<?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>borderlayout.cpp Example File | Qt Widgets 5.12.6</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="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-layouts-borderlayout-example.html">Border Layout Example</a></td><td >borderlayout.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtwidgets-index.html">Qt 5.12.6 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">borderlayout.cpp Example File</h1> <span class="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) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples 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 "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="../qtcore/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="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal <span class="operator">|</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Vertical; } bool 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="../qtcore/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="../qtcore/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="../qtcore/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="../qtcore/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="../qtcore/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="../qtcore/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="../qtcore/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="../qtcore/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="../qtcore/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="../qtcore/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="../qtcore/qsize.html">QSize</a></span> BorderLayout<span class="operator">::</span>calculateSize(SizeType sizeType) <span class="keyword">const</span> { <span class="type"><a href="../qtcore/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="../qtcore/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> </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>