copy.cpp

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/*
    KWin - the KDE window manager
    This file is part of the KDE project.
 
    SPDX-FileCopyrightText: 2016 Martin Gräßlin <mgraesslin@kde.org>
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <QClipboard>
#include <QGuiApplication>
#include <QPainter>
#include <QRasterWindow>
#include <QTimer>
 
class Window : public QRasterWindow
{
    Q_OBJECT
public:
    explicit Window();
    ~Window() override;
 
protected:
    void paintEvent(QPaintEvent *event) override;
    void focusInEvent(QFocusEvent *event) override;
};
 
Window::Window()
    : QRasterWindow()
{
}
 
Window::~Window() = default;
 
void Window::paintEvent(QPaintEvent *event)
{
    QPainter p(this);
    p.fillRect(0, 0, width(), height(), Qt::red);
}
 
void Window::focusInEvent(QFocusEvent *event)
{
    QRasterWindow::focusInEvent(event);
    // TODO: make it work without singleshot
    QTimer::singleShot(100, [] {
        qApp->clipboard()->setText(QStringLiteral("test"));
    });
}
 
int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);
    std::unique_ptr<Window> w(new Window);
    w->setGeometry(QRect(0, 0, 100, 200));
    w->show();
 
    return app.exec();
}
 
#include "copy.moc"