[wxPython-users] How can a cell renderer refresh adjacent cells?

[Grzegorz Adam Hankiewicz]

Robin Dunn wrote:
> Grzegorz Adam Hankiewicz wrote:
>> Is there any way to do what I want (ie. refresh adjacent cells)?
> 
> You can use CellToRect to get the rectangle of each cell you want to 
> refresh, and then pass that rectangle to Refresh() or RefreshRect(). 
> Then the next paint event will include that area in its update region 
> and it won't be clipped.  You may need to adjust the rectangle for 
> scrolled position, and you may need to call the 
> grid.GetGridWindow().Refresh(...) instead of grid.Refresh(...), although 
> I seem to recall that grid refreshes get passed on to the component 
> windows so it may not be necessary.

Turns out forcing a refresh wasn't good at all. It only works when you 
click on the scrollbar, not when you drag (I presume I would have to 
adjust here the position to compensate the dragging), plus I got 
sometimes permanent flickering due to cells looping infinitely over a 
refresh/draw cycle, possibly due to incorrect screen coordinates 
calculations.

I solved it in another way: get the rect position of the adjacent cell 
which I consider the 'master', then draw everything using its position 
but clipping to the region passed to the cell renderer. This works 
really nice.

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	Grzegorz Adam Hankiewicz
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