Modal Application ?

Is it possible to create a modal application ?

I have a form which accepts input from a keyboard wedge laser scanner, and processes it using keypreview, keydown etc.

The only problem I come across is if someone has clicked off the form, and my application no longer has focus, then I lose scans.

So all I need it to keep my form activated whilst it is expecting scans.  A modal application kinda sounded right, but not sure if it is possible or how.

Thanks.

Dave.
dmcqueenAsked:
Who is Participating?
 
EpsylonCommented:
>Sigh<

Try this:

procedure TForm1.Deactivated(Sender: TObject);
begin
  SetForegroundWindow(Handle);
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Application.OnDeactivate := Deactivated;
end;


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TheNeilCommented:
Could you try adding a timer and get it to check if your app is active or not? If it ISN'T active when the timer fires then it makes your app active.

i.e.

IF NOT(Active)
THEN
  BringToFront;

An alternative would be to catch when the form becomes deactivated and then just use BringToFront again.

WIndows will probably stop you from modally running your app but I'm not an expert on that so 24000 people will now tell me I'm wrong.

The Neil
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EpsylonCommented:
Try this:

procedure TForm1.Deactivated(Sender: TObject);
begin
  SetForegroundWindow(Handle);
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Application.OnDeactivate := Deactivated;
end;
0
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kretzschmarCommented:
maybe also try this


unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs;

type
  TForm1 = class(TForm)
  private
    Procedure WMKillFocus(var Msg : TMessage); message WM_KILLFOCUS;
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

Procedure TForm1.WMKillFocus(var Msg : TMessage);
begin
  inherited;
  SetForeGroundWindow(self.Handle);
end;

end.

meikl
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intheCommented:
Hi
you could use form1 as a splash screen form and on  a timer call

form1.hide;{hide splash form}
form2.showmodal; {show modal app}
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rwilson032697Commented:
Listening
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MadshiCommented:
I think you should handle the message WM_ACTIVATE or WM_ACTIVATEAPP. Don't know, perhaps Epsylon's suggestion does that already.
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RadlerCommented:
A dumb solution;

1 - Make a full screem form, with stay on top
2 - copy the background image, grats to some E-E
use this at onCreate
SetWindowPos(Handle,hwnd_TopMost,Left,Top,Width,Height,swp_NoRedraw+swp_ShowWindow);
3 - Make the desired form and put over the last ( stay on top too )
4 - Avoid ALT-TAB, etc with
SystemParametersInfo(SPI_SCREENSAVERRUNNING, LongWord(True), @LongNum, 0);

I accept opinions.

T++, Radler.
0
 
kretzschmarCommented:
clever, eps ;-)
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EpsylonCommented:
I have more than 10 questions open, waiting for a response. I'm not going to wait forever.....
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rwilson032697Commented:
As an aside Epsylon, how do you tell how many open Q's you have (apart from counting them manually...)?
Cheers,

Raymond.
0
 
EpsylonCommented:
I have 19 notification emails here from 19 different questions. I have marked them and throw them away when the question's answer is accepted. 4 of them are from this week. Another 3 or 4 I did not answer. I'm there are more question but they slipped between my  fingers because I never got a notification from them. And a few weeks ago I missed a dozen notifications because of a stupid mistake of my provider.

Btw: did you receive your gift? I have not seen anything yet. And you, Meikl?
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kretzschmarCommented:
hi eps,

have ordered the gift some weeks ago,
but it didn't received me until yet :-(

meikl
0
 
intheCommented:
no gift yet for me neither :-( boo hoo
the march e.e letter says they will start shipping this month ..
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rwilson032697Commented:
I haven't received mine either yet.

Cheers,

Raymond.
0
 
chengjianCommented:
set mainform.formstyle to fsStayOnTop?
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