examples/graphicsview/padnavigator/splashitem.cpp
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     1 /****************************************************************************
       
     2 **
       
     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
       
     4 ** All rights reserved.
       
     5 ** Contact: Nokia Corporation (qt-info@nokia.com)
       
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     7 ** This file is part of the examples of the Qt Toolkit.
       
     8 **
       
     9 ** $QT_BEGIN_LICENSE:LGPL$
       
    10 ** No Commercial Usage
       
    11 ** This file contains pre-release code and may not be distributed.
       
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    13 ** contained in the Technology Preview License Agreement accompanying
       
    14 ** this package.
       
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    16 ** GNU Lesser General Public License Usage
       
    17 ** Alternatively, this file may be used under the terms of the GNU Lesser
       
    18 ** General Public License version 2.1 as published by the Free Software
       
    19 ** Foundation and appearing in the file LICENSE.LGPL included in the
       
    20 ** packaging of this file.  Please review the following information to
       
    21 ** ensure the GNU Lesser General Public License version 2.1 requirements
       
    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
       
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    24 ** In addition, as a special exception, Nokia gives you certain additional
       
    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception
       
    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
       
    27 **
       
    28 ** If you have questions regarding the use of this file, please contact
       
    29 ** Nokia at qt-info@nokia.com.
       
    30 **
       
    31 **
       
    32 **
       
    33 **
       
    34 **
       
    35 **
       
    36 **
       
    37 **
       
    38 ** $QT_END_LICENSE$
       
    39 **
       
    40 ****************************************************************************/
       
    41 
       
    42 #include "splashitem.h"
       
    43 
       
    44 #include <QtGui/QtGui>
       
    45 
       
    46 SplashItem::SplashItem(QGraphicsItem *parent)
       
    47     : QGraphicsWidget(parent)
       
    48 {
       
    49     opacity = 1.0;
       
    50 
       
    51     
       
    52     timeLine = new QTimeLine(350);
       
    53     timeLine->setCurveShape(QTimeLine::EaseInCurve);
       
    54     connect(timeLine, SIGNAL(valueChanged(qreal)), this, SLOT(setValue(qreal)));
       
    55 
       
    56     text = tr("Welcome to the Pad Navigator Example. You can use the"
       
    57               " keyboard arrows to navigate the icons, and press enter"
       
    58               " to activate an item. Please press any key to continue.");
       
    59     resize(400, 175);
       
    60 }
       
    61 
       
    62 void SplashItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
       
    63 {
       
    64     painter->setOpacity(opacity);
       
    65     painter->setPen(QPen(Qt::black, 2));
       
    66     painter->setBrush(QColor(245, 245, 255, 220));
       
    67     painter->setClipRect(rect());
       
    68     painter->drawRoundRect(3, -100 + 3, 400 - 6, 250 - 6);
       
    69 
       
    70     QRectF textRect = rect().adjusted(10, 10, -10, -10);
       
    71     int flags = Qt::AlignTop | Qt::AlignLeft | Qt::TextWordWrap;
       
    72 
       
    73     QFont font;
       
    74     font.setPixelSize(18);
       
    75     painter->setPen(Qt::black);
       
    76     painter->setFont(font);
       
    77     painter->drawText(textRect, flags, text);
       
    78 }
       
    79 
       
    80 void SplashItem::keyPressEvent(QKeyEvent * /* event */)
       
    81 {
       
    82     if (timeLine->state() == QTimeLine::NotRunning)
       
    83         timeLine->start();
       
    84 }
       
    85 
       
    86 void SplashItem::setValue(qreal value)
       
    87 {
       
    88     opacity = 1 - value;
       
    89     setPos(x(), scene()->sceneRect().top() - rect().height() * value);
       
    90     if (value == 1)
       
    91         hide();
       
    92 }