252 lines
9.9 KiB
C++
252 lines
9.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "mainwindow.h"
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#include "tabletcanvas.h"
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#include <QApplication>
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#include <QColorDialog>
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#include <QDir>
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#include <QFileDialog>
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#include <QMenuBar>
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#include <QMessageBox>
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//! [0]
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MainWindow::MainWindow(TabletCanvas *canvas)
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: m_canvas(canvas)
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{
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createMenus();
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setWindowTitle(tr("Tablet Example"));
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setCentralWidget(m_canvas);
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QCoreApplication::setAttribute(Qt::AA_CompressHighFrequencyEvents);
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}
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//! [0]
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//! [1]
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void MainWindow::setBrushColor()
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{
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if (!m_colorDialog) {
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m_colorDialog = new QColorDialog(this);
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m_colorDialog->setModal(false);
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m_colorDialog->setCurrentColor(m_canvas->color());
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connect(m_colorDialog, &QColorDialog::colorSelected, m_canvas, &TabletCanvas::setColor);
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}
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m_colorDialog->setVisible(true);
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}
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//! [1]
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//! [2]
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void MainWindow::setAlphaValuator(QAction *action)
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{
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m_canvas->setAlphaChannelValuator(qvariant_cast<TabletCanvas::Valuator>(action->data()));
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}
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//! [2]
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//! [3]
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void MainWindow::setLineWidthValuator(QAction *action)
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{
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m_canvas->setLineWidthType(qvariant_cast<TabletCanvas::Valuator>(action->data()));
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}
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//! [3]
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//! [4]
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void MainWindow::setSaturationValuator(QAction *action)
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{
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m_canvas->setColorSaturationValuator(qvariant_cast<TabletCanvas::Valuator>(action->data()));
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}
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//! [4]
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void MainWindow::setEventCompression(bool compress)
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{
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QCoreApplication::setAttribute(Qt::AA_CompressTabletEvents, compress);
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}
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//! [5]
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bool MainWindow::save()
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{
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QString path = QDir::currentPath() + "/untitled.png";
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QString fileName = QFileDialog::getSaveFileName(this, tr("Save Picture"),
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path);
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bool success = m_canvas->saveImage(fileName);
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if (!success)
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QMessageBox::information(this, "Error Saving Picture",
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"Could not save the image");
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return success;
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}
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//! [5]
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//! [6]
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void MainWindow::load()
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{
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QString fileName = QFileDialog::getOpenFileName(this, tr("Open Picture"),
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QDir::currentPath());
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if (!m_canvas->loadImage(fileName))
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QMessageBox::information(this, "Error Opening Picture",
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"Could not open picture");
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}
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//! [6]
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void MainWindow::clear()
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{
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if (QMessageBox::question(this, tr("Save changes"), tr("Do you want to save your changes?"),
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QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel,
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QMessageBox::Save) != QMessageBox::Save || save())
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m_canvas->clear();
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}
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//! [7]
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void MainWindow::about()
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{
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QMessageBox::about(this, tr("About Tablet Example"),
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tr("This example shows how to use a graphics drawing tablet in Qt."));
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}
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//! [7]
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//! [8]
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void MainWindow::createMenus()
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{
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QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
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fileMenu->addAction(tr("&Open..."), this, &MainWindow::load, QKeySequence::Open);
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fileMenu->addAction(tr("&Save As..."), this, &MainWindow::save, QKeySequence::SaveAs);
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fileMenu->addAction(tr("&New"), this, &MainWindow::clear, QKeySequence::New);
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fileMenu->addAction(tr("E&xit"), this, &MainWindow::close, QKeySequence::Quit);
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QMenu *brushMenu = menuBar()->addMenu(tr("&Brush"));
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brushMenu->addAction(tr("&Brush Color..."), this, &MainWindow::setBrushColor, tr("Ctrl+B"));
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//! [8]
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QMenu *tabletMenu = menuBar()->addMenu(tr("&Tablet"));
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QMenu *lineWidthMenu = tabletMenu->addMenu(tr("&Line Width"));
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QAction *lineWidthPressureAction = lineWidthMenu->addAction(tr("&Pressure"));
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lineWidthPressureAction->setData(TabletCanvas::PressureValuator);
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lineWidthPressureAction->setCheckable(true);
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lineWidthPressureAction->setChecked(true);
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QAction *lineWidthTiltAction = lineWidthMenu->addAction(tr("&Tilt"));
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lineWidthTiltAction->setData(TabletCanvas::TiltValuator);
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lineWidthTiltAction->setCheckable(true);
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QAction *lineWidthFixedAction = lineWidthMenu->addAction(tr("&Fixed"));
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lineWidthFixedAction->setData(TabletCanvas::NoValuator);
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lineWidthFixedAction->setCheckable(true);
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QActionGroup *lineWidthGroup = new QActionGroup(this);
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lineWidthGroup->addAction(lineWidthPressureAction);
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lineWidthGroup->addAction(lineWidthTiltAction);
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lineWidthGroup->addAction(lineWidthFixedAction);
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connect(lineWidthGroup, &QActionGroup::triggered, this,
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&MainWindow::setLineWidthValuator);
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//! [9]
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QMenu *alphaChannelMenu = tabletMenu->addMenu(tr("&Alpha Channel"));
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QAction *alphaChannelPressureAction = alphaChannelMenu->addAction(tr("&Pressure"));
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alphaChannelPressureAction->setData(TabletCanvas::PressureValuator);
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alphaChannelPressureAction->setCheckable(true);
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QAction *alphaChannelTangentialPressureAction = alphaChannelMenu->addAction(tr("T&angential Pressure"));
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alphaChannelTangentialPressureAction->setData(TabletCanvas::TangentialPressureValuator);
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alphaChannelTangentialPressureAction->setCheckable(true);
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alphaChannelTangentialPressureAction->setChecked(true);
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QAction *alphaChannelTiltAction = alphaChannelMenu->addAction(tr("&Tilt"));
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alphaChannelTiltAction->setData(TabletCanvas::TiltValuator);
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alphaChannelTiltAction->setCheckable(true);
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QAction *noAlphaChannelAction = alphaChannelMenu->addAction(tr("No Alpha Channel"));
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noAlphaChannelAction->setData(TabletCanvas::NoValuator);
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noAlphaChannelAction->setCheckable(true);
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QActionGroup *alphaChannelGroup = new QActionGroup(this);
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alphaChannelGroup->addAction(alphaChannelPressureAction);
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alphaChannelGroup->addAction(alphaChannelTangentialPressureAction);
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alphaChannelGroup->addAction(alphaChannelTiltAction);
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alphaChannelGroup->addAction(noAlphaChannelAction);
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connect(alphaChannelGroup, &QActionGroup::triggered,
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this, &MainWindow::setAlphaValuator);
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//! [9]
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QMenu *colorSaturationMenu = tabletMenu->addMenu(tr("&Color Saturation"));
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QAction *colorSaturationVTiltAction = colorSaturationMenu->addAction(tr("&Vertical Tilt"));
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colorSaturationVTiltAction->setData(TabletCanvas::VTiltValuator);
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colorSaturationVTiltAction->setCheckable(true);
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QAction *colorSaturationHTiltAction = colorSaturationMenu->addAction(tr("&Horizontal Tilt"));
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colorSaturationHTiltAction->setData(TabletCanvas::HTiltValuator);
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colorSaturationHTiltAction->setCheckable(true);
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QAction *colorSaturationPressureAction = colorSaturationMenu->addAction(tr("&Pressure"));
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colorSaturationPressureAction->setData(TabletCanvas::PressureValuator);
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colorSaturationPressureAction->setCheckable(true);
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QAction *noColorSaturationAction = colorSaturationMenu->addAction(tr("&No Color Saturation"));
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noColorSaturationAction->setData(TabletCanvas::NoValuator);
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noColorSaturationAction->setCheckable(true);
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noColorSaturationAction->setChecked(true);
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QActionGroup *colorSaturationGroup = new QActionGroup(this);
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colorSaturationGroup->addAction(colorSaturationVTiltAction);
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colorSaturationGroup->addAction(colorSaturationHTiltAction);
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colorSaturationGroup->addAction(colorSaturationPressureAction);
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colorSaturationGroup->addAction(noColorSaturationAction);
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connect(colorSaturationGroup, &QActionGroup::triggered,
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this, &MainWindow::setSaturationValuator);
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QAction *compressAction = tabletMenu->addAction(tr("Co&mpress events"));
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compressAction->setCheckable(true);
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connect(compressAction, &QAction::toggled, this, &MainWindow::setEventCompression);
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QMenu *helpMenu = menuBar()->addMenu("&Help");
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helpMenu->addAction(tr("A&bout"), this, &MainWindow::about);
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helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
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}
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