Introduces menu option descriptions

.vimrc

@@ -1,6 +1,6 @@
 nnoremap <F1> :Make<cr>
 nnoremap <F2> :Make lint test<cr>
-nnoremap <F3> :Termdebug LD_LIBRARY_PATH=$LD_LIBRARY_PATH:./ _build/debug/breakhack<cr>
+nnoremap <F3> :Termdebug _build/debug/breakhack<cr>
 nnoremap <F4> :ter ++close env LD_LIBRARY_PATH=$LD_LIBRARY_PATH:./ ./_build/debug/breakhack<cr>
 
 packadd termdebug

src/main.c

@@ -384,7 +384,7 @@ static void
 goToCharacterMenu(void *unused)
 {
 	UNUSED(unused);
-	charSelectMenu = menu_create_character_selector(on_character_select);
+	charSelectMenu = menu_create_character_selector(on_character_select, gCamera);
 	gGameState = CHARACTER_MENU;
 }
 
@@ -415,10 +415,10 @@ static void
 initInGameMenu(void)
 {
 	static TEXT_MENU_ITEM menu_items[] = {
-		{ "RESUME", toggleInGameMenu },
-		{ "HOW TO PLAY", showHowToTooltip },
-		{ "MAIN MENU", goToMainMenu },
-		{ "QUIT", exitGame },
+		{ "RESUME", "", toggleInGameMenu },
+		{ "HOW TO PLAY", "", showHowToTooltip },
+		{ "MAIN MENU", "", goToMainMenu },
+		{ "QUIT", "Exit game", exitGame },
 	};
 
 	menu_create_text_menu(&inGameMenu, &menu_items[0], 4, gRenderer);
@@ -428,9 +428,10 @@ static void
 createInGameGameOverMenu(void)
 {
 	static TEXT_MENU_ITEM menu_items[] = {
-		{ "NEW GAME", goToCharacterMenu },
-		{ "MAIN MENU", goToMainMenu },
-		{ "QUIT", exitGame },
+		{ "NEW GAME", "Start a new game",
+			goToCharacterMenu },
+		{ "MAIN MENU", "", goToMainMenu },
+		{ "QUIT", "Exit game", exitGame },
 	};
 
 	if (inGameMenu) {
@@ -458,10 +459,10 @@ static void
 initMainMenu(void)
 {
 	static TEXT_MENU_ITEM menu_items[] = {
-		{ "PLAY", goToCharacterMenu },
-		{ "SCORES", viewScoreScreen },
-		{ "CREDITS", viewCredits },
-		{ "QUIT", exitGame },
+		{ "PLAY", "Play a standard 20 level game", goToCharacterMenu },
+		{ "SCORES", "View your top 10 scores", viewScoreScreen },
+		{ "CREDITS", "View game credits", viewCredits },
+		{ "QUIT", "Exit game", exitGame },
 	};
 
 	if (gMap)
@@ -780,7 +781,7 @@ run_game_update(void)
 	static UpdateData updateData;
 
 	if (gGameState == IN_GAME_MENU)
-		menu_update(inGameMenu, &input);
+		menu_update(inGameMenu, &input, gCamera);
 
 	populateUpdateData(&updateData, deltaTime);
 
@@ -988,9 +989,9 @@ run_menu(void)
 		return;
 
 	if (gGameState == MENU)
-		menu_update(mainMenu, &input);
+		menu_update(mainMenu, &input, gCamera);
 	else if (gGameState == CHARACTER_MENU)
-		menu_update(charSelectMenu, &input);
+		menu_update(charSelectMenu, &input, gCamera);
 
 	SDL_SetRenderDrawColor(gRenderer, 0, 0, 0, 0);
 	SDL_RenderClear(gRenderer);

src/menu.c

@@ -38,12 +38,25 @@ typedef struct MenuItem {
 	GuiButton *button;
 } MenuItem;
 
+static void redraw_description(Menu *m, Camera *cam);
+
 Menu *
 menu_create(void)
 {
 	Menu *menu = ec_malloc(sizeof(Menu));
 	menu->items = linkedlist_create();
+	menu->descriptions = linkedlist_create();
 	menu->selected = 0;
+	menu->menuDescription = sprite_create();
+	sprite_load_text_texture(menu->menuDescription,
+				 "GUI/SDS_8x8.ttf",
+				 0,
+				 12,
+				 1);
+	menu->menuDescription->fixed = true;
+	menu->menuDescription->pos = POS(20, SCREEN_HEIGHT - 20);
+	menu->menuDescription->hidden = true;
+
 	return menu;
 }
 
@@ -80,11 +93,12 @@ menu_create_text_menu(Menu **menu, TEXT_MENU_ITEM *menu_items, unsigned int size
 		s2->fixed = true;
 
 		menu_item_add(*menu, s1, s2, menu_items[i].callback);
+		linkedlist_append(&(*menu)->descriptions, (void*) menu_items[i].description);
 	}
 }
 
 Menu *
-menu_create_character_selector(void (*onCharacterSelect)(const char *))
+menu_create_character_selector(void (*onCharacterSelect)(const char *), Camera *cam)
 {
 	const char *spriteSheets[] = {
 		"Commissions/Warrior.png",
@@ -96,6 +110,11 @@ menu_create_character_selector(void (*onCharacterSelect)(const char *))
 		"rogue"
 	};
 
+	static char *descriptions[] = {
+		"Play as the warrior",
+		"Play as the rogue",
+	};
+
 	Menu *menu = menu_create();
 	int xoffset = 224;
 	for (size_t i = 0; i < 2; ++i) {
@@ -117,8 +136,13 @@ menu_create_character_selector(void (*onCharacterSelect)(const char *))
 		MenuItem *item = linkedlist_get(&menu->items, (Uint32) i);
 		item->button->usrdata = callbackData[i];
 		xoffset += 224;
+
+		linkedlist_append(&menu->descriptions, descriptions[i]);
 	}
 
+	menu->selected = 0;
+	redraw_description(menu, cam);
+
 	return menu;
 }
 
@@ -178,9 +202,31 @@ handle_mouse_motion(Menu *m, Input *input)
 
 }
 
-void
-menu_update(Menu *m, Input *input)
+static void
+redraw_description(Menu *m, Camera *cam)
 {
+	char *description = linkedlist_get(&m->descriptions, m->selected);
+	if (!description || strlen(description) <= 1) {
+		m->menuDescription->hidden = true;
+		return;
+	}
+
+	m->menuDescription->hidden = false;
+	texture_load_from_text(m->menuDescription->textures[0],
+			       description,
+			       C_WHITE,
+			       C_BLACK,
+			       cam->renderer);
+	m->menuDescription->dim = DIM(
+		m->menuDescription->textures[0]->dim.width,
+		m->menuDescription->textures[0]->dim.height);
+}
+
+void
+menu_update(Menu *m, Input *input, Camera *cam)
+{
+	static int lastSelected = -1;
+
 	if (handle_keyboard_input(m, input)) {
 		return;
 	}
@@ -199,6 +245,11 @@ menu_update(Menu *m, Input *input)
 			return;
 		}
 	}
+
+	if (lastSelected != m->selected) {
+		lastSelected = m->selected;
+		redraw_description(m, cam);
+	}
 }
 
 void
@@ -236,6 +287,8 @@ menu_render(Menu *m, Camera *cam)
 		index++;
 	}
 
+	sprite_render(m->menuDescription, cam);
+
 }
 
 static void
@@ -255,6 +308,10 @@ menu_destroy(Menu *m)
 	while (m->items)
 		menu_item_destroy(linkedlist_pop(&m->items));
 
+	while (m->descriptions)
+		linkedlist_pop(&m->descriptions);
+
+	sprite_destroy(m->menuDescription);
 	free(m);
 }
 

src/menu.h

@@ -27,11 +27,14 @@
 
 typedef struct TEXT_MENU_ITEM {
 	char label[20];
+	char description[100];
 	void (*callback)(void*);
 } TEXT_MENU_ITEM;
 
 typedef struct Menu_t {
 	LinkedList *items;
+	LinkedList *descriptions;
+	Sprite *menuDescription;
 	int selected;
 } Menu;
 
@@ -42,10 +45,10 @@ void
 menu_create_text_menu(Menu **menu, TEXT_MENU_ITEM *menu_items, unsigned int size, SDL_Renderer *);
 
 Menu *
-menu_create_character_selector(void (*onCharacterSelect)(const char *));
+menu_create_character_selector(void (*onCharacterSelect)(const char *), Camera *cam);
 
 void
-menu_update(Menu*, Input*);
+menu_update(Menu*, Input*, Camera *cam);
 
 void
 menu_item_add(Menu*, Sprite*, Sprite*, void (*)(void*));