2011-04-27 10:05:43 +00:00
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/****************************************************************************
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**
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2012-09-19 12:28:29 +00:00
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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2011-04-27 10:05:43 +00:00
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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2012-09-19 12:28:29 +00:00
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** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
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** of its contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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2011-04-27 10:05:43 +00:00
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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2012-01-24 06:17:24 +00:00
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**
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2011-04-27 10:05:43 +00:00
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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2011-05-07 20:57:49 +00:00
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#include <QtWidgets>
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2011-04-27 10:05:43 +00:00
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#include "renderarea.h"
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//! [0]
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RenderArea::RenderArea(QWidget *parent)
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: QWidget(parent)
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{
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QFont newFont = font();
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newFont.setPixelSize(12);
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setFont(newFont);
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QFontMetrics fontMetrics(newFont);
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xBoundingRect = fontMetrics.boundingRect(tr("x"));
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yBoundingRect = fontMetrics.boundingRect(tr("y"));
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}
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//! [0]
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//! [1]
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void RenderArea::setOperations(const QList<Operation> &operations)
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{
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this->operations = operations;
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update();
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}
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//! [1]
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//! [2]
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void RenderArea::setShape(const QPainterPath &shape)
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{
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this->shape = shape;
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update();
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}
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//! [2]
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//! [3]
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QSize RenderArea::minimumSizeHint() const
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{
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return QSize(182, 182);
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}
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//! [3]
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//! [4]
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QSize RenderArea::sizeHint() const
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{
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return QSize(232, 232);
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}
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//! [4]
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//! [5]
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void RenderArea::paintEvent(QPaintEvent *event)
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{
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QPainter painter(this);
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painter.setRenderHint(QPainter::Antialiasing);
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painter.fillRect(event->rect(), QBrush(Qt::white));
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painter.translate(66, 66);
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//! [5]
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//! [6]
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painter.save();
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transformPainter(painter);
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drawShape(painter);
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painter.restore();
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//! [6]
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//! [7]
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drawOutline(painter);
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//! [7]
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//! [8]
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transformPainter(painter);
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drawCoordinates(painter);
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}
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//! [8]
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//! [9]
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void RenderArea::drawCoordinates(QPainter &painter)
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{
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painter.setPen(Qt::red);
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painter.drawLine(0, 0, 50, 0);
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painter.drawLine(48, -2, 50, 0);
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painter.drawLine(48, 2, 50, 0);
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painter.drawText(60 - xBoundingRect.width() / 2,
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0 + xBoundingRect.height() / 2, tr("x"));
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painter.drawLine(0, 0, 0, 50);
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painter.drawLine(-2, 48, 0, 50);
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painter.drawLine(2, 48, 0, 50);
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painter.drawText(0 - yBoundingRect.width() / 2,
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60 + yBoundingRect.height() / 2, tr("y"));
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}
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//! [9]
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//! [10]
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void RenderArea::drawOutline(QPainter &painter)
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{
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painter.setPen(Qt::darkGreen);
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painter.setPen(Qt::DashLine);
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painter.setBrush(Qt::NoBrush);
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painter.drawRect(0, 0, 100, 100);
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}
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//! [10]
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//! [11]
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void RenderArea::drawShape(QPainter &painter)
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{
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painter.fillPath(shape, Qt::blue);
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}
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//! [11]
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//! [12]
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void RenderArea::transformPainter(QPainter &painter)
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{
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for (int i = 0; i < operations.size(); ++i) {
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switch (operations[i]) {
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case Translate:
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painter.translate(50, 50);
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break;
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case Scale:
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painter.scale(0.75, 0.75);
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break;
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case Rotate:
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painter.rotate(60);
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break;
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case NoTransformation:
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default:
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;
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}
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}
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}
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//! [12]
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