main.cpp Example File

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 ** This file is part of the examples of the Qt Toolkit.
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 #include <QtGui>

 class Widget : public QGraphicsWidget
 {
 public:
     Widget(const QColor &color, const QColor &textColor, const QString &caption,
            QGraphicsItem *parent = 0)
         : QGraphicsWidget(parent), caption(caption), color(color), textColor(textColor)
     {
     }

     void paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget * = 0)
     {
         QFont font;
         font.setPixelSize(0.75 * qMin(boundingRect().width(), boundingRect().height()));

         painter->fillRect(boundingRect(), color);
         painter->save();
         painter->setFont(font);
         painter->setPen(textColor);
         painter->drawText(boundingRect(), Qt::AlignCenter, caption);
         painter->restore();
     }

 private:
     QString caption;
     QColor color;
     QColor textColor;
 };

 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);

     QGraphicsScene *scene = new QGraphicsScene();

     Widget *a = new Widget(Qt::blue, Qt::white, "a");
     a->setPreferredSize(100, 100);
     Widget *b = new Widget(Qt::green, Qt::black, "b");
     b->setPreferredSize(100, 100);
     Widget *c = new Widget(Qt::red, Qt::black, "c");
     c->setPreferredSize(100, 100);

     QGraphicsAnchorLayout *layout = new QGraphicsAnchorLayout();
 /*
     layout->addAnchor(a, Qt::AnchorTop, layout, Qt::AnchorTop);
     layout->addAnchor(a, Qt::AnchorLeft, layout, Qt::AnchorLeft);
 */
     layout->addCornerAnchors(a, Qt::TopLeftCorner, layout, Qt::TopLeftCorner);

     layout->addAnchor(b, Qt::AnchorLeft, a, Qt::AnchorRight);
     layout->addAnchor(b, Qt::AnchorTop, a, Qt::AnchorBottom);

     // Place a third widget below the second.
     layout->addAnchor(b, Qt::AnchorBottom, c, Qt::AnchorTop);

 /*
     layout->addAnchor(b, Qt::AnchorLeft, c, Qt::AnchorLeft);
     layout->addAnchor(b, Qt::AnchorRight, c, Qt::AnchorRight);
 */

     layout->addAnchors(b, c, Qt::Horizontal);

     // Anchor the bottom-right corner of the third widget to the bottom-right
     // corner of the layout.
     layout->addCornerAnchors(c, Qt::BottomRightCorner, layout, Qt::BottomRightCorner);

     QGraphicsWidget *w = new QGraphicsWidget(0, Qt::Window | Qt::CustomizeWindowHint | Qt::WindowTitleHint);
     w->setPos(20, 20);
     w->setMinimumSize(100, 100);
     w->setPreferredSize(320, 240);
     w->setLayout(layout);
     w->setWindowTitle(QApplication::translate("simpleanchorlayout", "QGraphicsAnchorLayout in use"));
     scene->addItem(w);

     QGraphicsView *view = new QGraphicsView();
     view->setScene(scene);
     view->setWindowTitle(QApplication::translate("simpleanchorlayout", "Simple Anchor Layout"));

 #if defined(Q_OS_SYMBIAN)
     view->showMaximized();
 #elif defined(Q_WS_MAEMO_5)
     view-show();
 #else
     view->resize(360, 320);
     view->show();
 #endif

     return app.exec();
 }