/**************************************************************************** ** ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** 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 Nokia Corporation 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." ** $QT_END_LICENSE$ ** ****************************************************************************/ //! [0] QLinearGradient gradient(0, 0, 100, 100); gradient.setColorAt(0, Qt::red); gradient.setColorAt(0.5, Qt::green); gradient.setColorAt(1, Qt::blue); painter.setBrush(gradient); painter.drawRect(0, 0, 100, 100); //! [0] //! [1] QRadialGradient gradient(50, 50, 50, 30, 30); gradient.setColorAt(0.2, Qt::white); gradient.setColorAt(0.8, Qt::green); gradient.setColorAt(1, Qt::black); painter.setBrush(gradient); painter.drawEllipse(0, 0, 100, 100); //! [1] //! [2] QConicalGradient gradient(60, 40, 0); gradient.setColorAt(0, Qt::black); gradient.setColorAt(0.4, Qt::green); gradient.setColorAt(0.6, Qt::white); gradient.setColorAt(1, Qt::black); painter.setBrush(gradient); painter.drawEllipse(0, 0, 100, 100); //! [2] //! [3] // Specfiy semi-transparent red painter.setBrush(QColor(255, 0, 0, 127)); painter.drawRect(0, 0, width()/2, height()); // Specify semi-transparend blue painter.setBrush(QColor(0, 0, 255, 127)); painter.drawRect(0, 0, width(), height()/2); //! [3] //! [4] // One line without anti-aliasing painter.drawLine(0, 0, width()/2, height()); // One line with anti-aliasing painter.setRenderHint(QPainter::Antialiasing); painter.drawLine(width()/2, 0, width()/2, height()); //! [4] //! [5] QPainterPath path; path.addRect(20, 20, 60, 60); path.addBezier(0, 0, 99, 0, 50, 50, 99, 99); path.addBezier(99, 99, 0, 99, 50, 50, 0, 0); painter.drawPath(path); //! [5] //! [6] QPixmap buffer(size()); QPainter painter(&buffer); // Paint code here painter.end(); bitBlt(this, 0, 0, &buffer); //! [6] //! [7] QPainter painter(this); // Paint code here painter.end(); //! [7] //! [8] unbufferedWidget->setAttribute(Qt::WA_PaintOnScreen); //! [8] //! [9] QLinearGradient gradient(0, 0, 100, 100); gradient.setColorAt(0, Qt::blue); gradient.setColorAt(1, Qt::red); painter.setPen(QPen(gradient, 0)); for (int y=fontSize; y<100; y+=fontSize) drawText(0, y, text); //! [9] //! [10] QImage image(100, 100, 32); QPainter painter(&image); // painter commands. painter.end(); //! [10]