RE: The Window expose-event with gtk_window_resize() problem:

["Tom Liu" <tom liu flextrade com>]

Hi, 
I post the question week ago, still can't find the answer.
Can some one take a look and help me out this problem? I need this to be
done.
Thanks.
Tom.

> -----Original Message-----
> From: Tom Liu [mailto:tom liu flextrade com]
> Sent: Tuesday, July 06, 2004 11:55 AM
> To: 'Owen Taylor'; 'Jan-Marek Glogowski'
> Cc: 'gtk-app-devel-list gnome org'
> Subject: RE: The Window expose-event with gtk_window_resize() problem:
>
> Set_double_buffered will bring another problem. If I put an label in
the
> window, when other windows covers this window and move away, the label
> will disappear!
>
> Please try the following code.
//----------------------------------------------------------------------
--
> --
> #include "gtk/gtk.h"
> #include "stdio.h"
>
> static gboolean expose(GtkWidget * widget, GdkEvent *event, gpointer
data)
> {
>       int x,y,w,h;
>       x=y=0;
>       w=widget->allocation.width;
>       h=widget->allocation.height;
fprintf(stderr,"Debug:%s,%d:expose:wid:%d,hi:%d,\n",__FILE__,__LINE_
> _,w,h);
>
>       gdk_window_clear(widget->window);// clear all this window;
>       gdk_draw_rectangle(widget->window,(widget->style-
> > black_gc),false,5,5,w-10,h-10);
>       return FALSE;
> }
> static gboolean press(GtkWidget * widget, GdkEvent *event, gpointer
data)
> {
>       gtk_window_resize(GTK_WINDOW(widget),widget-
> > allocation.width+20,widget->allocation.height+20);
> //
gdk_window_resize(widget->window,widget->allocation.width+20,widget-
> > allocation.height+20);
>       return FALSE;
> }
>
> int main( int   argc, char *argv[] )
> {
>       GtkWidget *window;
>       GtkWidget *lbl;
>       gtk_init (&argc, &argv);
>       window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
>       gtk_widget_set_app_paintable(window, TRUE);
>       gtk_widget_set_double_buffered (window,false);
>       gtk_widget_set_events(window,GDK_BUTTON_PRESS_MASK|
>       GDK_EXPOSURE_MASK);
>     g_signal_connect (G_OBJECT (window), "delete_event", G_CALLBACK
> (gtk_main_quit), NULL);
>       g_signal_connect(G_OBJECT(window),"expose-
> event",G_CALLBACK(expose),NULL);
>       g_signal_connect(G_OBJECT(window), "button_press_event",
> G_CALLBACK(press), NULL);
>       gtk_container_set_border_width(GTK_CONTAINER(window),40);
>       lbl=gtk_label_new("this is a label");
>       gtk_widget_set_double_buffered (lbl,false);
>       gtk_container_add(GTK_CONTAINER(window),lbl);
>
>
>       gtk_widget_show_all(window);
>       gtk_main ();
>       return 0;
>
> }
//----------------------------------------------------------------------
--
> Thanks.
> Tom.
>
>
>
>
> > -----Original Message-----
> > From: Owen Taylor [mailto:otaylor redhat com]
> > Sent: Friday, July 02, 2004 3:25 PM
> > To: Jan-Marek Glogowski
> > Cc: Tom Liu; gtk-app-devel-list gnome org
> > Subject: RE: The Window expose-event with gtk_window_resize()
problem:
> > On Sat, 2004-07-03 at 01:04, Jan-Marek Glogowski wrote:
> > > Hi
> > >
> > > I think there might be a problem in the "double buffering" code.
If
> you
> > > set
> > >
> > > gtk_widget_set_double_buffered( window, FALSE );
> > >
> > > you get single exposures.
> >
> > What's a single exposure?
> >
> > set_double_buffered (widget, FALSE) makes that widget *not*
> > double buffered. widgets are double buffered by default.
> >
> >                                             Owen