Demonstrates anchor layout in a graphics view scene.
The Anchor Layout example demonstrates the use of the QGraphicsAnchorLayout 类。
The basic steps of this example are:
QGraphicsScene scene; scene.setSceneRect(0, 0, 800, 480);
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(nullptr, 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();
另请参阅 简单锚点布局范例 .