qt 6.5.1 original

tests/manual/qgraphicsitem/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## qgraphicsitem Binary:
+#####################################################################
+
+qt_internal_add_manual_test(qgraphicsitem
+    GUI
+    SOURCES
+        main.cpp
+    LIBRARIES
+        Qt::Gui
+        Qt::Widgets
+)

tests/manual/qgraphicsitem/main.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include <QApplication>
+#include <QGraphicsView>
+#include <QGraphicsScene>
+#include <QGraphicsItem>
+#include <QMessageBox>
+
+class MyObject : public QObject
+{
+public:
+    MyObject(QGraphicsItem *i, QObject *parent = nullptr) : QObject(parent), itemToToggle(i)
+    {
+        startTimer(500);
+    }
+protected:
+    void timerEvent(QTimerEvent *)
+    {
+        itemToToggle->setVisible(!itemToToggle->isVisible());
+    }
+private:
+    QGraphicsItem *itemToToggle;
+};
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    QGraphicsView gv;
+    QGraphicsScene *scene = new QGraphicsScene(&gv);
+    gv.setScene(scene);
+    QGraphicsItem *rect = scene->addRect(0, 0, 200, 200, QPen(Qt::NoPen), QBrush(Qt::yellow));
+    rect->setFlag(QGraphicsItem::ItemHasNoContents);
+    rect->setFlag(QGraphicsItem::ItemClipsChildrenToShape);
+
+    QGraphicsItem *childRect = scene->addRect(0, 0, 100, 100, QPen(Qt::NoPen), QBrush(Qt::red));
+    childRect->setParentItem(rect);
+    gv.show();
+    MyObject o(rect);
+    QMessageBox::information(0, "What you should see",
+                             "The red rectangle should toggle visibility, so you should see it flash on and off");
+    return a.exec();
+}

tests/manual/qgraphicsitem/qgraphicsitem.pro

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+QT += widgets
+SOURCES += main.cpp