qt 6.5.1 original

examples/widgets/graphicsview/simpleanchorlayout/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+cmake_minimum_required(VERSION 3.16)
+project(simpleanchorlayout LANGUAGES CXX)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/graphicsview/simpleanchorlayout")
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
+
+qt_standard_project_setup()
+
+qt_add_executable(simpleanchorlayout
+    main.cpp
+)
+
+set_target_properties(simpleanchorlayout PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(simpleanchorlayout PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+)
+
+install(TARGETS simpleanchorlayout
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

examples/widgets/graphicsview/simpleanchorlayout/main.cpp

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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();
+}

examples/widgets/graphicsview/simpleanchorlayout/simpleanchorlayout.pro

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+TARGET = simpleanchorlayout
+
+QT += widgets
+
+SOURCES   = main.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/widgets/graphicsview/simpleanchorlayout
+INSTALLS += target