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<h1 class="title">connectionwidget.cpp Example File</h1>
<span class="small-subtitle">demos/sqlbrowser/connectionwidget.cpp</span>
<!-- $$$demos/sqlbrowser/connectionwidget.cpp-description -->
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<pre class="cpp"> <span class="comment">/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
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** This file is part of the demonstration applications of the Qt Toolkit.
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<span class="preprocessor">#include &quot;connectionwidget.h&quot;</span>
<span class="preprocessor">#include &lt;QtGui&gt;</span>
<span class="preprocessor">#include &lt;QtSql&gt;</span>
ConnectionWidget<span class="operator">::</span>ConnectionWidget(<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="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(<span class="keyword">this</span>);
tree <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtreewidget.html">QTreeWidget</a></span>(<span class="keyword">this</span>);
tree<span class="operator">-</span><span class="operator">&gt;</span>setObjectName(QLatin1String(<span class="string">&quot;tree&quot;</span>));
tree<span class="operator">-</span><span class="operator">&gt;</span>setHeaderLabels(<span class="type"><a href="qstringlist.html">QStringList</a></span>(tr(<span class="string">&quot;database&quot;</span>)));
tree<span class="operator">-</span><span class="operator">&gt;</span>header()<span class="operator">-</span><span class="operator">&gt;</span>setResizeMode(<span class="type"><a href="qheaderview.html">QHeaderView</a></span><span class="operator">::</span>Stretch);
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>refreshAction <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">&quot;Refresh&quot;</span>)<span class="operator">,</span> tree);
metaDataAction <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">&quot;Show Schema&quot;</span>)<span class="operator">,</span> tree);
connect(refreshAction<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> SLOT(refresh()));
connect(metaDataAction<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> SLOT(showMetaData()));
tree<span class="operator">-</span><span class="operator">&gt;</span>addAction(refreshAction);
tree<span class="operator">-</span><span class="operator">&gt;</span>addAction(metaDataAction);
tree<span class="operator">-</span><span class="operator">&gt;</span>setContextMenuPolicy(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ActionsContextMenu);
layout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(tree);
<span class="type"><a href="qmetaobject.html">QMetaObject</a></span><span class="operator">::</span>connectSlotsByName(<span class="keyword">this</span>);
}
ConnectionWidget<span class="operator">::</span><span class="operator">~</span>ConnectionWidget()
{
}
<span class="keyword">static</span> <span class="type"><a href="qstring.html">QString</a></span> qDBCaption(<span class="keyword">const</span> <span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span> <span class="operator">&amp;</span>db)
{
<span class="type"><a href="qstring.html">QString</a></span> nm <span class="operator">=</span> db<span class="operator">.</span>driverName();
nm<span class="operator">.</span>append(QLatin1Char(<span class="char">':'</span>));
<span class="keyword">if</span> (<span class="operator">!</span>db<span class="operator">.</span>userName()<span class="operator">.</span>isEmpty())
nm<span class="operator">.</span>append(db<span class="operator">.</span>userName())<span class="operator">.</span>append(QLatin1Char(<span class="char">'@'</span>));
nm<span class="operator">.</span>append(db<span class="operator">.</span>databaseName());
<span class="keyword">return</span> nm;
}
<span class="type">void</span> ConnectionWidget<span class="operator">::</span>refresh()
{
tree<span class="operator">-</span><span class="operator">&gt;</span>clear();
<span class="type"><a href="qstringlist.html">QStringList</a></span> connectionNames <span class="operator">=</span> <span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span><span class="operator">::</span>connectionNames();
<span class="type">bool</span> gotActiveDb <span class="operator">=</span> <span class="keyword">false</span>;
<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> connectionNames<span class="operator">.</span>count(); <span class="operator">+</span><span class="operator">+</span>i) {
<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>root <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span>(tree);
<span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span> db <span class="operator">=</span> <span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span><span class="operator">::</span>database(connectionNames<span class="operator">.</span>at(i)<span class="operator">,</span> <span class="keyword">false</span>);
root<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">0</span><span class="operator">,</span> qDBCaption(db));
<span class="keyword">if</span> (connectionNames<span class="operator">.</span>at(i) <span class="operator">=</span><span class="operator">=</span> activeDb) {
gotActiveDb <span class="operator">=</span> <span class="keyword">true</span>;
setActive(root);
}
<span class="keyword">if</span> (db<span class="operator">.</span>isOpen()) {
<span class="type"><a href="qstringlist.html">QStringList</a></span> tables <span class="operator">=</span> db<span class="operator">.</span>tables();
<span class="keyword">for</span> (<span class="type">int</span> t <span class="operator">=</span> <span class="number">0</span>; t <span class="operator">&lt;</span> tables<span class="operator">.</span>count(); <span class="operator">+</span><span class="operator">+</span>t) {
<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>table <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span>(root);
table<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">0</span><span class="operator">,</span> tables<span class="operator">.</span>at(t));
}
}
}
<span class="keyword">if</span> (<span class="operator">!</span>gotActiveDb) {
activeDb <span class="operator">=</span> connectionNames<span class="operator">.</span>value(<span class="number">0</span>);
setActive(tree<span class="operator">-</span><span class="operator">&gt;</span>topLevelItem(<span class="number">0</span>));
}
tree<span class="operator">-</span><span class="operator">&gt;</span>doItemsLayout(); <span class="comment">// HACK</span>
}
<span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span> ConnectionWidget<span class="operator">::</span>currentDatabase() <span class="keyword">const</span>
{
<span class="keyword">return</span> <span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span><span class="operator">::</span>database(activeDb);
}
<span class="keyword">static</span> <span class="type">void</span> qSetBold(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>item<span class="operator">,</span> <span class="type">bool</span> bold)
{
<span class="type"><a href="qfont.html">QFont</a></span> font <span class="operator">=</span> item<span class="operator">-</span><span class="operator">&gt;</span>font(<span class="number">0</span>);
font<span class="operator">.</span>setBold(bold);
item<span class="operator">-</span><span class="operator">&gt;</span>setFont(<span class="number">0</span><span class="operator">,</span> font);
}
<span class="type">void</span> ConnectionWidget<span class="operator">::</span>setActive(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>item)
{
<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> tree<span class="operator">-</span><span class="operator">&gt;</span>topLevelItemCount(); <span class="operator">+</span><span class="operator">+</span>i) {
<span class="keyword">if</span> (tree<span class="operator">-</span><span class="operator">&gt;</span>topLevelItem(i)<span class="operator">-</span><span class="operator">&gt;</span>font(<span class="number">0</span>)<span class="operator">.</span>bold())
qSetBold(tree<span class="operator">-</span><span class="operator">&gt;</span>topLevelItem(i)<span class="operator">,</span> <span class="keyword">false</span>);
}
<span class="keyword">if</span> (<span class="operator">!</span>item)
<span class="keyword">return</span>;
qSetBold(item<span class="operator">,</span> <span class="keyword">true</span>);
activeDb <span class="operator">=</span> <span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span><span class="operator">::</span>connectionNames()<span class="operator">.</span>value(tree<span class="operator">-</span><span class="operator">&gt;</span>indexOfTopLevelItem(item));
}
<span class="type">void</span> ConnectionWidget<span class="operator">::</span>on_tree_itemActivated(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>item<span class="operator">,</span> <span class="type">int</span> <span class="comment">/* column */</span>)
{
<span class="keyword">if</span> (<span class="operator">!</span>item)
<span class="keyword">return</span>;
<span class="keyword">if</span> (<span class="operator">!</span>item<span class="operator">-</span><span class="operator">&gt;</span>parent()) {
setActive(item);
} <span class="keyword">else</span> {
setActive(item<span class="operator">-</span><span class="operator">&gt;</span>parent());
<span class="keyword">emit</span> tableActivated(item<span class="operator">-</span><span class="operator">&gt;</span>text(<span class="number">0</span>));
}
}
<span class="type">void</span> ConnectionWidget<span class="operator">::</span>showMetaData()
{
<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>cItem <span class="operator">=</span> tree<span class="operator">-</span><span class="operator">&gt;</span>currentItem();
<span class="keyword">if</span> (<span class="operator">!</span>cItem <span class="operator">|</span><span class="operator">|</span> <span class="operator">!</span>cItem<span class="operator">-</span><span class="operator">&gt;</span>parent())
<span class="keyword">return</span>;
setActive(cItem<span class="operator">-</span><span class="operator">&gt;</span>parent());
<span class="keyword">emit</span> metaDataRequested(cItem<span class="operator">-</span><span class="operator">&gt;</span>text(<span class="number">0</span>));
}
<span class="type">void</span> ConnectionWidget<span class="operator">::</span>on_tree_currentItemChanged(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>current<span class="operator">,</span> <span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>)
{
metaDataAction<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(current <span class="operator">&amp;</span><span class="operator">&amp;</span> current<span class="operator">-</span><span class="operator">&gt;</span>parent());
}</pre>
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<!-- @@@demos/sqlbrowser/connectionwidget.cpp -->
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