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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include <QtGui>
constexpr qreal border = 20;
class Window : public QRasterWindow
{
public:
explicit Window(QWindow *parent = nullptr) : QRasterWindow(parent)
{
resize(300, 200);
setMinimumSize(QSize(border*2, border*2));
}
protected:
void resizeOrMove(const QPointF &p);
bool event(QEvent *event) override;
void paintEvent(QPaintEvent *event) override;
};
void Window::resizeOrMove(const QPointF &p)
{
Qt::Edges edges;
if (p.x() > width() - border)
edges |= Qt::RightEdge;
if (p.x() < border)
edges |= Qt::LeftEdge;
if (p.y() < border)
edges |= Qt::TopEdge;
if (p.y() > height() - border)
edges |= Qt::BottomEdge;
if (edges != 0) {
qDebug() << "startSystemResize" << edges;
if (startSystemResize(edges))
qDebug() << " -> supported";
else
qDebug() << " -> not supported";
} else {
qDebug() << "startSystemMove";
if (startSystemMove())
qDebug() << " -> supported";
else
qDebug() << " -> not supported";
}
}
bool Window::event(QEvent *event)
{
switch (event->type()) {
case QEvent::MouseButtonPress:
qDebug() << "Mouse press";
resizeOrMove(static_cast<QMouseEvent *>(event)->position());
return true;
case QEvent::TouchUpdate:
qDebug() << "Touch update";
resizeOrMove(static_cast<QTouchEvent *>(event)->points().first().position());
return true;
case QEvent::TouchBegin:
qDebug() << "Touch begin";
resizeOrMove(static_cast<QTouchEvent *>(event)->points().first().position());
return true;
case QEvent::TouchEnd:
qDebug() << "Touch end";
return true;
default:
return QRasterWindow::event(event);
}
}
void Window::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event);
QPainter painter(this);
QRect fullRect(0, 0, width(), height());
QRect innerRect = fullRect.marginsRemoved(QMargins(border, border, border, border));
painter.fillRect(fullRect, QGradient::WarmFlame);
painter.fillRect(innerRect, QGradient::NightFade);
painter.drawText(QRectF(0, 0, width(), height()), Qt::AlignCenter, QStringLiteral("Click mouse or touch to move window\nDrag along the sides to resize."));
}
int main(int argc, char **argv)
{
QGuiApplication app(argc, argv);
Window window;
window.show();
return app.exec();
}
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