SCROLL_CB
Called when some manipulation is made to the scrollbar. When this attribute is defined, the ACTION callback is not called in such cases.
Callback
int function(Ihandle *self, int op, float posx, float posy); [in C] elem:scroll(op, posx, posy: number) -> (ret: number) [in IupLua3] elem:scroll_cb(op, posx, posy: number) -> (ret: number) [in IupLua5]op: indicates the operation performed on the scrollbar.
If the manipulation was made on the vertical scrollbar, it can have the following values:IUP_SBUP - line up IUP_SBDN - line down IUP_SBPGUP - page up IUP_SBPGDN - page down IUP_SBPOSV - vertical position IUP_SBDRAGV - vertical dragIf it was on the horizontal scrollbar, the following values are valid:
IUP_SBLEFT - column left IUP_SBRIGHT - column right IUP_SBPGLEFT - page left IUP_SBPGRIGHT - page right IUP_SBPOSH - horizontal position IUP_SBDRAGH - horizontal dragposx, posy: the same as the ACTION canvas callback (corresponding to the values of attributes IUP_POSX and IUP_POSY).