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| ** This file is part of the examples of the Qt Toolkit. |
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| |
| #include <QtWidgets> |
| #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(); |
| } |