Qt 4.5: layoutitem.cpp Example File (graphicsview/basicgraphicslayouts/layoutitem.cpp)

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# layoutitem.cpp Example File
graphicsview/basicgraphicslayouts/layoutitem.cpp

     /****************************************************************************
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     ** Contact: Qt Software Information (qt-info@nokia.com)
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     ** General Public License version 3.0 as published by the Free Software
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     #include "layoutitem.h"

     LayoutItem::LayoutItem(QGraphicsItem *parent/* = 0*/)
         : QGraphicsWidget(parent)
     {
         pix = new QPixmap(QLatin1String(":/images/block.png"));
         // Do not allow a size smaller than the pixmap with two frames around it.
         setMinimumSize(pix->size() + QSize(12, 12));
     }

     LayoutItem::~LayoutItem()
     {
         delete pix;
     }

     void LayoutItem::paint(QPainter *painter,
         const QStyleOptionGraphicsItem *option, QWidget *widget /*= 0*/)
     {
         Q_UNUSED(widget);
         Q_UNUSED(option);

         QRectF frame(QPointF(0,0), geometry().size());
         qreal w = pix->width();
         qreal h = pix->height();
         QGradientStops stops;

         // paint a background rect (with gradient)
         QLinearGradient gradient(frame.topLeft(), frame.topLeft() + QPointF(200,200));
         stops << QGradientStop(0.0, QColor(60, 60,  60));
         stops << QGradientStop(frame.height()/2/frame.height(), QColor(102, 176, 54));

         //stops << QGradientStop(((frame.height() + h)/2 )/frame.height(), QColor(157, 195,  55));
         stops << QGradientStop(1.0, QColor(215, 215, 215));
         gradient.setStops(stops);
         painter->setBrush(QBrush(gradient));
         painter->drawRoundedRect(frame, 10.0, 10.0);

         // paint a rect around the pixmap (with gradient)
         QPointF pixpos = frame.center() - (QPointF(w, h)/2);
         QRectF innerFrame(pixpos, QSizeF(w, h));
         innerFrame.adjust(-4, -4, +4, +4);
         gradient.setStart(innerFrame.topLeft());
         gradient.setFinalStop(innerFrame.bottomRight());
         stops.clear();
         stops << QGradientStop(0.0, QColor(215, 255, 200));
         stops << QGradientStop(0.5, QColor(102, 176, 54));
         stops << QGradientStop(1.0, QColor(0, 0,  0));
         gradient.setStops(stops);
         painter->setBrush(QBrush(gradient));
         painter->drawRoundedRect(innerFrame, 10.0, 10.0);
         painter->drawPixmap(pixpos, *pix);
     }