TImage and LoadFromLazarusResource()
lazarus / 8-Other

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Bart · 2006-01-28 17:56

Hi there,

I have a form with a TImage on it.
In a resource file (made with "lazres xpmres.lrs appicon.xpm") there
is a XPM icon called "appicon".
I linked in the resource with:Code: [Select]initialization
  {$I utest.lrs}
  {$I xpmres.lrs}

When I run this code:Code: [Select]begin
  try
    Image1.Picture.Graphic.LoadFromLazarusResource('appicon');
  except
    showmessage('Oops !');
  end;
end;
it will give me the "Oops!" message (no Icon loaded in Image1).

Now I runCode: [Select]begin
  try
    Image1.Picture.LoadFromFile('f:\lazarus projecten\9.xpm');
  except
    showmessage('Error on LoadFromFile'');
  end;
end;

this will load the "9.xpm" icon into Image1.

Now comes the strange part.
If I now run the first code again, the "appicon" will now load from
the resource.
I cannot figure out what's going on here.

FYI:
OS: WinME (Dutch)
Lazarus version: 0.9.10 beta
Lazarus date: 2005-10-05

What am I doing wrong?

Bart

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matthijs · 2006-01-29 11:58

Maybe you can create a backtrace on the error? This might give people
who know about it a clue.

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Anonymous · 2006-01-29 12:28

Graphic of TPicture needs to be initialized.
That's why you get an AV on first try.
After loading a bitmap it is initialized as a bitmap.
You can use
Image1.Picture.Pixmap.LoadFromLazarusResource('appicon');

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Bart · 2006-01-30 17:52

Quote from: "Anonymous"Graphic of TPicture needs to be initialized.
That's why you get an AV on first try.
After loading a bitmap it is initialized as a bitmap.
You can use
Image1.Picture.Pixmap.LoadFromLazarusResource('appicon');
OK, that explains it.
The code you supplied works perfectly, thank you.

Related with this item

I seem not to be able to perform any LoadFromFile operations on the
Application.Icon. Do I need to initialize this first too, and how to
do that then?

Bart