refactor:core:Software keyboard infrastructure tuning

- Use enum for keyboard modes, 0 - no kbd, 1 - gui internal keyboard,
  2 - try system keyboard, use internal if system is unavailable

- Pass graphics object pointer to keyboard graphic module primitives to
  conform practice for similar methods.

1 files changed, 8 insertions, 0 deletions

diff --git a/navit/gui.h b/navit/gui.h
index 5bb936938..38307901e 100644
--- a/navit/gui.h
+++ b/navit/gui.h
@@ -45,6 +45,14 @@ struct gui_methods {
 	int (*set_attr)(struct gui_priv *priv, struct attr *attr);
 };
 
+/*
+ *  Values for attr_keyboard when set on gui object
+ */
+enum gui_keyboard_types {
+	gui_keyboard_no=0,
+	gui_keyboard_own=1,
+	gui_keyboard_system_or_own=2
+};
 
 /* prototypes */
 enum attr_type;