From d6fdd303045ed9e0439005039e3c61f51d065931 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Fri, 06 Aug 2021 16:59:35 -0400
Subject: tk: Add radio key handling

---
(limited to 'src/tk')

diff --git a/src/tk/radio.c b/src/tk/radio.c
index f20b902..d3001c3 100644
--- a/src/tk/radio.c
+++ b/src/tk/radio.c
@@ -35,6 +35,7 @@ struct mftk_radio {
 	struct mftk_widget        *grid;
 	struct _mftk_radio_state  *states;
 	int                        state;
+	int                        options;
 	int                      (*action)(void *, int);
 	void                      *user_data;
 };
@@ -71,11 +72,45 @@ _mftk_radio_layout(struct mftk_widget *w)
 }
 
 static int
-_mftk_radio_key_event(struct mftk_widget *w, SDL_Event *e, int x, int y)
+_mftk_radio_key_event(struct mftk_widget *w, SDL_Event *e)
 {
 	struct mftk_radio *r = (struct mftk_radio *) w;
 
-	/* TODO */
+	switch (e->type) {
+		case SDL_KEYDOWN:
+			switch (e->key.keysym.sym) {
+				case SDLK_UP:
+					mftk_check_set_state(r->children[
+							r->state], SDL_FALSE);
+					--r->state;
+					if (r->state < 0) {
+						r->state = r->options - 1;
+					}
+					mftk_check_set_state(r->children[
+							r->state], SDL_TRUE);
+					if (r->action == NULL) {
+						return 0;
+					}
+					return r->action(r->user_data,r->state);
+				case SDLK_DOWN:
+					mftk_check_set_state(r->children[
+							r->state], SDL_FALSE);
+					++r->state;
+					if (r->state >= r->options) {
+						r->state = 0;
+					}
+					mftk_check_set_state(r->children[
+							r->state], SDL_TRUE);
+					if (r->action == NULL) {
+						return 0;
+					}
+					return r->action(r->user_data,r->state);
+				default:
+					break;
+			}
+		default:
+			break;
+	}
 
 	return 0;
 }
@@ -185,6 +220,7 @@ mftk_radio_new(int butn_width, int butn_padding, SDL_Color *butn_color,
 	}
 
 	r->state     = state;
+	r->options   = options;
 	r->action    = action;
 	r->user_data = user_data;
 
--
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