<?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: borderlayout.cpp Example File (layouts/borderlayout/borderlayout.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 & 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 --> </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">borderlayout.cpp Example File</h1> <span class="small-subtitle">layouts/borderlayout/borderlayout.cpp</span> <!-- $$$layouts/borderlayout/borderlayout.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: ** ** "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 <QtGui></span> <span class="preprocessor">#include "borderlayout.h"</span> BorderLayout<span class="operator">::</span>BorderLayout(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent<span class="operator">,</span> <span class="type">int</span> margin<span class="operator">,</span> <span class="type">int</span> spacing) : <span class="type"><a href="qlayout.html">QLayout</a></span>(parent) { setMargin(margin); setSpacing(spacing); } BorderLayout<span class="operator">::</span>BorderLayout(<span class="type">int</span> spacing) { setSpacing(spacing); } BorderLayout<span class="operator">::</span><span class="operator">~</span>BorderLayout() { <span class="type"><a href="qlayoutitem.html">QLayoutItem</a></span> <span class="operator">*</span>l; <span class="keyword">while</span> ((l <span class="operator">=</span> takeAt(<span class="number">0</span>))) <span class="keyword">delete</span> l; } <span class="type">void</span> BorderLayout<span class="operator">::</span>addItem(<span class="type"><a href="qlayoutitem.html">QLayoutItem</a></span> <span class="operator">*</span>item) { add(item<span class="operator">,</span> West); } <span class="type">void</span> BorderLayout<span class="operator">::</span>addWidget(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widget<span class="operator">,</span> Position position) { add(<span class="keyword">new</span> <span class="type"><a href="qwidgetitem.html">QWidgetItem</a></span>(widget)<span class="operator">,</span> position); } <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Orientations BorderLayout<span class="operator">::</span>expandingDirections() <span class="keyword">const</span> { <span class="keyword">return</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal <span class="operator">|</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Vertical; } <span class="type">bool</span> BorderLayout<span class="operator">::</span>hasHeightForWidth() <span class="keyword">const</span> { <span class="keyword">return</span> <span class="keyword">false</span>; } <span class="type">int</span> BorderLayout<span class="operator">::</span>count() <span class="keyword">const</span> { <span class="keyword">return</span> list<span class="operator">.</span>size(); } <span class="type"><a href="qlayoutitem.html">QLayoutItem</a></span> <span class="operator">*</span>BorderLayout<span class="operator">::</span>itemAt(<span class="type">int</span> index) <span class="keyword">const</span> { ItemWrapper <span class="operator">*</span>wrapper <span class="operator">=</span> list<span class="operator">.</span>value(index); <span class="keyword">if</span> (wrapper) <span class="keyword">return</span> wrapper<span class="operator">-</span><span class="operator">></span>item; <span class="keyword">else</span> <span class="keyword">return</span> <span class="number">0</span>; } <span class="type"><a href="qsize.html">QSize</a></span> BorderLayout<span class="operator">::</span>minimumSize() <span class="keyword">const</span> { <span class="keyword">return</span> calculateSize(MinimumSize); } <span class="type">void</span> BorderLayout<span class="operator">::</span>setGeometry(<span class="keyword">const</span> <span class="type"><a href="qrect.html">QRect</a></span> <span class="operator">&</span>rect) { ItemWrapper <span class="operator">*</span>center <span class="operator">=</span> <span class="number">0</span>; <span class="type">int</span> eastWidth <span class="operator">=</span> <span class="number">0</span>; <span class="type">int</span> westWidth <span class="operator">=</span> <span class="number">0</span>; <span class="type">int</span> northHeight <span class="operator">=</span> <span class="number">0</span>; <span class="type">int</span> southHeight <span class="operator">=</span> <span class="number">0</span>; <span class="type">int</span> centerHeight <span class="operator">=</span> <span class="number">0</span>; <span class="type">int</span> i; <span class="type"><a href="qlayout.html">QLayout</a></span><span class="operator">::</span>setGeometry(rect); <span class="keyword">for</span> (i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> list<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) { ItemWrapper <span class="operator">*</span>wrapper <span class="operator">=</span> list<span class="operator">.</span>at(i); <span class="type"><a href="qlayoutitem.html">QLayoutItem</a></span> <span class="operator">*</span>item <span class="operator">=</span> wrapper<span class="operator">-</span><span class="operator">></span>item; Position position <span class="operator">=</span> wrapper<span class="operator">-</span><span class="operator">></span>position; <span class="keyword">if</span> (position <span class="operator">=</span><span class="operator">=</span> North) { item<span class="operator">-</span><span class="operator">></span>setGeometry(<span class="type"><a href="qrect.html">QRect</a></span>(rect<span class="operator">.</span>x()<span class="operator">,</span> northHeight<span class="operator">,</span> rect<span class="operator">.</span>width()<span class="operator">,</span> item<span class="operator">-</span><span class="operator">></span>sizeHint()<span class="operator">.</span>height())); northHeight <span class="operator">+</span><span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>geometry()<span class="operator">.</span>height() <span class="operator">+</span> spacing(); } <span class="keyword">else</span> <span class="keyword">if</span> (position <span class="operator">=</span><span class="operator">=</span> South) { item<span class="operator">-</span><span class="operator">></span>setGeometry(<span class="type"><a href="qrect.html">QRect</a></span>(item<span class="operator">-</span><span class="operator">></span>geometry()<span class="operator">.</span>x()<span class="operator">,</span> item<span class="operator">-</span><span class="operator">></span>geometry()<span class="operator">.</span>y()<span class="operator">,</span> rect<span class="operator">.</span>width()<span class="operator">,</span> item<span class="operator">-</span><span class="operator">></span>sizeHint()<span class="operator">.</span>height())); southHeight <span class="operator">+</span><span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>geometry()<span class="operator">.</span>height() <span class="operator">+</span> spacing(); item<span class="operator">-</span><span class="operator">></span>setGeometry(<span class="type"><a href="qrect.html">QRect</a></span>(rect<span class="operator">.</span>x()<span class="operator">,</span> rect<span class="operator">.</span>y() <span class="operator">+</span> rect<span class="operator">.</span>height() <span class="operator">-</span> southHeight <span class="operator">+</span> spacing()<span class="operator">,</span> item<span class="operator">-</span><span class="operator">></span>geometry()<span class="operator">.</span>width()<span class="operator">,</span> item<span class="operator">-</span><span class="operator">></span>geometry()<span class="operator">.</span>height())); } <span class="keyword">else</span> <span class="keyword">if</span> (position <span class="operator">=</span><span class="operator">=</span> Center) { center <span class="operator">=</span> wrapper; } } centerHeight <span class="operator">=</span> rect<span class="operator">.</span>height() <span class="operator">-</span> northHeight <span class="operator">-</span> southHeight; <span class="keyword">for</span> (i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> list<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) { ItemWrapper <span class="operator">*</span>wrapper <span class="operator">=</span> list<span class="operator">.</span>at(i); <span class="type"><a href="qlayoutitem.html">QLayoutItem</a></span> <span class="operator">*</span>item <span class="operator">=</span> wrapper<span class="operator">-</span><span class="operator">></span>item; Position position <span class="operator">=</span> wrapper<span class="operator">-</span><span class="operator">></span>position; <span class="keyword">if</span> (position <span class="operator">=</span><span class="operator">=</span> West) { item<span class="operator">-</span><span class="operator">></span>setGeometry(<span class="type"><a href="qrect.html">QRect</a></span>(rect<span class="operator">.</span>x() <span class="operator">+</span> westWidth<span class="operator">,</span> northHeight<span class="operator">,</span> item<span class="operator">-</span><span class="operator">></span>sizeHint()<span class="operator">.</span>width()<span class="operator">,</span> centerHeight)); westWidth <span class="operator">+</span><span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>geometry()<span class="operator">.</span>width() <span class="operator">+</span> spacing(); } <span class="keyword">else</span> <span class="keyword">if</span> (position <span class="operator">=</span><span class="operator">=</span> East) { item<span class="operator">-</span><span class="operator">></span>setGeometry(<span class="type"><a href="qrect.html">QRect</a></span>(item<span class="operator">-</span><span class="operator">></span>geometry()<span class="operator">.</span>x()<span class="operator">,</span> item<span class="operator">-</span><span class="operator">></span>geometry()<span class="operator">.</span>y()<span class="operator">,</span> item<span class="operator">-</span><span class="operator">></span>sizeHint()<span class="operator">.</span>width()<span class="operator">,</span> centerHeight)); eastWidth <span class="operator">+</span><span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>geometry()<span class="operator">.</span>width() <span class="operator">+</span> spacing(); item<span class="operator">-</span><span class="operator">></span>setGeometry(<span class="type"><a href="qrect.html">QRect</a></span>( rect<span class="operator">.</span>x() <span class="operator">+</span> rect<span class="operator">.</span>width() <span class="operator">-</span> eastWidth <span class="operator">+</span> spacing()<span class="operator">,</span> northHeight<span class="operator">,</span> item<span class="operator">-</span><span class="operator">></span>geometry()<span class="operator">.</span>width()<span class="operator">,</span> item<span class="operator">-</span><span class="operator">></span>geometry()<span class="operator">.</span>height())); } } <span class="keyword">if</span> (center) center<span class="operator">-</span><span class="operator">></span>item<span class="operator">-</span><span class="operator">></span>setGeometry(<span class="type"><a href="qrect.html">QRect</a></span>(westWidth<span class="operator">,</span> northHeight<span class="operator">,</span> rect<span class="operator">.</span>width() <span class="operator">-</span> eastWidth <span class="operator">-</span> westWidth<span class="operator">,</span> centerHeight)); } <span class="type"><a href="qsize.html">QSize</a></span> BorderLayout<span class="operator">::</span>sizeHint() <span class="keyword">const</span> { <span class="keyword">return</span> calculateSize(SizeHint); } <span class="type"><a href="qlayoutitem.html">QLayoutItem</a></span> <span class="operator">*</span>BorderLayout<span class="operator">::</span>takeAt(<span class="type">int</span> index) { <span class="keyword">if</span> (index <span class="operator">></span><span class="operator">=</span> <span class="number">0</span> <span class="operator">&</span><span class="operator">&</span> index <span class="operator"><</span> list<span class="operator">.</span>size()) { ItemWrapper <span class="operator">*</span>layoutStruct <span class="operator">=</span> list<span class="operator">.</span>takeAt(index); <span class="keyword">return</span> layoutStruct<span class="operator">-</span><span class="operator">></span>item; } <span class="keyword">return</span> <span class="number">0</span>; } <span class="type">void</span> BorderLayout<span class="operator">::</span>add(<span class="type"><a href="qlayoutitem.html">QLayoutItem</a></span> <span class="operator">*</span>item<span class="operator">,</span> Position position) { list<span class="operator">.</span>append(<span class="keyword">new</span> ItemWrapper(item<span class="operator">,</span> position)); } <span class="type"><a href="qsize.html">QSize</a></span> BorderLayout<span class="operator">::</span>calculateSize(SizeType sizeType) <span class="keyword">const</span> { <span class="type"><a href="qsize.html">QSize</a></span> totalSize; <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> list<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) { ItemWrapper <span class="operator">*</span>wrapper <span class="operator">=</span> list<span class="operator">.</span>at(i); Position position <span class="operator">=</span> wrapper<span class="operator">-</span><span class="operator">></span>position; <span class="type"><a href="qsize.html">QSize</a></span> itemSize; <span class="keyword">if</span> (sizeType <span class="operator">=</span><span class="operator">=</span> MinimumSize) itemSize <span class="operator">=</span> wrapper<span class="operator">-</span><span class="operator">></span>item<span class="operator">-</span><span class="operator">></span>minimumSize(); <span class="keyword">else</span> <span class="comment">// (sizeType == SizeHint)</span> itemSize <span class="operator">=</span> wrapper<span class="operator">-</span><span class="operator">></span>item<span class="operator">-</span><span class="operator">></span>sizeHint(); <span class="keyword">if</span> (position <span class="operator">=</span><span class="operator">=</span> North <span class="operator">|</span><span class="operator">|</span> position <span class="operator">=</span><span class="operator">=</span> South <span class="operator">|</span><span class="operator">|</span> position <span class="operator">=</span><span class="operator">=</span> Center) totalSize<span class="operator">.</span>rheight() <span class="operator">+</span><span class="operator">=</span> itemSize<span class="operator">.</span>height(); <span class="keyword">if</span> (position <span class="operator">=</span><span class="operator">=</span> West <span class="operator">|</span><span class="operator">|</span> position <span class="operator">=</span><span class="operator">=</span> East <span class="operator">|</span><span class="operator">|</span> position <span class="operator">=</span><span class="operator">=</span> Center) totalSize<span class="operator">.</span>rwidth() <span class="operator">+</span><span class="operator">=</span> itemSize<span class="operator">.</span>width(); } <span class="keyword">return</span> totalSize; }</pre> </div> <!-- @@@layouts/borderlayout/borderlayout.cpp --> </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>