rem: static unsigned defDraggingEntered(WMView *self, WMDraggingInfo *info)
add: defDraggingEntered(WMView *self, WMDraggingInfo *info)
context: static unsigned defDraggingEntered(WMView *self, WMDraggingInfo *info){    printf("%x drag entered\n", W_VIEW_DRAWABLE(self));    return WDOperationNone;}