/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include "mainwindow.h" #include "tabletcanvas.h" #include #include #include #include #include #include //! [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(action->data())); } //! [2] //! [3] void MainWindow::setLineWidthValuator(QAction *action) { m_canvas->setLineWidthType(qvariant_cast(action->data())); } //! [3] //! [4] void MainWindow::setSaturationValuator(QAction *action) { m_canvas->setColorSaturationValuator(qvariant_cast(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..."), this, &MainWindow::load, QKeySequence::Open); fileMenu->addAction(tr("&Save As..."), this, &MainWindow::save, QKeySequence::SaveAs); fileMenu->addAction(tr("&New"), this, &MainWindow::clear, QKeySequence::New); 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")); //! [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); }