First cut of UI state machine

This patch adds a first skeleton/draft of the UI state machine, with the
altimeter setting logic implemented at a basic level. It also adds a Python
script which uses GDB/MI to simulate/inject UI events on a GDB remote (i.e.
qemu-avr running the sim copy of the firmware).

1 files changed, 16 insertions, 0 deletions

diff --git a/ui.h b/ui.h
index c51c261..3bb14c7 100644
--- a/ui.h
+++ b/ui.h
@@ -2,9 +2,25 @@
 
 #include "data_manager.h"
 
+enum ui_state {
+	UI_STATE_MAIN,
+	UI_STATE_MAIN_WITH_SETTING,
+	UI_STATE_CHOOSE_UNIT_CATEGORY,
+	UI_STATE_CHANGE_UNIT_MODE,
+};
+
+enum ui_input_event {
+	UI_INPUT_EVENT_UP,
+	UI_INPUT_EVENT_DOWN,
+	UI_INPUT_EVENT_PRESS,
+	UI_INPUT_EVENT_HOLD,
+};
+
 struct ui_ctx {
 	struct display *display;
+	enum ui_state state;
 };
 
 void ui_init(struct ui_ctx*, struct display *);
 void ui_update(struct ui_ctx*, struct data_ctx*);
+void ui_input_event(struct ui_ctx*, struct data_ctx *dctx, enum ui_input_event);