displaywidget.cpp Example File

svggenerator/displaywidget.cpp
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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; } void DisplayWidget::paintEvent(QPaintEvent * /* event */) { QPainter painter; painter.begin(this); painter.setRenderHint(QPainter::Antialiasing); paint(painter); painter.end(); } void DisplayWidget::paint(QPainter &painter) { 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]); } 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(); }