<?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" />
<!-- sipdialog.qdoc -->
<title>Qt 4.8: SIP Dialog Example</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 & 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> 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 & 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 -->
<li><a href="all-examples.html">Examples</a></li>
<li>SIP Dialog Example</li>
</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">
<div class="toc">
<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#dialog-class-definition">Dialog Class Definition</a></li>
<li class="level1"><a href="#dialog-class-implementation">Dialog Class Implementation</a></li>
<li class="level1"><a href="#the-function">The <tt>main()</tt> function</a></li>
</ul>
</div>
<h1 class="title">SIP Dialog Example</h1>
<span class="subtitle"></span>
<!-- $$$dialogs/sipdialog-description -->
<div class="descr"> <a name="details"></a>
<p>Files:</p>
<ul>
<li><a href="dialogs-sipdialog-dialog-cpp.html">dialogs/sipdialog/dialog.cpp</a></li>
<li><a href="dialogs-sipdialog-dialog-h.html">dialogs/sipdialog/dialog.h</a></li>
<li><a href="dialogs-sipdialog-main-cpp.html">dialogs/sipdialog/main.cpp</a></li>
<li><a href="dialogs-sipdialog-sipdialog-pro.html">dialogs/sipdialog/sipdialog.pro</a></li>
</ul>
<p>The SIP Dialog example shows how to create a dialog that is aware of the Windows Mobile SIP (Software Input Panel) and reacts to it.<table class="generic">
<tr valign="top" class="odd"><td ><img src="images/sipdialog-closed.png" alt="" /></td><td ><img src="images/sipdialog-opened.png" alt="" /></td></tr>
</table>
<p>Sometimes it is necessary for a dialog to take the SIP into account, as the SIP may hide important input widgets. The SIP Dialog Example shows how a <tt>Dialog</tt> object, <tt>dialog</tt>, can be resized accordingly if the SIP is opened, by embedding the contents of <tt>dialog</tt> in a <a href="qscrollarea.html">QScrollArea</a>.</p>
<a name="dialog-class-definition"></a>
<h2>Dialog Class Definition</h2>
<p>The <tt>Dialog</tt> class is a subclass of <a href="qdialog.html">QDialog</a> that implements a public slot, <tt>desktopResized()</tt>, and a public function, <tt>reactToSIP()</tt>. Also, it holds a private instance of <a href="qrect.html">QRect</a>, <tt>desktopGeometry</tt>.</p>
<pre class="cpp"> <span class="keyword">class</span> Dialog : <span class="keyword">public</span> <span class="type"><a href="qdialog.html">QDialog</a></span>
{
Q_OBJECT
<span class="keyword">public</span>:
Dialog();
<span class="type">void</span> reactToSIP();
<span class="keyword">private</span>:
<span class="type"><a href="qrect.html">QRect</a></span> desktopGeometry;
<span class="keyword">public</span> <span class="keyword">slots</span>:
<span class="type">void</span> desktopResized(<span class="type">int</span> screen);
};</pre>
<a name="dialog-class-implementation"></a>
<h2>Dialog Class Implementation</h2>
<p>In the constructor of <tt>Dialog</tt>, we start by obtaining the available geometry of the screen with <a href="qdesktopwidget.html#availableGeometry">availableGeometry()</a>. The parameter used is <tt>0</tt> to indicate that we require the primary screen.</p>
<pre class="cpp"> Dialog<span class="operator">::</span>Dialog()
{
desktopGeometry <span class="operator">=</span> <span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>desktop()<span class="operator">-</span><span class="operator">></span>availableGeometry(<span class="number">0</span>);
setWindowTitle(tr(<span class="string">"SIP Dialog Example"</span>));
<span class="type"><a href="qscrollarea.html">QScrollArea</a></span> <span class="operator">*</span>scrollArea <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qscrollarea.html">QScrollArea</a></span>(<span class="keyword">this</span>);
<span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>groupBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(scrollArea);
groupBox<span class="operator">-</span><span class="operator">></span>setTitle(tr(<span class="string">"SIP Dialog Example"</span>));
<span class="type"><a href="qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>gridLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>(groupBox);
groupBox<span class="operator">-</span><span class="operator">></span>setLayout(gridLayout);</pre>
<p>We set the window's title to "SIP Dialog Example" and declare a <a href="qscrollarea.html">QScrollArea</a> object, <tt>scrollArea</tt>. Next we instantiate a <a href="qgroupbox.html">QGroupBox</a>, <tt>groupBox</tt>, with <tt>scrollArea</tt> as its parent. The title of <tt>groupBox</tt> is also set to "SIP Dialog Example". A <a href="qgridlayout.html">QGridLayout</a> object, <tt>gridLayout</tt>, is then used as <tt>groupBox</tt>'s layout.</p>
<p>We create a <a href="qlineedit.html">QLineEdit</a>, a <a href="qlabel.html">QLabel</a> and a <a href="qpushbutton.html">QPushButton</a> and we set the <a href="qwidget.html#minimumWidth-prop">minimumWidth</a> property to 220 pixels, respectively.</p>
<pre class="cpp"> <span class="type"><a href="qlineedit.html">QLineEdit</a></span><span class="operator">*</span> lineEdit <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>(groupBox);
lineEdit<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Open and close the SIP"</span>));
lineEdit<span class="operator">-</span><span class="operator">></span>setMinimumWidth(<span class="number">220</span>);
<span class="type"><a href="qlabel.html">QLabel</a></span><span class="operator">*</span> label <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(groupBox);
label<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"This dialog resizes if the SIP is opened"</span>));
label<span class="operator">-</span><span class="operator">></span>setMinimumWidth(<span class="number">220</span>);
<span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">*</span> button <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(groupBox);
button<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Close Dialog"</span>));
button<span class="operator">-</span><span class="operator">></span>setMinimumWidth(<span class="number">220</span>);</pre>
<p>Also, all three widgets' text are set accordingly. The <a href="qgridlayout.html#verticalSpacing-prop">verticalSpacing</a> property of <tt>gridLayout</tt> is set based on the height of <tt>desktopGeometry</tt>. This is to adapt to the different form factors of Windows Mobile. Then, we add our widgets to the layout.</p>
<pre class="cpp"> <span class="keyword">if</span> (desktopGeometry<span class="operator">.</span>height() <span class="operator"><</span> <span class="number">400</span>)
gridLayout<span class="operator">-</span><span class="operator">></span>setVerticalSpacing(<span class="number">80</span>);
<span class="keyword">else</span>
gridLayout<span class="operator">-</span><span class="operator">></span>setVerticalSpacing(<span class="number">150</span>);
gridLayout<span class="operator">-</span><span class="operator">></span>addWidget(label);
gridLayout<span class="operator">-</span><span class="operator">></span>addWidget(lineEdit);
gridLayout<span class="operator">-</span><span class="operator">></span>addWidget(button);</pre>
<p>The <tt>scrollArea</tt>'s widget is set to <tt>groupBox</tt>. We use a <a href="qhboxlayout.html">QHBoxLayout</a> object, <tt>layout</tt>, to contain <tt>scrollArea</tt>. The <tt>Dialog</tt>'s layout is set to <tt>layout</tt> and the scroll area's horizontal scroll bar is turned off.</p>
<pre class="cpp"> scrollArea<span class="operator">-</span><span class="operator">></span>setWidget(groupBox);
<span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span><span class="operator">*</span> layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>();
layout<span class="operator">-</span><span class="operator">></span>addWidget(scrollArea);
setLayout(layout);
scrollArea<span class="operator">-</span><span class="operator">></span>setHorizontalScrollBarPolicy(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAlwaysOff);</pre>
<p>The following signals are connected to their respective slots:</p>
<ul>
<li><tt>button</tt>'s <a href="qabstractbutton.html#pressed">pressed()</a> signal to <a href="qapplication.html">QApplication</a>'s <a href="qapplication.html#closeAllWindows">closeAllWindows()</a> slot,</li>
<li><a href="qdesktopwidget.html">QDesktopWidget</a>'s <a href="qdesktopwidget.html#workAreaResized">workAreaResized()</a> signal to <tt>dialog</tt>'s <tt>desktopResized()</tt> slot.</li>
</ul>
<pre class="cpp"> connect(button<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span>
qApp<span class="operator">,</span> SLOT(closeAllWindows()));
connect(<span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>desktop()<span class="operator">,</span> SIGNAL(workAreaResized(<span class="type">int</span>))<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> SLOT(desktopResized(<span class="type">int</span>)));
}</pre>
<p>The <tt>desktopResized()</tt> function accepts an integer, <i>screen</i>, corresponding to the screen's index. We only invoke <tt>reactToSIP()</tt> if <i>screen</i> is the primary screen (e.g. index = 0).</p>
<pre class="cpp"> <span class="type">void</span> Dialog<span class="operator">::</span>desktopResized(<span class="type">int</span> screen)
{
<span class="keyword">if</span> (screen <span class="operator">!</span><span class="operator">=</span> <span class="number">0</span>)
<span class="keyword">return</span>;
reactToSIP();
}</pre>
<p>The <tt>reactToSIP()</tt> function resizes <tt>dialog</tt> accordingly if the desktop's available geometry changed vertically, as this change signifies that the SIP may have been opened or closed.</p>
<pre class="cpp"> <span class="type">void</span> Dialog<span class="operator">::</span>reactToSIP()
{
<span class="type"><a href="qrect.html">QRect</a></span> availableGeometry <span class="operator">=</span> <span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>desktop()<span class="operator">-</span><span class="operator">></span>availableGeometry(<span class="number">0</span>);
<span class="keyword">if</span> (desktopGeometry <span class="operator">!</span><span class="operator">=</span> availableGeometry) {
<span class="keyword">if</span> (windowState() <span class="operator">|</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>WindowMaximized)
setWindowState(windowState() <span class="operator">&</span> <span class="operator">~</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>WindowMaximized);
setGeometry(availableGeometry);
}
desktopGeometry <span class="operator">=</span> availableGeometry;
}</pre>
<p>If the height has decreased, we unset the maximized window state. Otherwise, we set the maximized window state. Lastly, we update <tt>desktopGeometry</tt> to the desktop's available geometry.</p>
<a name="the-function"></a>
<h2>The <tt>main()</tt> function</h2>
<p>The <tt>main()</tt> function for the SIP Dialog example instantiates <tt>Dialog</tt> and invokes its <a href="qdialog.html#exec">exec()</a> function.</p>
<pre class="cpp"> <span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span>argv<span class="operator">[</span><span class="operator">]</span>)
{
<span class="type"><a href="qapplication.html">QApplication</a></span> app(argc<span class="operator">,</span> argv);
Dialog dialog;
<span class="keyword">return</span> dialog<span class="operator">.</span>exec();
}</pre>
<p><b>Note:</b> Although this example uses a dialog, the techniques used here apply to all top-level widgets respectively.</p>
</div>
<!-- @@@dialogs/sipdialog -->
</div>
</div>
</div>
<div class="ft">
<span></span>
</div>
</div>
<div class="footer">
<p>
<acronym title="Copyright">©</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>
