libgimpwidgets: add gtk_label_set,get_x,yalign() to gimp3migration.[ch]

They are deprecated in GTK+ 3.x and cause tons of warnings, now we can
port calls to gtk_misc_set_alignment(label) to the new API and have
the same code in master and gtk3-port.

libgimpwidgets/gimp3migration.c

@@ -214,3 +214,49 @@ gdk_screen_get_monitor_workarea (GdkScreen    *screen,
 {
   gdk_screen_get_monitor_geometry (screen, monitor_num, dest);
 }
+
+void
+gtk_label_set_xalign (GtkLabel *label,
+                      gfloat    xalign)
+{
+  g_return_if_fail (GTK_IS_LABEL (label));
+
+  xalign = CLAMP (xalign, 0.0, 1.0);
+
+  g_object_set (label, "xalign", xalign, NULL);
+}
+
+gfloat
+gtk_label_get_xalign (GtkLabel *label)
+{
+  gfloat xalign;
+
+  g_return_val_if_fail (GTK_IS_LABEL (label), 0.5);
+
+  g_object_get (label, "xalign", &xalign, NULL);
+
+  return xalign;
+}
+
+void
+gtk_label_set_yalign (GtkLabel *label,
+                      gfloat    yalign)
+{
+  g_return_if_fail (GTK_IS_LABEL (label));
+
+  yalign = CLAMP (yalign, 0.0, 1.0);
+
+  g_object_set (label, "yalign", yalign, NULL);
+}
+
+gfloat
+gtk_label_get_yalign (GtkLabel *label)
+{
+  gfloat yalign;
+
+  g_return_val_if_fail (GTK_IS_LABEL (label), 0.5);
+
+  g_object_get (label, "yalign", &yalign, NULL);
+
+  return yalign;
+}

libgimpwidgets/gimp3migration.h

@@ -44,13 +44,6 @@ GtkWidget * gtk_scrollbar_new  (GtkOrientation  orientation,
 GtkWidget * gtk_separator_new  (GtkOrientation  orientation);
 
 
-/* These functions are even more evil. They exist only since GTK+ 3.3
- * and need to be taken care of carefully when building against GTK+
- * 3.x. This is not an issue as long as we don't have any GIMP 3.x
- * release, and this file will be gone until then.
- */
-
-#if ! GTK_CHECK_VERSION (3, 3, 0)
 typedef enum
 {
   GDK_MODIFIER_INTENT_PRIMARY_ACCELERATOR,
@@ -65,7 +58,6 @@ GdkModifierType gdk_keymap_get_modifier_mask    (GdkKeymap         *keymap,
                                                  GdkModifierIntent  intent);
 GdkModifierType gtk_widget_get_modifier_mask    (GtkWidget         *widget,
                                                  GdkModifierIntent  intent);
-#endif
 
 gboolean        gdk_cairo_get_clip_rectangle    (cairo_t           *cr,
                                                  GdkRectangle      *rect);
@@ -73,5 +65,13 @@ void            gdk_screen_get_monitor_workarea (GdkScreen         *screen,
                                                  gint               monitor_num,
                                                  GdkRectangle      *dest);
 
+void            gtk_label_set_xalign            (GtkLabel          *label,
+                                                 gfloat             xalign);
+gfloat          gtk_label_get_xalign            (GtkLabel          *label);
+
+void            gtk_label_set_yalign            (GtkLabel          *label,
+                                                 gfloat             yalign);
+gfloat          gtk_label_get_yalign            (GtkLabel          *label);
+
 
 #endif /* __GIMP_3_MIGRATION_H__ */

libgimpwidgets/gimpwidgets.def

@@ -435,6 +435,10 @@ EXPORTS
 	gimp_zoom_type_get_type
 	gtk_box_new
 	gtk_button_box_new
+	gtk_label_get_xalign
+	gtk_label_get_yalign
+	gtk_label_set_xalign
+	gtk_label_set_yalign
 	gtk_paned_new
 	gtk_scale_new
 	gtk_scrollbar_new