From 6a45a31b8b7e1a88dc5b6354f12ad40ea43e7dd3 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Fri, 06 Aug 2021 20:04:00 -0400
Subject: tk: Add text widget event callback

---
diff --git a/src/splash.c b/src/splash.c
index 3c743a3..5c9adb7 100644
--- a/src/splash.c
+++ b/src/splash.c
@@ -32,6 +32,14 @@
 #include "util.h"
 
 static int
+_mf_splash_seed(void *user_data, const char *seed)
+{
+	SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Seed: %ld", atol(seed));
+
+	return 0;
+}
+
+static int
 _mf_splash_size(void *user_data, int state)
 {
 	switch (state) {
@@ -116,7 +124,7 @@ _mf_splash_form(SDL_Renderer *renderer, TTF_Font *text_font,
 			mftk_label_new(text_font, "Seed", text_color, renderer),
 				MFTK_GRID_HALIGN_R|MFTK_GRID_VALIGN_T,
 			mftk_text_new('0', '9', rand_max_len, seed, text_font,
-				text_color),
+				text_color, _mf_splash_seed, NULL),
 				MFTK_GRID_HALIGN_L|MFTK_GRID_VALIGN_T,
 			mftk_label_new(text_font, "Size", text_color, renderer),
 				MFTK_GRID_HALIGN_R|MFTK_GRID_VALIGN_T,
diff --git a/src/tk.h b/src/tk.h
index c7c5a51..28533e9 100644
--- a/src/tk.h
+++ b/src/tk.h
@@ -76,7 +76,8 @@ mftk_radio_new(int butn_width, int butn_padding, SDL_Color *butn_color,
 
 struct mftk_widget *
 mftk_text_new(char min_char, char max_char, int len, const char *val,
-		TTF_Font *font, SDL_Color *color);
+		TTF_Font *font, SDL_Color *color,
+		int (*action)(void *, const char *), void *user_data);
 
 struct mftk_widget *
 mftk_blank_new(void);
diff --git a/src/tk/text.c b/src/tk/text.c
index c624678..6a89b44 100644
--- a/src/tk/text.c
+++ b/src/tk/text.c
@@ -26,21 +26,23 @@
 #include "widget.h"
 
 struct mftk_text {
-	struct mftk_widget  parent;
-	char                min_char;
-	char                max_char;
-	int                 len;
-	int                 cur;
-	int                 y;
-	int                 w;
-	int                 h;
-	char               *val;
-	char               *curval;
-	TTF_Font           *font;
-	int                 line_skip;
-	int                 ascent;
-	SDL_Color          *color;
-	SDL_Texture        *texture;
+	struct mftk_widget   parent;
+	char                 min_char;
+	char                 max_char;
+	int                  len;
+	int                  cur;
+	int                  y;
+	int                  w;
+	int                  h;
+	char                *val;
+	char                *curval;
+	TTF_Font            *font;
+	int                  line_skip;
+	int                  ascent;
+	SDL_Color           *color;
+	SDL_Texture         *texture;
+	int                (*action)(void *, const char *);
+	void                *user_data;
 };
 
 static void
@@ -103,7 +105,10 @@ _mftk_text_key_event(struct mftk_widget *w, SDL_Event *e)
 					}
 					SDL_DestroyTexture(t->texture);
 					t->texture = NULL;
-					break;
+					if (t->action == NULL) {
+						return 0;
+					}
+					return t->action(t->user_data, t->val);
 				case SDLK_DELETE:
 					len = strlen(t->val);
 					if (t->cur >= len) {
@@ -114,7 +119,10 @@ _mftk_text_key_event(struct mftk_widget *w, SDL_Event *e)
 					}
 					SDL_DestroyTexture(t->texture);
 					t->texture = NULL;
-					break;
+					if (t->action == NULL) {
+						return 0;
+					}
+					return t->action(t->user_data, t->val);
 				default:
 					break;
 			}
@@ -139,7 +147,10 @@ _mftk_text_key_event(struct mftk_widget *w, SDL_Event *e)
 			t->cur += i;
 			SDL_DestroyTexture(t->texture);
 			t->texture = NULL;
-			break;
+			if (t->action == NULL) {
+				return 0;
+			}
+			return t->action(t->user_data, t->val);
 		default:
 			break;
 	}
@@ -272,7 +283,8 @@ _mftk_text_destroy(struct mftk_widget *w)
 
 struct mftk_widget *
 mftk_text_new(char min_char, char max_char, int len, const char *val,
-		TTF_Font *font, SDL_Color *color)
+		TTF_Font *font, SDL_Color *color,
+		int (*action)(void *, const char *), void *user_data)
 {
 	struct mftk_widget *w;
 	struct mftk_text   *t;
@@ -290,6 +302,8 @@ mftk_text_new(char min_char, char max_char, int len, const char *val,
 	t->ascent    = TTF_FontAscent  (font);
 	t->color     = color;
 	t->texture   = NULL;
+	t->action    = action;
+	t->user_data = user_data;
 
 	t->val = calloc(len + 1, sizeof(*t->val));
 	if (t->val == NULL) {
--
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