<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Qt 4.6: piecesmodel.cpp Example File (itemviews/puzzle/piecesmodel.cpp)</title>
<link href="classic.css" rel="stylesheet" type="text/css" />
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td align="left" valign="top" width="32"><a href="http://qt.nokia.com/"><img src="images/qt-logo.png" align="left" border="0" /></a></td>
<td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="functions.html"><font color="#004faf">All Functions</font></a> · <a href="overviews.html"><font color="#004faf">Overviews</font></a></td></tr></table><h1 class="title">piecesmodel.cpp Example File<br /><span class="small-subtitle">itemviews/puzzle/piecesmodel.cpp</span>
</h1>
<pre><span class="comment"> /****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/</span>
#include <QtGui>
#include "piecesmodel.h"
PiecesModel::PiecesModel(QObject *parent)
: QAbstractListModel(parent)
{
}
QVariant PiecesModel::data(const QModelIndex &index, int role) const
{
if (!index.isValid())
return QVariant();
if (role == Qt::DecorationRole)
return QIcon(pixmaps.value(index.row()).scaled(60, 60,
Qt::KeepAspectRatio, Qt::SmoothTransformation));
else if (role == Qt::UserRole)
return pixmaps.value(index.row());
else if (role == Qt::UserRole + 1)
return locations.value(index.row());
return QVariant();
}
void PiecesModel::addPiece(const QPixmap &pixmap, const QPoint &location)
{
int row;
if (int(2.0*qrand()/(RAND_MAX+1.0)) == 1)
row = 0;
else
row = pixmaps.size();
beginInsertRows(QModelIndex(), row, row);
pixmaps.insert(row, pixmap);
locations.insert(row, location);
endInsertRows();
}
Qt::ItemFlags PiecesModel::flags(const QModelIndex &index) const
{
if (index.isValid())
return (Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsDragEnabled);
return Qt::ItemIsDropEnabled;
}
bool PiecesModel::removeRows(int row, int count, const QModelIndex &parent)
{
if (parent.isValid())
return false;
if (row >= pixmaps.size() || row + count <= 0)
return false;
int beginRow = qMax(0, row);
int endRow = qMin(row + count - 1, pixmaps.size() - 1);
beginRemoveRows(parent, beginRow, endRow);
while (beginRow <= endRow) {
pixmaps.removeAt(beginRow);
locations.removeAt(beginRow);
++beginRow;
}
endRemoveRows();
return true;
}
QStringList PiecesModel::mimeTypes() const
{
QStringList types;
types << "image/x-puzzle-piece";
return types;
}
QMimeData *PiecesModel::mimeData(const QModelIndexList &indexes) const
{
QMimeData *mimeData = new QMimeData();
QByteArray encodedData;
QDataStream stream(&encodedData, QIODevice::WriteOnly);
foreach (QModelIndex index, indexes) {
if (index.isValid()) {
QPixmap pixmap = qVariantValue<QPixmap>(data(index, Qt::UserRole));
QPoint location = data(index, Qt::UserRole+1).toPoint();
stream << pixmap << location;
}
}
mimeData->setData("image/x-puzzle-piece", encodedData);
return mimeData;
}
bool PiecesModel::dropMimeData(const QMimeData *data, Qt::DropAction action,
int row, int column, const QModelIndex &parent)
{
if (!data->hasFormat("image/x-puzzle-piece"))
return false;
if (action == Qt::IgnoreAction)
return true;
if (column > 0)
return false;
int endRow;
if (!parent.isValid()) {
if (row < 0)
endRow = pixmaps.size();
else
endRow = qMin(row, pixmaps.size());
} else
endRow = parent.row();
QByteArray encodedData = data->data("image/x-puzzle-piece");
QDataStream stream(&encodedData, QIODevice::ReadOnly);
while (!stream.atEnd()) {
QPixmap pixmap;
QPoint location;
stream >> pixmap >> location;
beginInsertRows(QModelIndex(), endRow, endRow);
pixmaps.insert(endRow, pixmap);
locations.insert(endRow, location);
endInsertRows();
++endRow;
}
return true;
}
int PiecesModel::rowCount(const QModelIndex &parent) const
{
if (parent.isValid())
return 0;
else
return pixmaps.size();
}
Qt::DropActions PiecesModel::supportedDropActions() const
{
return Qt::CopyAction | Qt::MoveAction;
}
void PiecesModel::addPieces(const QPixmap& pixmap)
{
beginRemoveRows(QModelIndex(), 0, 24);
pixmaps.clear();
locations.clear();
endRemoveRows();
for (int y = 0; y < 5; ++y) {
for (int x = 0; x < 5; ++x) {
QPixmap pieceImage = pixmap.copy(x*80, y*80, 80, 80);
addPiece(pieceImage, QPoint(x, y));
}
}
}</pre>
<p /><address><hr /><div align="center">
<table width="100%" cellspacing="0" border="0"><tr class="address">
<td width="40%" align="left">Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)</td>
<td width="20%" align="center"><a href="trademarks.html">Trademarks</a></td>
<td width="40%" align="right"><div align="right">Qt 4.6.3</div></td>
</tr></table></div></address></body>
</html>
distrib
>
Mandriva
>
current
>
i586
>
media
>
main-updates
>
by-pkgid
>
8e6051afcdb111a0317a58fb64c2abf5
>
files
>
2666
