C++/Qt/QGraphicsView
QGraphicsView, QGraphicsItem and QGraphicsScene
<source lang="cpp"> Foundations of Qt Development\Chapter07\graphicsview\opengl\main.cpp /*
* Copyright (c) 2006-2007, Johan Thelin * * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of APress nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */
- include <QApplication>
- include <QGraphicsScene>
- include <QGraphicsView>
- include <QGraphicsRectItem>
- include <QGLWidget>
QGraphicsItem *createItem( int x, QGraphicsScene *scene ) {
QGraphicsRectItem *rectItem = new QGraphicsRectItem( QRect( x+40, 40, 120, 120 ), 0, scene ); rectItem->setPen( QPen(Qt::black) ); rectItem->setBrush( Qt::gray ); QGraphicsRectItem *innerRectItem = new QGraphicsRectItem( QRect( x+50, 50, 45, 100 ), rectItem, scene ); innerRectItem->setPen( QPen(Qt::black) ); innerRectItem->setBrush( Qt::white ); QGraphicsEllipseItem *ellipseItem = new QGraphicsEllipseItem( QRect( x+105, 50, 45, 100 ), rectItem, scene ); ellipseItem->setPen( QPen(Qt::black) ); ellipseItem->setBrush( Qt::white ); return rectItem;
} int main( int argc, char **argv ) {
QApplication app( argc, argv ); QGraphicsScene scene( QRect( 0, 00, 1000, 200 ) ); QGraphicsItem *item1 = createItem( 0, &scene ); QGraphicsItem *item2 = createItem( 200, &scene ); item2->translate( 300, 100 ); item2->rotate( 30 ); item2->translate( -300, -100 ); QGraphicsItem *item3 = createItem( 400, &scene ); item3->translate( 500, 100 ); item3->scale( 0.5, 0.7 ); item3->translate( -500, -100 ); QGraphicsItem *item4 = createItem( 600, &scene ); item4->translate( 700, 100 ); item4->shear( 0.1, 0.3 ); item4->translate( -700, -100 ); QGraphicsItem *item5 = createItem( 800, &scene ); item5->translate( 900, 100 ); item5->scale( 0.5, 0.7 ); item5->rotate( 30 ); item5->shear( 0.1, 0.3 ); item5->translate( -900, -100 ); QGraphicsView view; view.setScene( &scene ); view.setViewport( new QGLWidget() ); view.show(); return app.exec();
}
</source>