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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">gridlayout.cpp Example File</h1> <span class="small-subtitle">declarative/cppextensions/qgraphicslayouts/qgraphicsgridlayout/gridlayout.cpp</span> <!-- $$$declarative/cppextensions/qgraphicslayouts/qgraphicsgridlayout/gridlayout.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 "gridlayout.h"</span> <span class="preprocessor">#include <QGraphicsWidget></span> <span class="preprocessor">#include <QDebug></span> GridLayoutAttached<span class="operator">::</span>GridLayoutAttached(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qobject.html">QObject</a></span>(parent)<span class="operator">,</span> m_row(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_column(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_rowspan(<span class="number">1</span>)<span class="operator">,</span> m_colspan(<span class="number">1</span>)<span class="operator">,</span> m_alignment(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_rowStretch(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_colStretch(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_rowSpacing(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_colSpacing(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_rowPrefHeight(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_rowMaxHeight(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_rowMinHeight(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_rowFixHeight(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_colPrefwidth(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_colMaxwidth(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_colMinwidth(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_colFixwidth(<span class="operator">-</span><span class="number">1</span>) { } <span class="type">void</span> GridLayoutAttached<span class="operator">::</span>setAlignment(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Alignment a) { <span class="keyword">if</span> (m_alignment <span class="operator">!</span><span class="operator">=</span> a) { m_alignment <span class="operator">=</span> a; <span class="keyword">emit</span> alignmentChanged(<span class="keyword">reinterpret_cast</span><span class="operator"><</span><span class="type"><a href="qgraphicslayoutitem.html">QGraphicsLayoutItem</a></span><span class="operator">*</span><span class="operator">></span>(parent())<span class="operator">,</span> m_alignment); } } <span class="type"><a href="qhash.html">QHash</a></span><span class="operator"><</span><span class="type"><a href="qgraphicslayoutitem.html">QGraphicsLayoutItem</a></span><span class="operator">*</span><span class="operator">,</span> GridLayoutAttached<span class="operator">*</span><span class="operator">></span> GraphicsGridLayoutObject<span class="operator">::</span>attachedProperties; GraphicsGridLayoutObject<span class="operator">::</span>GraphicsGridLayoutObject(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qobject.html">QObject</a></span>(parent) { } GraphicsGridLayoutObject<span class="operator">::</span><span class="operator">~</span>GraphicsGridLayoutObject() { } <span class="type">void</span> GraphicsGridLayoutObject<span class="operator">::</span>addWidget(<span class="type"><a href="qgraphicswidget.html">QGraphicsWidget</a></span> <span class="operator">*</span>widget) { <span class="comment">//use attached properties</span> <span class="keyword">if</span> (<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>obj <span class="operator">=</span> attachedProperties<span class="operator">.</span>value(qobject_cast<span class="operator"><</span><span class="type"><a href="qgraphicslayoutitem.html">QGraphicsLayoutItem</a></span><span class="operator">*</span><span class="operator">></span>(widget))) { <span class="type">int</span> row <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator"><</span>GridLayoutAttached <span class="operator">*</span><span class="operator">></span>(obj)<span class="operator">-</span><span class="operator">></span>row(); <span class="type">int</span> column <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator"><</span>GridLayoutAttached <span class="operator">*</span><span class="operator">></span>(obj)<span class="operator">-</span><span class="operator">></span>column(); <span class="type">int</span> rowSpan <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator"><</span>GridLayoutAttached <span class="operator">*</span><span class="operator">></span>(obj)<span class="operator">-</span><span class="operator">></span>rowSpan(); <span class="type">int</span> columnSpan <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator"><</span>GridLayoutAttached <span class="operator">*</span><span class="operator">></span>(obj)<span class="operator">-</span><span class="operator">></span>columnSpan(); <span class="keyword">if</span> (row <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span> <span class="operator">|</span><span class="operator">|</span> column <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) { <a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"Must set row and column for an item in a grid layout"</span>; <span class="keyword">return</span>; } addItem(widget<span class="operator">,</span> row<span class="operator">,</span> column<span class="operator">,</span> rowSpan<span class="operator">,</span> columnSpan); } } <span class="type">void</span> GraphicsGridLayoutObject<span class="operator">::</span>addLayoutItem(<span class="type"><a href="qgraphicslayoutitem.html">QGraphicsLayoutItem</a></span> <span class="operator">*</span>item) { <span class="comment">//use attached properties</span> <span class="keyword">if</span> (GridLayoutAttached <span class="operator">*</span>obj <span class="operator">=</span> attachedProperties<span class="operator">.</span>value(item)) { <span class="type">int</span> row <span class="operator">=</span> obj<span class="operator">-</span><span class="operator">></span>row(); <span class="type">int</span> column <span class="operator">=</span> obj<span class="operator">-</span><span class="operator">></span>column(); <span class="type">int</span> rowSpan <span class="operator">=</span> obj<span class="operator">-</span><span class="operator">></span>rowSpan(); <span class="type">int</span> columnSpan <span class="operator">=</span> obj<span class="operator">-</span><span class="operator">></span>columnSpan(); <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Alignment alignment <span class="operator">=</span> obj<span class="operator">-</span><span class="operator">></span>alignment(); <span class="keyword">if</span> (row <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span> <span class="operator">|</span><span class="operator">|</span> column <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) { <a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"Must set row and column for an item in a grid layout"</span>; <span class="keyword">return</span>; } <span class="keyword">if</span> (obj<span class="operator">-</span><span class="operator">></span>rowSpacing() <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) setRowSpacing(row<span class="operator">,</span> obj<span class="operator">-</span><span class="operator">></span>rowSpacing()); <span class="keyword">if</span> (obj<span class="operator">-</span><span class="operator">></span>columnSpacing() <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) setColumnSpacing(column<span class="operator">,</span> obj<span class="operator">-</span><span class="operator">></span>columnSpacing()); <span class="keyword">if</span> (obj<span class="operator">-</span><span class="operator">></span>rowStretchFactor() <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) setRowStretchFactor(row<span class="operator">,</span> obj<span class="operator">-</span><span class="operator">></span>rowStretchFactor()); <span class="keyword">if</span> (obj<span class="operator">-</span><span class="operator">></span>columnStretchFactor() <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) setColumnStretchFactor(column<span class="operator">,</span> obj<span class="operator">-</span><span class="operator">></span>columnStretchFactor()); <span class="keyword">if</span> (obj<span class="operator">-</span><span class="operator">></span>rowPreferredHeight() <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) setRowPreferredHeight(row<span class="operator">,</span> obj<span class="operator">-</span><span class="operator">></span>rowPreferredHeight()); <span class="keyword">if</span> (obj<span class="operator">-</span><span class="operator">></span>rowMaximumHeight() <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) setRowMaximumHeight(row<span class="operator">,</span> obj<span class="operator">-</span><span class="operator">></span>rowMaximumHeight()); <span class="keyword">if</span> (obj<span class="operator">-</span><span class="operator">></span>rowMinimumHeight() <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) setRowMinimumHeight(row<span class="operator">,</span> obj<span class="operator">-</span><span class="operator">></span>rowMinimumHeight()); <span class="keyword">if</span> (obj<span class="operator">-</span><span class="operator">></span>rowFixedHeight() <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) setRowFixedHeight(row<span class="operator">,</span> obj<span class="operator">-</span><span class="operator">></span>rowFixedHeight()); <span class="keyword">if</span> (obj<span class="operator">-</span><span class="operator">></span>columnPreferredWidth() <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) setColumnPreferredWidth(row<span class="operator">,</span> obj<span class="operator">-</span><span class="operator">></span>columnPreferredWidth()); <span class="keyword">if</span> (obj<span class="operator">-</span><span class="operator">></span>columnMaximumWidth() <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) setColumnMaximumWidth(row<span class="operator">,</span> obj<span class="operator">-</span><span class="operator">></span>columnMaximumWidth()); <span class="keyword">if</span> (obj<span class="operator">-</span><span class="operator">></span>columnMinimumWidth() <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) setColumnMinimumWidth(row<span class="operator">,</span> obj<span class="operator">-</span><span class="operator">></span>columnMinimumWidth()); <span class="keyword">if</span> (obj<span class="operator">-</span><span class="operator">></span>columnFixedWidth() <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) setColumnFixedWidth(row<span class="operator">,</span> obj<span class="operator">-</span><span class="operator">></span>columnFixedWidth()); addItem(item<span class="operator">,</span> row<span class="operator">,</span> column<span class="operator">,</span> rowSpan<span class="operator">,</span> columnSpan); <span class="keyword">if</span> (alignment <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) setAlignment(item<span class="operator">,</span> alignment); <span class="type"><a href="qobject.html">QObject</a></span><span class="operator">::</span>connect(obj<span class="operator">,</span> SIGNAL(alignmentChanged(<span class="type"><a href="qgraphicslayoutitem.html">QGraphicsLayoutItem</a></span><span class="operator">*</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Alignment))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(updateAlignment(<span class="type"><a href="qgraphicslayoutitem.html">QGraphicsLayoutItem</a></span><span class="operator">*</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Alignment))); } } <span class="type">void</span> GraphicsGridLayoutObject<span class="operator">::</span>removeAt(<span class="type">int</span> index) { <span class="type"><a href="qgraphicslayoutitem.html">QGraphicsLayoutItem</a></span> <span class="operator">*</span>item <span class="operator">=</span> itemAt(index); <span class="keyword">if</span> (item) { GridLayoutAttached <span class="operator">*</span>obj <span class="operator">=</span> attachedProperties<span class="operator">.</span>value(item); obj<span class="operator">-</span><span class="operator">></span>disconnect(<span class="keyword">this</span>); attachedProperties<span class="operator">.</span>remove(item); } <span class="type"><a href="qgraphicsgridlayout.html">QGraphicsGridLayout</a></span><span class="operator">::</span>removeAt(index); } <span class="type">void</span> GraphicsGridLayoutObject<span class="operator">::</span>clearChildren() { <span class="comment">// do not delete the removed items; they will be deleted by the QML engine</span> <span class="keyword">while</span> (count() <span class="operator">></span> <span class="number">0</span>) removeAt(count()<span class="operator">-</span><span class="number">1</span>); } <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> GraphicsGridLayoutObject<span class="operator">::</span>spacing() <span class="keyword">const</span> { <span class="keyword">if</span> (verticalSpacing() <span class="operator">=</span><span class="operator">=</span> horizontalSpacing()) <span class="keyword">return</span> verticalSpacing(); <span class="keyword">return</span> <span class="operator">-</span><span class="number">1</span>; } <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> GraphicsGridLayoutObject<span class="operator">::</span>contentsMargin() <span class="keyword">const</span> { <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> a<span class="operator">,</span> b<span class="operator">,</span> c<span class="operator">,</span> d; getContentsMargins(<span class="operator">&</span>a<span class="operator">,</span> <span class="operator">&</span>b<span class="operator">,</span> <span class="operator">&</span>c<span class="operator">,</span> <span class="operator">&</span>d); <span class="keyword">if</span> (a <span class="operator">=</span><span class="operator">=</span> b <span class="operator">&</span><span class="operator">&</span> a <span class="operator">=</span><span class="operator">=</span> c <span class="operator">&</span><span class="operator">&</span> a <span class="operator">=</span><span class="operator">=</span> d) <span class="keyword">return</span> a; <span class="keyword">return</span> <span class="operator">-</span><span class="number">1</span>; } <span class="type">void</span> GraphicsGridLayoutObject<span class="operator">::</span>setContentsMargin(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m) { setContentsMargins(m<span class="operator">,</span> m<span class="operator">,</span> m<span class="operator">,</span> m); } <span class="type">void</span> GraphicsGridLayoutObject<span class="operator">::</span>updateAlignment(<span class="type"><a href="qgraphicslayoutitem.html">QGraphicsLayoutItem</a></span> <span class="operator">*</span>item<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Alignment alignment) { <span class="type"><a href="qgraphicsgridlayout.html">QGraphicsGridLayout</a></span><span class="operator">::</span>setAlignment(item<span class="operator">,</span> alignment); } GridLayoutAttached <span class="operator">*</span>GraphicsGridLayoutObject<span class="operator">::</span>qmlAttachedProperties(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>obj) { GridLayoutAttached <span class="operator">*</span>rv <span class="operator">=</span> <span class="keyword">new</span> GridLayoutAttached(obj); <span class="keyword">if</span> (qobject_cast<span class="operator"><</span><span class="type"><a href="qgraphicslayoutitem.html">QGraphicsLayoutItem</a></span><span class="operator">*</span><span class="operator">></span>(obj)) attachedProperties<span class="operator">.</span>insert(qobject_cast<span class="operator"><</span><span class="type"><a href="qgraphicslayoutitem.html">QGraphicsLayoutItem</a></span><span class="operator">*</span><span class="operator">></span>(obj)<span class="operator">,</span> rv); <span class="keyword">return</span> rv; }</pre> </div> <!-- @@@declarative/cppextensions/qgraphicslayouts/qgraphicsgridlayout/gridlayout.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. 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