#include "rm_widget_drag.h"
#include <QMouseEvent>
#include <Windows.h>

RMWidgetDrag::RMWidgetDrag(QWidget *target,int titleBarHeight) : QObject(target)
{
    _target = target;
    _dragStart = false;
    _titleBarHeight = titleBarHeight;
    _target->installEventFilter(this);
}

RMWidgetDrag::~RMWidgetDrag()
{
    _target->removeEventFilter(this);
}

bool RMWidgetDrag::eventFilter(QObject *o, QEvent*e)
{
    // Alt+Enter 방지
    if(e->type()  == QEvent::WindowActivate)
    {
        //qInfo() << __FUNCTION__ << e->type();
        ::RegisterHotKey((HWND)_target->winId(),
                         998,
                         MOD_ALT | MOD_NOREPEAT,
                         VK_RETURN);
    }
    else if (e->type()  == QEvent::WindowDeactivate)
    {
        //qInfo() << __FUNCTION__ << e->type();
        ::UnregisterHotKey((HWND)_target->winId(),998);
    }

    Q_UNUSED(o);
#if (USE_KEY_EVENT_FOR_SEEK)
    if(e->type() ==  QEvent::KeyPress || e->type() == QEvent::KeyRelease)
    {
        QKeyEvent* ke = static_cast<QKeyEvent*>(e);
        if(ke->isAutoRepeat() == true)
        {
            return false;
        }
        qInfo() << "KE:" << ((e->type() ==  QEvent::KeyPress) ? "P" : "R");
    }
#endif

#if (DESIGN_LAYOUT_MODE)
    if( e->type() == QEvent::MouseButtonPress)
    {
        // CHILD 는 적용안됨.. 어..쩔..
        QMouseEvent* me = static_cast<QMouseEvent*>(e);
        qInfo() << me->pos();
    }
#endif // DESIGN_LAYOUT_MODE

    if (_target->isMaximized() == false &&
        _target->isFullScreen() == false &&
        (e->type() == QEvent::MouseMove ||
         e->type() == QEvent::MouseButtonPress ||
         e->type() == QEvent::MouseButtonRelease))
    {
        QMouseEvent* me = static_cast<QMouseEvent*>(e);
        switch (e->type())
        {
            case QEvent::MouseMove:
                if (_dragStart)
                {
                    _target->move(_target->frameGeometry().topLeft() + (me->pos() - _dragPos));
                    emit onWindowMove();
                }
                return true;    // discard
                break;
            case QEvent::MouseButtonPress:
                if (_target->rect().contains(me->pos()) && me->pos().y() < _titleBarHeight)
                {
                    _dragStart = true;
                    _dragPos = me->pos();
                }
                return true;    // discard
                break;
            case QEvent::MouseButtonRelease:
                _dragStart = false;
                //mouseRealese(static_cast<QMouseEvent*>(e));
                return true;    // discard
                break;
        }
    }
    return false;
}