Fix width of xtt operator window for an arbitrary number of monitors and resolutions

xtt/lib/xtt/gtk/xtt_op_gtk.cpp

@@ -113,7 +113,7 @@ OpGtk::OpGtk( void *op_parent_ctx,
   text_size(12)
 {
   pwr_tStatus sts;
-  int root_width, root_height;
+  GdkRectangle xtt_monitor_geometry;
   GdkColor black_color;
 
   memset( a_exist, 0, sizeof(a_exist));
@@ -126,7 +126,6 @@ OpGtk::OpGtk( void *op_parent_ctx,
   gdk_color_parse( "Black", &black_color);
   gdk_color_parse( "White", &white_color);
 
-
   toplevel = (GtkWidget *) g_object_new( GTK_TYPE_WINDOW,
                            "default-height", OP_HEIGHT_MIN,
                            "default-width", 1100,
@@ -134,11 +133,9 @@ OpGtk::OpGtk( void *op_parent_ctx,
 
   gtk_window_set_decorated( GTK_WINDOW(toplevel), FALSE);
   CoWowGtk::SetWindowIcon( toplevel);
-  GdkWindow *rootwindow = gtk_widget_get_root_window( toplevel);
-  gdk_drawable_get_size( rootwindow, &root_width, &root_height);
-  if ( root_width / root_height >= 2)
-    // Assume two screens
-    root_width = root_width / 2;
+  GdkScreen *xtt_screen = gtk_widget_get_screen(toplevel);
+  int xtt_monitor = gdk_screen_get_monitor_at_point(xtt_screen, 0, 0);
+  gdk_screen_get_monitor_geometry(xtt_screen, xtt_monitor, &xtt_monitor_geometry);
 
   pwr_tFileName fname;
   dcli_translate_filename( fname, "$pwr_exe/xtt_alarm_active.png");
@@ -668,12 +665,12 @@ OpGtk::OpGtk( void *op_parent_ctx,
     if ( sup_vect.size() > 10) {
       padding1 = 0;
       padding2 = 0;
-      buttonwidth = (root_width - 350) / sup_vect.size();
+      buttonwidth = (xtt_monitor_geometry.width - 350) / sup_vect.size();
     }
     else if ( sup_vect.size() > 6) {
       padding1 = 8;
       padding2 = 5;
-      buttonwidth = (root_width - 350) / sup_vect.size() - 2 * padding2;
+      buttonwidth = (xtt_monitor_geometry.width - 350) / sup_vect.size() - 2 * padding2;
     }
     else {
       padding1 = 8;
@@ -731,7 +728,7 @@ OpGtk::OpGtk( void *op_parent_ctx,
       gtk_box_pack_start( GTK_BOX(status_bar), GTK_WIDGET(node_button), FALSE, FALSE, padding2);
     }
     if ( buttonwidth)
-      gtk_widget_set_size_request( status_bar, root_width - 6, -1);
+      gtk_widget_set_size_request( status_bar, xtt_monitor_geometry.width, -1);
   }
 
   // Main window
@@ -788,7 +785,7 @@ OpGtk::OpGtk( void *op_parent_ctx,
     activate_aalarm_decr( 0, this);
   }
 
-  gtk_window_resize( GTK_WINDOW(toplevel), root_width - 6, OP_HEIGHT_MIN);
+  gtk_window_resize( GTK_WINDOW(toplevel), xtt_monitor_geometry.width, OP_HEIGHT_MIN);
   gtk_window_move( GTK_WINDOW(toplevel), 0, 0);
 
   wow = new CoWowGtk( toplevel);