Re: why i can't draw the graphic??

[=?gb2312?b?6Zkg6IM=?= <bdragon2001 hotmail com>]

hi,jamie
    sorry,i have made a mistake.But it is not the important one,even use 

the"GTK_OBJECT(drawing_area)",i just can't seen the graphic.

    Here is the code:

int main(int argc,char *argv[])
{
   GtkWidget *Mainwindow;

   GtkWidget *Vbox,*Hbox,*Drawing_area;

    /*gtk initialization*/
    gtk_init (&argc, &argv);

	/*Mainwindown initiation*/
	Mainwindow=gtk_window_new(GTK_WINDOW_TOPLEVEL);

	gtk_window_set_title(GTK_WINDOW(Mainwindow),"vector map viewer");

	gtk_container_border_width(GTK_CONTAINER(Mainwindow),10);
   /*widget  initiation */
	Vbox=gtk_vbox_new(FALSE,0);

	Drawing_area=gtk_drawing_area_new ();
        gtk_drawing_area_size(Drawing_area,200,200);
		

	/*widget allagement*/
	gtk_container_add(GTK_CONTAINER(Mainwindow),Vbox);

	/*show widgets */
	gtk_widget_show(Vbox);
   gtk_widget_show(Drawing_area);
   gtk_widget_show(Mainwindow);
    
   /*draw the line*/
    gdk_draw_line (Drawing_area->window,
                Drawing_area->style->black_gc,
                100, 50, 50, 100);

   /*loop*/
   gtk_main();

   return (0);
		
}

In it,i can't see the line drawed in the Drawing_area after it's 
executed.Why?

Best regards,



_________________________________________________________________
享用世界上最大的电子邮件系统— MSN Hotmail。http://www.hotmail.com/cn