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| ** This file is part of the examples of the Qt Toolkit. |
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| |
| #include <QtWidgets> |
| |
| class Widget : public QGraphicsWidget |
| { |
| public: |
| Widget(const QColor &color, const QColor &textColor, const QString &caption, |
| QGraphicsItem *parent = nullptr) |
| : QGraphicsWidget(parent) |
| , caption(caption) |
| , color(color) |
| , textColor(textColor) |
| { |
| } |
| |
| void paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget * = nullptr) override |
| { |
| 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; |
| |
| 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; |
| /* |
| //! [adding a corner anchor in two steps] |
| layout->addAnchor(a, Qt::AnchorTop, layout, Qt::AnchorTop); |
| layout->addAnchor(a, Qt::AnchorLeft, layout, Qt::AnchorLeft); |
| //! [adding a corner anchor in two steps] |
| */ |
| //! [adding a corner anchor] |
| layout->addCornerAnchors(a, Qt::TopLeftCorner, layout, Qt::TopLeftCorner); |
| //! [adding a corner anchor] |
| |
| //! [adding anchors] |
| layout->addAnchor(b, Qt::AnchorLeft, a, Qt::AnchorRight); |
| layout->addAnchor(b, Qt::AnchorTop, a, Qt::AnchorBottom); |
| //! [adding anchors] |
| |
| // Place a third widget below the second. |
| layout->addAnchor(b, Qt::AnchorBottom, c, Qt::AnchorTop); |
| |
| /* |
| //! [adding anchors to match sizes in two steps] |
| layout->addAnchor(b, Qt::AnchorLeft, c, Qt::AnchorLeft); |
| layout->addAnchor(b, Qt::AnchorRight, c, Qt::AnchorRight); |
| //! [adding anchors to match sizes in two steps] |
| */ |
| |
| //! [adding anchors to match sizes] |
| layout->addAnchors(b, c, Qt::Horizontal); |
| //! [adding anchors to match sizes] |
| |
| // 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); |
| |
| auto w = new QGraphicsWidget(nullptr, 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; |
| view.setScene(&scene); |
| view.setWindowTitle(QApplication::translate("simpleanchorlayout", "Simple Anchor Layout")); |
| |
| view.resize(360, 320); |
| view.show(); |
| |
| return app.exec(); |
| } |