main.cpp 范例文件

graphicsview/anchorlayout/main.cpp
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#include <QtWidgets> static QGraphicsProxyWidget *createItem(const QSizeF &minimum = QSizeF(100.0, 100.0), const QSizeF &preferred = QSize(150.0, 100.0), const QSizeF &maximum = QSizeF(200.0, 100.0), const QString &name = "0") { QGraphicsProxyWidget *w = new QGraphicsProxyWidget; w->setWidget(new QPushButton(name)); w->setData(0, name); w->setMinimumSize(minimum); w->setPreferredSize(preferred); w->setMaximumSize(maximum); w->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred); return w; } int main(int argc, char **argv) { QApplication app(argc, argv); QGraphicsScene scene; scene.setSceneRect(0, 0, 800, 480); QSizeF minSize(30, 100); QSizeF prefSize(210, 100); QSizeF maxSize(300, 100); QGraphicsProxyWidget *a = createItem(minSize, prefSize, maxSize, "A"); QGraphicsProxyWidget *b = createItem(minSize, prefSize, maxSize, "B"); QGraphicsProxyWidget *c = createItem(minSize, prefSize, maxSize, "C"); QGraphicsProxyWidget *d = createItem(minSize, prefSize, maxSize, "D"); QGraphicsProxyWidget *e = createItem(minSize, prefSize, maxSize, "E"); QGraphicsProxyWidget *f = createItem(QSizeF(30, 50), QSizeF(150, 50), maxSize, "F (overflow)"); QGraphicsProxyWidget *g = createItem(QSizeF(30, 50), QSizeF(30, 100), maxSize, "G (overflow)"); QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout; l->setSpacing(0); QGraphicsWidget *w = new QGraphicsWidget(0, Qt::Window); w->setPos(20, 20); w->setLayout(l); // vertical l->addAnchor(a, Qt::AnchorTop, l, Qt::AnchorTop); l->addAnchor(b, Qt::AnchorTop, l, Qt::AnchorTop); l->addAnchor(c, Qt::AnchorTop, a, Qt::AnchorBottom); l->addAnchor(c, Qt::AnchorTop, b, Qt::AnchorBottom); l->addAnchor(c, Qt::AnchorBottom, d, Qt::AnchorTop); l->addAnchor(c, Qt::AnchorBottom, e, Qt::AnchorTop); l->addAnchor(d, Qt::AnchorBottom, l, Qt::AnchorBottom); l->addAnchor(e, Qt::AnchorBottom, l, Qt::AnchorBottom); l->addAnchor(c, Qt::AnchorTop, f, Qt::AnchorTop); l->addAnchor(c, Qt::AnchorVerticalCenter, f, Qt::AnchorBottom); l->addAnchor(f, Qt::AnchorBottom, g, Qt::AnchorTop); l->addAnchor(c, Qt::AnchorBottom, g, Qt::AnchorBottom); // horizontal l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft); l->addAnchor(l, Qt::AnchorLeft, d, Qt::AnchorLeft); l->addAnchor(a, Qt::AnchorRight, b, Qt::AnchorLeft); l->addAnchor(a, Qt::AnchorRight, c, Qt::AnchorLeft); l->addAnchor(c, Qt::AnchorRight, e, Qt::AnchorLeft); l->addAnchor(b, Qt::AnchorRight, l, Qt::AnchorRight); l->addAnchor(e, Qt::AnchorRight, l, Qt::AnchorRight); l->addAnchor(d, Qt::AnchorRight, e, Qt::AnchorLeft); l->addAnchor(l, Qt::AnchorLeft, f, Qt::AnchorLeft); l->addAnchor(l, Qt::AnchorLeft, g, Qt::AnchorLeft); l->addAnchor(f, Qt::AnchorRight, g, Qt::AnchorRight); scene.addItem(w); scene.setBackgroundBrush(Qt::darkGreen); QGraphicsView view(&scene); view.show(); return app.exec(); }