Re: Clear A Pixmap

[nahuel9728 <nahuelsgk hotmail com>]

Yeti...... THANK U VERY MUCH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Sorry for use the forum for this but...
THANK YOU for YOUR HELP!!!!!!!!!!!!! You're the best....


David NeÄas (Yeti)-2 wrote:
> On Fri, Jun 01, 2007 at 05:38:54PM -0700, nahuel9728 wrote:
> > Thaxs Yeti for the answer but Sorry I'm not able to do it. I explain a
> > little
> > bit what im doing and i would like to do:
> > main(){
> > mem_map=gtk_drawing_area_new();
> > gtk_signal_connect (GTK_OBJECT (mem_map), "expose_event",(GtkSignalFunc)
> > expose_event, NULL);
> > gtk_signal_connect
> > (GTK_OBJECT(mem_map),"configure_event",(GtkSignalFunc)configure_event,
> > NULL);
> > gtk_signal_connect (GTK_OBJECT (mem_map),
> > "button_press_event",(GtkSignalFunc)         button_press_event, NULL);
> > /*A button to erase all the drawed and paint things*/
> > boton = gtk_button_new_with_label ("Clear and paint");
> > gtk_signal_connect_object (GTK_OBJECT (boton), "clicked",GTK_SIGNAL_FUNC
> > (clear_and_paint),GTK_OBJECT (main_window));
> > show....
> > }
> >
> > void expose_event(){
> >         gdk_draw_pixmap
> > }
> >
> > void clear_and_pain(GtkWidget *widget, GdkEventExpose *event){
> >      /*HERE!!!!!!!! I WANNA CLEAN ALL MY DRAWED AREA*/
> >        gtk_widget_queue_draw_area(GTK_WIDGET(mem_map),0,0,910,440);
> >         /*This up should clean all the area??? */
> >      
> >         /*And later draw things.....*/
> >         draw_brush();
> > }
> > Any idea anyone....??? Has done somthing similar????
>
> Sorry, this is a mess, I have no idea what you are doing.
>
> However, you seem to started from the Gtk+ scribble example,
> so here's a patch to scribble-simple.c that adds a Clear
> button:
>
> ===============================================================
> --- scribble-simple.c.orig    2007-05-02 18:27:36.000000000 +0200
> +++ scribble-simple.c 2007-06-02 12:25:02.000000000 +0200
> @@ -115,12 +115,21 @@
>    exit (0);
>  }
>  
> +static void
> +clear(GtkWidget *widget)
> +{
> +    gdk_draw_rectangle(pixmap, widget->style->white_gc, TRUE,
> +                       0, 0,
> +                       widget->allocation.width,
> widget->allocation.height);
> +    gtk_widget_queue_draw(widget);
> +}
> +
>  int main( int   argc, 
>            char *argv[] )
>  {
>    GtkWidget *window;
>    GtkWidget *drawing_area;
> -  GtkWidget *vbox;
> +  GtkWidget *vbox, *hbox;
>  
>    GtkWidget *button;
>  
> @@ -164,16 +173,19 @@
>                        | GDK_POINTER_MOTION_MASK
>                        | GDK_POINTER_MOTION_HINT_MASK);
>  
> -  /* .. And a quit button */
> -  button = gtk_button_new_with_label ("Quit");
> -  gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
> -
> -  g_signal_connect_swapped (G_OBJECT (button), "clicked",
> -                         G_CALLBACK (gtk_widget_destroy),
> -                         G_OBJECT (window));
> -  gtk_widget_show (button);
> +  hbox = gtk_hbox_new(TRUE, 0);
> +  gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
> +
> +  button = gtk_button_new_with_label("Clear");
> +  gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 0);
> +  g_signal_connect_swapped(button, "clicked", G_CALLBACK(clear),
> drawing_area);
> +
> +  button = gtk_button_new_with_label("Quit");
> +  gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 0);
> +  g_signal_connect_swapped(button, "clicked",
> +                           G_CALLBACK(gtk_widget_destroy), window);
>  
> -  gtk_widget_show (window);
> +  gtk_widget_show_all(window);
>  
>    gtk_main ();
>  
> ===============================================================
>
> Yeti
>
> --
> http://gwyddion.net/
> _______________________________________________
> gtk-app-devel-list mailing list
> gtk-app-devel-list gnome org
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