123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140 | /******************************************************************************** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).** Contact: http://www.qt-project.org/legal**** This file is part of the documentation of the Qt Toolkit.**** $QT_BEGIN_LICENSE:BSD$** You may use this file under the terms of the BSD license as follows:**** "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 Digia Plc and its Subsidiary(-ies) 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."**** $QT_END_LICENSE$******************************************************************************/#include <QtGui>#include <cmath>class SimpleTransformation :public QWidget {voidpaintEvent(QPaintEvent *);};//! [0]voidSimpleTransformation::paintEvent(QPaintEvent *){ QPainter painter(this); painter.setPen(QPen(Qt::blue,1,Qt::DashLine)); painter.drawRect(0,0,100,100); painter.rotate(45); painter.setFont(QFont("Helvetica",24)); painter.setPen(QPen(Qt::black,1)); painter.drawText(20,10,"QTransform");}//! [0]class CombinedTransformation :public QWidget {voidpaintEvent(QPaintEvent *);};//! [1]voidCombinedTransformation::paintEvent(QPaintEvent *){ QPainter painter(this); painter.setPen(QPen(Qt::blue,1,Qt::DashLine)); painter.drawRect(0,0,100,100); QTransform transform; transform.translate(50,50); transform.rotate(45); transform.scale(0.5,1.0); painter.setTransform(transform); painter.setFont(QFont("Helvetica",24)); painter.setPen(QPen(Qt::black,1)); painter.drawText(20,10,"QTransform");}//! [1]class BasicOperations :public QWidget {voidpaintEvent(QPaintEvent *);};//! [2]voidBasicOperations::paintEvent(QPaintEvent *){double pi =3.14;double a = pi/180*45.0;double sina =sin(a);double cosa =cos(a); QTransform translationTransform(1,0,0,1,50.0,50.0); QTransform rotationTransform(cosa, sina, -sina, cosa,0,0); QTransform scalingTransform(0.5,0,0,1.0,0,0); QTransform transform; transform = scalingTransform * rotationTransform * translationTransform; QPainter painter(this); painter.setPen(QPen(Qt::blue,1,Qt::DashLine)); painter.drawRect(0,0,100,100); painter.setTransform(transform); painter.setFont(QFont("Helvetica",24)); painter.setPen(QPen(Qt::black,1)); painter.drawText(20,10,"QTransform");}//! [2]intmain(int argc,char**argv){ QApplication app(argc, argv); QWidget widget; SimpleTransformation *simpleWidget =new SimpleTransformation; CombinedTransformation *combinedWidget =new CombinedTransformation; BasicOperations *basicWidget =new BasicOperations; QVBoxLayout *layout =new QVBoxLayout; layout->addWidget(simpleWidget); layout->addWidget(combinedWidget); layout->addWidget(basicWidget); widget.setLayout(layout); widget.show(); widget.resize(130,350);return app.exec();}
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