renderarea.cpp Example File

painting/painterpaths/renderarea.cpp
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#include "renderarea.h" #include <QPainter> RenderArea::RenderArea(const QPainterPath &path, QWidget *parent) : QWidget(parent), path(path) { penWidth = 1; rotationAngle = 0; setBackgroundRole(QPalette::Base); } QSize RenderArea::minimumSizeHint() const { return QSize(50, 50); } QSize RenderArea::sizeHint() const { return QSize(100, 100); } void RenderArea::setFillRule(Qt::FillRule rule) { path.setFillRule(rule); update(); } void RenderArea::setFillGradient(const QColor &color1, const QColor &color2) { fillColor1 = color1; fillColor2 = color2; update(); } void RenderArea::setPenWidth(int width) { penWidth = width; update(); } void RenderArea::setPenColor(const QColor &color) { penColor = color; update(); } void RenderArea::setRotationAngle(int degrees) { rotationAngle = degrees; update(); } void RenderArea::paintEvent(QPaintEvent *) { QPainter painter(this); painter.setRenderHint(QPainter::Antialiasing); painter.scale(width() / 100.0, height() / 100.0); painter.translate(50.0, 50.0); painter.rotate(-rotationAngle); painter.translate(-50.0, -50.0); painter.setPen(QPen(penColor, penWidth, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin)); QLinearGradient gradient(0, 0, 0, 100); gradient.setColorAt(0.0, fillColor1); gradient.setColorAt(1.0, fillColor2); painter.setBrush(gradient); painter.drawPath(path); }