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<h1 class="title">settingstree.cpp Example File</h1>
<span class="small-subtitle">tools/settingseditor/settingstree.cpp</span>
<!-- $$$tools/settingseditor/settingstree.cpp-description -->
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<pre class="cpp"> <span class="comment">/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** &quot;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
** &quot;AS IS&quot; 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.&quot;
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include &lt;QtGui&gt;</span>
<span class="preprocessor">#include &quot;settingstree.h&quot;</span>
<span class="preprocessor">#include &quot;variantdelegate.h&quot;</span>
SettingsTree<span class="operator">::</span>SettingsTree(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="qtreewidget.html">QTreeWidget</a></span>(parent)
{
setItemDelegate(<span class="keyword">new</span> VariantDelegate(<span class="keyword">this</span>));
<span class="type"><a href="qstringlist.html">QStringList</a></span> labels;
labels <span class="operator">&lt;</span><span class="operator">&lt;</span> tr(<span class="string">&quot;Setting&quot;</span>) <span class="operator">&lt;</span><span class="operator">&lt;</span> tr(<span class="string">&quot;Type&quot;</span>) <span class="operator">&lt;</span><span class="operator">&lt;</span> tr(<span class="string">&quot;Value&quot;</span>);
setHeaderLabels(labels);
header()<span class="operator">-</span><span class="operator">&gt;</span>setResizeMode(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qheaderview.html">QHeaderView</a></span><span class="operator">::</span>Stretch);
header()<span class="operator">-</span><span class="operator">&gt;</span>setResizeMode(<span class="number">2</span><span class="operator">,</span> <span class="type"><a href="qheaderview.html">QHeaderView</a></span><span class="operator">::</span>Stretch);
settings <span class="operator">=</span> <span class="number">0</span>;
refreshTimer<span class="operator">.</span>setInterval(<span class="number">2000</span>);
autoRefresh <span class="operator">=</span> <span class="keyword">false</span>;
groupIcon<span class="operator">.</span>addPixmap(style()<span class="operator">-</span><span class="operator">&gt;</span>standardPixmap(<span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>SP_DirClosedIcon)<span class="operator">,</span>
<span class="type"><a href="qicon.html">QIcon</a></span><span class="operator">::</span>Normal<span class="operator">,</span> <span class="type"><a href="qicon.html">QIcon</a></span><span class="operator">::</span>Off);
groupIcon<span class="operator">.</span>addPixmap(style()<span class="operator">-</span><span class="operator">&gt;</span>standardPixmap(<span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>SP_DirOpenIcon)<span class="operator">,</span>
<span class="type"><a href="qicon.html">QIcon</a></span><span class="operator">::</span>Normal<span class="operator">,</span> <span class="type"><a href="qicon.html">QIcon</a></span><span class="operator">::</span>On);
keyIcon<span class="operator">.</span>addPixmap(style()<span class="operator">-</span><span class="operator">&gt;</span>standardPixmap(<span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>SP_FileIcon));
connect(<span class="operator">&amp;</span>refreshTimer<span class="operator">,</span> SIGNAL(timeout())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(maybeRefresh()));
}
<span class="type">void</span> SettingsTree<span class="operator">::</span>setSettingsObject(<span class="type"><a href="qsettings.html">QSettings</a></span> <span class="operator">*</span>settings)
{
<span class="keyword">delete</span> <span class="keyword">this</span><span class="operator">-</span><span class="operator">&gt;</span>settings;
<span class="keyword">this</span><span class="operator">-</span><span class="operator">&gt;</span>settings <span class="operator">=</span> settings;
clear();
<span class="keyword">if</span> (settings) {
settings<span class="operator">-</span><span class="operator">&gt;</span>setParent(<span class="keyword">this</span>);
refresh();
<span class="keyword">if</span> (autoRefresh)
refreshTimer<span class="operator">.</span>start();
} <span class="keyword">else</span> {
refreshTimer<span class="operator">.</span>stop();
}
}
<span class="type"><a href="qsize.html">QSize</a></span> SettingsTree<span class="operator">::</span>sizeHint() <span class="keyword">const</span>
{
<span class="keyword">return</span> <span class="type"><a href="qsize.html">QSize</a></span>(<span class="number">800</span><span class="operator">,</span> <span class="number">600</span>);
}
<span class="type">void</span> SettingsTree<span class="operator">::</span>setAutoRefresh(<span class="type">bool</span> autoRefresh)
{
<span class="keyword">this</span><span class="operator">-</span><span class="operator">&gt;</span>autoRefresh <span class="operator">=</span> autoRefresh;
<span class="keyword">if</span> (settings) {
<span class="keyword">if</span> (autoRefresh) {
maybeRefresh();
refreshTimer<span class="operator">.</span>start();
} <span class="keyword">else</span> {
refreshTimer<span class="operator">.</span>stop();
}
}
}
<span class="type">void</span> SettingsTree<span class="operator">::</span>setFallbacksEnabled(<span class="type">bool</span> enabled)
{
<span class="keyword">if</span> (settings) {
settings<span class="operator">-</span><span class="operator">&gt;</span>setFallbacksEnabled(enabled);
refresh();
}
}
<span class="type">void</span> SettingsTree<span class="operator">::</span>maybeRefresh()
{
<span class="keyword">if</span> (state() <span class="operator">!</span><span class="operator">=</span> EditingState)
refresh();
}
<span class="type">void</span> SettingsTree<span class="operator">::</span>refresh()
{
<span class="keyword">if</span> (<span class="operator">!</span>settings)
<span class="keyword">return</span>;
disconnect(<span class="keyword">this</span><span class="operator">,</span> SIGNAL(itemChanged(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span><span class="operator">*</span><span class="operator">,</span><span class="type">int</span>))<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> SLOT(updateSetting(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span><span class="operator">*</span>)));
settings<span class="operator">-</span><span class="operator">&gt;</span>sync();
updateChildItems(<span class="number">0</span>);
connect(<span class="keyword">this</span><span class="operator">,</span> SIGNAL(itemChanged(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span><span class="operator">*</span><span class="operator">,</span><span class="type">int</span>))<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> SLOT(updateSetting(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span><span class="operator">*</span>)));
}
<span class="type">bool</span> SettingsTree<span class="operator">::</span>event(<span class="type"><a href="qevent.html">QEvent</a></span> <span class="operator">*</span>event)
{
<span class="keyword">if</span> (event<span class="operator">-</span><span class="operator">&gt;</span>type() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>WindowActivate) {
<span class="keyword">if</span> (isActiveWindow() <span class="operator">&amp;</span><span class="operator">&amp;</span> autoRefresh)
maybeRefresh();
}
<span class="keyword">return</span> <span class="type"><a href="qtreewidget.html">QTreeWidget</a></span><span class="operator">::</span>event(event);
}
<span class="type">void</span> SettingsTree<span class="operator">::</span>updateSetting(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>item)
{
<span class="type"><a href="qstring.html">QString</a></span> key <span class="operator">=</span> item<span class="operator">-</span><span class="operator">&gt;</span>text(<span class="number">0</span>);
<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>ancestor <span class="operator">=</span> item<span class="operator">-</span><span class="operator">&gt;</span>parent();
<span class="keyword">while</span> (ancestor) {
key<span class="operator">.</span>prepend(ancestor<span class="operator">-</span><span class="operator">&gt;</span>text(<span class="number">0</span>) <span class="operator">+</span> <span class="string">&quot;/&quot;</span>);
ancestor <span class="operator">=</span> ancestor<span class="operator">-</span><span class="operator">&gt;</span>parent();
}
settings<span class="operator">-</span><span class="operator">&gt;</span>setValue(key<span class="operator">,</span> item<span class="operator">-</span><span class="operator">&gt;</span>data(<span class="number">2</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>UserRole));
<span class="keyword">if</span> (autoRefresh)
refresh();
}
<span class="type">void</span> SettingsTree<span class="operator">::</span>updateChildItems(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>parent)
{
<span class="type">int</span> dividerIndex <span class="operator">=</span> <span class="number">0</span>;
foreach (<span class="type"><a href="qstring.html">QString</a></span> group<span class="operator">,</span> settings<span class="operator">-</span><span class="operator">&gt;</span>childGroups()) {
<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>child;
<span class="type">int</span> childIndex <span class="operator">=</span> findChild(parent<span class="operator">,</span> group<span class="operator">,</span> dividerIndex);
<span class="keyword">if</span> (childIndex <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) {
child <span class="operator">=</span> childAt(parent<span class="operator">,</span> childIndex);
child<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">1</span><span class="operator">,</span> <span class="string">&quot;&quot;</span>);
child<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">2</span><span class="operator">,</span> <span class="string">&quot;&quot;</span>);
child<span class="operator">-</span><span class="operator">&gt;</span>setData(<span class="number">2</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>UserRole<span class="operator">,</span> <span class="type"><a href="qvariant.html">QVariant</a></span>());
moveItemForward(parent<span class="operator">,</span> childIndex<span class="operator">,</span> dividerIndex);
} <span class="keyword">else</span> {
child <span class="operator">=</span> createItem(group<span class="operator">,</span> parent<span class="operator">,</span> dividerIndex);
}
child<span class="operator">-</span><span class="operator">&gt;</span>setIcon(<span class="number">0</span><span class="operator">,</span> groupIcon);
<span class="operator">+</span><span class="operator">+</span>dividerIndex;
settings<span class="operator">-</span><span class="operator">&gt;</span>beginGroup(group);
updateChildItems(child);
settings<span class="operator">-</span><span class="operator">&gt;</span>endGroup();
}
foreach (<span class="type"><a href="qstring.html">QString</a></span> key<span class="operator">,</span> settings<span class="operator">-</span><span class="operator">&gt;</span>childKeys()) {
<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>child;
<span class="type">int</span> childIndex <span class="operator">=</span> findChild(parent<span class="operator">,</span> key<span class="operator">,</span> <span class="number">0</span>);
<span class="keyword">if</span> (childIndex <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span> <span class="operator">|</span><span class="operator">|</span> childIndex <span class="operator">&gt;</span><span class="operator">=</span> dividerIndex) {
<span class="keyword">if</span> (childIndex <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) {
child <span class="operator">=</span> childAt(parent<span class="operator">,</span> childIndex);
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> child<span class="operator">-</span><span class="operator">&gt;</span>childCount(); <span class="operator">+</span><span class="operator">+</span>i)
<span class="keyword">delete</span> childAt(child<span class="operator">,</span> i);
moveItemForward(parent<span class="operator">,</span> childIndex<span class="operator">,</span> dividerIndex);
} <span class="keyword">else</span> {
child <span class="operator">=</span> createItem(key<span class="operator">,</span> parent<span class="operator">,</span> dividerIndex);
}
child<span class="operator">-</span><span class="operator">&gt;</span>setIcon(<span class="number">0</span><span class="operator">,</span> keyIcon);
<span class="operator">+</span><span class="operator">+</span>dividerIndex;
} <span class="keyword">else</span> {
child <span class="operator">=</span> childAt(parent<span class="operator">,</span> childIndex);
}
<span class="type"><a href="qvariant.html">QVariant</a></span> value <span class="operator">=</span> settings<span class="operator">-</span><span class="operator">&gt;</span>value(key);
<span class="keyword">if</span> (value<span class="operator">.</span>type() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>Invalid) {
child<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">1</span><span class="operator">,</span> <span class="string">&quot;Invalid&quot;</span>);
} <span class="keyword">else</span> {
child<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">1</span><span class="operator">,</span> value<span class="operator">.</span>typeName());
}
child<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">2</span><span class="operator">,</span> VariantDelegate<span class="operator">::</span>displayText(value));
child<span class="operator">-</span><span class="operator">&gt;</span>setData(<span class="number">2</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>UserRole<span class="operator">,</span> value);
}
<span class="keyword">while</span> (dividerIndex <span class="operator">&lt;</span> childCount(parent))
<span class="keyword">delete</span> childAt(parent<span class="operator">,</span> dividerIndex);
}
<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>SettingsTree<span class="operator">::</span>createItem(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&amp;</span>text<span class="operator">,</span>
<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>parent<span class="operator">,</span> <span class="type">int</span> index)
{
<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>after <span class="operator">=</span> <span class="number">0</span>;
<span class="keyword">if</span> (index <span class="operator">!</span><span class="operator">=</span> <span class="number">0</span>)
after <span class="operator">=</span> childAt(parent<span class="operator">,</span> index <span class="operator">-</span> <span class="number">1</span>);
<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>item;
<span class="keyword">if</span> (parent)
item <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span>(parent<span class="operator">,</span> after);
<span class="keyword">else</span>
item <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span>(<span class="keyword">this</span><span class="operator">,</span> after);
item<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">0</span><span class="operator">,</span> text);
item<span class="operator">-</span><span class="operator">&gt;</span>setFlags(item<span class="operator">-</span><span class="operator">&gt;</span>flags() <span class="operator">|</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ItemIsEditable);
<span class="keyword">return</span> item;
}
<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>SettingsTree<span class="operator">::</span>childAt(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>parent<span class="operator">,</span> <span class="type">int</span> index)
{
<span class="keyword">if</span> (parent)
<span class="keyword">return</span> parent<span class="operator">-</span><span class="operator">&gt;</span>child(index);
<span class="keyword">else</span>
<span class="keyword">return</span> topLevelItem(index);
}
<span class="type">int</span> SettingsTree<span class="operator">::</span>childCount(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>parent)
{
<span class="keyword">if</span> (parent)
<span class="keyword">return</span> parent<span class="operator">-</span><span class="operator">&gt;</span>childCount();
<span class="keyword">else</span>
<span class="keyword">return</span> topLevelItemCount();
}
<span class="type">int</span> SettingsTree<span class="operator">::</span>findChild(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>parent<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&amp;</span>text<span class="operator">,</span>
<span class="type">int</span> startIndex)
{
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> startIndex; i <span class="operator">&lt;</span> childCount(parent); <span class="operator">+</span><span class="operator">+</span>i) {
<span class="keyword">if</span> (childAt(parent<span class="operator">,</span> i)<span class="operator">-</span><span class="operator">&gt;</span>text(<span class="number">0</span>) <span class="operator">=</span><span class="operator">=</span> text)
<span class="keyword">return</span> i;
}
<span class="keyword">return</span> <span class="operator">-</span><span class="number">1</span>;
}
<span class="type">void</span> SettingsTree<span class="operator">::</span>moveItemForward(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>parent<span class="operator">,</span> <span class="type">int</span> oldIndex<span class="operator">,</span>
<span class="type">int</span> newIndex)
{
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> oldIndex <span class="operator">-</span> newIndex; <span class="operator">+</span><span class="operator">+</span>i)
<span class="keyword">delete</span> childAt(parent<span class="operator">,</span> newIndex);
}</pre>
</div>
<!-- @@@tools/settingseditor/settingstree.cpp -->
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