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<td >Qt 5.9</td><td ><a href="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-itemviews-editabletreemodel-example.html">Editable Tree Model Example</a></td><td >mainwindow.cpp Example File</td></tr></table><table class="buildversion"><tr>
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<h1 class="title">mainwindow.cpp Example File</h1>
<span class="subtitle">itemviews/editabletreemodel/mainwindow.cpp</span>
<!-- $$$itemviews/editabletreemodel/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 "mainwindow.h"</span>
<span class="preprocessor">#include "treemodel.h"</span>
<span class="preprocessor">#include <QFile></span>
MainWindow<span class="operator">::</span>MainWindow(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="qmainwindow.html">QMainWindow</a></span>(parent)
{
setupUi(<span class="keyword">this</span>);
<span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> headers;
headers <span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"Title"</span>) <span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"Description"</span>);
<span class="type"><a href="../qtcore/qfile.html">QFile</a></span> file(<span class="string">":/default.txt"</span>);
file<span class="operator">.</span>open(<span class="type"><a href="../qtcore/qiodevice.html">QIODevice</a></span><span class="operator">::</span>ReadOnly);
TreeModel <span class="operator">*</span>model <span class="operator">=</span> <span class="keyword">new</span> TreeModel(headers<span class="operator">,</span> file<span class="operator">.</span>readAll());
file<span class="operator">.</span>close();
view<span class="operator">-</span><span class="operator">></span>setModel(model);
<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> model<span class="operator">-</span><span class="operator">></span>columnCount(); <span class="operator">+</span><span class="operator">+</span>column)
view<span class="operator">-</span><span class="operator">></span>resizeColumnToContents(column);
connect(exitAction<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> qApp<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>quit);
connect(view<span class="operator">-</span><span class="operator">></span>selectionModel()<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtcore/qitemselectionmodel.html">QItemSelectionModel</a></span><span class="operator">::</span>selectionChanged<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>updateActions);
connect(actionsMenu<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qmenu.html">QMenu</a></span><span class="operator">::</span>aboutToShow<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>updateActions);
connect(insertRowAction<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</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>insertRow);
connect(insertColumnAction<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</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>insertColumn);
connect(removeRowAction<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</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>removeRow);
connect(removeColumnAction<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</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>removeColumn);
connect(insertChildAction<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</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>insertChild);
updateActions();
}
<span class="type">void</span> MainWindow<span class="operator">::</span>insertChild()
{
<span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> index <span class="operator">=</span> view<span class="operator">-</span><span class="operator">></span>selectionModel()<span class="operator">-</span><span class="operator">></span>currentIndex();
<span class="type"><a href="../qtcore/qabstractitemmodel.html">QAbstractItemModel</a></span> <span class="operator">*</span>model <span class="operator">=</span> view<span class="operator">-</span><span class="operator">></span>model();
<span class="keyword">if</span> (model<span class="operator">-</span><span class="operator">></span>columnCount(index) <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) {
<span class="keyword">if</span> (<span class="operator">!</span>model<span class="operator">-</span><span class="operator">></span>insertColumn(<span class="number">0</span><span class="operator">,</span> index))
<span class="keyword">return</span>;
}
<span class="keyword">if</span> (<span class="operator">!</span>model<span class="operator">-</span><span class="operator">></span>insertRow(<span class="number">0</span><span class="operator">,</span> index))
<span class="keyword">return</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> model<span class="operator">-</span><span class="operator">></span>columnCount(index); <span class="operator">+</span><span class="operator">+</span>column) {
<span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> child <span class="operator">=</span> model<span class="operator">-</span><span class="operator">></span>index(<span class="number">0</span><span class="operator">,</span> column<span class="operator">,</span> index);
model<span class="operator">-</span><span class="operator">></span>setData(child<span class="operator">,</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>(<span class="string">"[No data]"</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>EditRole);
<span class="keyword">if</span> (<span class="operator">!</span>model<span class="operator">-</span><span class="operator">></span>headerData(column<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal)<span class="operator">.</span>isValid())
model<span class="operator">-</span><span class="operator">></span>setHeaderData(column<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>(<span class="string">"[No header]"</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>EditRole);
}
view<span class="operator">-</span><span class="operator">></span>selectionModel()<span class="operator">-</span><span class="operator">></span>setCurrentIndex(model<span class="operator">-</span><span class="operator">></span>index(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> index)<span class="operator">,</span>
<span class="type"><a href="../qtcore/qitemselectionmodel.html">QItemSelectionModel</a></span><span class="operator">::</span>ClearAndSelect);
updateActions();
}
bool MainWindow<span class="operator">::</span>insertColumn()
{
<span class="type"><a href="../qtcore/qabstractitemmodel.html">QAbstractItemModel</a></span> <span class="operator">*</span>model <span class="operator">=</span> view<span class="operator">-</span><span class="operator">></span>model();
<span class="type">int</span> column <span class="operator">=</span> view<span class="operator">-</span><span class="operator">></span>selectionModel()<span class="operator">-</span><span class="operator">></span>currentIndex()<span class="operator">.</span>column();
<span class="comment">// Insert a column in the parent item.</span>
bool changed <span class="operator">=</span> model<span class="operator">-</span><span class="operator">></span>insertColumn(column <span class="operator">+</span> <span class="number">1</span>);
<span class="keyword">if</span> (changed)
model<span class="operator">-</span><span class="operator">></span>setHeaderData(column <span class="operator">+</span> <span class="number">1</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>(<span class="string">"[No header]"</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>EditRole);
updateActions();
<span class="keyword">return</span> changed;
}
<span class="type">void</span> MainWindow<span class="operator">::</span>insertRow()
{
<span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> index <span class="operator">=</span> view<span class="operator">-</span><span class="operator">></span>selectionModel()<span class="operator">-</span><span class="operator">></span>currentIndex();
<span class="type"><a href="../qtcore/qabstractitemmodel.html">QAbstractItemModel</a></span> <span class="operator">*</span>model <span class="operator">=</span> view<span class="operator">-</span><span class="operator">></span>model();
<span class="keyword">if</span> (<span class="operator">!</span>model<span class="operator">-</span><span class="operator">></span>insertRow(index<span class="operator">.</span>row()<span class="operator">+</span><span class="number">1</span><span class="operator">,</span> index<span class="operator">.</span>parent()))
<span class="keyword">return</span>;
updateActions();
<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> model<span class="operator">-</span><span class="operator">></span>columnCount(index<span class="operator">.</span>parent()); <span class="operator">+</span><span class="operator">+</span>column) {
<span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> child <span class="operator">=</span> model<span class="operator">-</span><span class="operator">></span>index(index<span class="operator">.</span>row()<span class="operator">+</span><span class="number">1</span><span class="operator">,</span> column<span class="operator">,</span> index<span class="operator">.</span>parent());
model<span class="operator">-</span><span class="operator">></span>setData(child<span class="operator">,</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>(<span class="string">"[No data]"</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>EditRole);
}
}
bool MainWindow<span class="operator">::</span>removeColumn()
{
<span class="type"><a href="../qtcore/qabstractitemmodel.html">QAbstractItemModel</a></span> <span class="operator">*</span>model <span class="operator">=</span> view<span class="operator">-</span><span class="operator">></span>model();
<span class="type">int</span> column <span class="operator">=</span> view<span class="operator">-</span><span class="operator">></span>selectionModel()<span class="operator">-</span><span class="operator">></span>currentIndex()<span class="operator">.</span>column();
<span class="comment">// Insert columns in each child of the parent item.</span>
bool changed <span class="operator">=</span> model<span class="operator">-</span><span class="operator">></span>removeColumn(column);
<span class="keyword">if</span> (changed)
updateActions();
<span class="keyword">return</span> changed;
}
<span class="type">void</span> MainWindow<span class="operator">::</span>removeRow()
{
<span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> index <span class="operator">=</span> view<span class="operator">-</span><span class="operator">></span>selectionModel()<span class="operator">-</span><span class="operator">></span>currentIndex();
<span class="type"><a href="../qtcore/qabstractitemmodel.html">QAbstractItemModel</a></span> <span class="operator">*</span>model <span class="operator">=</span> view<span class="operator">-</span><span class="operator">></span>model();
<span class="keyword">if</span> (model<span class="operator">-</span><span class="operator">></span>removeRow(index<span class="operator">.</span>row()<span class="operator">,</span> index<span class="operator">.</span>parent()))
updateActions();
}
<span class="type">void</span> MainWindow<span class="operator">::</span>updateActions()
{
bool hasSelection <span class="operator">=</span> <span class="operator">!</span>view<span class="operator">-</span><span class="operator">></span>selectionModel()<span class="operator">-</span><span class="operator">></span>selection()<span class="operator">.</span>isEmpty();
removeRowAction<span class="operator">-</span><span class="operator">></span>setEnabled(hasSelection);
removeColumnAction<span class="operator">-</span><span class="operator">></span>setEnabled(hasSelection);
bool hasCurrent <span class="operator">=</span> view<span class="operator">-</span><span class="operator">></span>selectionModel()<span class="operator">-</span><span class="operator">></span>currentIndex()<span class="operator">.</span>isValid();
insertRowAction<span class="operator">-</span><span class="operator">></span>setEnabled(hasCurrent);
insertColumnAction<span class="operator">-</span><span class="operator">></span>setEnabled(hasCurrent);
<span class="keyword">if</span> (hasCurrent) {
view<span class="operator">-</span><span class="operator">></span>closePersistentEditor(view<span class="operator">-</span><span class="operator">></span>selectionModel()<span class="operator">-</span><span class="operator">></span>currentIndex());
<span class="type">int</span> row <span class="operator">=</span> view<span class="operator">-</span><span class="operator">></span>selectionModel()<span class="operator">-</span><span class="operator">></span>currentIndex()<span class="operator">.</span>row();
<span class="type">int</span> column <span class="operator">=</span> view<span class="operator">-</span><span class="operator">></span>selectionModel()<span class="operator">-</span><span class="operator">></span>currentIndex()<span class="operator">.</span>column();
<span class="keyword">if</span> (view<span class="operator">-</span><span class="operator">></span>selectionModel()<span class="operator">-</span><span class="operator">></span>currentIndex()<span class="operator">.</span>parent()<span class="operator">.</span>isValid())
statusBar()<span class="operator">-</span><span class="operator">></span>showMessage(tr(<span class="string">"Position: (%1,%2)"</span>)<span class="operator">.</span>arg(row)<span class="operator">.</span>arg(column));
<span class="keyword">else</span>
statusBar()<span class="operator">-</span><span class="operator">></span>showMessage(tr(<span class="string">"Position: (%1,%2) in top level"</span>)<span class="operator">.</span>arg(row)<span class="operator">.</span>arg(column));
}
}
</pre>
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<!-- @@@itemviews/editabletreemodel/mainwindow.cpp -->
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Mageia
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6
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armv5tl
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media
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core-updates
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files
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3998
