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<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.
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** $QT_BEGIN_LICENSE:BSD$
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**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
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** * Redistributions of source code must retain the above copyright
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<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)
{
createRotableGroupBox();
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(rotableGroupBox<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(rotableWidgets<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> rotableWidgets)
rotableLayout<span class="operator">-</span><span class="operator">></span>removeWidget(widget);
rotableWidgets<span class="operator">.</span>enqueue(rotableWidgets<span class="operator">.</span>dequeue());
<span class="keyword">const</span> <span class="type">int</span> n <span class="operator">=</span> rotableWidgets<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) {
rotableLayout<span class="operator">-</span><span class="operator">></span>addWidget(rotableWidgets<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);
rotableLayout<span class="operator">-</span><span class="operator">></span>addWidget(rotableWidgets<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>createRotableGroupBox()
{
rotableGroupBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(tr(<span class="string">"Rotable Widgets"</span>));
rotableWidgets<span class="operator">.</span>enqueue(<span class="keyword">new</span> <span class="type"><a href="qspinbox.html">QSpinBox</a></span>);
rotableWidgets<span class="operator">.</span>enqueue(<span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>);
rotableWidgets<span class="operator">.</span>enqueue(<span class="keyword">new</span> <span class="type"><a href="qdial.html">QDial</a></span>);
rotableWidgets<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> rotableWidgets<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(rotableWidgets<span class="operator">[</span>i<span class="operator">]</span><span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span>
rotableWidgets<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>)));
}
rotableLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>;
rotableGroupBox<span class="operator">-</span><span class="operator">></span>setLayout(rotableLayout);
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> SIGNAL(currentIndexChanged(<span class="type">int</span>))<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> SLOT(buttonsOrientationChanged(<span class="type">int</span>)));
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> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(rotateWidgets()));
connect(closeButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(close()));
connect(helpButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(help()));
}
</pre>
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<!-- @@@layouts/dynamiclayouts/dialog.cpp -->
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