| /**************************************************************************** |
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| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the examples of the Qt Toolkit. |
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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(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(); |
| |
| return app.exec(); |
| } |