/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the examples of the Qt Toolkit.

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include <QtGui>

#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]