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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 <QGraphicsLayout>
#include <QGraphicsLinearLayout>
#include <QGraphicsWidget>
#include <QGraphicsView>
class tst_QGraphicsLayout : public QObject
{
Q_OBJECT
public:
tst_QGraphicsLayout() {}
~tst_QGraphicsLayout() {}
private slots:
void invalidate();
};
class RectWidget : public QGraphicsWidget
{
public:
RectWidget(QGraphicsItem *parent = nullptr, Qt::WindowFlags wFlags = { }) : QGraphicsWidget(parent, wFlags), setGeometryCalls(0) {}
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override
{
Q_UNUSED(option);
Q_UNUSED(widget);
painter->drawRoundedRect(rect(), 25, 25, Qt::RelativeSize);
painter->drawLine(rect().topLeft(), rect().bottomRight());
painter->drawLine(rect().bottomLeft(), rect().topRight());
}
void setGeometry(const QRectF &rect) override
{
//qDebug() << "setGeometry():" << this->data(0).toString();
setGeometryCalls->insert(this, rect);
QGraphicsWidget::setGeometry(rect);
}
void callUpdateGeometry() {
QGraphicsWidget::updateGeometry();
}
QMap<RectWidget*, QRectF> *setGeometryCalls;
};
/**
* Test to see how much time is needed to resize all widgets in a
* layout-widget-layout-widget-.... hierarchy from the point where a
* leaf widget changes its size hint. (updateGeometry() is called).
*
* If you run the test for 4.7 you'll get some really high numbers, but
* that's because they also include painting (and possible processing of
* some other events).
*/
void tst_QGraphicsLayout::invalidate()
{
QGraphicsLayout::setInstantInvalidatePropagation(true);
QGraphicsScene *scene = new QGraphicsScene;
QGraphicsView *view = new QGraphicsView(scene);
QMap<RectWidget*, QRectF> *setGeometryCalls = new QMap<RectWidget*, QRectF>;
RectWidget *window = new RectWidget(0, Qt::Window);
window->setGeometryCalls = setGeometryCalls;
window->setData(0, QString(QChar('a')));
scene->addItem(window);
RectWidget *leaf = 0;
const int depth = 100;
RectWidget *parent = window;
for (int i = 1; i < depth; ++i) {
QGraphicsLinearLayout *l = new QGraphicsLinearLayout(parent);
l->setContentsMargins(0,0,0,0);
RectWidget *child = new RectWidget;
child->setData(0, QString(QChar('a' + i)));
child->setGeometryCalls = setGeometryCalls;
l->addItem(child);
parent = child;
}
leaf = parent;
leaf->setMinimumSize(QSizeF(1,1));
view->show();
QVERIFY(QTest::qWaitForWindowExposed(view));
// ...then measure...
// should be as small as possible, to reduce overhead of painting
QSizeF size(1, 1);
setGeometryCalls->clear();
QBENCHMARK {
leaf->setMinimumSize(size);
leaf->setMaximumSize(size);
while (setGeometryCalls->size() < depth) {
QApplication::sendPostedEvents();
}
// force a resize on each widget, this will ensure
// that each iteration will resize all 50 widgets
int w = int(size.width());
w^=2;
size.setWidth(w);
}
window->setGeometryCalls = nullptr;
delete view;
delete scene;
QGraphicsLayout::setInstantInvalidatePropagation(false);
delete setGeometryCalls;
}
QTEST_MAIN(tst_QGraphicsLayout)
#include "tst_qgraphicslayout.moc"
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