From 331420a4c787f21864abb836fe2d6bcbc6bda816 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Fri, 06 Aug 2021 08:45:44 -0400
Subject: tk: Implement focus switching

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

diff --git a/src/tk/text.c b/src/tk/text.c
index 6bac6e7..052beeb 100644
--- a/src/tk/text.c
+++ b/src/tk/text.c
@@ -139,8 +139,6 @@ _mftk_text_render(struct mftk_widget *w, SDL_Renderer *renderer, int x, int y)
 				t->color->r, t->color->g,
 				t->color->b, t->color->a) < 0 ||
 			SDL_RenderDrawLine(renderer,
-				x + cur_x, y + t->y, x + cur_x, y + t->h) < 0 ||
-			SDL_RenderDrawLine(renderer,
 				x, y + w->h, x + w->w, y + w->h) < 0) {
 		SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
 				"Couldn't render widget: %s",
@@ -148,6 +146,14 @@ _mftk_text_render(struct mftk_widget *w, SDL_Renderer *renderer, int x, int y)
 		free(val);
 		return -1;
 	}
+	if (w->focused == SDL_TRUE && SDL_RenderDrawLine(renderer,
+				x + cur_x, y + t->y, x + cur_x, y + t->h) < 0) {
+		SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
+				"Couldn't render widget: %s",
+				SDL_GetError());
+		free(val);
+		return -1;
+	}
 
 	free(val);
 	return 0;
diff --git a/src/tk/window.c b/src/tk/window.c
index b87e7c0..61c017f 100644
--- a/src/tk/window.c
+++ b/src/tk/window.c
@@ -48,6 +48,7 @@ mftk_window_new(struct mftk_widget *root)
 	mftk_widget_layout(w->root);
 	mftk_widget_index(w->root, w);
 	w->focus = w->first;
+	w->focus->focused = SDL_TRUE;
 
 	return w;
 }
@@ -74,7 +75,29 @@ mftk_window_index(struct mftk_window *win, struct mftk_widget *wid)
 int
 mftk_window_event(struct mftk_window *w, SDL_Event *e)
 {
-	return mftk_widget_event(w->root, e, 0, 0);
+	switch (e->type) {
+		case SDL_KEYDOWN:
+			switch (e->key.keysym.sym) {
+				case SDLK_TAB:
+					w->focus->focused = SDL_FALSE;
+					if (e->key.keysym.mod & KMOD_SHIFT) {
+						w->focus = w->focus->prev;
+					} else {
+						w->focus = w->focus->next;
+					}
+					w->focus->focused = SDL_TRUE;
+					break;
+				default:
+					break;
+			}
+			break;
+		case SDL_MOUSEBUTTONUP:
+			return mftk_widget_event(w->root, e, 0, 0);
+		default:
+			break;
+	}
+
+	return 0;
 }
 
 int
--
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