Started work on menus

1 files changed, 108 insertions, 0 deletions

diff --git a/src/menu.c b/src/menu.c
new file mode 100644
index 0000000..2bbc4df
--- /dev/null
+++ b/src/menu.c
@@ -0,0 +1,108 @@
+#include "app.h"
+#include "font.h"
+
+#define MENU_ITEM_TOP_YPOS_RELATIVE 0.3
+#define MENU_ITEM_YOFFSET_RELATIVE 0.03
+#define UNSELECTED_ITEM_SCALE 1
+#define SELECTED_ITEM_SCALE 1.2
+
+typedef enum {
+  timed_mode_option = 0,
+  exit_option
+} menu_option;
+
+menu_option selected_option;
+sprite_font text_font;
+
+extern SDL_Window* window;
+extern application_state app_state;
+
+static inline float get_window_relative_xpos(float vp) {
+  int width;
+  SDL_GetWindowSizeInPixels(window, &width, NULL);
+
+  return width * vp;
+}
+
+static inline float get_window_relative_ypos(float vp) {
+  int height;
+  SDL_GetWindowSizeInPixels(window, NULL, &height);
+
+  return height * vp;
+}
+
+void init_menu(SDL_Renderer* renderer) {
+  if (text_font.spritesheet == NULL) {
+    load_sprite_font(renderer,
+                     "assets/Fonts/Peaberry-Font-v2.0/Peaberry Bitmap Fonts/1. WhitePeaberry/2. White Peaberry/WhitePeaberry.txt",
+                     &text_font);
+  }
+
+  selected_option = timed_mode_option;
+}
+
+void draw_menu(SDL_Renderer* renderer) {
+  SDL_RenderClear(renderer);
+
+  const char* labels[] = {
+    "Timed Mode",
+    "Exit",
+  };
+
+  float yp = MENU_ITEM_TOP_YPOS_RELATIVE;
+  for (menu_option i = timed_mode_option; i <= exit_option; i++) {
+    float scale = i == selected_option ? SELECTED_ITEM_SCALE : UNSELECTED_ITEM_SCALE;
+
+    draw_text_with_spritefont_extended(renderer,
+                                       &text_font,
+                                       (unsigned char*)labels[i],
+                                       get_window_relative_xpos(0.5),
+                                       get_window_relative_ypos(yp),
+                                       scale
+                                      );
+    yp += MENU_ITEM_YOFFSET_RELATIVE;
+  }
+
+  SDL_RenderPresent(renderer);
+}
+
+static inline void select_next_option() {
+  selected_option = SDL_min(selected_option+1, exit_option);
+}
+
+static inline void select_previous_option() {
+  if (selected_option > timed_mode_option) {
+    selected_option--;
+  }
+}
+
+SDL_AppResult menu_execute_action() {
+  if (selected_option == exit_option) {
+    return SDL_APP_SUCCESS;
+  } if (selected_option == timed_mode_option) {
+    init_timed_game(NULL, NULL, 40);
+    app_state = game_state;
+  }
+
+  return SDL_APP_CONTINUE;
+}
+
+SDL_AppResult menu_event(SDL_Event* e) {
+  if (e->type == SDL_EVENT_KEY_DOWN) {
+    SDL_Scancode pressed_button = e->key.scancode;
+
+    if (pressed_button == SDL_SCANCODE_RETURN) {
+      return menu_execute_action();
+    } else if (pressed_button == SDL_SCANCODE_DOWN) {
+      select_next_option();
+    } else if (pressed_button == SDL_SCANCODE_UP) {
+      select_previous_option();
+    }
+  }
+
+  return SDL_APP_CONTINUE;
+}
+
+void free_menu() {
+  free_sprite_font(&text_font);
+}