Task bar button in Delphi 2007

Trond Grøntoft

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Mar 23, 2007, 2:56:44 PM3/23/07

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I compiled one of my applications with Delphi 2007, and discovered that the
taskbar button does not appear. The same thing happens with the
VirtualListView Demo project. Is there anything I need to do to get my
taskbar button back?

- Trond

Rick Carter

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Mar 23, 2007, 3:57:51 PM3/23/07

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Did you read the messages in the "D2007 affecting D2006?" thread?
It sounds like it may be related.

Rick Carter
cart...@despammed.com
Chair, Delphi/Paradox SIG, Cincinnati PC Users Group

--- posted by geoForum on http://delphi.newswhat.com

Trond Grøntoft

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Mar 23, 2007, 3:21:41 PM3/23/07

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This message was apparently cancelled by a mistake.
Reposting....
- - -

Trond Grøntoft

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Mar 23, 2007, 3:29:27 PM3/23/07

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"Rick Carter" wrote

> Did you read the messages in the "D2007 affecting D2006?" thread?
> It sounds like it may be related.

Yes I saw that one, but I was hoping there was something I could do to fix
this. I have made a few other test programs and they work as expected.

- Trond

Jeff Hamblin

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Mar 23, 2007, 4:38:43 PM3/23/07

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"Trond Grøntoft":

There is a new property of TApplication "MainFormOnTaskBar".
This defaults to False for existing applications opened in D 2007,
but defaults to True for new applications. This may be why your
test apps behaved differently.

Try inserting in the application DPR:
(just after: Application.Initialize;)
Application.MainFormOnTaskBar := True;

This has other consequences, but give it a try.

-Jeff Hamblin

Atle Smelvær

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Mar 23, 2007, 5:02:25 PM3/23/07

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It's related to Vista changes, there are one QC report on some of the
problems:
http://qc.codegear.com/wc/qcmain.aspx?d=43007

-Atle

Freddy

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Mar 23, 2007, 6:14:02 PM3/23/07

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If you dont want the trouble you run into when using
Application.MainFormOnTaskBar you can do the following:

I have a splash screen so I have..

Application.ShowMainForm := False;

frmMain.Show;
ShowWindow(frmMain.Handle,SW_SHOW);

This way the taskbar button appears and never leaves you again.
I did not see any of the mentioned problems yet.

To CodeGear:
I must say I'm getting a bit dissappointed by seeing every "fix" (in this
case the vista minimize thumbnail/screenshot thingy issue) having severe
side effects or other bugs.
I just found out this "vista ready" product doesnt support PNG compressed
vista icons as well... *sigh*

Regards,
Freddy

"Trond Grøntoft" <tr...@tiger-removethis.no> wrote in message
news:460428d1$1...@newsgroups.borland.com...

Dave Nottage [TeamB]

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Mar 23, 2007, 7:37:55 PM3/23/07

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Freddy wrote:

> If you dont want the trouble you run into when using
> Application.MainFormOnTaskBar you can do the following:
>
> I have a splash screen so I have..
>
> Application.ShowMainForm := False;
>
> <show splash>
> <do stuff>
> <hide splash>
>
> frmMain.Show;
> ShowWindow(frmMain.Handle,SW_SHOW);
>
> This way the taskbar button appears and never leaves you again.

So does this way:

Splash := TSplash.Create(nil);
Splash.Show;
// Do stuff
Application.CreateForm(TfrmMain, frmMain);
Splash.Close;

No need to call ShowWindow, or to have ShowMainForm as False.

--
Dave Nottage [TeamB]

Trond Grontoft

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Mar 23, 2007, 6:41:14 PM3/23/07

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> There is a new property of TApplication "MainFormOnTaskBar".
> This defaults to False for existing applications opened in D 2007,
> but defaults to True for new applications. This may be why your
> test apps behaved differently.
>
> Try inserting in the application DPR:
> (just after: Application.Initialize;)
> Application.MainFormOnTaskBar := True;
>
> This has other consequences, but give it a try.

Thanks.
I tested this on the VirtualListView demo, but the problem remains the same.

- Trond

Freddy

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Mar 23, 2007, 8:59:33 PM3/23/07

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Forgot to mention i'm talking about a D2006 app loaded in D2007 (so
MainFormOnTaskBar = False).

"Dave Nottage [TeamB]" <dav...@radsoft.com.au> wrote in message
news:4604...@newsgroups.borland.com...

> So does this way:
>
> Splash := TSplash.Create(nil);
> Splash.Show;
> // Do stuff
> Application.CreateForm(TfrmMain, frmMain);
> Splash.Close;

> Dave Nottage [TeamB]

Freddy

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Mar 23, 2007, 8:57:33 PM3/23/07

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Eh.. will that show the taskbar button using D2007 without using
MainFormOnTaskBar ?
(I admit I didnt try)

"Dave Nottage [TeamB]" <dav...@radsoft.com.au> wrote in message
news:4604...@newsgroups.borland.com...

Trond Grontoft

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Mar 24, 2007, 11:42:01 AM3/24/07

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"Jeff Hamblin" wrote

> Try inserting in the application DPR:
> (just after: Application.Initialize;)
> Application.MainFormOnTaskBar := True;
>
> This has other consequences, but give it a try.

I had a look at the TApplicationHelper source code and found if I put the...

Application.MainFormOnTaskBar := True;

...AFTER the Application.CreateForm statment, the button is displayed on the
statusbar. I'm not sure if there are any side effects to this, so I ended up
overrididing the CreateParams method and added WS_EX_APPWINDOW to
Params.ExStyle.

- Trond

Dave Nottage [TeamB]

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Mar 25, 2007, 8:50:03 AM3/25/07

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Freddy wrote:

> Eh.. will that show the taskbar button using D2007 without using
> MainFormOnTaskBar ? (I admit I didnt try)

If by "using" you mean setting it to True, yes you need to do that, but
it is a trivial thing to do.

--
Dave Nottage [TeamB]

hei...@gmail.com

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Apr 13, 2007, 4:23:00 AM4/13/07

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I noticed that if I set the Visible property to True on the main form,
the taskbar button is not shown. Make sure Visible=False on the main
form.

Regards,
Hein