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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">mainwindow.cpp Example File</h1> <span class="small-subtitle">painting/fontsampler/mainwindow.cpp</span> <!-- $$$painting/fontsampler/mainwindow.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 "mainwindow.h"</span> MainWindow<span class="operator">::</span>MainWindow(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qmainwindow.html">QMainWindow</a></span>(parent) { setupUi(<span class="keyword">this</span>); <span class="preprocessor">#if defined(Q_OS_SYMBIAN)</span> addDockWidget(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>BottomDockWidgetArea<span class="operator">,</span> dockWidget); <span class="preprocessor">#endif</span> sampleSizes <span class="operator"><</span><span class="operator"><</span> <span class="number">32</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">24</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">16</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">14</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">12</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">8</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">4</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">2</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">1</span>; markedCount <span class="operator">=</span> <span class="number">0</span>; setupFontTree(); connect(quitAction<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> qApp<span class="operator">,</span> SLOT(quit())); connect(fontTree<span class="operator">,</span> SIGNAL(currentItemChanged(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span><span class="operator">*</span><span class="operator">,</span><span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span><span class="operator">*</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(showFont(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span><span class="operator">*</span>))); connect(fontTree<span class="operator">,</span> SIGNAL(itemChanged(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span><span class="operator">*</span><span class="operator">,</span><span class="type">int</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(updateStyles(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span><span class="operator">*</span><span class="operator">,</span><span class="type">int</span>))); fontTree<span class="operator">-</span><span class="operator">></span>setItemSelected(fontTree<span class="operator">-</span><span class="operator">></span>topLevelItem(<span class="number">0</span>)<span class="operator">,</span> <span class="keyword">true</span>); showFont(fontTree<span class="operator">-</span><span class="operator">></span>topLevelItem(<span class="number">0</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>setupFontTree() { <span class="type"><a href="qfontdatabase.html">QFontDatabase</a></span> database; fontTree<span class="operator">-</span><span class="operator">></span>setColumnCount(<span class="number">1</span>); fontTree<span class="operator">-</span><span class="operator">></span>setHeaderLabels(<span class="type"><a href="qstringlist.html">QStringList</a></span>() <span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"Font"</span>)); foreach (<span class="type"><a href="qstring.html">QString</a></span> family<span class="operator">,</span> database<span class="operator">.</span>families()) { <span class="keyword">const</span> <span class="type"><a href="qstringlist.html">QStringList</a></span> styles <span class="operator">=</span> database<span class="operator">.</span>styles(family); <span class="keyword">if</span> (styles<span class="operator">.</span>isEmpty()) <span class="keyword">continue</span>; <span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>familyItem <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span>(fontTree); familyItem<span class="operator">-</span><span class="operator">></span>setText(<span class="number">0</span><span class="operator">,</span> family); familyItem<span class="operator">-</span><span class="operator">></span>setCheckState(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Unchecked); foreach (<span class="type"><a href="qstring.html">QString</a></span> style<span class="operator">,</span> styles) { <span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>styleItem <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span>(familyItem); styleItem<span class="operator">-</span><span class="operator">></span>setText(<span class="number">0</span><span class="operator">,</span> style); styleItem<span class="operator">-</span><span class="operator">></span>setCheckState(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Unchecked); styleItem<span class="operator">-</span><span class="operator">></span>setData(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>UserRole<span class="operator">,</span> <span class="type"><a href="qvariant.html">QVariant</a></span>(database<span class="operator">.</span>weight(family<span class="operator">,</span> style))); styleItem<span class="operator">-</span><span class="operator">></span>setData(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>UserRole <span class="operator">+</span> <span class="number">1</span><span class="operator">,</span> <span class="type"><a href="qvariant.html">QVariant</a></span>(database<span class="operator">.</span>italic(family<span class="operator">,</span> style))); } } } <span class="type">void</span> MainWindow<span class="operator">::</span>on_clearAction_triggered() { <span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>currentItem <span class="operator">=</span> fontTree<span class="operator">-</span><span class="operator">></span>currentItem(); foreach (<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>item<span class="operator">,</span> fontTree<span class="operator">-</span><span class="operator">></span>selectedItems()) fontTree<span class="operator">-</span><span class="operator">></span>setItemSelected(item<span class="operator">,</span> <span class="keyword">false</span>); fontTree<span class="operator">-</span><span class="operator">></span>setItemSelected(currentItem<span class="operator">,</span> <span class="keyword">true</span>); } <span class="type">void</span> MainWindow<span class="operator">::</span>on_markAction_triggered() { markUnmarkFonts(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Checked); } <span class="type">void</span> MainWindow<span class="operator">::</span>on_unmarkAction_triggered() { markUnmarkFonts(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Unchecked); } <span class="type">void</span> MainWindow<span class="operator">::</span>markUnmarkFonts(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CheckState state) { <span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span><span class="operator">></span> items <span class="operator">=</span> fontTree<span class="operator">-</span><span class="operator">></span>selectedItems(); foreach (<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>item<span class="operator">,</span> items) { <span class="keyword">if</span> (item<span class="operator">-</span><span class="operator">></span>checkState(<span class="number">0</span>) <span class="operator">!</span><span class="operator">=</span> state) item<span class="operator">-</span><span class="operator">></span>setCheckState(<span class="number">0</span><span class="operator">,</span> state); } } <span class="type">void</span> MainWindow<span class="operator">::</span>showFont(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>item) { <span class="keyword">if</span> (<span class="operator">!</span>item) <span class="keyword">return</span>; <span class="type"><a href="qstring.html">QString</a></span> family; <span class="type"><a href="qstring.html">QString</a></span> style; <span class="type">int</span> weight; <span class="type">bool</span> italic; <span class="keyword">if</span> (item<span class="operator">-</span><span class="operator">></span>parent()) { family <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>parent()<span class="operator">-</span><span class="operator">></span>text(<span class="number">0</span>); style <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>text(<span class="number">0</span>); weight <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>data(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>UserRole)<span class="operator">.</span>toInt(); italic <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>data(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>UserRole <span class="operator">+</span> <span class="number">1</span>)<span class="operator">.</span>toBool(); } <span class="keyword">else</span> { family <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>text(<span class="number">0</span>); style <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>child(<span class="number">0</span>)<span class="operator">-</span><span class="operator">></span>text(<span class="number">0</span>); weight <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>child(<span class="number">0</span>)<span class="operator">-</span><span class="operator">></span>data(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>UserRole)<span class="operator">.</span>toInt(); italic <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>child(<span class="number">0</span>)<span class="operator">-</span><span class="operator">></span>data(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>UserRole <span class="operator">+</span> <span class="number">1</span>)<span class="operator">.</span>toBool(); } <span class="type"><a href="qstring.html">QString</a></span> oldText <span class="operator">=</span> textEdit<span class="operator">-</span><span class="operator">></span>toPlainText()<span class="operator">.</span>trimmed(); <span class="type">bool</span> modified <span class="operator">=</span> textEdit<span class="operator">-</span><span class="operator">></span>document()<span class="operator">-</span><span class="operator">></span>isModified(); textEdit<span class="operator">-</span><span class="operator">></span>clear(); <span class="preprocessor">#if defined(Q_OS_SYMBIAN)</span> textEdit<span class="operator">-</span><span class="operator">></span>document()<span class="operator">-</span><span class="operator">></span>setDefaultFont(<span class="type"><a href="qfont.html">QFont</a></span>(family<span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> weight<span class="operator">,</span> italic)); <span class="preprocessor">#else</span> textEdit<span class="operator">-</span><span class="operator">></span>document()<span class="operator">-</span><span class="operator">></span>setDefaultFont(<span class="type"><a href="qfont.html">QFont</a></span>(family<span class="operator">,</span> <span class="number">32</span><span class="operator">,</span> weight<span class="operator">,</span> italic)); <span class="preprocessor">#endif</span> <span class="type"><a href="qtextcursor.html">QTextCursor</a></span> cursor <span class="operator">=</span> textEdit<span class="operator">-</span><span class="operator">></span>textCursor(); <span class="type"><a href="qtextblockformat.html">QTextBlockFormat</a></span> blockFormat; blockFormat<span class="operator">.</span>setAlignment(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignCenter); cursor<span class="operator">.</span>insertBlock(blockFormat); <span class="keyword">if</span> (modified) cursor<span class="operator">.</span>insertText(<span class="type"><a href="qstring.html">QString</a></span>(oldText)); <span class="keyword">else</span> cursor<span class="operator">.</span>insertText(<span class="type"><a href="qstring.html">QString</a></span>(<span class="string">"%1 %2"</span>)<span class="operator">.</span>arg(family)<span class="operator">.</span>arg(style)); textEdit<span class="operator">-</span><span class="operator">></span>document()<span class="operator">-</span><span class="operator">></span>setModified(modified); } <span class="type">void</span> MainWindow<span class="operator">::</span>updateStyles(<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>item<span class="operator">,</span> <span class="type">int</span> column) { <span class="keyword">if</span> (<span class="operator">!</span>item <span class="operator">|</span><span class="operator">|</span> column <span class="operator">!</span><span class="operator">=</span> <span class="number">0</span>) <span class="keyword">return</span>; <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CheckState state <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>checkState(<span class="number">0</span>); <span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>parent <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>parent(); <span class="keyword">if</span> (parent) { <span class="comment">// Only count style items.</span> <span class="keyword">if</span> (state <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Checked) <span class="operator">+</span><span class="operator">+</span>markedCount; <span class="keyword">else</span> <span class="operator">-</span><span class="operator">-</span>markedCount; <span class="keyword">if</span> (state <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Checked <span class="operator">&</span><span class="operator">&</span> parent<span class="operator">-</span><span class="operator">></span>checkState(<span class="number">0</span>) <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Unchecked) { <span class="comment">// Mark parent items when child items are checked.</span> parent<span class="operator">-</span><span class="operator">></span>setCheckState(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Checked); } <span class="keyword">else</span> <span class="keyword">if</span> (state <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Unchecked <span class="operator">&</span><span class="operator">&</span> parent<span class="operator">-</span><span class="operator">></span>checkState(<span class="number">0</span>) <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Checked) { <span class="type">bool</span> marked <span class="operator">=</span> <span class="keyword">false</span>; <span class="keyword">for</span> (<span class="type">int</span> row <span class="operator">=</span> <span class="number">0</span>; row <span class="operator"><</span> parent<span class="operator">-</span><span class="operator">></span>childCount(); <span class="operator">+</span><span class="operator">+</span>row) { <span class="keyword">if</span> (parent<span class="operator">-</span><span class="operator">></span>child(row)<span class="operator">-</span><span class="operator">></span>checkState(<span class="number">0</span>) <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Checked) { marked <span class="operator">=</span> <span class="keyword">true</span>; <span class="keyword">break</span>; } } <span class="comment">// Unmark parent items when all child items are unchecked.</span> <span class="keyword">if</span> (<span class="operator">!</span>marked) parent<span class="operator">-</span><span class="operator">></span>setCheckState(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Unchecked); } } <span class="keyword">else</span> { <span class="type">int</span> row; <span class="type">int</span> number <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">for</span> (row <span class="operator">=</span> <span class="number">0</span>; row <span class="operator"><</span> item<span class="operator">-</span><span class="operator">></span>childCount(); <span class="operator">+</span><span class="operator">+</span>row) { <span class="keyword">if</span> (item<span class="operator">-</span><span class="operator">></span>child(row)<span class="operator">-</span><span class="operator">></span>checkState(<span class="number">0</span>) <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Checked) <span class="operator">+</span><span class="operator">+</span>number; } <span class="comment">// Mark/unmark all child items when marking/unmarking top-level</span> <span class="comment">// items.</span> <span class="keyword">if</span> (state <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Checked <span class="operator">&</span><span class="operator">&</span> number <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) { <span class="keyword">for</span> (row <span class="operator">=</span> <span class="number">0</span>; row <span class="operator"><</span> item<span class="operator">-</span><span class="operator">></span>childCount(); <span class="operator">+</span><span class="operator">+</span>row) { <span class="keyword">if</span> (item<span class="operator">-</span><span class="operator">></span>child(row)<span class="operator">-</span><span class="operator">></span>checkState(<span class="number">0</span>) <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Unchecked) item<span class="operator">-</span><span class="operator">></span>child(row)<span class="operator">-</span><span class="operator">></span>setCheckState(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Checked); } } <span class="keyword">else</span> <span class="keyword">if</span> (state <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Unchecked <span class="operator">&</span><span class="operator">&</span> number <span class="operator">></span> <span class="number">0</span>) { <span class="keyword">for</span> (row <span class="operator">=</span> <span class="number">0</span>; row <span class="operator"><</span> item<span class="operator">-</span><span class="operator">></span>childCount(); <span class="operator">+</span><span class="operator">+</span>row) { <span class="keyword">if</span> (item<span class="operator">-</span><span class="operator">></span>child(row)<span class="operator">-</span><span class="operator">></span>checkState(<span class="number">0</span>) <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Checked) item<span class="operator">-</span><span class="operator">></span>child(row)<span class="operator">-</span><span class="operator">></span>setCheckState(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Unchecked); } } } printAction<span class="operator">-</span><span class="operator">></span>setEnabled(markedCount <span class="operator">></span> <span class="number">0</span>); printPreviewAction<span class="operator">-</span><span class="operator">></span>setEnabled(markedCount <span class="operator">></span> <span class="number">0</span>); } <span class="type"><a href="qmap.html">QMap</a></span><span class="operator"><</span><span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span> StyleItems<span class="operator">></span> MainWindow<span class="operator">::</span>currentPageMap() { <span class="type"><a href="qmap.html">QMap</a></span><span class="operator"><</span><span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span> StyleItems<span class="operator">></span> pageMap; <span class="keyword">for</span> (<span class="type">int</span> row <span class="operator">=</span> <span class="number">0</span>; row <span class="operator"><</span> fontTree<span class="operator">-</span><span class="operator">></span>topLevelItemCount(); <span class="operator">+</span><span class="operator">+</span>row) { <span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>familyItem <span class="operator">=</span> fontTree<span class="operator">-</span><span class="operator">></span>topLevelItem(row); <span class="type"><a href="qstring.html">QString</a></span> family; <span class="keyword">if</span> (familyItem<span class="operator">-</span><span class="operator">></span>checkState(<span class="number">0</span>) <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Checked) { family <span class="operator">=</span> familyItem<span class="operator">-</span><span class="operator">></span>text(<span class="number">0</span>); pageMap<span class="operator">[</span>family<span class="operator">]</span> <span class="operator">=</span> StyleItems(); } <span class="keyword">for</span> (<span class="type">int</span> childRow <span class="operator">=</span> <span class="number">0</span>; childRow <span class="operator"><</span> familyItem<span class="operator">-</span><span class="operator">></span>childCount(); <span class="operator">+</span><span class="operator">+</span>childRow) { <span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>styleItem <span class="operator">=</span> familyItem<span class="operator">-</span><span class="operator">></span>child(childRow); <span class="keyword">if</span> (styleItem<span class="operator">-</span><span class="operator">></span>checkState(<span class="number">0</span>) <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Checked) pageMap<span class="operator">[</span>family<span class="operator">]</span><span class="operator">.</span>append(styleItem); } } <span class="keyword">return</span> pageMap; } <span class="preprocessor">#ifndef QT_NO_PRINTER</span> <span class="type">void</span> MainWindow<span class="operator">::</span>on_printAction_triggered() { pageMap <span class="operator">=</span> currentPageMap(); <span class="keyword">if</span> (pageMap<span class="operator">.</span>count() <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) <span class="keyword">return</span>; <span class="type"><a href="qprinter.html">QPrinter</a></span> printer(<span class="type"><a href="qprinter.html">QPrinter</a></span><span class="operator">::</span>HighResolution); <span class="type"><a href="qprintdialog.html">QPrintDialog</a></span> dialog(<span class="operator">&</span>printer<span class="operator">,</span> <span class="keyword">this</span>); <span class="keyword">if</span> (dialog<span class="operator">.</span>exec() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qdialog.html">QDialog</a></span><span class="operator">::</span>Accepted) <span class="keyword">return</span>; <span class="type">int</span> from <span class="operator">=</span> printer<span class="operator">.</span>fromPage(); <span class="type">int</span> to <span class="operator">=</span> printer<span class="operator">.</span>toPage(); <span class="keyword">if</span> (from <span class="operator"><</span><span class="operator">=</span> <span class="number">0</span> <span class="operator">&</span><span class="operator">&</span> to <span class="operator"><</span><span class="operator">=</span> <span class="number">0</span>) printer<span class="operator">.</span>setFromTo(<span class="number">1</span><span class="operator">,</span> pageMap<span class="operator">.</span>keys()<span class="operator">.</span>count()); printDocument(<span class="operator">&</span>printer); } <span class="type">void</span> MainWindow<span class="operator">::</span>printDocument(<span class="type"><a href="qprinter.html">QPrinter</a></span> <span class="operator">*</span>printer) { printer<span class="operator">-</span><span class="operator">></span>setFromTo(<span class="number">1</span><span class="operator">,</span> pageMap<span class="operator">.</span>count()); <span class="type"><a href="qprogressdialog.html">QProgressDialog</a></span> progress(tr(<span class="string">"Preparing font samples..."</span>)<span class="operator">,</span> tr(<span class="string">"&Cancel"</span>)<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> pageMap<span class="operator">.</span>count()<span class="operator">,</span> <span class="keyword">this</span>); progress<span class="operator">.</span>setWindowModality(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ApplicationModal); progress<span class="operator">.</span>setWindowTitle(tr(<span class="string">"Font Sampler"</span>)); progress<span class="operator">.</span>setMinimum(printer<span class="operator">-</span><span class="operator">></span>fromPage() <span class="operator">-</span> <span class="number">1</span>); progress<span class="operator">.</span>setMaximum(printer<span class="operator">-</span><span class="operator">></span>toPage()); <span class="type"><a href="qpainter.html">QPainter</a></span> painter; painter<span class="operator">.</span>begin(printer); <span class="type">bool</span> firstPage <span class="operator">=</span> <span class="keyword">true</span>; <span class="keyword">for</span> (<span class="type">int</span> page <span class="operator">=</span> printer<span class="operator">-</span><span class="operator">></span>fromPage(); page <span class="operator"><</span><span class="operator">=</span> printer<span class="operator">-</span><span class="operator">></span>toPage(); <span class="operator">+</span><span class="operator">+</span>page) { <span class="keyword">if</span> (<span class="operator">!</span>firstPage) printer<span class="operator">-</span><span class="operator">></span>newPage(); qApp<span class="operator">-</span><span class="operator">></span>processEvents(); <span class="keyword">if</span> (progress<span class="operator">.</span>wasCanceled()) <span class="keyword">break</span>; printPage(page <span class="operator">-</span> <span class="number">1</span><span class="operator">,</span> <span class="operator">&</span>painter<span class="operator">,</span> printer); progress<span class="operator">.</span>setValue(page); firstPage <span class="operator">=</span> <span class="keyword">false</span>; } painter<span class="operator">.</span>end(); } <span class="type">void</span> MainWindow<span class="operator">::</span>on_printPreviewAction_triggered() { pageMap <span class="operator">=</span> currentPageMap(); <span class="keyword">if</span> (pageMap<span class="operator">.</span>count() <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) <span class="keyword">return</span>; <span class="type"><a href="qprinter.html">QPrinter</a></span> printer(<span class="type"><a href="qprinter.html">QPrinter</a></span><span class="operator">::</span>HighResolution); <span class="type"><a href="qprintpreviewdialog.html">QPrintPreviewDialog</a></span> preview(<span class="operator">&</span>printer<span class="operator">,</span> <span class="keyword">this</span>); connect(<span class="operator">&</span>preview<span class="operator">,</span> SIGNAL(paintRequested(<span class="type"><a href="qprinter.html">QPrinter</a></span><span class="operator">*</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(printDocument(<span class="type"><a href="qprinter.html">QPrinter</a></span><span class="operator">*</span>))); preview<span class="operator">.</span>exec(); } <span class="type">void</span> MainWindow<span class="operator">::</span>printPage(<span class="type">int</span> index<span class="operator">,</span> <span class="type"><a href="qpainter.html">QPainter</a></span> <span class="operator">*</span>painter<span class="operator">,</span> <span class="type"><a href="qprinter.html">QPrinter</a></span> <span class="operator">*</span>printer) { <span class="type"><a href="qstring.html">QString</a></span> family <span class="operator">=</span> pageMap<span class="operator">.</span>keys()<span class="operator">[</span>index<span class="operator">]</span>; StyleItems items <span class="operator">=</span> pageMap<span class="operator">[</span>family<span class="operator">]</span>; <span class="comment">// Find the dimensions of the text on each page.</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> width <span class="operator">=</span> <span class="number">0.0</span>; <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> height <span class="operator">=</span> <span class="number">0.0</span>; foreach (<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>item<span class="operator">,</span> items) { <span class="type"><a href="qstring.html">QString</a></span> style <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>text(<span class="number">0</span>); <span class="type">int</span> weight <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>data(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>UserRole)<span class="operator">.</span>toInt(); <span class="type">bool</span> italic <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>data(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>UserRole <span class="operator">+</span> <span class="number">1</span>)<span class="operator">.</span>toBool(); <span class="comment">// Calculate the maximum width and total height of the text.</span> foreach (<span class="type">int</span> size<span class="operator">,</span> sampleSizes) { <span class="type"><a href="qfont.html">QFont</a></span> font(family<span class="operator">,</span> size<span class="operator">,</span> weight<span class="operator">,</span> italic); font <span class="operator">=</span> <span class="type"><a href="qfont.html">QFont</a></span>(font<span class="operator">,</span> painter<span class="operator">-</span><span class="operator">></span>device()); <span class="type"><a href="qfontmetricsf.html">QFontMetricsF</a></span> fontMetrics(font); <span class="type"><a href="qrectf.html">QRectF</a></span> rect <span class="operator">=</span> fontMetrics<span class="operator">.</span>boundingRect( <span class="type"><a href="qstring.html">QString</a></span>(<span class="string">"%1 %2"</span>)<span class="operator">.</span>arg(family)<span class="operator">.</span>arg(style)); width <span class="operator">=</span> <a href="qtglobal.html#qMax">qMax</a>(rect<span class="operator">.</span>width()<span class="operator">,</span> width); height <span class="operator">+</span><span class="operator">=</span> rect<span class="operator">.</span>height(); } } <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> xScale <span class="operator">=</span> printer<span class="operator">-</span><span class="operator">></span>pageRect()<span class="operator">.</span>width() <span class="operator">/</span> width; <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> yScale <span class="operator">=</span> printer<span class="operator">-</span><span class="operator">></span>pageRect()<span class="operator">.</span>height() <span class="operator">/</span> height; <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> scale <span class="operator">=</span> <a href="qtglobal.html#qMin">qMin</a>(xScale<span class="operator">,</span> yScale); <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> remainingHeight <span class="operator">=</span> printer<span class="operator">-</span><span class="operator">></span>pageRect()<span class="operator">.</span>height()<span class="operator">/</span>scale <span class="operator">-</span> height; <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> spaceHeight <span class="operator">=</span> (remainingHeight<span class="operator">/</span><span class="number">4.0</span>) <span class="operator">/</span> (items<span class="operator">.</span>count() <span class="operator">+</span> <span class="number">1</span>); <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> interLineHeight <span class="operator">=</span> (remainingHeight<span class="operator">/</span><span class="number">4.0</span>) <span class="operator">/</span> (sampleSizes<span class="operator">.</span>count() <span class="operator">*</span> items<span class="operator">.</span>count()); painter<span class="operator">-</span><span class="operator">></span>save(); painter<span class="operator">-</span><span class="operator">></span>translate(printer<span class="operator">-</span><span class="operator">></span>pageRect()<span class="operator">.</span>width()<span class="operator">/</span><span class="number">2.0</span><span class="operator">,</span> printer<span class="operator">-</span><span class="operator">></span>pageRect()<span class="operator">.</span>height()<span class="operator">/</span><span class="number">2.0</span>); painter<span class="operator">-</span><span class="operator">></span>scale(scale<span class="operator">,</span> scale); painter<span class="operator">-</span><span class="operator">></span>setBrush(<span class="type"><a href="qbrush.html">QBrush</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>black)); <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x <span class="operator">=</span> <span class="operator">-</span>width<span class="operator">/</span><span class="number">2.0</span>; <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y <span class="operator">=</span> <span class="operator">-</span>height<span class="operator">/</span><span class="number">2.0</span> <span class="operator">-</span> remainingHeight<span class="operator">/</span><span class="number">4.0</span> <span class="operator">+</span> spaceHeight; foreach (<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>item<span class="operator">,</span> items) { <span class="type"><a href="qstring.html">QString</a></span> style <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>text(<span class="number">0</span>); <span class="type">int</span> weight <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>data(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>UserRole)<span class="operator">.</span>toInt(); <span class="type">bool</span> italic <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>data(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>UserRole <span class="operator">+</span> <span class="number">1</span>)<span class="operator">.</span>toBool(); <span class="comment">// Draw each line of text.</span> foreach (<span class="type">int</span> size<span class="operator">,</span> sampleSizes) { <span class="type"><a href="qfont.html">QFont</a></span> font(family<span class="operator">,</span> size<span class="operator">,</span> weight<span class="operator">,</span> italic); font <span class="operator">=</span> <span class="type"><a href="qfont.html">QFont</a></span>(font<span class="operator">,</span> painter<span class="operator">-</span><span class="operator">></span>device()); <span class="type"><a href="qfontmetricsf.html">QFontMetricsF</a></span> fontMetrics(font); <span class="type"><a href="qrectf.html">QRectF</a></span> rect <span class="operator">=</span> fontMetrics<span class="operator">.</span>boundingRect(<span class="type"><a href="qstring.html">QString</a></span>(<span class="string">"%1 %2"</span>)<span class="operator">.</span>arg( font<span class="operator">.</span>family())<span class="operator">.</span>arg(style)); y <span class="operator">+</span><span class="operator">=</span> rect<span class="operator">.</span>height(); painter<span class="operator">-</span><span class="operator">></span>setFont(font); painter<span class="operator">-</span><span class="operator">></span>drawText(<span class="type"><a href="qpointf.html">QPointF</a></span>(x<span class="operator">,</span> y)<span class="operator">,</span> <span class="type"><a href="qstring.html">QString</a></span>(<span class="string">"%1 %2"</span>)<span class="operator">.</span>arg(family)<span class="operator">.</span>arg(style)); y <span class="operator">+</span><span class="operator">=</span> interLineHeight; } y <span class="operator">+</span><span class="operator">=</span> spaceHeight; } painter<span class="operator">-</span><span class="operator">></span>restore(); } <span class="preprocessor">#endif</span></pre> </div> <!-- @@@painting/fontsampler/mainwindow.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>