Revision control
++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "renderarea.h"
++
++ #include <QPainter>
++
++ //! [0]
++ RenderArea::RenderArea(const QPainterPath &path, QWidget *parent)
++ : QWidget(parent), path(path)
++ {
++ penWidth = 1;
++ rotationAngle = 0;
++ setBackgroundRole(QPalette::Base);
++ }
++ //! [0]
++
++ //! [1]
++ QSize RenderArea::minimumSizeHint() const
++ {
++ return QSize(50, 50);
++ }
++ //! [1]
++
++ //! [2]
++ QSize RenderArea::sizeHint() const
++ {
++ return QSize(100, 100);
++ }
++ //! [2]
++
++ //! [3]
++ void RenderArea::setFillRule(Qt::FillRule rule)
++ {
++ path.setFillRule(rule);
++ update();
++ }
++ //! [3]
++
++ //! [4]
++ void RenderArea::setFillGradient(const QColor &color1, const QColor &color2)
++ {
++ fillColor1 = color1;
++ fillColor2 = color2;
++ update();
++ }
++ //! [4]
++
++ //! [5]
++ void RenderArea::setPenWidth(int width)
++ {
++ penWidth = width;
++ update();
++ }
++ //! [5]
++
++ //! [6]
++ void RenderArea::setPenColor(const QColor &color)
++ {
++ penColor = color;
++ update();
++ }
++ //! [6]
++
++ //! [7]
++ void RenderArea::setRotationAngle(int degrees)
++ {
++ rotationAngle = degrees;
++ update();
++ }
++ //! [7]
++
++ //! [8]
++ void RenderArea::paintEvent(QPaintEvent *)
++ {
++ QPainter painter(this);
++ painter.setRenderHint(QPainter::Antialiasing);
++ //! [8] //! [9]
++ painter.scale(width() / 100.0, height() / 100.0);
++ painter.translate(50.0, 50.0);
++ painter.rotate(-rotationAngle);
++ painter.translate(-50.0, -50.0);
++
++ //! [9] //! [10]
++ 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);
++ }
++ //! [10]