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How to connect a TRadioGroup to a TCheckListBox Turn on/off line numbers in source code. Switch to Orginial background IDE or DSP color Comment or reply to this aritlce/tip for discussion. Bookmark this article to my favorite article(s). Print this article
27-Aug-02
Category
VCL-General
Language
Delphi 2.x
Views
103
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Publisher:
DSP, Administrator
Reference URL:
DKB
			Author: Tomas Rutkauskas

I have a form that contains a radio groupbox with 4 items associated with it and a 
checklistbox with 4 items as well. In this case the radio box dictates which items 
in a checklistbox can be selected. For example, if the radio groupbox is set to 
item 3, that means only the first 3 items in the checklistbox can be selected. 
Therefore, if the user changes the radiobox setting to the second item, only the 
first 2 selections in the checklistbox are allowed to be marked and the third item 
that was previously checked should be cleared.

Answer:
1   
2   procedure MyProc(RadioBoxSender: TRadioGroup; CheckListBoxSender: TCheckListBox);
3   var
4     I: Integer;
5   begin
6     with CheckListBoxSender do
7       for i := 1 to 3 do { no need to do 0}
8         if i > RadioBoxSender.ItemIndex then
9           checked[i] := false;
10  end;


			
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