mirror of
https://github.com/crystalidea/qt6windows7.git
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110 lines
2.7 KiB
C++
110 lines
2.7 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
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#include <QtGui>
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#include "valgrind/callgrind.h"
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class ItemMover : public QObject
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{
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Q_OBJECT
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public:
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ItemMover(QGraphicsItem *item)
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: _item(item)
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{
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startTimer(0);
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}
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protected:
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void timerEvent(QTimerEvent *event)
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{
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_item->moveBy(-1, 0);
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}
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private:
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QGraphicsItem *_item;
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};
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class ClipItem : public QGraphicsRectItem
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{
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public:
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ClipItem(qreal x, qreal y, qreal w, qreal h, const QPen &pen, const QBrush &brush)
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: QGraphicsRectItem(x, y, w, h)
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{
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setPen(pen);
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setBrush(brush);
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}
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QPainterPath shape() const
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{
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QPainterPath path;
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path.addRect(rect());
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return path;
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}
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};
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class CountView : public QGraphicsView
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{
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protected:
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void paintEvent(QPaintEvent *event)
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{
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static int n = 0;
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if (n)
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CALLGRIND_START_INSTRUMENTATION
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QGraphicsView::paintEvent(event);
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if (n)
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CALLGRIND_STOP_INSTRUMENTATION
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if (++n == 500)
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qApp->quit();
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}
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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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scene.setItemIndexMethod(QGraphicsScene::NoIndex);
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ClipItem *clipItem = new ClipItem(0, 0, 100, 100, QPen(), QBrush(Qt::blue));
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clipItem->setFlag(QGraphicsItem::ItemClipsChildrenToShape);
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clipItem->setData(0, "clipItem");
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scene.addItem(clipItem);
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QGraphicsRectItem *scrollItem = scene.addRect(0, 0, 10, 10, QPen(Qt::NoPen), QBrush(Qt::NoBrush));
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scrollItem->setParentItem(clipItem);
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scrollItem->setFlag(QGraphicsItem::ItemIsMovable);
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scrollItem->setData(0, "scrollItem");
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for (int y = 0; y < 25; ++y) {
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for (int x = 0; x < 25; ++x) {
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ClipItem *rect = new ClipItem(0, 0, 90, 20, QPen(Qt::NoPen), QBrush(Qt::green));
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rect->setParentItem(scrollItem);
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rect->setPos(x * 95, y * 25);
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rect->setData(0, qPrintable(QString("rect %1 %2").arg(x).arg(y)));
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rect->setFlag(QGraphicsItem::ItemClipsChildrenToShape);
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QGraphicsEllipseItem *ellipse = new QGraphicsEllipseItem(-5, -5, 10, 10);
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ellipse->setPen(QPen(Qt::NoPen));
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ellipse->setBrush(QBrush(Qt::yellow));
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ellipse->setParentItem(rect);
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ellipse->setData(0, qPrintable(QString("ellipse %1 %2").arg(x).arg(y)));
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}
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}
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scrollItem->setRect(scrollItem->childrenBoundingRect());
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#if 0
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ItemMover mover(scrollItem);
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#endif
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CountView view;
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view.setScene(&scene);
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view.setSceneRect(-25, -25, 150, 150);
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view.resize(300, 300);
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view.show();
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return app.exec();
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}
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#include "main.moc"
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