qt 6.5.1 original

tests/benchmarks/widgets/graphicsview/qgraphicslinearlayout/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## tst_bench_qgraphicslinearlayout Binary:
+#####################################################################
+
+qt_internal_add_benchmark(tst_bench_qgraphicslinearlayout
+    SOURCES
+        tst_qgraphicslinearlayout.cpp
+    LIBRARIES
+        Qt::Gui
+        Qt::Test
+        Qt::Widgets
+)

tests/benchmarks/widgets/graphicsview/qgraphicslinearlayout/tst_qgraphicslinearlayout.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 <QTest>
+#include <QGraphicsLinearLayout>
+#include <QGraphicsWidget>
+#include <QGraphicsView>
+
+class tst_QGraphicsLinearLayout : public QObject
+{
+    Q_OBJECT
+public:
+    tst_QGraphicsLinearLayout() {}
+    ~tst_QGraphicsLinearLayout() {}
+
+private slots:
+    void heightForWidth_data();
+    void heightForWidth();
+};
+
+
+struct MySquareWidget : public QGraphicsWidget
+{
+    MySquareWidget() {}
+    QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const override
+    {
+        if (which != Qt::PreferredSize)
+            return QGraphicsWidget::sizeHint(which, constraint);
+        if (constraint.width() < 0)
+            return QGraphicsWidget::sizeHint(which, constraint);
+        return QSizeF(constraint.width(), constraint.width());
+    }
+};
+
+void tst_QGraphicsLinearLayout::heightForWidth_data()
+{
+    QTest::addColumn<bool>("hfw");
+    QTest::addColumn<bool>("nested");
+
+    QTest::newRow("hfw") << true << false;
+    QTest::newRow("hfw, nested") << true << true;
+    QTest::newRow("not hfw") << false << false;
+    QTest::newRow("not hfw, nested") << false << true;
+}
+
+void tst_QGraphicsLinearLayout::heightForWidth()
+{
+    QFETCH(bool, hfw);
+    QFETCH(bool, nested);
+
+    QGraphicsScene scene;
+    QGraphicsWidget *form = new QGraphicsWidget;
+    scene.addItem(form);
+
+    QGraphicsLinearLayout *outerlayout = 0;
+    if (nested) {
+       outerlayout = new QGraphicsLinearLayout(form);
+       for (int i = 0; i < 8; i++) {
+           QGraphicsLinearLayout *layout = new QGraphicsLinearLayout(Qt::Vertical);
+           outerlayout->addItem(layout);
+           outerlayout = layout;
+       }
+    }
+
+    QGraphicsLinearLayout *qlayout = 0;
+    qlayout = new QGraphicsLinearLayout(Qt::Vertical);
+    if (nested)
+        outerlayout->addItem(qlayout);
+    else
+        form->setLayout(qlayout);
+
+    MySquareWidget *widget = new MySquareWidget;
+    for (int i = 0; i < 1; i++) {
+        widget = new MySquareWidget;
+        QSizePolicy sizepolicy = widget->sizePolicy();
+        sizepolicy.setHeightForWidth(hfw);
+        widget->setSizePolicy(sizepolicy);
+        qlayout->addItem(widget);
+    }
+    // make sure only one iteration is done.
+    // run with tst_QGraphicsLinearLayout.exe "heightForWidth" -tickcounter -iterations 6
+    // this will iterate 6 times the whole test, (not only the benchmark)
+    // which should reduce warmup time and give a realistic picture of the performance of
+    // effectiveSizeHint()
+    QSizeF constraint(hfw ? 100 : -1, -1);
+    QBENCHMARK {
+        (void)form->effectiveSizeHint(Qt::PreferredSize, constraint);
+    }
+
+}
+
+
+QTEST_MAIN(tst_QGraphicsLinearLayout)
+
+#include "tst_qgraphicslinearlayout.moc"