Re: [wxlua-users] wxGrid scroll event

[John L. <jla...@gm...>]

On Wed, Aug 29, 2012 at 2:48 PM, Milind Gupta <mil...@gm...> wrote:
> Hi,
>         I have 2 wxGrid windows side by side and I want to synchronize the
> scroll on the 2 windows. The scroll event works fine but when I read the
> scroll position of the window and set the scroll on the other window it does
> not sync up. There is a lag. It seems that the actual scroll happens after
> my event handler is processed so my other window always gets to the position
> where the 1st one was before.

Where are you getting the scroll position from? The event or the
window itself? You should compare the two.

> Is there a way to let the scroll happen and then read the scroll position?
> The wxWidgets forum said that there is a hidden function called
> HandleOnScroll, which I tried but it does not work in wxLua. Is there any
> other way?

If you want to process something after an event comes, create a new
event with whatever event type you want and a unique id you can use to
discriminate it and add it as a pending event to be sent after the
current event is handled.

local updateEvent = wx.wxCommandEvent(wx.wxEVT_COMMAND_BUTTON_CLICKED,
ID_REFRESH_GRID_SCROLL);
mywindow:GetEventHandler():AddPendingEvent(updateEvent);

then when you get this event in your handler for it, sync the scrollbars.

Regards,
    John