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THittest when double-clicking item in TListView not working right...

Posted on 2014-07-17
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Last Modified: 2014-07-20
Hi Experts, I'm trying to detect what item is double-clicked on in my TListView. Googling around, I found code from Mr. Zarko Gajic explaining exactly how to do that:

http://delphi.about.com/od/vclusing/a/lv_item_click.htm

First off, it wouldn't compile correctly on this line:

for ht in hts do

... saying "For loop control variable must be simple local variable". So I just got rid of that section of code, seeing as how it's just a "debug" section anyhow.
   The problem lies in the statement:

if hts <= [htOnIcon, htOnItem, htOnLabel, htOnStateIcon] then

... it never seems to get satisfied - no matter where I double-click in my TListView items. Variable "hts" *always* seems to have the value :

[htAbove, htOnStateIcon,,htToLeft]

... and therefore never satisfies the IF statement. Backtracking a bit in the code, I assume hts is getting bad values because of what it gets fed by ListViewCursosPos.X and ListViewCursosPos.Y. ListViewCursosPos.X seems to have a value of -38 (minus 38) and ListViewCursosPos.Y has a value of -335. That can't be right. Backtracking further from that, the ListView1.ScreenToClient procedure must be feeding it bad values. Anyone have any idea what's going on?

Thanks!
    Shawn
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Question by:shawn857
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2 Comments
 
LVL 27

Accepted Solution

by:
Sinisa Vuk earned 500 total points
ID: 40203963
in yours another question ... I use simple:
var
  itm: TListItem;
begin
  itm := ListView1.Selected;
  if Assigned(itm) then
    ExchangeItems(ListView1, itm.Index);

Open in new window



...add: rowselect is set to True.
0
 

Author Closing Comment

by:shawn857
ID: 40207558
Thank you very much Sinisa!

Shawn
0

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