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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "mainwindow.h"
#include "tabletcanvas.h"
#include <QActionGroup>
#include <QApplication>
#include <QColorDialog>
#include <QDir>
#include <QFileDialog>
#include <QMenuBar>
#include <QMessageBox>
//! [0]
MainWindow::MainWindow(TabletCanvas *canvas)
: m_canvas(canvas)
{
createMenus();
setWindowTitle(tr("Tablet Example"));
setCentralWidget(m_canvas);
QCoreApplication::setAttribute(Qt::AA_CompressHighFrequencyEvents);
}
//! [0]
//! [1]
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);
}
//! [1]
//! [2]
void MainWindow::setAlphaValuator(QAction *action)
{
m_canvas->setAlphaChannelValuator(qvariant_cast<TabletCanvas::Valuator>(action->data()));
}
//! [2]
//! [3]
void MainWindow::setLineWidthValuator(QAction *action)
{
m_canvas->setLineWidthType(qvariant_cast<TabletCanvas::Valuator>(action->data()));
}
//! [3]
//! [4]
void MainWindow::setSaturationValuator(QAction *action)
{
m_canvas->setColorSaturationValuator(qvariant_cast<TabletCanvas::Valuator>(action->data()));
}
//! [4]
void MainWindow::setEventCompression(bool compress)
{
QCoreApplication::setAttribute(Qt::AA_CompressTabletEvents, compress);
}
//! [5]
bool MainWindow::save()
{
QString path = QDir::currentPath() + "/untitled.png";
QString fileName = QFileDialog::getSaveFileName(this, tr("Save Picture"),
path);
bool success = m_canvas->saveImage(fileName);
if (!success)
QMessageBox::information(this, "Error Saving Picture",
"Could not save the image");
return success;
}
//! [5]
//! [6]
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");
}
//! [6]
void MainWindow::clear()
{
if (QMessageBox::question(this, tr("Save changes"), tr("Do you want to save your changes?"),
QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel,
QMessageBox::Save) != QMessageBox::Save || save())
m_canvas->clear();
}
//! [7]
void MainWindow::about()
{
QMessageBox::about(this, tr("About Tablet Example"),
tr("This example shows how to use a graphics drawing tablet in Qt."));
}
//! [7]
//! [8]
void MainWindow::createMenus()
{
QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
fileMenu->addAction(tr("&Open..."), QKeySequence::Open, this, &MainWindow::load);
fileMenu->addAction(tr("&Save As..."), QKeySequence::SaveAs, this, &MainWindow::save);
fileMenu->addAction(tr("&New"), QKeySequence::New, this, &MainWindow::clear);
fileMenu->addAction(tr("E&xit"), QKeySequence::Quit, this, &MainWindow::close);
QMenu *brushMenu = menuBar()->addMenu(tr("&Brush"));
brushMenu->addAction(tr("&Brush Color..."), tr("Ctrl+B"), this, &MainWindow::setBrushColor);
//! [8]
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);
//! [9]
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);
//! [9]
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);
QAction *compressAction = tabletMenu->addAction(tr("Co&mpress events"));
compressAction->setCheckable(true);
connect(compressAction, &QAction::toggled, this, &MainWindow::setEventCompression);
QMenu *helpMenu = menuBar()->addMenu("&Help");
helpMenu->addAction(tr("A&bout"), this, &MainWindow::about);
helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
}
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