lili/qt4-x11
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
master
qt4-x11/doc/html/sql-drilldown-view-cpp.html
lili 35a2a1d584 init
2025-08-24 20:55:26 +08:00

379 lines
25 KiB
HTML
Raw Permalink Blame History

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en_US" lang="en_US">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Qt 4.8: view.cpp Example File (sql/drilldown/view.cpp)</title>
<link rel="stylesheet" type="text/css" href="style/style.css" />
<script src="scripts/jquery.js" type="text/javascript"></script>
<script src="scripts/functions.js" type="text/javascript"></script>
<link rel="stylesheet" type="text/css" href="style/superfish.css" />
<link rel="stylesheet" type="text/css" href="style/narrow.css" />
<!--[if IE]>
<meta name="MSSmartTagsPreventParsing" content="true">
<meta http-equiv="imagetoolbar" content="no">
<![endif]-->
<!--[if lt IE 7]>
<link rel="stylesheet" type="text/css" href="style/style_ie6.css">
<![endif]-->
<!--[if IE 7]>
<link rel="stylesheet" type="text/css" href="style/style_ie7.css">
<![endif]-->
<!--[if IE 8]>
<link rel="stylesheet" type="text/css" href="style/style_ie8.css">
<![endif]-->
<script src="scripts/superfish.js" type="text/javascript"></script>
<script src="scripts/narrow.js" type="text/javascript"></script>
</head>
<body class="" onload="CheckEmptyAndLoadList();">
<div class="header" id="qtdocheader">
<div class="content">
<div id="nav-logo">
<a href="index.html">Home</a></div>
<a href="index.html" class="qtref"><span>Qt Reference Documentation</span></a>
<div id="narrowsearch"></div>
<div id="nav-topright">
<ul>
<li class="nav-topright-home"><a href="http://qt.digia.com/">Qt HOME</a></li>
<li class="nav-topright-dev"><a href="http://qt-project.org/">DEV</a></li>
<li class="nav-topright-doc nav-topright-doc-active"><a href="http://qt-project.org/doc/">
DOC</a></li>
<li class="nav-topright-blog"><a href="http://blog.qt.digia.com/">BLOG</a></li>
</ul>
</div>
<div id="shortCut">
<ul>
<li class="shortCut-topleft-inactive"><span><a href="index.html">Qt 4.8</a></span></li>
<li class="shortCut-topleft-active"><a href="http://qt-project.org/doc/">ALL VERSIONS </a></li>
</ul>
</div>
<ul class="sf-menu" id="narrowmenu">
<li><a href="#">API Lookup</a>
<ul>
<li><a href="classes.html">Class index</a></li>
<li><a href="functions.html">Function index</a></li>
<li><a href="modules.html">Modules</a></li>
<li><a href="namespaces.html">Namespaces</a></li>
<li><a href="qtglobal.html">Global Declarations</a></li>
<li><a href="qdeclarativeelements.html">QML elements</a></li>
</ul>
</li>
<li><a href="#">Qt Topics</a>
<ul>
<li><a href="qt-basic-concepts.html">Programming with Qt</a></li>
<li><a href="qtquick.html">Device UIs &amp; Qt Quick</a></li>
<li><a href="qt-gui-concepts.html">UI Design with Qt</a></li>
<li><a href="supported-platforms.html">Supported Platforms</a></li>
<li><a href="technology-apis.html">Qt and Key Technologies</a></li>
<li><a href="best-practices.html">How-To's and Best Practices</a></li>
</ul>
</li>
<li><a href="#">Examples</a>
<ul>
<li><a href="all-examples.html">Examples</a></li>
<li><a href="tutorials.html">Tutorials</a></li>
<li><a href="demos.html">Demos</a></li>
<li><a href="qdeclarativeexamples.html">QML Examples</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div class="wrapper">
<div class="hd">
<span></span>
</div>
<div class="bd group">
<div class="sidebar">
<div class="searchlabel">
Search index:</div>
<div class="search" id="sidebarsearch">
<form id="qtdocsearch" action="" onsubmit="return false;">
<fieldset>
<input type="text" name="searchstring" id="pageType" value="" />
<div id="resultdialog">
<a href="#" id="resultclose">Close</a>
<p id="resultlinks" class="all"><a href="#" id="showallresults">All</a> | <a href="#" id="showapiresults">API</a> | <a href="#" id="showarticleresults">Articles</a> | <a href="#" id="showexampleresults">Examples</a></p>
<p id="searchcount" class="all"><span id="resultcount"></span><span id="apicount"></span><span id="articlecount"></span><span id="examplecount"></span>&nbsp;results:</p>
<ul id="resultlist" class="all">
</ul>
</div>
</fieldset>
</form>
</div>
<div class="box first bottombar" id="lookup">
<h2 title="API Lookup"><span></span>
API Lookup</h2>
<div id="list001" class="list">
<ul id="ul001" >
<li class="defaultLink"><a href="classes.html">Class index</a></li>
<li class="defaultLink"><a href="functions.html">Function index</a></li>
<li class="defaultLink"><a href="modules.html">Modules</a></li>
<li class="defaultLink"><a href="namespaces.html">Namespaces</a></li>
<li class="defaultLink"><a href="qtglobal.html">Global Declarations</a></li>
<li class="defaultLink"><a href="qdeclarativeelements.html">QML elements</a></li>
</ul>
</div>
</div>
<div class="box bottombar" id="topics">
<h2 title="Qt Topics"><span></span>
Qt Topics</h2>
<div id="list002" class="list">
<ul id="ul002" >
<li class="defaultLink"><a href="qt-basic-concepts.html">Programming with Qt</a></li>
<li class="defaultLink"><a href="qtquick.html">Device UIs &amp; Qt Quick</a></li>
<li class="defaultLink"><a href="qt-gui-concepts.html">UI Design with Qt</a></li>
<li class="defaultLink"><a href="supported-platforms.html">Supported Platforms</a></li>
<li class="defaultLink"><a href="technology-apis.html">Qt and Key Technologies</a></li>
<li class="defaultLink"><a href="best-practices.html">How-To's and Best Practices</a></li>
</ul>
</div>
</div>
<div class="box" id="examples">
<h2 title="Examples"><span></span>
Examples</h2>
<div id="list003" class="list">
<ul id="ul003">
<li class="defaultLink"><a href="all-examples.html">Examples</a></li>
<li class="defaultLink"><a href="tutorials.html">Tutorials</a></li>
<li class="defaultLink"><a href="demos.html">Demos</a></li>
<li class="defaultLink"><a href="qdeclarativeexamples.html">QML Examples</a></li>
</ul>
</div>
</div>
</div>
<div class="wrap">
<div class="toolbar">
<div class="breadcrumb toolblock">
<ul>
<li class="first"><a href="index.html">Home</a></li>
<!-- Breadcrumbs go here -->
</ul>
</div>
<div class="toolbuttons toolblock">
<ul>
<li id="smallA" class="t_button">A</li>
<li id="medA" class="t_button active">A</li>
<li id="bigA" class="t_button">A</li>
<li id="print" class="t_button"><a href="javascript:this.print();">
<span>Print</span></a></li>
</ul>
</div>
</div>
<div class="content mainContent">
<h1 class="title">view.cpp Example File</h1>
<span class="small-subtitle">sql/drilldown/view.cpp</span>
<!-- $$$sql/drilldown/view.cpp-description -->
<div class="descr"> <a name="details"></a>
<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 &quot;informationwindow.h&quot;</span>
<span class="preprocessor">#include &quot;imageitem.h&quot;</span>
<span class="preprocessor">#include &quot;view.h&quot;</span>
View<span class="operator">::</span>View(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&amp;</span>offices<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&amp;</span>images<span class="operator">,</span> <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span>(parent)
{
officeTable <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qsqlrelationaltablemodel.html">QSqlRelationalTableModel</a></span>(<span class="keyword">this</span>);
officeTable<span class="operator">-</span><span class="operator">&gt;</span>setTable(offices);
officeTable<span class="operator">-</span><span class="operator">&gt;</span>setRelation(<span class="number">1</span><span class="operator">,</span> <span class="type"><a href="qsqlrelation.html">QSqlRelation</a></span>(images<span class="operator">,</span> <span class="string">&quot;locationid&quot;</span><span class="operator">,</span> <span class="string">&quot;file&quot;</span>));
officeTable<span class="operator">-</span><span class="operator">&gt;</span>select();
scene <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgraphicsscene.html">QGraphicsScene</a></span>(<span class="keyword">this</span>);
scene<span class="operator">-</span><span class="operator">&gt;</span>setSceneRect(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">465</span><span class="operator">,</span> <span class="number">615</span>);
setScene(scene);
addItems();
<span class="type"><a href="qgraphicspixmapitem.html">QGraphicsPixmapItem</a></span> <span class="operator">*</span>logo <span class="operator">=</span> scene<span class="operator">-</span><span class="operator">&gt;</span>addPixmap(<span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">&quot;:/logo.png&quot;</span>));
logo<span class="operator">-</span><span class="operator">&gt;</span>setPos(<span class="number">30</span><span class="operator">,</span> <span class="number">515</span>);
<span class="preprocessor">#if !defined(Q_OS_SYMBIAN) &amp;&amp; !defined(Q_WS_MAEMO_5)</span>
setMinimumSize(<span class="number">470</span><span class="operator">,</span> <span class="number">620</span>);
setMaximumSize(<span class="number">470</span><span class="operator">,</span> <span class="number">620</span>);
<span class="preprocessor">#else</span>
setDragMode(<span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>ScrollHandDrag);
<span class="preprocessor">#endif</span>
setWindowTitle(tr(<span class="string">&quot;Offices World Wide&quot;</span>));
}
<span class="type">void</span> View<span class="operator">::</span>addItems()
{
<span class="type">int</span> officeCount <span class="operator">=</span> officeTable<span class="operator">-</span><span class="operator">&gt;</span>rowCount();
<span class="type">int</span> imageOffset <span class="operator">=</span> <span class="number">150</span>;
<span class="type">int</span> leftMargin <span class="operator">=</span> <span class="number">70</span>;
<span class="type">int</span> topMargin <span class="operator">=</span> <span class="number">40</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> officeCount; i<span class="operator">+</span><span class="operator">+</span>) {
ImageItem <span class="operator">*</span>image;
<span class="type"><a href="qgraphicstextitem.html">QGraphicsTextItem</a></span> <span class="operator">*</span>label;
<span class="type"><a href="qsqlrecord.html">QSqlRecord</a></span> record <span class="operator">=</span> officeTable<span class="operator">-</span><span class="operator">&gt;</span>record(i);
<span class="type">int</span> id <span class="operator">=</span> record<span class="operator">.</span>value(<span class="string">&quot;id&quot;</span>)<span class="operator">.</span>toInt();
<span class="type"><a href="qstring.html">QString</a></span> file <span class="operator">=</span> record<span class="operator">.</span>value(<span class="string">&quot;file&quot;</span>)<span class="operator">.</span>toString();
<span class="type"><a href="qstring.html">QString</a></span> location <span class="operator">=</span> record<span class="operator">.</span>value(<span class="string">&quot;location&quot;</span>)<span class="operator">.</span>toString();
<span class="type">int</span> columnOffset <span class="operator">=</span> ((i <span class="operator">/</span> <span class="number">3</span>) <span class="operator">*</span> <span class="number">37</span>);
<span class="type">int</span> x <span class="operator">=</span> ((i <span class="operator">/</span> <span class="number">3</span>) <span class="operator">*</span> imageOffset) <span class="operator">+</span> leftMargin <span class="operator">+</span> columnOffset;
<span class="type">int</span> y <span class="operator">=</span> ((i <span class="operator">%</span> <span class="number">3</span>) <span class="operator">*</span> imageOffset) <span class="operator">+</span> topMargin;
image <span class="operator">=</span> <span class="keyword">new</span> ImageItem(id<span class="operator">,</span> <span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">&quot;:/&quot;</span> <span class="operator">+</span> file));
image<span class="operator">-</span><span class="operator">&gt;</span>setData(<span class="number">0</span><span class="operator">,</span> i);
image<span class="operator">-</span><span class="operator">&gt;</span>setPos(x<span class="operator">,</span> y);
scene<span class="operator">-</span><span class="operator">&gt;</span>addItem(image);
label <span class="operator">=</span> scene<span class="operator">-</span><span class="operator">&gt;</span>addText(location);
<span class="type"><a href="qpointf.html">QPointF</a></span> labelOffset((<span class="number">150</span> <span class="operator">-</span> label<span class="operator">-</span><span class="operator">&gt;</span>boundingRect()<span class="operator">.</span>width()) <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> <span class="number">120.0</span>);
label<span class="operator">-</span><span class="operator">&gt;</span>setPos(<span class="type"><a href="qpointf.html">QPointF</a></span>(x<span class="operator">,</span> y) <span class="operator">+</span> labelOffset);
}
}
<span class="type">void</span> View<span class="operator">::</span>mouseReleaseEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>event)
{
<span class="keyword">if</span> (<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> <span class="operator">*</span>item <span class="operator">=</span> itemAt(event<span class="operator">-</span><span class="operator">&gt;</span>pos())) {
<span class="keyword">if</span> (ImageItem <span class="operator">*</span>image <span class="operator">=</span> qgraphicsitem_cast<span class="operator">&lt;</span>ImageItem <span class="operator">*</span><span class="operator">&gt;</span>(item))
showInformation(image);
}
<span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>mouseReleaseEvent(event);
}
<span class="type">void</span> View<span class="operator">::</span>showInformation(ImageItem <span class="operator">*</span>image)
{
<span class="type">int</span> id <span class="operator">=</span> image<span class="operator">-</span><span class="operator">&gt;</span>id();
<span class="keyword">if</span> (id <span class="operator">&lt;</span> <span class="number">0</span> <span class="operator">|</span><span class="operator">|</span> id <span class="operator">&gt;</span><span class="operator">=</span> officeTable<span class="operator">-</span><span class="operator">&gt;</span>rowCount())
<span class="keyword">return</span>;
InformationWindow <span class="operator">*</span>window <span class="operator">=</span> findWindow(id);
<span class="keyword">if</span> (window <span class="operator">&amp;</span><span class="operator">&amp;</span> window<span class="operator">-</span><span class="operator">&gt;</span>isVisible()) {
window<span class="operator">-</span><span class="operator">&gt;</span>raise();
window<span class="operator">-</span><span class="operator">&gt;</span>activateWindow();
} <span class="keyword">else</span> <span class="keyword">if</span> (window <span class="operator">&amp;</span><span class="operator">&amp;</span> <span class="operator">!</span>window<span class="operator">-</span><span class="operator">&gt;</span>isVisible()) {
<span class="preprocessor">#ifndef Q_OS_SYMBIAN</span>
window<span class="operator">-</span><span class="operator">&gt;</span>show();
<span class="preprocessor">#else</span>
window<span class="operator">-</span><span class="operator">&gt;</span>showMaximized();
<span class="preprocessor">#endif</span>
} <span class="keyword">else</span> {
InformationWindow <span class="operator">*</span>window;
window <span class="operator">=</span> <span class="keyword">new</span> InformationWindow(id<span class="operator">,</span> officeTable<span class="operator">,</span> <span class="keyword">this</span>);
connect(window<span class="operator">,</span> SIGNAL(imageChanged(<span class="type">int</span><span class="operator">,</span><span class="type"><a href="qstring.html">QString</a></span>))<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> SLOT(updateImage(<span class="type">int</span><span class="operator">,</span><span class="type"><a href="qstring.html">QString</a></span>)));
<span class="preprocessor">#ifndef Q_OS_SYMBIAN</span>
window<span class="operator">-</span><span class="operator">&gt;</span>move(pos() <span class="operator">+</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="number">20</span><span class="operator">,</span> <span class="number">40</span>));
window<span class="operator">-</span><span class="operator">&gt;</span>show();
<span class="preprocessor">#else</span>
window<span class="operator">-</span><span class="operator">&gt;</span>showMaximized();
<span class="preprocessor">#endif</span>
informationWindows<span class="operator">.</span>append(window);
}
}
<span class="type">void</span> View<span class="operator">::</span>updateImage(<span class="type">int</span> id<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&amp;</span>fileName)
{
<span class="type"><a href="qlist.html">QList</a></span><span class="operator">&lt;</span><span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> <span class="operator">*</span><span class="operator">&gt;</span> items <span class="operator">=</span> scene<span class="operator">-</span><span class="operator">&gt;</span>items();
<span class="keyword">while</span>(<span class="operator">!</span>items<span class="operator">.</span>empty()) {
<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> <span class="operator">*</span>item <span class="operator">=</span> items<span class="operator">.</span>takeFirst();
<span class="keyword">if</span> (ImageItem <span class="operator">*</span>image <span class="operator">=</span> qgraphicsitem_cast<span class="operator">&lt;</span>ImageItem <span class="operator">*</span><span class="operator">&gt;</span>(item)) {
<span class="keyword">if</span> (image<span class="operator">-</span><span class="operator">&gt;</span>id() <span class="operator">=</span><span class="operator">=</span> id){
image<span class="operator">-</span><span class="operator">&gt;</span>setPixmap(<span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">&quot;:/&quot;</span> <span class="operator">+</span>fileName));
image<span class="operator">-</span><span class="operator">&gt;</span>adjust();
<span class="keyword">break</span>;
}
}
}
}
InformationWindow<span class="operator">*</span> View<span class="operator">::</span>findWindow(<span class="type">int</span> id)
{
<span class="type"><a href="qlist.html">QList</a></span><span class="operator">&lt;</span>InformationWindow<span class="operator">*</span><span class="operator">&gt;</span><span class="operator">::</span>iterator i<span class="operator">,</span> beginning<span class="operator">,</span> end;
beginning <span class="operator">=</span> informationWindows<span class="operator">.</span>begin();
end <span class="operator">=</span> informationWindows<span class="operator">.</span>end();
<span class="keyword">for</span> (i <span class="operator">=</span> beginning; i <span class="operator">!</span><span class="operator">=</span> end; <span class="operator">+</span><span class="operator">+</span>i) {
InformationWindow <span class="operator">*</span>window <span class="operator">=</span> (<span class="operator">*</span>i);
<span class="keyword">if</span> (window <span class="operator">&amp;</span><span class="operator">&amp;</span> (window<span class="operator">-</span><span class="operator">&gt;</span>id() <span class="operator">=</span><span class="operator">=</span> id))
<span class="keyword">return</span> window;
}
<span class="keyword">return</span> <span class="number">0</span>;
}</pre>
</div>
<!-- @@@sql/drilldown/view.cpp -->
</div>
</div>
</div>
<div class="ft">
<span></span>
</div>
</div>
<div class="footer">
<p>
<acronym title="Copyright">&copy;</acronym> 2015 The Qt Company Ltd.
Documentation contributions included herein are the copyrights of
their respective owners.</p>
<br />
<p>
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.</p>
<p>
Documentation sources may be obtained from <a href="http://www.qt-project.org">
www.qt-project.org</a>.</p>
<br />
<p>
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. <a title="Privacy Policy"
href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p>
</div>
<script src="scripts/functions.js" type="text/javascript"></script>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink