<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>connectionwidget.cpp Example File | Qt SQL 5.12.2</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtsql-index.html">Qt SQL</a></td><td ><a href="qtsql-sqlbrowser-example.html">SQL Browser</a></td><td >connectionwidget.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtsql-index.html">Qt 5.12.2 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">connectionwidget.cpp Example File</h1> <span class="subtitle">sqlbrowser/connectionwidget.cpp</span> <!-- $$$sqlbrowser/connectionwidget.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 demonstration applications 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 "connectionwidget.h"</span> <span class="preprocessor">#include <QtWidgets></span> <span class="preprocessor">#include <QtSql></span> ConnectionWidget<span class="operator">::</span>ConnectionWidget(<span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span>(parent) { <span class="type"><a href="../qtwidgets/qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/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="../qtwidgets/qtreewidget.html">QTreeWidget</a></span>(<span class="keyword">this</span>); tree<span class="operator">-</span><span class="operator">></span>setObjectName(QLatin1String(<span class="string">"tree"</span>)); tree<span class="operator">-</span><span class="operator">></span>setHeaderLabels(<span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span>(tr(<span class="string">"database"</span>))); tree<span class="operator">-</span><span class="operator">></span>header()<span class="operator">-</span><span class="operator">></span>setSectionResizeMode(<span class="type"><a href="../qtwidgets/qheaderview.html">QHeaderView</a></span><span class="operator">::</span>Stretch); <span class="type"><a href="../qtwidgets/qaction.html">QAction</a></span> <span class="operator">*</span>refreshAction <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qaction.html">QAction</a></span>(tr(<span class="string">"Refresh"</span>)<span class="operator">,</span> tree); metaDataAction <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qaction.html">QAction</a></span>(tr(<span class="string">"Show Schema"</span>)<span class="operator">,</span> tree); connect(refreshAction<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtwidgets/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>ConnectionWidget<span class="operator">::</span>refresh); connect(metaDataAction<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtwidgets/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>ConnectionWidget<span class="operator">::</span>showMetaData); tree<span class="operator">-</span><span class="operator">></span>addAction(refreshAction); tree<span class="operator">-</span><span class="operator">></span>addAction(metaDataAction); tree<span class="operator">-</span><span class="operator">></span>setContextMenuPolicy(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ActionsContextMenu); layout<span class="operator">-</span><span class="operator">></span>addWidget(tree); <span class="type"><a href="../qtcore/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="../qtcore/qstring.html">QString</a></span> qDBCaption(<span class="keyword">const</span> <span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span> <span class="operator">&</span>db) { <span class="type"><a href="../qtcore/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">></span>clear(); <span class="type"><a href="../qtcore/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(); bool 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"><</span> connectionNames<span class="operator">.</span>count(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="type"><a href="../qtwidgets/qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>root <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/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">></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="../qtcore/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"><</span> tables<span class="operator">.</span>count(); <span class="operator">+</span><span class="operator">+</span>t) { <span class="type"><a href="../qtwidgets/qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>table <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qtreewidgetitem.html">QTreeWidgetItem</a></span>(root); table<span class="operator">-</span><span class="operator">></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">></span>topLevelItem(<span class="number">0</span>)); } tree<span class="operator">-</span><span class="operator">></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="../qtwidgets/qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>item<span class="operator">,</span> bool bold) { <span class="type">QFont</span> font <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>font(<span class="number">0</span>); font<span class="operator">.</span>setBold(bold); item<span class="operator">-</span><span class="operator">></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="../qtwidgets/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"><</span> tree<span class="operator">-</span><span class="operator">></span>topLevelItemCount(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="keyword">if</span> (tree<span class="operator">-</span><span class="operator">></span>topLevelItem(i)<span class="operator">-</span><span class="operator">></span>font(<span class="number">0</span>)<span class="operator">.</span>bold()) qSetBold(tree<span class="operator">-</span><span class="operator">></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">></span>indexOfTopLevelItem(item)); } <span class="type">void</span> ConnectionWidget<span class="operator">::</span>on_tree_itemActivated(<span class="type"><a href="../qtwidgets/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">></span>parent()) { setActive(item); } <span class="keyword">else</span> { setActive(item<span class="operator">-</span><span class="operator">></span>parent()); <span class="keyword">emit</span> tableActivated(item<span class="operator">-</span><span class="operator">></span>text(<span class="number">0</span>)); } } <span class="type">void</span> ConnectionWidget<span class="operator">::</span>showMetaData() { <span class="type"><a href="../qtwidgets/qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>cItem <span class="operator">=</span> tree<span class="operator">-</span><span class="operator">></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">></span>parent()) <span class="keyword">return</span>; setActive(cItem<span class="operator">-</span><span class="operator">></span>parent()); <span class="keyword">emit</span> metaDataRequested(cItem<span class="operator">-</span><span class="operator">></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="../qtwidgets/qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>current<span class="operator">,</span> <span class="type"><a href="../qtwidgets/qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>) { metaDataAction<span class="operator">-</span><span class="operator">></span>setEnabled(current <span class="operator">&</span><span class="operator">&</span> current<span class="operator">-</span><span class="operator">></span>parent()); } </pre> </div> <!-- @@@sqlbrowser/connectionwidget.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>