Le Vendredi 17 Mars 2006 13:17, yeajchao a écrit :
> Hello everyone
> I am writing my own gtk widget
> and i want my own widget's height and width ratio is 0.8, like this:
>
> widget->allocation.height / widget->allocation.width == 0.8
>
> and my gtk_mywidget_size_allocate() function like this:
>
> -------- Start of my code
> -------------------------------------------------------
> static void
> gtk_mywidget_size_allocate(GtkWidget *widget,
> GtkAllocation *allocation)
> {
> ??
>
> if (allocation->height >= allocation->width * 0.8)
> allocation->height = allocation->width;
> else
> allocation->width = allocation->height/0.8;
>
> widget->allocation = *allocation;
>
> ??
> }
> -------- End of my code -----------------------------
>
> But ,i found ,in my test application,my own widget's size didn't change
> Who can tell my what's wrroy ?
> And who can tell my how to maintain my widget's height, width ratio to a
> constant value ?
>
> Any help would be much appreciated !
>
The GtkAspectFrame widget seems to be what you are looking for. You
can probably use it or at least have a look at its source code. It
looks like you already read it, but just in case there is a chapter
'Creating your own widget' in the Gtk tutorial which explains the size
negotiation process.
Bye,
--
Cédric Lucantis
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