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Diffstat (limited to 'examples/widgets/painting/basicdrawing/renderarea.cpp')
| -rw-r--r-- | examples/widgets/painting/basicdrawing/renderarea.cpp | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/examples/widgets/painting/basicdrawing/renderarea.cpp b/examples/widgets/painting/basicdrawing/renderarea.cpp new file mode 100644 index 0000000000..9fb4ab589d --- /dev/null +++ b/examples/widgets/painting/basicdrawing/renderarea.cpp @@ -0,0 +1,207 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the examples 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." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtWidgets> + +#include "renderarea.h" + +//! [0] +RenderArea::RenderArea(QWidget *parent) + : QWidget(parent) +{ + shape = Polygon; + antialiased = false; + transformed = false; + pixmap.load(":/images/qt-logo.png"); + + setBackgroundRole(QPalette::Base); + setAutoFillBackground(true); +} +//! [0] + +//! [1] +QSize RenderArea::minimumSizeHint() const +{ + return QSize(100, 100); +} +//! [1] + +//! [2] +QSize RenderArea::sizeHint() const +{ + return QSize(400, 200); +} +//! [2] + +//! [3] +void RenderArea::setShape(Shape shape) +{ + this->shape = shape; + update(); +} +//! [3] + +//! [4] +void RenderArea::setPen(const QPen &pen) +{ + this->pen = pen; + update(); +} +//! [4] + +//! [5] +void RenderArea::setBrush(const QBrush &brush) +{ + this->brush = brush; + update(); +} +//! [5] + +//! [6] +void RenderArea::setAntialiased(bool antialiased) +{ + this->antialiased = antialiased; + update(); +} +//! [6] + +//! [7] +void RenderArea::setTransformed(bool transformed) +{ + this->transformed = transformed; + update(); +} +//! [7] + +//! [8] +void RenderArea::paintEvent(QPaintEvent * /* event */) +{ + static const QPoint points[4] = { + QPoint(10, 80), + QPoint(20, 10), + QPoint(80, 30), + QPoint(90, 70) + }; + + QRect rect(10, 20, 80, 60); + + QPainterPath path; + path.moveTo(20, 80); + path.lineTo(20, 30); + path.cubicTo(80, 0, 50, 50, 80, 80); + + int startAngle = 20 * 16; + int arcLength = 120 * 16; +//! [8] + +//! [9] + QPainter painter(this); + painter.setPen(pen); + painter.setBrush(brush); + if (antialiased) + painter.setRenderHint(QPainter::Antialiasing, true); +//! [9] + +//! [10] + for (int x = 0; x < width(); x += 100) { + for (int y = 0; y < height(); y += 100) { + painter.save(); + painter.translate(x, y); +//! [10] //! [11] + if (transformed) { + painter.translate(50, 50); + painter.rotate(60.0); + painter.scale(0.6, 0.9); + painter.translate(-50, -50); + } +//! [11] + +//! [12] + switch (shape) { + case Line: + painter.drawLine(rect.bottomLeft(), rect.topRight()); + break; + case Points: + painter.drawPoints(points, 4); + break; + case Polyline: + painter.drawPolyline(points, 4); + break; + case Polygon: + painter.drawPolygon(points, 4); + break; + case Rect: + painter.drawRect(rect); + break; + case RoundedRect: + painter.drawRoundedRect(rect, 25, 25, Qt::RelativeSize); + break; + case Ellipse: + painter.drawEllipse(rect); + break; + case Arc: + painter.drawArc(rect, startAngle, arcLength); + break; + case Chord: + painter.drawChord(rect, startAngle, arcLength); + break; + case Pie: + painter.drawPie(rect, startAngle, arcLength); + break; + case Path: + painter.drawPath(path); + break; + case Text: + painter.drawText(rect, Qt::AlignCenter, tr("Qt by\nNokia")); + break; + case Pixmap: + painter.drawPixmap(10, 10, pixmap); + } +//! [12] //! [13] + painter.restore(); + } + } + + painter.setRenderHint(QPainter::Antialiasing, false); + painter.setPen(palette().dark().color()); + painter.setBrush(Qt::NoBrush); + painter.drawRect(QRect(0, 0, width() - 1, height() - 1)); +} +//! [13] |