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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#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();
}
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