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

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#include <QtGui>

#include "displaywidget.h"

DisplayWidget::DisplayWidget(QWidget *parent)

    : QWidget(parent)

{

    QPainterPath car;

    QPainterPath house;

    QFile file(":resources/shapes.dat");

    file.open(QFile::ReadOnly);

    QDataStream stream(&file);

    stream >> car >> house >> tree >> moon;

    file.close();

    shapeMap[Car] = car;

    shapeMap[House] = house;

    background = Sky;

    shapeColor = Qt::darkYellow;

    shape = House;

}

//! [paint event]

void DisplayWidget::paintEvent(QPaintEvent * /* event */)

{

    QPainter painter;

    painter.begin(this);

    painter.setRenderHint(QPainter::Antialiasing);

    paint(painter);

    painter.end();

}

//! [paint event]

//! [paint function]

void DisplayWidget::paint(QPainter &painter)

{

//![paint picture]

    painter.setClipRect(QRect(0, 0, 200, 200));

    painter.setPen(Qt::NoPen);

    switch (background) {

    case Sky:

    default:

        painter.fillRect(QRect(0, 0, 200, 200), Qt::darkBlue);

        painter.translate(145, 10);

        painter.setBrush(Qt::white);

        painter.drawPath(moon);

        painter.translate(-145, -10);

        break;

    case Trees:

    {

        painter.fillRect(QRect(0, 0, 200, 200), Qt::darkGreen);

        painter.setBrush(Qt::green);

        painter.setPen(Qt::black);

        for (int y = -55, row = 0; y < 200; y += 50, ++row) {

            int xs;

            if (row == 2 || row == 3)

                xs = 150;

            else

                xs = 50;

            for (int x = 0; x < 200; x += xs) {

                painter.save();

                painter.translate(x, y);

                painter.drawPath(tree);

                painter.restore();

            }

        }

        break;

    }

    case Road:

        painter.fillRect(QRect(0, 0, 200, 200), Qt::gray);

        painter.setPen(QPen(Qt::white, 4, Qt::DashLine));

        painter.drawLine(QLine(0, 35, 200, 35));

        painter.drawLine(QLine(0, 165, 200, 165));

        break;

    }

    painter.setBrush(shapeColor);

    painter.setPen(Qt::black);

    painter.translate(100, 100);

    painter.drawPath(shapeMap[shape]);

//![paint picture]

}

//! [paint function]

QColor DisplayWidget::color() const

{

    return shapeColor;

}

void DisplayWidget::setBackground(Background background)

{

    this->background = background;

    update();

}

void DisplayWidget::setColor(const QColor &color)

{

    this->shapeColor = color;

    update();

}

void DisplayWidget::setShape(Shape shape)

{

    this->shape = shape;

    update();

}