Re: Writing science application to visualisate physical process. Need help.

["Andrew E. Makeev" <andrew solvo ru>]

Hi

I think, you should to use some kind of CANVAS library that was designed 
exactly for functionality you described.
Library has several implementations in different GUI kits (QT, Tcl/Tk, 
Gnome, etc).
For GTK+ you could find it as libgnomecanvas. Though I never tried that 
package, so, probably, you would to ask how to get and install it.

Regards,
-andrew

Peter Volkov Alexandrovich wrote:

> Good time of day.
>
> I'm student and I need to write application to visualisate quantum mechanical 
> process. So I'd like to write application where I could view some movie in 
> dynamics. I tried to write it using GTK+-2.4.1 library, and now I am a bit 
> frustrated.
>
> What I've done. I've took a scribble-simple program from gtk+ 2.0 tutorial as 
> a base, removed code that handles mouse moving and drawing and then tried to 
> add some code that allows me to move for example rectangle. As the result for 
> now I can't see any moving.
>
> May be I'm very wrong, but my idea is the following. I take a pixmap and then 
> I'll draw next frame on it and make it visible. The sequence of this frames 
> form my movie. Next 3 functions illustrate what I'm actually doing:
> gdk_draw_rectangle (pixmap, widget->style->white_gc,TRUE, update_rect.x_old,
> update_rect.y_old, update_rect.width_old, update_rect.height_old);
> gdk_draw_rectangle (pixmap, widget->style->black_gc,TRUE, update_rect.x_new,
> update_rect.y_new, update_rect.width_new, update_rect.height_new);
> gtk_widget_queue_draw_area (widget, update_rect.x, update_rect.y,
> update_rect.width, update_rect.height);
>
> As the result, my rectangular is in the last position.
>
> I dare to ask because I think I'm thinking in the wrong direction at all. 
> Looking throught library reference I've found another widget: GtkImage, but I 
> don't know how to use it. And confusing usage of gtk and gdk functions. Is 
> this write?
>
> So. What is the right way to make moving picture using gtk+ library?
> Thoughts and ideas, links, listings are very welcome.
>
>