#ifndef FRAMELESSHANDLER_H
#define FRAMELESSHANDLER_H

#include <QObject>
#include <QPoint>

// This concept takes from Qt's QWidgetResizeHandler, but it's not
// a public Qt API so we cannot relay on it...

QT_BEGIN_NAMESPACE
class QMouseEvent;
QT_END_NAMESPACE

class FramelessHandler : public QObject
{
    Q_OBJECT
public:
    explicit FramelessHandler(QWidget *parent = nullptr);

protected:
    bool eventFilter(QObject *o, QEvent *event) override;

    void mouseMoveEvent(QMouseEvent *evt);
    void setMouseCursor(Qt::Edges edge);

    bool startSystemResize(Qt::Edges edges);
    bool startSystemMove();

private:
    QWidget * m_parentWidget = nullptr;
    QPoint m_oldMousePos;
    bool m_clickedOnWindow = false;
    static constexpr int m_borderWidth = 8;
};

#endif // FRAMELESSHANDLER_H