public virtual void AddInputEventListener(PInputEventListener listener) {
KeyDown += listener.OnKeyDown;
KeyPress += listener.OnKeyPress;
KeyUp += listener.OnKeyUp;
Click += listener.OnClick;
DoubleClick += listener.OnDoubleClick;
MouseDown += listener.OnMouseDown;
MouseUp += listener.OnMouseUp;
MouseMove += listener.OnMouseMove;
MouseDrag += listener.OnMouseDrag;
MouseEnter += listener.OnMouseEnter;
MouseLeave += listener.OnMouseLeave;
MouseWheel += listener.OnMouseWheel;
DragEnter += listener.OnDragEnter;
DragLeave += listener.OnDragLeave;
DragOver += listener.OnDragOver;
DragDrop += listener.OnDragDrop;
GotFocus += listener.OnGotFocus;
LostFocus += listener.OnLostFocus;
}
