Re: Custom widget painting with GtkStyle

[Sebastian PajÄk <spconv+m gmail com>]

Cairo drowing works fine.

I saw in gtkstyle.c that gtk_paint_box just sets background and draws
shadow. Now, if I paint shadow directly instead of box (with
gtk_paint_shadow) it works! Strange. I need to read more about these
engines/themes and try gtk_rc_* func as you suggested.

> I can post complete example code tomorrow, if you need it.

Yes, please. Thanks

> > Sebastian
> > 2009/12/19 Artur Galyamov :
> > > Hi, Sebastian!
> > >
> > > static gboolean
> > > expose_event(GtkWidget *widget, GdkEventExpose *event)
> > > {
> > > Â Âstatic GtkStyle *style = NULL;
> > >
> > > Â Âint x = widget->allocation.x;
> > > Â Âint y = widget->allocation.y;
> > > Â Âint width = widget->allocation.width;
> > > Â Âint height = widget->allocation.height;
> > >
> > > Â Âif (!style)
> > > Â Â Â Â// key phrase:
> > > Â Â Â Âstyle = gtk_rc_get_style_by_paths(gtk_settings_get_default(), NULL,
> > > Â Â Â Â Â Â"GtkButton", GTK_TYPE_BUTTON);
> > >
> > > Â Âgtk_style_attach(style, widget->window);
> > >
> > > Â Âgtk_paint_box(style, widget->window,
> > > Â Â Â ÂGTK_STATE_NORMAL,
> > > Â Â Â ÂGTK_SHADOW_OUT, &event->area,
> > > Â Â Â Âwidget, "button",
> > > Â Â Â Âx, y, width, height);
> > >
> > > Â Âgtk_style_detach(style);
> > > Â Âreturn FALSE;
> > > }
> > >
> > > Style engine may or may not heavily depend on widget's class or even
> > > properties, so don't expect exact emulation for all classes on all
> > > engines. I think it is why things are not documented.
> > >
> > > See $SRC/gtk/gtkbutton.c on how to paint button's focus, default, etc
> > > exactly as GtkButton does.
> > >
> > > --
> > > Artur
> > >
> > > 19.12.09, 14:09, "Sebastian PajÄk" :
> > >
> > > > Hi
> > > > I'm trying to create a shape for my custom widget using GtkStyle
> > > > (gtk_paint func. family). For a start I want a shape like a button has
> > > > (shadow + relief). This is my code for expose event:
> > > > static int
> > > > clv_expose(GtkWidget *widget, GdkEventExpose *event) // clv is a
> > > > subclass of GtkConainer
> > > > {
> > > > Â Â int x = widget->allocation.x;
> > > > Â Â int y = widget->allocation.y;
> > > > Â Â int width = widget->allocation.width;
> > > > Â Â int height = widget->allocation.height;
> > > > Â Â gtk_paint_box(widget->style, widget->window,
> > > > Â Â Â Â Â Â Â Â Â GTK_STATE_NORMAL,
> > > > Â Â Â Â Â Â Â Â Â GTK_SHADOW_IN, &event->area,
> > > > Â Â Â Â Â Â Â Â Â widget, "button",
> > > > Â Â Â Â Â Â Â Â Â x+4, y+4, width-8, height-8);
> > > > Â Â std::printf("EXPOSE");
> > > > Â Â return FALSE;
> > > > }
> > > > clv_expose is connected and is called. Unfortunately it doesn't work.
> > > > Only empty, flat window is showing, no shadow like in a button. Do you
> > > > know what can be wrong? Is GtkConainer good for sublassing in this
> > > > situation?
> > > > I cannot find any info on gtk/gdk drawing using google (only cairo).
> > > > Gtk API reference is very poor abou it. Some hints, simple exmples or
> > > > howtos will be helpful for a GTK+ beginner like me :).
> > > > Thanks in advance
> > > > Sebastian
> > > > _______________________________________________
> > > > gtk-app-devel-list mailing list
> > > > gtk-app-devel-list gnome org
> > > > http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
>
> --
> Artur