Re: Gtk.Image.Gtk_Image

["Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>]

On 2022-03-25 20:37, Thomas wrote:
> In article <t1jr00$1ja4$1@gioia.aioe.org>,
>   "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> wrote:
> 
>> I am using Gtk_Image in Gtk_Box, it works perfectly well, and worked in
>> GTK 2 (I am using GTK 3).
> 
> (Gtk_Pixmap were fully removed from GTK 3)

It is Gdk_Pixbuf now.

> afaiu, the specific thing about Gtk_Pixmap is that i need not to call
> Show on it, calling Show on its parent is enough.

No, I think that pixmap handles the Draw signal, so you do not need Show 
because all rendering optimizations are turned off.

> but, I thought calling Show on a container was recursive on its childs,
> wrong?

It is recursive, but it affects only actual children. New children are 
hidden by default. I think this is going to change in GTK 4.

> is it ok, or do you think i should avoid it anyway?

My understanding is that some widgets are optimized not to process 
signals from input devices, e.g. Gtk_Label and Gtk_Image. Because 
normally, you would not use keyboard or mouse buttons on them. But if 
you need that, you add Gtk_Event_Box. If things work without it, then 
leave it as is.

> if i should avoid it, is there an other Gtk_Bin that i could use, or do
> you think Gtk_Box is the only one i should use for this purpose?

I think any container is OK. I use Gtk_Box just because I want both 
label and icon on the button.

Gtk_Fixed is bad because it breaks widget resizing protocol. If you 
never resize (e.g. when changing the widget style, fonts, for example) 
then Gtk_Fixed is just fine.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de