1. Win32: tabbing between control groups

  • Posted by m_sabal Feb 07, 2012
  • 1481 views

When using a Group control, at least in version 0.70.8 or earlier, use of the TAB key or SHIFT-TAB was restricted to those controls within the group. I have worked around this problem in two steps. First, I modified win32lib.ew:tab_direction() with an additional piece of logic at line 20747. 

    -- get the parent's list of tabstop controls 
    tabs = ctrl_Focus_order[ parent ] 
    id = ctrl_Current_focus[parent] 
 
	-- Added by Michael J. Sabal: 
	-- Some applications may use a control Group, but we need to tab outside the group.   
	-- Use setTabStops(GroupObject,{}) to use the Window's tab list 
	if length(tabs) = 0 and ctrl_Parent[ parent ] > 0 then 
		tabs = ctrl_Focus_order[ ctrl_Parent[ parent ] ]  
	end if

Then, in the application, I added these lines to the Group controls and Window: 

	if length(tabOrder)>0 then 
		setFocus(tabOrder[1]) 
		if sequence(setTabStops(CSWin,tabOrder)) then end if 
		if sequence(setTabStops(headerSection[1],{})) then end if 
		if sequence(setTabStops(dutiableCostSection[1],{})) then end if 
		if sequence(setTabStops(internalSection[1],{})) then end if 
	end if

The sequence tabOrder was assembled by the application as it added controls to the groups. I hope this will be of value to others who use grouped control sets.

Michael Sabal

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