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Viewing changes to examples/painting/basicdrawing/renderarea.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Adam Conrad
  • Date: 2005-08-24 04:09:09 UTC
  • Revision ID: james.westby@ubuntu.com-20050824040909-xmxe9jfr4a0w5671
Tags: upstream-4.0.0
Import upstream version 4.0.0

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examples/painting/basicdrawing/renderarea.cpp
 
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/****************************************************************************
 
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**
 
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** Copyright (C) 2005-2005 Trolltech AS. All rights reserved.
 
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**
 
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** This file is part of the example classes of the Qt Toolkit.
 
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**
 
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** This file may be distributed under the terms of the Q Public License
 
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** as defined by Trolltech AS of Norway and appearing in the file
 
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** LICENSE.QPL included in the packaging of this file.
 
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**
 
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** This file may be distributed and/or modified under the terms of the
 
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** GNU General Public License version 2 as published by the Free Software
 
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** Foundation and appearing in the file LICENSE.GPL included in the
 
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** packaging of this file.
 
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**
 
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** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
 
17
**   information about Qt Commercial License Agreements.
 
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** See http://www.trolltech.com/qpl/ for QPL licensing information.
 
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** See http://www.trolltech.com/gpl/ for GPL licensing information.
 
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**
 
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** Contact info@trolltech.com if any conditions of this licensing are
 
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** not clear to you.
 
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**
 
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 
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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 
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**
 
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****************************************************************************/
 
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#include <QtGui>
 
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#include "renderarea.h"
 
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RenderArea::RenderArea(QWidget *parent)
 
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    : QWidget(parent)
 
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{
 
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    shape = Polygon;
 
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    antialiased = false;
 
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    pixmap.load(":/images/qt-logo.png");
 
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    setBackgroundRole(QPalette::Base);
 
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}
 
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QSize RenderArea::minimumSizeHint() const
 
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{
 
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    return QSize(100, 100);
 
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}
 
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QSize RenderArea::sizeHint() const
 
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{
 
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    return QSize(400, 200);
 
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}
 
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void RenderArea::setShape(Shape 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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void RenderArea::setPen(const QPen &pen)
 
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{
 
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    this->pen = pen;
 
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    update();
 
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}
 
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void RenderArea::setBrush(const QBrush &brush)
 
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{
 
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    this->brush = brush;
 
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    update();
 
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}
 
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void RenderArea::setAntialiased(bool antialiased)
 
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{
 
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    this->antialiased = antialiased;
 
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    update();
 
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}
 
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void RenderArea::setTransformed(bool transformed)
 
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{
 
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    this->transformed = transformed;
 
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    update();
 
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}
 
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void RenderArea::paintEvent(QPaintEvent *)
 
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{
 
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    static const int polygonPoints[8] = { 10, 80, 20, 10, 80, 30, 90, 70 };
 
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    QPolygon polygon(4, polygonPoints);
 
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    QRect rect(10, 20, 80, 60);
 
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    QPainterPath path;
 
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    path.moveTo(20, 80);
 
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    path.lineTo(20, 30);
 
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    path.cubicTo(80, 0, 50, 50, 80, 80);
 
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    int startAngle = 30 * 16;
 
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    int arcLength = 120 * 16;
 
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    QPainter painter(this);
 
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    painter.setPen(pen);
 
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    painter.setBrush(brush);
 
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    if (antialiased)
 
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        painter.setRenderHint(QPainter::Antialiasing);
 
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    for (int x = 0; x < width(); x += 100) {
 
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        for (int y = 0; y < height(); y += 100) {
 
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            painter.save();
 
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            painter.translate(x, y);
 
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            if (transformed) {
 
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                painter.translate(50, 50);
 
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                painter.rotate(60.0);
 
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                painter.scale(0.6, 0.9);
 
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                painter.translate(-50, -50);
 
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            }
 
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            switch (shape) {
 
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            case Line:
 
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                painter.drawLine(rect.bottomLeft(), rect.topRight());
 
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                break;
 
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            case Points:
 
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                painter.drawPoints(polygon);
 
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                break;
 
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            case Polyline:
 
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                painter.drawPolyline(polygon);
 
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                break;
 
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            case Polygon:
 
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                painter.drawPolygon(polygon);
 
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                break;
 
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            case Rect:
 
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                painter.drawRect(rect);
 
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                break;
 
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            case RoundRect:
 
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                painter.drawRoundRect(rect);
 
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                break;
 
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            case Ellipse:
 
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                painter.drawEllipse(rect);
 
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                break;
 
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            case Arc:
 
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                painter.drawArc(rect, startAngle, arcLength);
 
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                break;
 
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            case Chord:
 
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                painter.drawChord(rect, startAngle, arcLength);
 
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                break;
 
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            case Pie:
 
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                painter.drawPie(rect, startAngle, arcLength);
 
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                break;
 
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            case Path:
 
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                painter.drawPath(path);
 
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                break;
 
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            case Text:
 
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                painter.drawText(rect, Qt::AlignCenter, tr("Qt by\nTrolltech"));
 
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                break;
 
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            case Pixmap:
 
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                painter.drawPixmap(10, 10, pixmap);
 
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            }
 
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            painter.restore();
 
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        }
 
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    }
 
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}