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Value List Editor

Posted on 2004-08-09
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Last Modified: 2012-05-05
hello,

was using the value list editor, i wanted to change the color of the cell (first column) to clRed when the cell (second column) is edited , i tried this code in the DrawCellEvent :

if  (gdFocused in State) then begin
     vle.Canvas.Brush.Color := clRed;
    vle.Canvas.FillRect(Rect);
end;
0
Comment
Question by:yehiaeg
  • 3
  • 3
7 Comments
 
LVL 7

Expert Comment

by:LRHGuy
ID: 11759334
This works for me, but you have to have the goRowSelect option turned on...

procedure TForm2.vleDrawCell(Sender: TObject; ACol,
  ARow: Integer; Rect: TRect; State: TGridDrawState);
var
  T:string;
  Item:TItemProp;
begin
if (ARow=vle.Row)
and (ACol=0)
then begin
     vle.Canvas.Brush.Color := clRed;
    vle.Canvas.FillRect(Rect);
    Item:=vle.ItemProps[vle.Row];
    if (Item<>nil) and (Item.KeyDesc<> '') then
      T:=Item.KeyDesc
    else
      T:=vle.Cells[ACol, ARow];
    vle.Canvas.TextRect(Rect,Rect.Left+2,Rect.Top+2,T);
end;
end;


  object vle: TValueListEditor
    Left = 16
    Top = 108
    Width = 306
    Height = 144
    Options = [goFixedVertLine, goFixedHorzLine, goVertLine, goHorzLine, goDrawFocusSelected, goColSizing, goEditing, goRowSelect, goThumbTracking]
    Strings.Strings = (
      'one=two'
      'three=four'
      'five=six')
    TabOrder = 2
    OnDrawCell = vleDrawCell
  end
0
 

Author Comment

by:yehiaeg
ID: 11760058
yea but when goRowSelect is on, i can't edit the second column
0
 
LVL 17

Expert Comment

by:Wim ten Brink
ID: 11760646
Did you set DefaultDrawing to False? This is required if you don't want the editor to draw over your own drawings. :-)
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LVL 7

Expert Comment

by:LRHGuy
ID: 11761547
From what I can tell, setting DefaultDrawing to false means you MUST draw the complete cell, everytime. Leaving it at True will have the component draw the cell, then call the onDrawCell event. The event method is called after the cell is drawn (DefaultDrawing=true) or after the drawing is skipped (DefaultDrawing=false).

My example leaves DefaultDrawing=true, then only draws column 0 of the active row.
0
 

Author Comment

by:yehiaeg
ID: 11761942
guys, it draw correctly when setting goRowselect to true, but the PROBLEM IS i can't edit anything now in the cells, cause when setting goRowSelect to True goAlwaysShowEditor is turned to False automatically,

when setting goRowSelect to false, i can now edit any cell but the drawcell event won't work,

any ideas?
0
 
LVL 7

Accepted Solution

by:
LRHGuy earned 500 total points
ID: 11762303
Ok, try this...

set goRowSelect to false.

In the onselectcell event, put:

vle.invalidate

Everything else should stay as in my example.

That fixed it here!
0
 

Author Comment

by:yehiaeg
ID: 11763669
thanks man, keep answering, have lots of other questions about value list editor
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