mirror of
https://github.com/crystalidea/qt6windows7.git
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101 lines
3.1 KiB
C++
101 lines
3.1 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include <QtWidgets>
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class Widget : public QGraphicsWidget
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{
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public:
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Widget(const QColor &color, const QColor &textColor, const QString &caption,
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QGraphicsItem *parent = nullptr)
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: QGraphicsWidget(parent)
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, caption(caption)
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, color(color)
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, textColor(textColor)
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{
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}
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void paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget * = nullptr) override
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{
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QFont font;
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font.setPixelSize(0.75 * qMin(boundingRect().width(), boundingRect().height()));
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painter->fillRect(boundingRect(), color);
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painter->save();
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painter->setFont(font);
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painter->setPen(textColor);
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painter->drawText(boundingRect(), Qt::AlignCenter, caption);
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painter->restore();
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}
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private:
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QString caption;
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QColor color;
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QColor textColor;
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};
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int main(int argc, char *argv[])
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{
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QApplication app(argc, argv);
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QGraphicsScene scene;
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Widget *a = new Widget(Qt::blue, Qt::white, "a");
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a->setPreferredSize(100, 100);
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Widget *b = new Widget(Qt::green, Qt::black, "b");
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b->setPreferredSize(100, 100);
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Widget *c = new Widget(Qt::red, Qt::black, "c");
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c->setPreferredSize(100, 100);
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QGraphicsAnchorLayout *layout = new QGraphicsAnchorLayout;
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/*
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//! [adding a corner anchor in two steps]
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layout->addAnchor(a, Qt::AnchorTop, layout, Qt::AnchorTop);
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layout->addAnchor(a, Qt::AnchorLeft, layout, Qt::AnchorLeft);
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//! [adding a corner anchor in two steps]
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*/
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//! [adding a corner anchor]
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layout->addCornerAnchors(a, Qt::TopLeftCorner, layout, Qt::TopLeftCorner);
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//! [adding a corner anchor]
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//! [adding anchors]
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layout->addAnchor(b, Qt::AnchorLeft, a, Qt::AnchorRight);
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layout->addAnchor(b, Qt::AnchorTop, a, Qt::AnchorBottom);
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//! [adding anchors]
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// Place a third widget below the second.
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layout->addAnchor(b, Qt::AnchorBottom, c, Qt::AnchorTop);
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/*
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//! [adding anchors to match sizes in two steps]
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layout->addAnchor(b, Qt::AnchorLeft, c, Qt::AnchorLeft);
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layout->addAnchor(b, Qt::AnchorRight, c, Qt::AnchorRight);
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//! [adding anchors to match sizes in two steps]
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*/
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//! [adding anchors to match sizes]
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layout->addAnchors(b, c, Qt::Horizontal);
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//! [adding anchors to match sizes]
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// Anchor the bottom-right corner of the third widget to the bottom-right
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// corner of the layout.
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layout->addCornerAnchors(c, Qt::BottomRightCorner, layout, Qt::BottomRightCorner);
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auto w = new QGraphicsWidget(nullptr, Qt::Window | Qt::CustomizeWindowHint | Qt::WindowTitleHint);
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w->setPos(20, 20);
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w->setMinimumSize(100, 100);
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w->setPreferredSize(320, 240);
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w->setLayout(layout);
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w->setWindowTitle(QApplication::translate("simpleanchorlayout", "QGraphicsAnchorLayout in use"));
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scene.addItem(w);
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QGraphicsView view;
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view.setScene(&scene);
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view.setWindowTitle(QApplication::translate("simpleanchorlayout", "Simple Anchor Layout"));
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view.resize(360, 320);
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view.show();
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return app.exec();
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}
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