<?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>dialog.cpp Example File | Qt Widgets 5.12.6</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 5.12</td><td ><a href="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-layouts-dynamiclayouts-example.html">Dynamic Layouts Example</a></td><td >dialog.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtwidgets-index.html">Qt 5.12.6 Reference Documentation</a></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">dialog.cpp Example File</h1> <span class="subtitle">layouts/dynamiclayouts/dialog.cpp</span> <!-- $$$layouts/dynamiclayouts/dialog.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 "dialog.h"</span> Dialog<span class="operator">::</span>Dialog(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qdialog.html">QDialog</a></span>(parent) { createRotatableGroupBox(); createOptionsGroupBox(); createButtonBox(); mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>; mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(rotatableGroupBox<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>); mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(optionsGroupBox<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span>); mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(buttonBox<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span>); setLayout(mainLayout); mainLayout<span class="operator">-</span><span class="operator">></span>setSizeConstraint(<span class="type"><a href="qlayout.html">QLayout</a></span><span class="operator">::</span>SetMinimumSize); setWindowTitle(tr(<span class="string">"Dynamic Layouts"</span>)); } <span class="type">void</span> Dialog<span class="operator">::</span>buttonsOrientationChanged(<span class="type">int</span> index) { mainLayout<span class="operator">-</span><span class="operator">></span>setSizeConstraint(<span class="type"><a href="qlayout.html">QLayout</a></span><span class="operator">::</span>SetNoConstraint); setMinimumSize(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>); <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Orientation orientation <span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Orientation( buttonsOrientationComboBox<span class="operator">-</span><span class="operator">></span>itemData(index)<span class="operator">.</span>toInt()); <span class="keyword">if</span> (orientation <span class="operator">=</span><span class="operator">=</span> buttonBox<span class="operator">-</span><span class="operator">></span>orientation()) <span class="keyword">return</span>; mainLayout<span class="operator">-</span><span class="operator">></span>removeWidget(buttonBox); <span class="type">int</span> spacing <span class="operator">=</span> mainLayout<span class="operator">-</span><span class="operator">></span>spacing(); <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> oldSizeHint <span class="operator">=</span> buttonBox<span class="operator">-</span><span class="operator">></span>sizeHint() <span class="operator">+</span> <span class="type"><a href="../qtcore/qsize.html">QSize</a></span>(spacing<span class="operator">,</span> spacing); buttonBox<span class="operator">-</span><span class="operator">></span>setOrientation(orientation); <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> newSizeHint <span class="operator">=</span> buttonBox<span class="operator">-</span><span class="operator">></span>sizeHint() <span class="operator">+</span> <span class="type"><a href="../qtcore/qsize.html">QSize</a></span>(spacing<span class="operator">,</span> spacing); <span class="keyword">if</span> (orientation <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal) { mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(buttonBox<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span>); resize(size() <span class="operator">+</span> <span class="type"><a href="../qtcore/qsize.html">QSize</a></span>(<span class="operator">-</span>oldSizeHint<span class="operator">.</span>width()<span class="operator">,</span> newSizeHint<span class="operator">.</span>height())); } <span class="keyword">else</span> { mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(buttonBox<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">3</span><span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span>); resize(size() <span class="operator">+</span> <span class="type"><a href="../qtcore/qsize.html">QSize</a></span>(newSizeHint<span class="operator">.</span>width()<span class="operator">,</span> <span class="operator">-</span>oldSizeHint<span class="operator">.</span>height())); } mainLayout<span class="operator">-</span><span class="operator">></span>setSizeConstraint(<span class="type"><a href="qlayout.html">QLayout</a></span><span class="operator">::</span>SetDefaultConstraint); } <span class="type">void</span> Dialog<span class="operator">::</span>rotateWidgets() { Q_ASSERT(rotatableWidgets<span class="operator">.</span>count() <span class="operator">%</span> <span class="number">2</span> <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>); foreach (<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widget<span class="operator">,</span> rotatableWidgets) rotatableLayout<span class="operator">-</span><span class="operator">></span>removeWidget(widget); rotatableWidgets<span class="operator">.</span>enqueue(rotatableWidgets<span class="operator">.</span>dequeue()); <span class="keyword">const</span> <span class="type">int</span> n <span class="operator">=</span> rotatableWidgets<span class="operator">.</span>count(); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> n <span class="operator">/</span> <span class="number">2</span>; <span class="operator">+</span><span class="operator">+</span>i) { rotatableLayout<span class="operator">-</span><span class="operator">></span>addWidget(rotatableWidgets<span class="operator">[</span>n <span class="operator">-</span> i <span class="operator">-</span> <span class="number">1</span><span class="operator">]</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> i); rotatableLayout<span class="operator">-</span><span class="operator">></span>addWidget(rotatableWidgets<span class="operator">[</span>i<span class="operator">]</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> i); } } <span class="type">void</span> Dialog<span class="operator">::</span>help() { <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Dynamic Layouts Help"</span>)<span class="operator">,</span> tr(<span class="string">"This example shows how to change layouts "</span> <span class="string">"dynamically."</span>)); } <span class="type">void</span> Dialog<span class="operator">::</span>createRotatableGroupBox() { rotatableGroupBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(tr(<span class="string">"Rotatable Widgets"</span>)); rotatableWidgets<span class="operator">.</span>enqueue(<span class="keyword">new</span> <span class="type"><a href="qspinbox.html">QSpinBox</a></span>); rotatableWidgets<span class="operator">.</span>enqueue(<span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>); rotatableWidgets<span class="operator">.</span>enqueue(<span class="keyword">new</span> <span class="type"><a href="qdial.html">QDial</a></span>); rotatableWidgets<span class="operator">.</span>enqueue(<span class="keyword">new</span> <span class="type"><a href="qprogressbar.html">QProgressBar</a></span>); <span class="type">int</span> n <span class="operator">=</span> rotatableWidgets<span class="operator">.</span>count(); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> n; <span class="operator">+</span><span class="operator">+</span>i) { connect(rotatableWidgets<span class="operator">[</span>i<span class="operator">]</span><span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> rotatableWidgets<span class="operator">[</span>(i <span class="operator">+</span> <span class="number">1</span>) <span class="operator">%</span> n<span class="operator">]</span><span class="operator">,</span> SLOT(setValue(<span class="type">int</span>))); } rotatableLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>; rotatableGroupBox<span class="operator">-</span><span class="operator">></span>setLayout(rotatableLayout); rotateWidgets(); } <span class="type">void</span> Dialog<span class="operator">::</span>createOptionsGroupBox() { optionsGroupBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(tr(<span class="string">"Options"</span>)); buttonsOrientationLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"Orientation of buttons:"</span>)); buttonsOrientationComboBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qcombobox.html">QComboBox</a></span>; buttonsOrientationComboBox<span class="operator">-</span><span class="operator">></span>addItem(tr(<span class="string">"Horizontal"</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal); buttonsOrientationComboBox<span class="operator">-</span><span class="operator">></span>addItem(tr(<span class="string">"Vertical"</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Vertical); connect(buttonsOrientationComboBox<span class="operator">,</span> <span class="type">QOverload</span><span class="operator"><</span><span class="type">int</span><span class="operator">></span><span class="operator">::</span>of(<span class="operator">&</span><span class="type"><a href="qcombobox.html">QComboBox</a></span><span class="operator">::</span>currentIndexChanged)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>Dialog<span class="operator">::</span>buttonsOrientationChanged); optionsLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>; optionsLayout<span class="operator">-</span><span class="operator">></span>addWidget(buttonsOrientationLabel<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>); optionsLayout<span class="operator">-</span><span class="operator">></span>addWidget(buttonsOrientationComboBox<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span>); optionsLayout<span class="operator">-</span><span class="operator">></span>setColumnStretch(<span class="number">2</span><span class="operator">,</span> <span class="number">1</span>); optionsGroupBox<span class="operator">-</span><span class="operator">></span>setLayout(optionsLayout); } <span class="type">void</span> Dialog<span class="operator">::</span>createButtonBox() { buttonBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span>; closeButton <span class="operator">=</span> buttonBox<span class="operator">-</span><span class="operator">></span>addButton(<span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span><span class="operator">::</span>Close); helpButton <span class="operator">=</span> buttonBox<span class="operator">-</span><span class="operator">></span>addButton(<span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span><span class="operator">::</span>Help); rotateWidgetsButton <span class="operator">=</span> buttonBox<span class="operator">-</span><span class="operator">></span>addButton(tr(<span class="string">"Rotate &Widgets"</span>)<span class="operator">,</span> <span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span><span class="operator">::</span>ActionRole); connect(rotateWidgetsButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>Dialog<span class="operator">::</span>rotateWidgets); connect(closeButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>Dialog<span class="operator">::</span>close); connect(helpButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>Dialog<span class="operator">::</span>help); } </pre> </div> <!-- @@@layouts/dynamiclayouts/dialog.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 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>