturationVTiltAction->setCheckable(true); QAction *colorSaturationHTiltAction = colorSaturationMenu->addAction(tr("&Horizontal Tilt")); colorSaturationHTiltAction->setData(TabletCanvas::HTiltValuator); colorSaturationHTiltAction->setCheckable(true); QAction *colorSaturationPressureAction = colorSaturationMenu->addAction(tr("&Pressure")); colorSaturationPressureAction->setData(TabletCanvas::PressureValuator); colorSaturationPressureAction->setCheckable(true); QAction *noColorSaturationAction = colorSaturationMenu->addAction(tr("&No Color Saturation")); noColorSaturationAction->setData(TabletCanvas::NoValuator); noColorSaturationAction->setCheckable(true); noColorSaturationAction->setChecked(true); QActionGroup *colorSaturationGroup = new QActionGroup(this); colorSaturationGroup->addAction(colorSaturationVTiltAction); colorSaturationGroup->addAction(colorSaturationHTiltAction); colorSaturationGroup->addAction(colorSaturationPressureAction); colorSaturationGroup->addAction(noColorSaturationAction); connect(colorSaturationGroup, &QActionGroup::triggered, this, &MainWindow::setSaturationValuator); QMenu *helpMenu = menuBar()->addMenu("&Help"); helpMenu->addAction(tr("A&bout"), this, &MainWindow::about); helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt); }