win32: disable/enable gadget repainting

BlitzMax Forums/MaxGUI Module/win32: disable/enable gadget repainting

skn3	(Posted 2011) [#1]

Well today, by accident, I stumbled across a win32 feature that I didn't know existed! I have been doing win32 development on and off for years so it came as a very nice surprise.

The two functions should let you enable/disable painting of a particular gadget. Child gadgets should also respect this. If you want to perform a large update to a gadgets contents or anything that maxgui tends to struggle with (without being slow) then these functions should help.

If anyone else makes a osx version then let me know and I'll add to the code.

Function DisableGadgetRedraw(gadget:TGadget)
	' --- change a gadget repaint ability ---
	?Win32
		SendMessageW(QueryGadget(gadget,QUERY_HWND),WM_SETREDRAW,False,0)
	?
End Function

Function EnableGadgetRedraw(gadget:TGadget)
	' --- change a gadget repaint ability ---
	?Win32
		SendMessageW(QueryGadget(gadget,QUERY_HWND),WM_SETREDRAW,True,0)
	?
End Function

Last edited 2011