source: trunk/examples/graphicsview/padnavigator/splashitem.cpp@ 92

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#include "splashitem.h"

#include <QtGui/QtGui>

SplashItem::SplashItem(QGraphicsItem *parent)
    : QGraphicsWidget(parent)
{
    opacity = 1.0;

    
    timeLine = new QTimeLine(350);
    timeLine->setCurveShape(QTimeLine::EaseInCurve);
    connect(timeLine, SIGNAL(valueChanged(qreal)), this, SLOT(setValue(qreal)));

    text = tr("Welcome to the Pad Navigator Example. You can use the"
              " keyboard arrows to navigate the icons, and press enter"
              " to activate an item. Please press any key to continue.");
    resize(400, 175);
}

void SplashItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
{
    painter->setOpacity(opacity);
    painter->setPen(QPen(Qt::black, 2));
    painter->setBrush(QColor(245, 245, 255, 220));
    painter->setClipRect(rect());
    painter->drawRoundRect(3, -100 + 3, 400 - 6, 250 - 6);

    QRectF textRect = rect().adjusted(10, 10, -10, -10);
    int flags = Qt::AlignTop | Qt::AlignLeft | Qt::TextWordWrap;

    QFont font;
    font.setPixelSize(18);
    painter->setPen(Qt::black);
    painter->setFont(font);
    painter->drawText(textRect, flags, text);
}

void SplashItem::keyPressEvent(QKeyEvent * /* event */)
{
    if (timeLine->state() == QTimeLine::NotRunning)
        timeLine->start();
}

void SplashItem::setValue(qreal value)
{
    opacity = 1 - value;
    setPos(x(), scene()->sceneRect().top() - rect().height() * value);
    if (value == 1)
        hide();
}