Re: How to get the widget's size before it has been shown?

[G Hasse <gorhas raditex se>]

On Wed, Sep 03, 2008 at 06:30:25PM +0800, Lazy Fox wrote:
> /* How to get the widget's size before it has been shown?
>  *
>  * There are two "printf" statements below. I want to get the widget's
> size at the first printf.
>  * How to do this?
>  */
> #include <gtk/gtk.h>
>
> int main( int   argc, char *argv[] )
> {
>     GtkWidget *window;
>     gtk_init (&argc, &argv);
>
>     window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
> printf("width=%d \n", window->allocation.width); // return 1
>     gtk_widget_show  (window);
> printf("width=%d \n", window->allocation.width); // return 200
>     gtk_main ();
>     return 0;
> }

You can't do that. Depending on how widgets are packed together
the size must be calculated. That is just what gtk_widget_show
does. You can eaven change packeting in runtime. Then you must
make a new expose, where the size should be recalculated.


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-- 
Göran Hasse

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