Solved

Problem with TAB on a form

Posted on 1998-06-19
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Last Modified: 2008-02-01
On form1 I drop about 10 Edit Controls. I move to controls with TAB key. When I'm on the 10th edit, I go to the first with tab.OK.

Next, I create  form2 as child (like a toolbar) of form1.
Now , when I'm on the 10th edit, if I press TAB, I go to the form2, then (next tab) to the first edit.

How avoid this ?
How exclude the form2 from the "tab circle" ?
I want to never set the focus to the form2 when I press TAB.
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Question by:jpdupont
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8 Comments
 
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Accepted Solution

by:
vladika earned 100 total points
ID: 1354153
property TabStop
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Author Comment

by:jpdupont
ID: 1354154
A form had a TabStop property ???
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Expert Comment

by:vladika
ID: 1354155
Yes, in run-time mode

Any WinControl has TabStop property (see in help)
Some controls has public TabStop property
others controls has published TabStop property

Form has PUBLIC TabStop property

write handler OnFormCreate
  Form.TabStop := False;

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Expert Comment

by:vladika
ID: 1354156
Also you can override procedure GetTabOrderList(List: TList)

For example
type
  TForm1 = class(TForm)
  public
    procedure GetTabOrderList(List: TList); override;
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.GetTabOrderList(List: TList);
var
  I: Integer;
  P: TWinControl;
begin
  inherited GetTabOrderList(List);
  if (ActiveControl = nil) or (ActiveControl.Parent = nil) then Exit;
  P := ActiveControl.Parent;
  for I := List.Count-1 downto 0 do
    if P <> TControl(List[I]).Parent then List.Delete(I);
end;
// In this example "tab circle" is controls which have same parent as ActiveControl

0
 

Author Comment

by:jpdupont
ID: 1354157
Vladika,

Thanks for the help.
1/I just try the TabStop property (OnCreate ...) : don'twork.
2/I see your comment, and I try this as soon as possible.

Thanks again
Jean-Pol
0
 

Author Comment

by:jpdupont
ID: 1354158
Hi,
Your code don't work.
I put this in the code to create a child window :

procedure TWCombo.CreateParams(var Params: TCreateParams);
begin
  inherited CreateParams(Params);
  with Params do begin
    Style := (Style or WS_CHILD) and (not WS_POPUP);
    WndParent := Application.MainForm.Handle;
  end;
  Parent := Application.MainForm;
end;

Correct ?

Regards,
JP
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LVL 3

Expert Comment

by:vladika
ID: 1354159
Hi!

1) From which is TWCombo inherited?
2) Is TWCombo design-time component?
3) I think CreateParams should look as

procedure TWCombo.CreateParams(var Params: TCreateParams);
begin
  inherited CreateParams(Params);
  with Params do
    Style := (Style or WS_CHILD) and (not WS_POPUP);
end;

. and when you create TWCombo ...
W := TWCombo.Create(Form1);
W.TabStop := False;
W.Parent := Form1;
......... W initialization (set height, width etc)........

4) if you wish you can send me program by email demon@dezcom.mephi.ru or
Dmitri_Ulitski@dialogbank.com and I try to help you
5) sorry for english :)

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LVL 3

Expert Comment

by:vladika
ID: 1354160
Answer is
1) use TabStop property to exclude/include control from/in "tab circle"
2) use GetTabOrderList for full "tab circle" control


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