From 4693d1d70855b97d57cdbe92552ba304362fb453 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Fri, 06 Aug 2021 09:14:08 -0400
Subject: tk: Implement focusing by mouse

---
diff --git a/src/tk/button.c b/src/tk/button.c
index a236dd4..0b5e874 100644
--- a/src/tk/button.c
+++ b/src/tk/button.c
@@ -51,6 +51,7 @@ _mftk_button_event(struct mftk_widget *w, SDL_Event *e,
 	switch (e->type) {
 		case SDL_MOUSEBUTTONUP:
 			if (e->button.button == SDL_BUTTON_LEFT) {
+				mftk_window_focus(w->window, w);
 				if (b->action == NULL) {
 					return 0;
 				}
diff --git a/src/tk/check.c b/src/tk/check.c
index a2eadd0..fbd3b23 100644
--- a/src/tk/check.c
+++ b/src/tk/check.c
@@ -81,6 +81,7 @@ _mftk_check_event(struct mftk_widget *w, SDL_Event *e,
 	switch (e->type) {
 		case SDL_MOUSEBUTTONUP:
 			if (e->button.button == SDL_BUTTON_LEFT) {
+				mftk_window_focus(w->window, w);
 				c->state = !c->state;
 				if (c->action == NULL) {
 					return 0;
diff --git a/src/tk/radio.c b/src/tk/radio.c
index 11acbae..6f767af 100644
--- a/src/tk/radio.c
+++ b/src/tk/radio.c
@@ -75,6 +75,16 @@ _mftk_radio_event(struct mftk_widget *w, SDL_Event *e, int x, int y)
 {
 	struct mftk_radio *r = (struct mftk_radio *) w;
 
+	switch (e->type) {
+		case SDL_MOUSEBUTTONUP:
+			if (e->button.button == SDL_BUTTON_LEFT) {
+				mftk_window_focus(w->window, w);
+			}
+			break;
+		default:
+			break;
+	}
+
 	return mftk_widget_event(r->grid, e, x, y);
 }
 
diff --git a/src/tk/text.c b/src/tk/text.c
index 052beeb..88b8e37 100644
--- a/src/tk/text.c
+++ b/src/tk/text.c
@@ -55,8 +55,20 @@ _mftk_text_event(struct mftk_widget *w, SDL_Event *e,
 {
 	struct mftk_text *t = (struct mftk_text *) w;
 
-	/* TODO */
-	t->texture = NULL;
+	switch (e->type) {
+		case SDL_KEYDOWN:
+			/* TODO */
+			t->texture = NULL;
+			break;
+		case SDL_MOUSEBUTTONUP:
+			if (e->button.button == SDL_BUTTON_LEFT) {
+				mftk_window_focus(w->window, w);
+			}
+			break;
+		default:
+			break;
+	}
+
 	return 0;
 }
 
diff --git a/src/tk/widget.h b/src/tk/widget.h
index 83abe0b..27400c4 100644
--- a/src/tk/widget.h
+++ b/src/tk/widget.h
@@ -26,6 +26,9 @@
 void
 mftk_window_index(struct mftk_window *win, struct mftk_widget *wid);
 
+void
+mftk_window_focus(struct mftk_window *win, struct mftk_widget *wid);
+
 enum mftk_widget_role {
 	MFTK_WIDGET_ROLE_NONE,
 	MFTK_WIDGET_ROLE_FOCUSABLE,
diff --git a/src/tk/window.c b/src/tk/window.c
index 61c017f..53fbb41 100644
--- a/src/tk/window.c
+++ b/src/tk/window.c
@@ -100,6 +100,14 @@ mftk_window_event(struct mftk_window *w, SDL_Event *e)
 	return 0;
 }
 
+void
+mftk_window_focus(struct mftk_window *win, struct mftk_widget *wid)
+{
+	win->focus->focused = SDL_FALSE;
+	win->focus = wid;
+	win->focus->focused = SDL_TRUE;
+}
+
 int
 mftk_window_render(struct mftk_window *w, SDL_Renderer *renderer)
 {
--
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