mainwindow.cpp Example File

widgets/tablet/mainwindow.cpp
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** Copyright (C) 2015 The Qt Company Ltd.
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#include <QtGui>

#include "mainwindow.h"
#include "tabletcanvas.h"

MainWindow::MainWindow(TabletCanvas *canvas)
{
    myCanvas = canvas;
    createActions();
    createMenus();

    myCanvas->setColor(Qt::red);
    myCanvas->setLineWidthType(TabletCanvas::LineWidthPressure);
    myCanvas->setAlphaChannelType(TabletCanvas::NoAlpha);
    myCanvas->setColorSaturationType(TabletCanvas::NoSaturation);

    setWindowTitle(tr("Tablet Example"));
    setCentralWidget(myCanvas);
}

void MainWindow::brushColorAct()
{
    QColor color = QColorDialog::getColor(myCanvas->color());

    if (color.isValid())
        myCanvas->setColor(color);
}

void MainWindow::alphaActionTriggered(QAction *action)
{
    if (action == alphaChannelPressureAction) {
        myCanvas->setAlphaChannelType(TabletCanvas::AlphaPressure);
    } else if (action == alphaChannelTiltAction) {
        myCanvas->setAlphaChannelType(TabletCanvas::AlphaTilt);
    } else {
        myCanvas->setAlphaChannelType(TabletCanvas::NoAlpha);
    }
}

void MainWindow::lineWidthActionTriggered(QAction *action)
{
    if (action == lineWidthPressureAction) {
        myCanvas->setLineWidthType(TabletCanvas::LineWidthPressure);
    } else if (action == lineWidthTiltAction) {
        myCanvas->setLineWidthType(TabletCanvas::LineWidthTilt);
    } else {
        myCanvas->setLineWidthType(TabletCanvas::NoLineWidth);
    }
}

void MainWindow::saturationActionTriggered(QAction *action)
{
    if (action == colorSaturationVTiltAction) {
        myCanvas->setColorSaturationType(TabletCanvas::SaturationVTilt);
    } else if (action == colorSaturationHTiltAction) {
        myCanvas->setColorSaturationType(TabletCanvas::SaturationHTilt);
    } else if (action == colorSaturationPressureAction) {
        myCanvas->setColorSaturationType(TabletCanvas::SaturationPressure);
    } else {
        myCanvas->setColorSaturationType(TabletCanvas::NoSaturation);
    }
}

void MainWindow::saveAct()
{
    QString path = QDir::currentPath() + "/untitled.png";
    QString fileName = QFileDialog::getSaveFileName(this, tr("Save Picture"),
                             path);

    if (!myCanvas->saveImage(fileName))
        QMessageBox::information(this, "Error Saving Picture",
                                 "Could not save the image");
}

void MainWindow::loadAct()
{
    QString fileName = QFileDialog::getOpenFileName(this, tr("Open Picture"),
                                                    QDir::currentPath());

    if (!myCanvas->loadImage(fileName))
        QMessageBox::information(this, "Error Opening Picture",
                                 "Could not open picture");
}

void MainWindow::aboutAct()
{
    QMessageBox::about(this, tr("About Tablet Example"),
                       tr("This example shows use of a Wacom tablet in Qt"));
}

void MainWindow::createActions()
{
    brushColorAction = new QAction(tr("&Brush Color..."), this);
    brushColorAction->setShortcut(tr("Ctrl+C"));
    connect(brushColorAction, SIGNAL(triggered()),
            this, SLOT(brushColorAct()));

    alphaChannelPressureAction = new QAction(tr("&Pressure"), this);
    alphaChannelPressureAction->setCheckable(true);

    alphaChannelTiltAction = new QAction(tr("&Tilt"), this);
    alphaChannelTiltAction->setCheckable(true);

    noAlphaChannelAction = new QAction(tr("No Alpha Channel"), this);
    noAlphaChannelAction->setCheckable(true);
    noAlphaChannelAction->setChecked(true);

    alphaChannelGroup = new QActionGroup(this);
    alphaChannelGroup->addAction(alphaChannelPressureAction);
    alphaChannelGroup->addAction(alphaChannelTiltAction);
    alphaChannelGroup->addAction(noAlphaChannelAction);
    connect(alphaChannelGroup, SIGNAL(triggered(QAction*)),
            this, SLOT(alphaActionTriggered(QAction*)));

    colorSaturationVTiltAction = new QAction(tr("&Vertical Tilt"), this);
    colorSaturationVTiltAction->setCheckable(true);

    colorSaturationHTiltAction = new QAction(tr("&Horizontal Tilt"), this);
    colorSaturationHTiltAction->setCheckable(true);

    colorSaturationPressureAction = new QAction(tr("&Pressure"), this);
    colorSaturationPressureAction->setCheckable(true);

    noColorSaturationAction = new QAction(tr("&No Color Saturation"), this);
    noColorSaturationAction->setCheckable(true);
    noColorSaturationAction->setChecked(true);

    colorSaturationGroup = new QActionGroup(this);
    colorSaturationGroup->addAction(colorSaturationVTiltAction);
    colorSaturationGroup->addAction(colorSaturationHTiltAction);
    colorSaturationGroup->addAction(colorSaturationPressureAction);
    colorSaturationGroup->addAction(noColorSaturationAction);
    connect(colorSaturationGroup, SIGNAL(triggered(QAction*)),
            this, SLOT(saturationActionTriggered(QAction*)));

    lineWidthPressureAction = new QAction(tr("&Pressure"), this);
    lineWidthPressureAction->setCheckable(true);
    lineWidthPressureAction->setChecked(true);

    lineWidthTiltAction = new QAction(tr("&Tilt"), this);
    lineWidthTiltAction->setCheckable(true);

    lineWidthFixedAction = new QAction(tr("&Fixed"), this);
    lineWidthFixedAction->setCheckable(true);

    lineWidthGroup = new QActionGroup(this);
    lineWidthGroup->addAction(lineWidthPressureAction);
    lineWidthGroup->addAction(lineWidthTiltAction);
    lineWidthGroup->addAction(lineWidthFixedAction);
    connect(lineWidthGroup, SIGNAL(triggered(QAction*)),
            this, SLOT(lineWidthActionTriggered(QAction*)));

    exitAction = new QAction(tr("E&xit"), this);
    exitAction->setShortcuts(QKeySequence::Quit);
    connect(exitAction, SIGNAL(triggered()),
            this, SLOT(close()));

    loadAction = new QAction(tr("&Open..."), this);
    loadAction->setShortcuts(QKeySequence::Open);
    connect(loadAction, SIGNAL(triggered()),
            this, SLOT(loadAct()));

    saveAction = new QAction(tr("&Save As..."), this);
    saveAction->setShortcuts(QKeySequence::SaveAs);
    connect(saveAction, SIGNAL(triggered()),
            this, SLOT(saveAct()));

    aboutAction = new QAction(tr("A&bout"), this);
    aboutAction->setShortcut(tr("Ctrl+B"));
    connect(aboutAction, SIGNAL(triggered()),
            this, SLOT(aboutAct()));

    aboutQtAction = new QAction(tr("About &Qt"), this);
    aboutQtAction->setShortcut(tr("Ctrl+Q"));
    connect(aboutQtAction, SIGNAL(triggered()),
            qApp, SLOT(aboutQt()));
}

void MainWindow::createMenus()
{
    fileMenu = menuBar()->addMenu(tr("&File"));
    fileMenu->addAction(loadAction);
    fileMenu->addAction(saveAction);
    fileMenu->addSeparator();
    fileMenu->addAction(exitAction);

    brushMenu = menuBar()->addMenu(tr("&Brush"));
    brushMenu->addAction(brushColorAction);

    tabletMenu = menuBar()->addMenu(tr("&Tablet"));

    lineWidthMenu = tabletMenu->addMenu(tr("&Line Width"));
    lineWidthMenu->addAction(lineWidthPressureAction);
    lineWidthMenu->addAction(lineWidthTiltAction);
    lineWidthMenu->addAction(lineWidthFixedAction);

    alphaChannelMenu = tabletMenu->addMenu(tr("&Alpha Channel"));
    alphaChannelMenu->addAction(alphaChannelPressureAction);
    alphaChannelMenu->addAction(alphaChannelTiltAction);
    alphaChannelMenu->addAction(noAlphaChannelAction);

    colorSaturationMenu = tabletMenu->addMenu(tr("&Color Saturation"));
    colorSaturationMenu->addAction(colorSaturationVTiltAction);
    colorSaturationMenu->addAction(colorSaturationHTiltAction);
    colorSaturationMenu->addAction(noColorSaturationAction);

    helpMenu = menuBar()->addMenu("&Help");
    helpMenu->addAction(aboutAction);
    helpMenu->addAction(aboutQtAction);
}

© 2016 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.