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<h1 class="title">iconpreviewarea.cpp Example File</h1>
<span class="subtitle">widgets/icons/iconpreviewarea.cpp</span>
<!-- $$$widgets/icons/iconpreviewarea.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,
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include <QtWidgets></span>
<span class="preprocessor">#include "iconpreviewarea.h"</span>
IconPreviewArea<span class="operator">::</span>IconPreviewArea(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)
{
<span class="type"><a href="qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>(<span class="keyword">this</span>);
<span class="keyword">for</span> (<span class="type">int</span> row <span class="operator">=</span> <span class="number">0</span>; row <span class="operator"><</span> NumStates; <span class="operator">+</span><span class="operator">+</span>row) {
stateLabels<span class="operator">[</span>row<span class="operator">]</span> <span class="operator">=</span> createHeaderLabel(IconPreviewArea<span class="operator">::</span>iconStateNames()<span class="operator">.</span>at(row));
mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(stateLabels<span class="operator">[</span>row<span class="operator">]</span><span class="operator">,</span> row <span class="operator">+</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span>);
}
Q_ASSERT(NumStates <span class="operator">=</span><span class="operator">=</span> <span class="number">2</span>);
<span class="keyword">for</span> (<span class="type">int</span> column <span class="operator">=</span> <span class="number">0</span>; column <span class="operator"><</span> NumModes; <span class="operator">+</span><span class="operator">+</span>column) {
modeLabels<span class="operator">[</span>column<span class="operator">]</span> <span class="operator">=</span> createHeaderLabel(IconPreviewArea<span class="operator">::</span>iconModeNames()<span class="operator">.</span>at(column));
mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(modeLabels<span class="operator">[</span>column<span class="operator">]</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> column <span class="operator">+</span> <span class="number">1</span>);
}
Q_ASSERT(NumModes <span class="operator">=</span><span class="operator">=</span> <span class="number">4</span>);
<span class="keyword">for</span> (<span class="type">int</span> column <span class="operator">=</span> <span class="number">0</span>; column <span class="operator"><</span> NumModes; <span class="operator">+</span><span class="operator">+</span>column) {
<span class="keyword">for</span> (<span class="type">int</span> row <span class="operator">=</span> <span class="number">0</span>; row <span class="operator"><</span> NumStates; <span class="operator">+</span><span class="operator">+</span>row) {
pixmapLabels<span class="operator">[</span>column<span class="operator">]</span><span class="operator">[</span>row<span class="operator">]</span> <span class="operator">=</span> createPixmapLabel();
mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(pixmapLabels<span class="operator">[</span>column<span class="operator">]</span><span class="operator">[</span>row<span class="operator">]</span><span class="operator">,</span> row <span class="operator">+</span> <span class="number">1</span><span class="operator">,</span> column <span class="operator">+</span> <span class="number">1</span>);
}
}
}
<span class="preprocessor">#ifdef Q_COMPILER_INITIALIZER_LISTS</span>
<span class="type"><a href="../qtcore/qvector.html">QVector</a></span><span class="operator"><</span><span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>Mode<span class="operator">></span> IconPreviewArea<span class="operator">::</span>iconModes()
{
<span class="keyword">static</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qvector.html">QVector</a></span><span class="operator"><</span><span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>Mode<span class="operator">></span> result <span class="operator">=</span> {<span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>Normal<span class="operator">,</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>Active<span class="operator">,</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>Disabled<span class="operator">,</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>Selected};
<span class="keyword">return</span> result;
}
<span class="type"><a href="../qtcore/qvector.html">QVector</a></span><span class="operator"><</span><span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>State<span class="operator">></span> IconPreviewArea<span class="operator">::</span>iconStates()
{
<span class="keyword">static</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qvector.html">QVector</a></span><span class="operator"><</span><span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>State<span class="operator">></span> result <span class="operator">=</span> {<span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>Off<span class="operator">,</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>On};
<span class="keyword">return</span> result;
}
<span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> IconPreviewArea<span class="operator">::</span>iconModeNames()
{
<span class="keyword">static</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> result <span class="operator">=</span> {tr(<span class="string">"Normal"</span>)<span class="operator">,</span> tr(<span class="string">"Active"</span>)<span class="operator">,</span> tr(<span class="string">"Disabled"</span>)<span class="operator">,</span> tr(<span class="string">"Selected"</span>)};
<span class="keyword">return</span> result;
}
<span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> IconPreviewArea<span class="operator">::</span>iconStateNames()
{
<span class="keyword">static</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> result <span class="operator">=</span> {tr(<span class="string">"Off"</span>)<span class="operator">,</span> tr(<span class="string">"On"</span>)};
<span class="keyword">return</span> result;
}
<span class="preprocessor">#else // Q_COMPILER_INITIALIZER_LISTS</span>
<span class="type"><a href="../qtcore/qvector.html">QVector</a></span><span class="operator"><</span><span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>Mode<span class="operator">></span> IconPreviewArea<span class="operator">::</span>iconModes()
{
<span class="keyword">static</span> <span class="type"><a href="../qtcore/qvector.html">QVector</a></span><span class="operator"><</span><span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>Mode<span class="operator">></span> result;
<span class="keyword">if</span> (result<span class="operator">.</span>isEmpty())
result <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>Normal <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>Active <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>Disabled <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>Selected;
<span class="keyword">return</span> result;
}
<span class="type"><a href="../qtcore/qvector.html">QVector</a></span><span class="operator"><</span><span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>State<span class="operator">></span> IconPreviewArea<span class="operator">::</span>iconStates()
{
<span class="keyword">static</span> <span class="type"><a href="../qtcore/qvector.html">QVector</a></span><span class="operator"><</span><span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>State<span class="operator">></span> result;
<span class="keyword">if</span> (result<span class="operator">.</span>isEmpty())
result <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>Off <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>On;
<span class="keyword">return</span> result;
}
<span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> IconPreviewArea<span class="operator">::</span>iconModeNames()
{
<span class="keyword">static</span> <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> result;
<span class="keyword">if</span> (result<span class="operator">.</span>isEmpty())
result <span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"Normal"</span>) <span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"Active"</span>) <span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"Disabled"</span>) <span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"Selected"</span>);
<span class="keyword">return</span> result;
}
<span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> IconPreviewArea<span class="operator">::</span>iconStateNames()
{
<span class="keyword">static</span> <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> result;
<span class="keyword">if</span> (result<span class="operator">.</span>isEmpty())
result <span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"Off"</span>) <span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"On"</span>);
<span class="keyword">return</span> result;
}
<span class="preprocessor">#endif // !Q_COMPILER_INITIALIZER_LISTS</span>
<span class="type">void</span> IconPreviewArea<span class="operator">::</span>setIcon(<span class="keyword">const</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span> <span class="operator">&</span>icon)
{
<span class="keyword">this</span><span class="operator">-</span><span class="operator">></span>icon <span class="operator">=</span> icon;
updatePixmapLabels();
}
<span class="type">void</span> IconPreviewArea<span class="operator">::</span>setSize(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> <span class="operator">&</span>size)
{
<span class="keyword">if</span> (size <span class="operator">!</span><span class="operator">=</span> <span class="keyword">this</span><span class="operator">-</span><span class="operator">></span>size) {
<span class="keyword">this</span><span class="operator">-</span><span class="operator">></span>size <span class="operator">=</span> size;
updatePixmapLabels();
}
}
<span class="type"><a href="qlabel.html">QLabel</a></span> <span class="operator">*</span>IconPreviewArea<span class="operator">::</span>createHeaderLabel(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>text)
{
<span class="type"><a href="qlabel.html">QLabel</a></span> <span class="operator">*</span>label <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"<b>%1</b>"</span>)<span class="operator">.</span>arg(text));
label<span class="operator">-</span><span class="operator">></span>setAlignment(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AlignCenter);
<span class="keyword">return</span> label;
}
<span class="type"><a href="qlabel.html">QLabel</a></span> <span class="operator">*</span>IconPreviewArea<span class="operator">::</span>createPixmapLabel()
{
<span class="type"><a href="qlabel.html">QLabel</a></span> <span class="operator">*</span>label <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>;
label<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>);
label<span class="operator">-</span><span class="operator">></span>setAlignment(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AlignCenter);
label<span class="operator">-</span><span class="operator">></span>setFrameShape(<span class="type"><a href="qframe.html">QFrame</a></span><span class="operator">::</span>Box);
label<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding);
label<span class="operator">-</span><span class="operator">></span>setBackgroundRole(<span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span><span class="operator">::</span>Base);
label<span class="operator">-</span><span class="operator">></span>setAutoFillBackground(<span class="keyword">true</span>);
label<span class="operator">-</span><span class="operator">></span>setMinimumSize(<span class="number">132</span><span class="operator">,</span> <span class="number">132</span>);
<span class="keyword">return</span> label;
}
<span class="type">void</span> IconPreviewArea<span class="operator">::</span>updatePixmapLabels()
{
<span class="type"><a href="../qtgui/qwindow.html">QWindow</a></span> <span class="operator">*</span>window <span class="operator">=</span> Q_NULLPTR;
<span class="keyword">if</span> (<span class="keyword">const</span> <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>nativeParent <span class="operator">=</span> nativeParentWidget())
window <span class="operator">=</span> nativeParent<span class="operator">-</span><span class="operator">></span>windowHandle();
<span class="keyword">for</span> (<span class="type">int</span> column <span class="operator">=</span> <span class="number">0</span>; column <span class="operator"><</span> NumModes; <span class="operator">+</span><span class="operator">+</span>column) {
<span class="keyword">for</span> (<span class="type">int</span> row <span class="operator">=</span> <span class="number">0</span>; row <span class="operator"><</span> NumStates; <span class="operator">+</span><span class="operator">+</span>row) {
<span class="keyword">const</span> <span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span> pixmap <span class="operator">=</span>
icon<span class="operator">.</span>pixmap(window<span class="operator">,</span> size<span class="operator">,</span> IconPreviewArea<span class="operator">::</span>iconModes()<span class="operator">.</span>at(column)<span class="operator">,</span>
IconPreviewArea<span class="operator">::</span>iconStates()<span class="operator">.</span>at(row));
<span class="type"><a href="qlabel.html">QLabel</a></span> <span class="operator">*</span>pixmapLabel <span class="operator">=</span> pixmapLabels<span class="operator">[</span>column<span class="operator">]</span><span class="operator">[</span>row<span class="operator">]</span>;
pixmapLabel<span class="operator">-</span><span class="operator">></span>setPixmap(pixmap);
pixmapLabel<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="operator">!</span>pixmap<span class="operator">.</span>isNull());
<span class="type"><a href="../qtcore/qstring.html">QString</a></span> toolTip;
<span class="keyword">if</span> (<span class="operator">!</span>pixmap<span class="operator">.</span>isNull()) {
<span class="keyword">const</span> <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> actualSize <span class="operator">=</span> icon<span class="operator">.</span>actualSize(size);
toolTip <span class="operator">=</span>
tr(<span class="string">"Size: %1x%2\nActual size: %3x%4\nDevice pixel ratio: %5"</span>)
<span class="operator">.</span>arg(size<span class="operator">.</span>width())<span class="operator">.</span>arg(size<span class="operator">.</span>height())
<span class="operator">.</span>arg(actualSize<span class="operator">.</span>width())<span class="operator">.</span>arg(actualSize<span class="operator">.</span>height())
<span class="operator">.</span>arg(pixmap<span class="operator">.</span>devicePixelRatioF());
}
pixmapLabel<span class="operator">-</span><span class="operator">></span>setToolTip(toolTip);
}
}
}
</pre>
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<!-- @@@widgets/icons/iconpreviewarea.cpp -->
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