<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>mainwindow.cpp Example File | Qt Widgets 5.9</title>
<link rel="stylesheet" type="text/css" href="style/offline-simple.css" />
<script type="text/javascript">
document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css");
// loading style sheet breaks anchors that were jumped to before
// so force jumping to anchor again
setTimeout(function() {
var anchor = location.hash;
// need to jump to different anchor first (e.g. none)
location.hash = "#";
setTimeout(function() {
location.hash = anchor;
}, 0);
}, 0);
</script>
</head>
<body>
<div class="header" id="qtdocheader">
<div class="main">
<div class="main-rounded">
<div class="navigationbar">
<table><tr>
<td >Qt 5.9</td><td ><a href="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-widgets-tablet-example.html">Tablet Example</a></td><td >mainwindow.cpp Example File</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
</tr></table>
</div>
</div>
<div class="content">
<div class="line">
<div class="content mainContent">
<div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">mainwindow.cpp Example File</h1>
<span class="subtitle">widgets/tablet/mainwindow.cpp</span>
<!-- $$$widgets/tablet/mainwindow.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">
<span class="comment">/****************************************************************************
**
** 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include <QtWidgets></span>
<span class="preprocessor">#include "mainwindow.h"</span>
<span class="preprocessor">#include "tabletcanvas.h"</span>
MainWindow<span class="operator">::</span>MainWindow(TabletCanvas <span class="operator">*</span>canvas)
: m_canvas(canvas)<span class="operator">,</span> m_colorDialog(Q_NULLPTR)
{
createMenus();
setWindowTitle(tr(<span class="string">"Tablet Example"</span>));
setCentralWidget(m_canvas);
}
<span class="type">void</span> MainWindow<span class="operator">::</span>setBrushColor()
{
<span class="keyword">if</span> (<span class="operator">!</span>m_colorDialog) {
m_colorDialog <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qcolordialog.html">QColorDialog</a></span>(<span class="keyword">this</span>);
m_colorDialog<span class="operator">-</span><span class="operator">></span>setModal(<span class="keyword">false</span>);
m_colorDialog<span class="operator">-</span><span class="operator">></span>setCurrentColor(m_canvas<span class="operator">-</span><span class="operator">></span>color());
connect(m_colorDialog<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qcolordialog.html">QColorDialog</a></span><span class="operator">::</span>colorSelected<span class="operator">,</span> m_canvas<span class="operator">,</span> <span class="operator">&</span>TabletCanvas<span class="operator">::</span>setColor);
}
m_colorDialog<span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">true</span>);
}
<span class="type">void</span> MainWindow<span class="operator">::</span>setAlphaValuator(<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>action)
{
m_canvas<span class="operator">-</span><span class="operator">></span>setAlphaChannelValuator(action<span class="operator">-</span><span class="operator">></span>data()<span class="operator">.</span>value<span class="operator"><</span>TabletCanvas<span class="operator">::</span>Valuator<span class="operator">></span>());
}
<span class="type">void</span> MainWindow<span class="operator">::</span>setLineWidthValuator(<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>action)
{
m_canvas<span class="operator">-</span><span class="operator">></span>setLineWidthType(action<span class="operator">-</span><span class="operator">></span>data()<span class="operator">.</span>value<span class="operator"><</span>TabletCanvas<span class="operator">::</span>Valuator<span class="operator">></span>());
}
<span class="type">void</span> MainWindow<span class="operator">::</span>setSaturationValuator(<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>action)
{
m_canvas<span class="operator">-</span><span class="operator">></span>setColorSaturationValuator(action<span class="operator">-</span><span class="operator">></span>data()<span class="operator">.</span>value<span class="operator"><</span>TabletCanvas<span class="operator">::</span>Valuator<span class="operator">></span>());
}
<span class="type">void</span> MainWindow<span class="operator">::</span>save()
{
<span class="type"><a href="../qtcore/qstring.html">QString</a></span> path <span class="operator">=</span> <span class="type"><a href="../qtcore/qdir.html">QDir</a></span><span class="operator">::</span>currentPath() <span class="operator">+</span> <span class="string">"/untitled.png"</span>;
<span class="type"><a href="../qtcore/qstring.html">QString</a></span> fileName <span class="operator">=</span> <span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>getSaveFileName(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Save Picture"</span>)<span class="operator">,</span>
path);
<span class="keyword">if</span> (<span class="operator">!</span>m_canvas<span class="operator">-</span><span class="operator">></span>saveImage(fileName))
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"Error Saving Picture"</span><span class="operator">,</span>
<span class="string">"Could not save the image"</span>);
}
<span class="type">void</span> MainWindow<span class="operator">::</span>load()
{
<span class="type"><a href="../qtcore/qstring.html">QString</a></span> fileName <span class="operator">=</span> <span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>getOpenFileName(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Open Picture"</span>)<span class="operator">,</span>
<span class="type"><a href="../qtcore/qdir.html">QDir</a></span><span class="operator">::</span>currentPath());
<span class="keyword">if</span> (<span class="operator">!</span>m_canvas<span class="operator">-</span><span class="operator">></span>loadImage(fileName))
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"Error Opening Picture"</span><span class="operator">,</span>
<span class="string">"Could not open picture"</span>);
}
<span class="type">void</span> MainWindow<span class="operator">::</span>about()
{
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>about(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"About Tablet Example"</span>)<span class="operator">,</span>
tr(<span class="string">"This example shows how to use a graphics drawing tablet in Qt."</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>createMenus()
{
<span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>fileMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&File"</span>));
fileMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Open..."</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>load<span class="operator">,</span> <span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Open);
fileMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Save As..."</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>save<span class="operator">,</span> <span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>SaveAs);
fileMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"E&xit"</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>close<span class="operator">,</span> <span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Quit);
<span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>brushMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Brush"</span>));
brushMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Brush Color..."</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>setBrushColor<span class="operator">,</span> tr(<span class="string">"Ctrl+B"</span>));
<span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>tabletMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Tablet"</span>));
<span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>lineWidthMenu <span class="operator">=</span> tabletMenu<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Line Width"</span>));
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>lineWidthPressureAction <span class="operator">=</span> lineWidthMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Pressure"</span>));
lineWidthPressureAction<span class="operator">-</span><span class="operator">></span>setData(TabletCanvas<span class="operator">::</span>PressureValuator);
lineWidthPressureAction<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>);
lineWidthPressureAction<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">true</span>);
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>lineWidthTiltAction <span class="operator">=</span> lineWidthMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Tilt"</span>));
lineWidthTiltAction<span class="operator">-</span><span class="operator">></span>setData(TabletCanvas<span class="operator">::</span>TiltValuator);
lineWidthTiltAction<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>);
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>lineWidthFixedAction <span class="operator">=</span> lineWidthMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Fixed"</span>));
lineWidthFixedAction<span class="operator">-</span><span class="operator">></span>setData(TabletCanvas<span class="operator">::</span>NoValuator);
lineWidthFixedAction<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>);
<span class="type"><a href="qactiongroup.html">QActionGroup</a></span> <span class="operator">*</span>lineWidthGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qactiongroup.html">QActionGroup</a></span>(<span class="keyword">this</span>);
lineWidthGroup<span class="operator">-</span><span class="operator">></span>addAction(lineWidthPressureAction);
lineWidthGroup<span class="operator">-</span><span class="operator">></span>addAction(lineWidthTiltAction);
lineWidthGroup<span class="operator">-</span><span class="operator">></span>addAction(lineWidthFixedAction);
connect(lineWidthGroup<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qactiongroup.html">QActionGroup</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span>
<span class="operator">&</span>MainWindow<span class="operator">::</span>setLineWidthValuator);
<span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>alphaChannelMenu <span class="operator">=</span> tabletMenu<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Alpha Channel"</span>));
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>alphaChannelPressureAction <span class="operator">=</span> alphaChannelMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Pressure"</span>));
alphaChannelPressureAction<span class="operator">-</span><span class="operator">></span>setData(TabletCanvas<span class="operator">::</span>PressureValuator);
alphaChannelPressureAction<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>);
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>alphaChannelTangentialPressureAction <span class="operator">=</span> alphaChannelMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"T&angential Pressure"</span>));
alphaChannelTangentialPressureAction<span class="operator">-</span><span class="operator">></span>setData(TabletCanvas<span class="operator">::</span>TangentialPressureValuator);
alphaChannelTangentialPressureAction<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>);
alphaChannelTangentialPressureAction<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">true</span>);
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>alphaChannelTiltAction <span class="operator">=</span> alphaChannelMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Tilt"</span>));
alphaChannelTiltAction<span class="operator">-</span><span class="operator">></span>setData(TabletCanvas<span class="operator">::</span>TiltValuator);
alphaChannelTiltAction<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>);
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>noAlphaChannelAction <span class="operator">=</span> alphaChannelMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"No Alpha Channel"</span>));
noAlphaChannelAction<span class="operator">-</span><span class="operator">></span>setData(TabletCanvas<span class="operator">::</span>NoValuator);
noAlphaChannelAction<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>);
<span class="type"><a href="qactiongroup.html">QActionGroup</a></span> <span class="operator">*</span>alphaChannelGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qactiongroup.html">QActionGroup</a></span>(<span class="keyword">this</span>);
alphaChannelGroup<span class="operator">-</span><span class="operator">></span>addAction(alphaChannelPressureAction);
alphaChannelGroup<span class="operator">-</span><span class="operator">></span>addAction(alphaChannelTangentialPressureAction);
alphaChannelGroup<span class="operator">-</span><span class="operator">></span>addAction(alphaChannelTiltAction);
alphaChannelGroup<span class="operator">-</span><span class="operator">></span>addAction(noAlphaChannelAction);
connect(alphaChannelGroup<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qactiongroup.html">QActionGroup</a></span><span class="operator">::</span>triggered<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>setAlphaValuator);
<span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>colorSaturationMenu <span class="operator">=</span> tabletMenu<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Color Saturation"</span>));
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>colorSaturationVTiltAction <span class="operator">=</span> colorSaturationMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Vertical Tilt"</span>));
colorSaturationVTiltAction<span class="operator">-</span><span class="operator">></span>setData(TabletCanvas<span class="operator">::</span>VTiltValuator);
colorSaturationVTiltAction<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>);
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>colorSaturationHTiltAction <span class="operator">=</span> colorSaturationMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Horizontal Tilt"</span>));
colorSaturationHTiltAction<span class="operator">-</span><span class="operator">></span>setData(TabletCanvas<span class="operator">::</span>HTiltValuator);
colorSaturationHTiltAction<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>);
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>colorSaturationPressureAction <span class="operator">=</span> colorSaturationMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Pressure"</span>));
colorSaturationPressureAction<span class="operator">-</span><span class="operator">></span>setData(TabletCanvas<span class="operator">::</span>PressureValuator);
colorSaturationPressureAction<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>);
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>noColorSaturationAction <span class="operator">=</span> colorSaturationMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&No Color Saturation"</span>));
noColorSaturationAction<span class="operator">-</span><span class="operator">></span>setData(TabletCanvas<span class="operator">::</span>NoValuator);
noColorSaturationAction<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>);
noColorSaturationAction<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">true</span>);
<span class="type"><a href="qactiongroup.html">QActionGroup</a></span> <span class="operator">*</span>colorSaturationGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qactiongroup.html">QActionGroup</a></span>(<span class="keyword">this</span>);
colorSaturationGroup<span class="operator">-</span><span class="operator">></span>addAction(colorSaturationVTiltAction);
colorSaturationGroup<span class="operator">-</span><span class="operator">></span>addAction(colorSaturationHTiltAction);
colorSaturationGroup<span class="operator">-</span><span class="operator">></span>addAction(colorSaturationPressureAction);
colorSaturationGroup<span class="operator">-</span><span class="operator">></span>addAction(noColorSaturationAction);
connect(colorSaturationGroup<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qactiongroup.html">QActionGroup</a></span><span class="operator">::</span>triggered<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>setSaturationValuator);
<span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>helpMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(<span class="string">"&Help"</span>);
helpMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"A&bout"</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>about);
helpMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"About &Qt"</span>)<span class="operator">,</span> qApp<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>aboutQt);
}
</pre>
</div>
<!-- @@@widgets/tablet/mainwindow.cpp -->
</div>
</div>
</div>
</div>
</div>
<div class="footer">
<p>
<acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd.
Documentation contributions included herein are the copyrights of
their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> 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. </p>
</div>
</body>
</html>
distrib
>
Mageia
>
6
>
armv5tl
>
media
>
core-updates
>
by-pkgid
>
768f7d9f703884aa2562bf0a651086df
>
files
>
4575
