<?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: panel.cpp Example File (graphicsview/padnavigator/panel.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">panel.cpp Example File<br /><span class="small-subtitle">graphicsview/padnavigator/panel.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 "panel.h"
#include "roundrectitem.h"
#include "splashitem.h"
#include "ui_backside.h"
#ifndef QT_NO_OPENGL
#include <QtOpenGL/QtOpenGL>
#else
#endif
#include <QtGui/QtGui>
#include <math.h>
Panel::Panel(int width, int height)
: selectedX(0),
selectedY(0),
width(width),
height(height),
flipped(false),
flipLeft(true)
{
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setCacheMode(CacheBackground);
setViewportUpdateMode(FullViewportUpdate);
setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform
| QPainter::TextAntialiasing);
setBackgroundBrush(QPixmap(":/images/blue_angle_swirl.jpg"));
#ifndef QT_NO_OPENGL
setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers)));
#endif
setMinimumSize(50, 50);
selectionTimeLine = new QTimeLine(150, this);
flipTimeLine = new QTimeLine(500, this);
QRectF bounds((-width / 2.0) * 150, (-height / 2.0) * 150, width * 150, height * 150);
scene = new QGraphicsScene(bounds, this);
scene->setItemIndexMethod(QGraphicsScene::NoIndex);
setScene(scene);
baseItem = new RoundRectItem(bounds, QColor(226, 255, 92, 64));
scene->addItem(baseItem);
QWidget *embed = new QWidget;
ui = new Ui_BackSide;
ui->setupUi(embed);
ui->hostName->setFocus();
backItem = new RoundRectItem(bounds, embed->palette().window(), embed);
backItem->setTransform(QTransform().rotate(180, Qt::YAxis));
backItem->setParentItem(baseItem);
selectionItem = new RoundRectItem(QRectF(-60, -60, 120, 120), Qt::gray);
selectionItem->setParentItem(baseItem);
selectionItem->setZValue(-1);
selectionItem->setPos(posForLocation(0, 0));
startPos = selectionItem->pos();
grid = new QGraphicsItem **[height];
for (int y = 0; y < height; ++y) {
grid[y] = new QGraphicsItem *[width];
for (int x = 0; x < width; ++x) {
RoundRectItem *item = new RoundRectItem(QRectF(-54, -54, 108, 108),
QColor(214, 240, 110, 128));
item->setPos(posForLocation(x, y));
item->setParentItem(baseItem);
item->setFlag(QGraphicsItem::ItemIsFocusable);
grid[y][x] = item;
switch (qrand() % 9) {
case 0: item->setPixmap(QPixmap(":/images/kontact_contacts.png")); break;
case 1: item->setPixmap(QPixmap(":/images/kontact_journal.png")); break;
case 2: item->setPixmap(QPixmap(":/images/kontact_notes.png")); break;
case 3: item->setPixmap(QPixmap(":/images/kopeteavailable.png")); break;
case 4: item->setPixmap(QPixmap(":/images/metacontact_online.png")); break;
case 5: item->setPixmap(QPixmap(":/images/minitools.png")); break;
case 6: item->setPixmap(QPixmap(":/images/kontact_journal.png")); break;
case 7: item->setPixmap(QPixmap(":/images/kontact_contacts.png")); break;
case 8: item->setPixmap(QPixmap(":/images/kopeteavailable.png")); break;
default:
break;
}
connect(item, SIGNAL(activated()), this, SLOT(flip()));
}
}
grid[0][0]->setFocus();
connect(backItem, SIGNAL(activated()),
this, SLOT(flip()));
connect(selectionTimeLine, SIGNAL(valueChanged(qreal)),
this, SLOT(updateSelectionStep(qreal)));
connect(flipTimeLine, SIGNAL(valueChanged(qreal)),
this, SLOT(updateFlipStep(qreal)));
splash = new SplashItem;
splash->setZValue(5);
splash->setPos(-splash->rect().width() / 2, scene->sceneRect().top());
scene->addItem(splash);
splash->grabKeyboard();
updateSelectionStep(0);
setWindowTitle(tr("Pad Navigator Example"));
}
Panel::~Panel()
{
for (int y = 0; y < height; ++y)
delete [] grid[y];
delete [] grid;
}
void Panel::keyPressEvent(QKeyEvent *event)
{
if (splash->isVisible() || event->key() == Qt::Key_Return || flipped) {
QGraphicsView::keyPressEvent(event);
return;
}
selectedX = (selectedX + width + (event->key() == Qt::Key_Right) - (event->key() == Qt::Key_Left)) % width;
selectedY = (selectedY + height + (event->key() == Qt::Key_Down) - (event->key() == Qt::Key_Up)) % height;
grid[selectedY][selectedX]->setFocus();
selectionTimeLine->stop();
startPos = selectionItem->pos();
endPos = posForLocation(selectedX, selectedY);
selectionTimeLine->start();
}
void Panel::resizeEvent(QResizeEvent *event)
{
QGraphicsView::resizeEvent(event);
fitInView(scene->sceneRect(), Qt::KeepAspectRatio);
}
void Panel::updateSelectionStep(qreal val)
{
QPointF newPos(startPos.x() + (endPos - startPos).x() * val,
startPos.y() + (endPos - startPos).y() * val);
selectionItem->setPos(newPos);
QTransform transform;
yrot = newPos.x() / 6.0;
xrot = newPos.y() / 6.0;
transform.rotate(newPos.x() / 6.0, Qt::YAxis);
transform.rotate(newPos.y() / 6.0, Qt::XAxis);
baseItem->setTransform(transform);
}
void Panel::updateFlipStep(qreal val)
{
qreal finalxrot = xrot - xrot * val;
qreal finalyrot;
if (flipLeft)
finalyrot = yrot - yrot * val - 180 * val;
else
finalyrot = yrot - yrot * val + 180 * val;
QTransform transform;
transform.rotate(finalyrot, Qt::YAxis);
transform.rotate(finalxrot, Qt::XAxis);
qreal scale = 1 - sin(3.14 * val) * 0.3;
transform.scale(scale, scale);
baseItem->setTransform(transform);
if (val == 0)
grid[selectedY][selectedX]->setFocus();
}
void Panel::flip()
{
if (flipTimeLine->state() == QTimeLine::Running)
return;
if (flipTimeLine->currentValue() == 0) {
flipTimeLine->setDirection(QTimeLine::Forward);
flipTimeLine->start();
flipped = true;
flipLeft = selectionItem->pos().x() < 0;
} else {
flipTimeLine->setDirection(QTimeLine::Backward);
flipTimeLine->start();
flipped = false;
}
}
QPointF Panel::posForLocation(int x, int y) const
{
return QPointF(x * 150, y * 150)
- QPointF((width - 1) * 75, (height - 1) * 75);
}</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
>
915
