Icons for Individuals Objects

Hi All,

How can I do to assign an icon to an individual object ?

I have a ListView and I want to display an icon inside the ListView, but
this icon depends on an attribute of the item inside the ListView.

The defalult icon for all objects is
icon
    ^self class icon

I want icon for individual objects, and I do not want to add icon attribute
to my classes. The icon for every object (in the ListView) is assigned by
IconManager class.

Thanks Bruno.

Bruno

You wrote in message news:917h35$3b00v$[hidden email]...
>
> How can I do to assign an icon to an individual object ?

Implement #icon on the instance side of your class. See CompiledMethod>>icon
for an example.

Regards

Blair

You need to use the getImageBlock of the ListView or of the ListViewColumn.
The getImageBlock gets passed the object in the list (as translated by the
getContentsBlock -- if any) and should answer the image index of the icon to
use.  E.g. if you want to reuse the tick/cross icons from the Boolean class
depending on whether #age is > 18 for each list item, you could use a block
like:

    [:each | (each age > 18) icon imageIndex]

(which depends on the value of (each age > 18) being an instance of Boolean
and hence having the desired icon).

A few things to watch out for:

Don't forget to answer the #imageIndex of the icon, not the icon itself.

If you want to set the getImageBlock for columns within a ListView then
you'll also have to give a dummy getImageBlock for the ListView as a
whole -- it isn't used, but unless the block is non-nil then Dolphin assumes
that you don't want images.  (That is from memory, it may not be necessary
any longer).

Its a good idea to save the image before testing anything like this.  If
something's wrong with your block, then you can end up with a cascade of
walkbacks which make it impossible to fix the problem.  *If* that happens
(it doesn't always, by any means) then you'll be able to kill Dolphin from
the task bar without loosing work.

    -- chris

"Bruno Buzzi" <[hidden email]> wrote in message
news:917h35$3b00v$[hidden email]... attribute
> to my classes. The icon for every object (in the ListView) is assigned by
> IconManager class.
>
> Thanks Bruno.
>
>