From 8473a1dfde3193e989c4d1fd371db99cf5a104c6 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Fri, 06 Aug 2021 18:42:05 -0400
Subject: tk: Add (de)focus methods

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

diff --git a/src/tk/button.c b/src/tk/button.c
index ef7cf6c..90752eb 100644
--- a/src/tk/button.c
+++ b/src/tk/button.c
@@ -41,6 +41,18 @@ _mftk_button_layout(struct mftk_widget *w)
 	w->h = b->label->h + b->padding * 2;
 }
 
+static void
+_mftk_button_focus(struct mftk_widget *w __attribute__((__unused__)))
+{
+	/* Nothing to do */
+}
+
+static void
+_mftk_button_defocus(struct mftk_widget *w __attribute__((__unused__)))
+{
+	/* Nothing to do */
+}
+
 static int
 _mftk_button_key_event(struct mftk_widget *w, SDL_Event *e)
 {
diff --git a/src/tk/check.c b/src/tk/check.c
index fddd7cf..898a21e 100644
--- a/src/tk/check.c
+++ b/src/tk/check.c
@@ -80,6 +80,18 @@ _mftk_check_layout(struct mftk_widget *w)
 	}
 }
 
+static void
+_mftk_check_focus(struct mftk_widget *w __attribute__((__unused__)))
+{
+	/* Nothing to do */
+}
+
+static void
+_mftk_check_defocus(struct mftk_widget *w __attribute__((__unused__)))
+{
+	/* Nothing to do */
+}
+
 static int
 _mftk_check_key_event(struct mftk_widget *w, SDL_Event *e)
 {
diff --git a/src/tk/radio.c b/src/tk/radio.c
index d3001c3..f6fe474 100644
--- a/src/tk/radio.c
+++ b/src/tk/radio.c
@@ -71,6 +71,18 @@ _mftk_radio_layout(struct mftk_widget *w)
 	w->h = r->grid->h;
 }
 
+static void
+_mftk_radio_focus(struct mftk_widget *w __attribute__((__unused__)))
+{
+	/* Nothing to do */
+}
+
+static void
+_mftk_radio_defocus(struct mftk_widget *w __attribute__((__unused__)))
+{
+	/* Nothing to do */
+}
+
 static int
 _mftk_radio_key_event(struct mftk_widget *w, SDL_Event *e)
 {
diff --git a/src/tk/text.c b/src/tk/text.c
index a495cde..dedad4b 100644
--- a/src/tk/text.c
+++ b/src/tk/text.c
@@ -48,6 +48,16 @@ _mftk_text_layout(struct mftk_widget *w __attribute__((__unused__)))
 	/* Size set in constructor */
 }
 
+static void
+_mftk_text_focus(struct mftk_widget *w __attribute__((__unused__)))
+{
+}
+
+static void
+_mftk_text_defocus(struct mftk_widget *w __attribute__((__unused__)))
+{
+}
+
 static int
 _mftk_text_key_event(struct mftk_widget *w, SDL_Event *e)
 {
diff --git a/src/tk/widget.c b/src/tk/widget.c
index 5cd5878..f1d02dc 100644
--- a/src/tk/widget.c
+++ b/src/tk/widget.c
@@ -71,6 +71,18 @@ mftk_widget_index(struct mftk_widget *w, struct mftk_window *win)
 	}
 }
 
+void
+mftk_widget_focus(struct mftk_widget *w)
+{
+	w->focus(w);
+}
+
+void
+mftk_widget_defocus(struct mftk_widget *w)
+{
+	w->defocus(w);
+}
+
 int
 mftk_widget_key_event(struct mftk_widget *w, SDL_Event *e)
 {
diff --git a/src/tk/widget.h b/src/tk/widget.h
index a5634a5..e1826d2 100644
--- a/src/tk/widget.h
+++ b/src/tk/widget.h
@@ -43,6 +43,8 @@ struct mftk_widget {
 	void                  (*layout)(struct mftk_widget *);
 	void                  (*index)(struct mftk_widget *,
 			struct mftk_window *);
+	void                  (*focus)(struct mftk_widget *);
+	void                  (*defocus)(struct mftk_widget *);
 	int                   (*key_event)(struct mftk_widget *, SDL_Event *);
 	int                   (*mouse_event)(struct mftk_widget *, SDL_Event *,
 			int, int);
@@ -79,6 +81,8 @@ mftk_widget_new(size_t size);
 			return NULL; \
 		}; \
 		w->layout      = &_mftk_##name##_layout; \
+		w->focus       = &_mftk_##name##_focus; \
+		w->defocus     = &_mftk_##name##_defocus; \
 		w->key_event   = &_mftk_##name##_key_event; \
 		w->mouse_event = &_mftk_##name##_mouse_event; \
 		w->render      = &_mftk_##name##_render; \
@@ -114,6 +118,12 @@ mftk_widget_layout(struct mftk_widget *w);
 void
 mftk_widget_index(struct mftk_widget *w, struct mftk_window *win);
 
+void
+mftk_widget_focus(struct mftk_widget *w);
+
+void
+mftk_widget_defocus(struct mftk_widget *w);
+
 int
 mftk_widget_mouse_event(struct mftk_widget *w, SDL_Event *e, int x, int y);
 
diff --git a/src/tk/window.c b/src/tk/window.c
index 64040bf..651a37b 100644
--- a/src/tk/window.c
+++ b/src/tk/window.c
@@ -49,6 +49,7 @@ mftk_window_new(struct mftk_widget *root)
 	mftk_widget_index(w->root, w);
 	w->focus = w->first;
 	w->focus->focused = SDL_TRUE;
+	mftk_widget_focus(w->focus);
 
 	return w;
 }
@@ -80,12 +81,14 @@ mftk_window_event(struct mftk_window *w, SDL_Event *e)
 			switch (e->key.keysym.sym) {
 				case SDLK_TAB:
 					w->focus->focused = SDL_FALSE;
+					mftk_widget_defocus(w->focus);
 					if (e->key.keysym.mod & KMOD_SHIFT) {
 						w->focus = w->focus->prev;
 					} else {
 						w->focus = w->focus->next;
 					}
 					w->focus->focused = SDL_TRUE;
+					mftk_widget_focus(w->focus);
 					break;
 				default:
 					return mftk_widget_key_event(w->focus,
@@ -105,8 +108,10 @@ void
 mftk_window_focus(struct mftk_window *win, struct mftk_widget *wid)
 {
 	win->focus->focused = SDL_FALSE;
+	mftk_widget_defocus(win->focus);
 	win->focus = wid;
 	win->focus->focused = SDL_TRUE;
+	mftk_widget_focus(win->focus);
 }
 
 int
--
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