[solved] Imagelist not shown on form
lazarus / 39-Graphics

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jeanchristophe · 2013-10-17 07:44

Hello

I am still a newbie, and I have problems with the component TImagelist
on Lazarus 1.0.12 on windows (XP).
I have a imagelist component on my form.
I load som pictures in it.
debug the project and I see nothing, the form i empty.

I made a mistake, that is for sure, but wich?
In the properties list, I have not so many possibilities (11), and it
is looking like, I am missing some.
Can you please tell me, what's can be wrong?

Best Regards
Jean-Christophe

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taazz · 2013-10-17 08:38

What do you expect to see on the form specifically?

Imagelist is a non visual components that keeps a list of images in
memory to be used by various components like menus, treeviews,
listviews and others to show small icons imagelist crops or shrinks
all images to a specific size defined by the properties height and
width. For more information try searching the wiki for timagelist.

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jeanchristophe · 2013-10-17 09:15

Hello taazz,

Thank you for your answer!
Maybe can you help me to find the component I need!
I have a database where I kept the pictures file path.
I would like to read these pictures in a component, where I will have
a preview of the pictures and choose them by a click, If I want to.
Do you know, where I have to fetch?

Best Regards
Jean-Christophe

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taazz · 2013-10-17 09:21

I think you are looking for a TImage it will show a single picture
inside a form and it has events (eg onclick) that you can use to
respond and take action. It is capable of showing only a single
picture.

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jeanchristophe · 2013-10-17 09:34

Then I have to finde a container where the path will be read and will
create a TImage for each pictures.
Now, I have to find the right container!
Is it a discussion we can continue here, or do I have to move my
question(s) somewhere else?

Best Regards
Jean-Christophe

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taazz · 2013-10-17 09:53

What kind of container? I do not understand what you want. As far as I
remember the Timage control can load image directly from disk using
Image1.Picture.LoadFromFile(MyFilename); it does not need a
"container" of any kind what problem do you have with TImage?

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jeanchristophe · 2013-10-17 10:32

I don't have problems with Timage 
What I want is to get preview of 100 or 1000 imageS.
As far as I know, you can just have 1 image in a TImage. Right now I
am looking at a Tlistview who can maybe be the tool, I am looking for,
if I can scale the previews, as I want.

Best Regards
Jean-Christophe

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howardpc · 2013-10-17 10:56

Have you tried something as simple as TOpenPictureDialog combined with
a TImage?
Depending on your OS this dialog is quite flexible, offering previews
etc.
If such a basic picture selection process is good enough, then having
set the dialog's properties appropriately, code like this is all you
need:
Code: [Select]procedure TForm1.Button1Click(Sender: TObject);
begin
  if OpenPictureDialog1.Execute then
   Image1.Picture.LoadFromFile(OpenPictureDialog1.FileName);
end;

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jeanchristophe · 2013-10-17 11:00

Thank you for your answer howardpc

I think, i am going to close the topic, because I think, I have found
the way to do it.
I found a software wrotted with Lazarus called PicViewer.
I believe that it has, what I am looking for.

Thank you for your interest and your time.
Have a nice day.

Best Regards
Jean-Christophe