1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the documentation of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:BSD$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** BSD License Usage 18 ** Alternatively, you may use this file under the terms of the BSD license 19 ** as follows: 20 ** 21 ** "Redistribution and use in source and binary forms, with or without 22 ** modification, are permitted provided that the following conditions are 23 ** met: 24 ** * Redistributions of source code must retain the above copyright 25 ** notice, this list of conditions and the following disclaimer. 26 ** * Redistributions in binary form must reproduce the above copyright 27 ** notice, this list of conditions and the following disclaimer in 28 ** the documentation and/or other materials provided with the 29 ** distribution. 30 ** * Neither the name of The Qt Company Ltd nor the names of its 31 ** contributors may be used to endorse or promote products derived 32 ** from this software without specific prior written permission. 33 ** 34 ** 35 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 38 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 39 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 40 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 41 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 42 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 43 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 44 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 45 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." 46 ** 47 ** $QT_END_LICENSE$ 48 ** 49 ****************************************************************************/ 50 51 //! [0] 52 QPainter painter(this); 53 54 painter.setPen(Qt::darkGreen); 55 // Using the (x y w h) overload 56 painter.drawRect(1, 2, 6, 4); 57 //! [0] 58 59 60 //! [1] 61 QPainter painter(this); 62 63 painter.setPen(Qt::darkGreen); 64 painter.drawLine(2, 7, 6, 1); 65 //! [1] 66 67 68 //! [2] 69 QPainter painter(this); 70 painter.setRenderHint( 71 QPainter::Antialiasing); 72 painter.setPen(Qt::darkGreen); 73 // Using the (x y w h) overload 74 painter.drawRect(1, 2, 6, 4); 75 //! [2] 76 77 78 //! [3] 79 QPainter painter(this); 80 painter.setRenderHint( 81 QPainter::Antialiasing); 82 painter.setPen(Qt::darkGreen); 83 painter.drawLine(2, 7, 6, 1); 84 //! [3] 85 86 87 //! [4] 88 QPainter painter(this); 89 painter.setWindow(QRect(-50, -50, 100, 100)); 90 //! [4] 91 92 93 //! [5] 94 int side = qMin(width(), height()) 95 int x = (width() - side / 2); 96 int y = (height() - side / 2); 97 98 painter.setViewport(x, y, side, side); 99 //! [5] 100