<?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>piecesmodel.cpp Example File | Qt Widgets 5.9</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 5.9</td><td ><a href="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-itemviews-puzzle-example.html">Item Views Puzzle Example</a></td><td >piecesmodel.cpp Example File</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</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">piecesmodel.cpp Example File</h1>
<span class="subtitle">itemviews/puzzle/piecesmodel.cpp</span>
<!-- $$$itemviews/puzzle/piecesmodel.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 "piecesmodel.h"</span>
<span class="preprocessor">#include <QIcon></span>
<span class="preprocessor">#include <QMimeData></span>
PiecesModel<span class="operator">::</span>PiecesModel(<span class="type">int</span> pieceSize<span class="operator">,</span> <span class="type"><a href="../qtcore/qobject.html">QObject</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="../qtcore/qabstractlistmodel.html">QAbstractListModel</a></span>(parent)<span class="operator">,</span> m_PieceSize(pieceSize)
{
}
<span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> PiecesModel<span class="operator">::</span>data(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>index<span class="operator">,</span> <span class="type">int</span> role) <span class="keyword">const</span>
{
<span class="keyword">if</span> (<span class="operator">!</span>index<span class="operator">.</span>isValid())
<span class="keyword">return</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>();
<span class="keyword">if</span> (role <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>DecorationRole)
<span class="keyword">return</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span>(pixmaps<span class="operator">.</span>value(index<span class="operator">.</span>row())<span class="operator">.</span>scaled(m_PieceSize<span class="operator">,</span> m_PieceSize<span class="operator">,</span>
<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>KeepAspectRatio<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>SmoothTransformation));
<span class="keyword">else</span> <span class="keyword">if</span> (role <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>UserRole)
<span class="keyword">return</span> pixmaps<span class="operator">.</span>value(index<span class="operator">.</span>row());
<span class="keyword">else</span> <span class="keyword">if</span> (role <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>UserRole <span class="operator">+</span> <span class="number">1</span>)
<span class="keyword">return</span> locations<span class="operator">.</span>value(index<span class="operator">.</span>row());
<span class="keyword">return</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>();
}
<span class="type">void</span> PiecesModel<span class="operator">::</span>addPiece(<span class="keyword">const</span> <span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span> <span class="operator">&</span>pixmap<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span> <span class="operator">&</span>location)
{
<span class="type">int</span> row;
<span class="keyword">if</span> (<span class="type">int</span>(<span class="number">2.0</span> <span class="operator">*</span> qrand() <span class="operator">/</span> (RAND_MAX <span class="operator">+</span> <span class="number">1.0</span>)) <span class="operator">=</span><span class="operator">=</span> <span class="number">1</span>)
row <span class="operator">=</span> <span class="number">0</span>;
<span class="keyword">else</span>
row <span class="operator">=</span> pixmaps<span class="operator">.</span>size();
beginInsertRows(<span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span>()<span class="operator">,</span> row<span class="operator">,</span> row);
pixmaps<span class="operator">.</span>insert(row<span class="operator">,</span> pixmap);
locations<span class="operator">.</span>insert(row<span class="operator">,</span> location);
endInsertRows();
}
<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ItemFlags PiecesModel<span class="operator">::</span>flags(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>index) <span class="keyword">const</span>
{
<span class="keyword">if</span> (index<span class="operator">.</span>isValid())
<span class="keyword">return</span> (<span class="type"><a href="../qtcore/qabstractlistmodel.html">QAbstractListModel</a></span><span class="operator">::</span>flags(index)<span class="operator">|</span><span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ItemIsDragEnabled);
<span class="keyword">return</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ItemIsDropEnabled;
}
bool PiecesModel<span class="operator">::</span>removeRows(<span class="type">int</span> row<span class="operator">,</span> <span class="type">int</span> count<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>parent)
{
<span class="keyword">if</span> (parent<span class="operator">.</span>isValid())
<span class="keyword">return</span> <span class="keyword">false</span>;
<span class="keyword">if</span> (row <span class="operator">></span><span class="operator">=</span> pixmaps<span class="operator">.</span>size() <span class="operator">|</span><span class="operator">|</span> row <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="keyword">false</span>;
<span class="type">int</span> beginRow <span class="operator">=</span> <a href="../qtcore/qtglobal.html#qMax">qMax</a>(<span class="number">0</span><span class="operator">,</span> row);
<span class="type">int</span> endRow <span class="operator">=</span> <a href="../qtcore/qtglobal.html#qMin">qMin</a>(row <span class="operator">+</span> count <span class="operator">-</span> <span class="number">1</span><span class="operator">,</span> pixmaps<span class="operator">.</span>size() <span class="operator">-</span> <span class="number">1</span>);
beginRemoveRows(parent<span class="operator">,</span> beginRow<span class="operator">,</span> endRow);
<span class="keyword">while</span> (beginRow <span class="operator"><</span><span class="operator">=</span> endRow) {
pixmaps<span class="operator">.</span>removeAt(beginRow);
locations<span class="operator">.</span>removeAt(beginRow);
<span class="operator">+</span><span class="operator">+</span>beginRow;
}
endRemoveRows();
<span class="keyword">return</span> <span class="keyword">true</span>;
}
<span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> PiecesModel<span class="operator">::</span>mimeTypes() <span class="keyword">const</span>
{
<span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> types;
types <span class="operator"><</span><span class="operator"><</span> <span class="string">"image/x-puzzle-piece"</span>;
<span class="keyword">return</span> types;
}
<span class="type"><a href="../qtcore/qmimedata.html">QMimeData</a></span> <span class="operator">*</span>PiecesModel<span class="operator">::</span>mimeData(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html#QModelIndexList-typedef">QModelIndexList</a></span> <span class="operator">&</span>indexes) <span class="keyword">const</span>
{
<span class="type"><a href="../qtcore/qmimedata.html">QMimeData</a></span> <span class="operator">*</span>mimeData <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qmimedata.html">QMimeData</a></span>();
<span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> encodedData;
<span class="type"><a href="../qtcore/qdatastream.html">QDataStream</a></span> stream(<span class="operator">&</span>encodedData<span class="operator">,</span> <span class="type"><a href="../qtcore/qiodevice.html">QIODevice</a></span><span class="operator">::</span>WriteOnly);
foreach (<span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> index<span class="operator">,</span> indexes) {
<span class="keyword">if</span> (index<span class="operator">.</span>isValid()) {
<span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span> pixmap <span class="operator">=</span> qvariant_cast<span class="operator"><</span><span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span><span class="operator">></span>(data(index<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>UserRole));
<span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span> location <span class="operator">=</span> data(index<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>UserRole<span class="operator">+</span><span class="number">1</span>)<span class="operator">.</span>toPoint();
stream <span class="operator"><</span><span class="operator"><</span> pixmap <span class="operator"><</span><span class="operator"><</span> location;
}
}
mimeData<span class="operator">-</span><span class="operator">></span>setData(<span class="string">"image/x-puzzle-piece"</span><span class="operator">,</span> encodedData);
<span class="keyword">return</span> mimeData;
}
bool PiecesModel<span class="operator">::</span>dropMimeData(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmimedata.html">QMimeData</a></span> <span class="operator">*</span>data<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>DropAction action<span class="operator">,</span>
<span class="type">int</span> row<span class="operator">,</span> <span class="type">int</span> column<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>parent)
{
<span class="keyword">if</span> (<span class="operator">!</span>data<span class="operator">-</span><span class="operator">></span>hasFormat(<span class="string">"image/x-puzzle-piece"</span>))
<span class="keyword">return</span> <span class="keyword">false</span>;
<span class="keyword">if</span> (action <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>IgnoreAction)
<span class="keyword">return</span> <span class="keyword">true</span>;
<span class="keyword">if</span> (column <span class="operator">></span> <span class="number">0</span>)
<span class="keyword">return</span> <span class="keyword">false</span>;
<span class="type">int</span> endRow;
<span class="keyword">if</span> (<span class="operator">!</span>parent<span class="operator">.</span>isValid()) {
<span class="keyword">if</span> (row <span class="operator"><</span> <span class="number">0</span>)
endRow <span class="operator">=</span> pixmaps<span class="operator">.</span>size();
<span class="keyword">else</span>
endRow <span class="operator">=</span> <a href="../qtcore/qtglobal.html#qMin">qMin</a>(row<span class="operator">,</span> pixmaps<span class="operator">.</span>size());
} <span class="keyword">else</span> {
endRow <span class="operator">=</span> parent<span class="operator">.</span>row();
}
<span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> encodedData <span class="operator">=</span> data<span class="operator">-</span><span class="operator">></span>data(<span class="string">"image/x-puzzle-piece"</span>);
<span class="type"><a href="../qtcore/qdatastream.html">QDataStream</a></span> stream(<span class="operator">&</span>encodedData<span class="operator">,</span> <span class="type"><a href="../qtcore/qiodevice.html">QIODevice</a></span><span class="operator">::</span>ReadOnly);
<span class="keyword">while</span> (<span class="operator">!</span>stream<span class="operator">.</span>atEnd()) {
<span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span> pixmap;
<span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span> location;
stream <span class="operator">></span><span class="operator">></span> pixmap <span class="operator">></span><span class="operator">></span> location;
beginInsertRows(<span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span>()<span class="operator">,</span> endRow<span class="operator">,</span> endRow);
pixmaps<span class="operator">.</span>insert(endRow<span class="operator">,</span> pixmap);
locations<span class="operator">.</span>insert(endRow<span class="operator">,</span> location);
endInsertRows();
<span class="operator">+</span><span class="operator">+</span>endRow;
}
<span class="keyword">return</span> <span class="keyword">true</span>;
}
<span class="type">int</span> PiecesModel<span class="operator">::</span>rowCount(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>parent) <span class="keyword">const</span>
{
<span class="keyword">if</span> (parent<span class="operator">.</span>isValid())
<span class="keyword">return</span> <span class="number">0</span>;
<span class="keyword">else</span>
<span class="keyword">return</span> pixmaps<span class="operator">.</span>size();
}
<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>DropActions PiecesModel<span class="operator">::</span>supportedDropActions() <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>CopyAction <span class="operator">|</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>MoveAction;
}
<span class="type">void</span> PiecesModel<span class="operator">::</span>addPieces(<span class="keyword">const</span> <span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span><span class="operator">&</span> pixmap)
{
beginRemoveRows(<span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span>()<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">24</span>);
pixmaps<span class="operator">.</span>clear();
locations<span class="operator">.</span>clear();
endRemoveRows();
<span class="keyword">for</span> (<span class="type">int</span> y <span class="operator">=</span> <span class="number">0</span>; y <span class="operator"><</span> <span class="number">5</span>; <span class="operator">+</span><span class="operator">+</span>y) {
<span class="keyword">for</span> (<span class="type">int</span> x <span class="operator">=</span> <span class="number">0</span>; x <span class="operator"><</span> <span class="number">5</span>; <span class="operator">+</span><span class="operator">+</span>x) {
<span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span> pieceImage <span class="operator">=</span> pixmap<span class="operator">.</span>copy(x<span class="operator">*</span>m_PieceSize<span class="operator">,</span> y<span class="operator">*</span>m_PieceSize<span class="operator">,</span> m_PieceSize<span class="operator">,</span> m_PieceSize);
addPiece(pieceImage<span class="operator">,</span> <span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span>(x<span class="operator">,</span> y));
}
}
}
</pre>
</div>
<!-- @@@itemviews/puzzle/piecesmodel.cpp -->
</div>
</div>
</div>
</div>
</div>
<div class="footer">
<p>
<acronym title="Copyright">©</acronym> 2017 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>
distrib
>
Mageia
>
6
>
armv5tl
>
media
>
core-updates
>
by-pkgid
>
768f7d9f703884aa2562bf0a651086df
>
files
>
4038
