[gtkada] How to set the pixbuf attribute of a gtk_cell_renderer_pixbuf

[Rob Groen]

Thanks Dmitry, sorry for the long delay in replying

Dmitry A. Kazakov wrote:
> On Sun, 24 Aug 2008 12:36:12 +0200, you wrote:
>
>   
>> How do you set the pixbuf property of a Gtk_Cell_Renderer_Pixbuf ?
>> The property type is a Glib.Properties.Property_Object, but a Pixbuf is 
>> derived from Glib.C_Proxy.
>>
>> So, the compiler won't accept a call to Glib.Properties.Set_Attribute 
>> with a Pixbuf as parameter, and there are no type conversions that make 
>> sense
>>     
>
> Hmm, Set_Property or Add_Attribute? There is no Set_Attribute.
>   
I meant Set_Property. That was my first attemp and obviously not the 
right one. However, this still leaves the question of how to set the 
pixbuf property of a gtk_cell_renderer_pixbuf with Set_Property
> What are you going to achieve? Normally, you create a renderer, pack it
> into a column and then add an attribute to bind the column, the renderer
> and a model column containing the image or its name together. Sort of:
>
>    declare
>       Column_No : GInt;
>       Column    : Gtk_Tree_View_Column;
>       Icon      : Gtk_Cell_Renderer_Pixbuf;
>    begin
>        -- The first visible column will be an image of the model's column 0
>       Gtk_New (Column);
>       Set_Title (Column, "Icon");
>       Gtk_New (Icon);
>       Pack_Start (Column, Icon, True);
>       Add_Attribute (Column, Icon, "pixbuf", 0);
>       Column_No := Append_Column (Tree_View, Column);
>       ...
>
> Usually you never need to set this property manually. It is the job of the
> tree view widget. It will permanently reset this property when it needs to
> render the column. So it makes little or no sense to set or query it.
>
>   
Indeed, that is the way I've done it. Thnx

Rob