1 files changed, 35 insertions, 2 deletions
diff --git a/src/sdl/action.c b/src/sdl/action.c
index a4dcb79..8307f19 100644
--- a/src/sdl/action.c
+++ b/src/sdl/action.c
@@ -24,8 +24,8 @@ keycode_to_dir(const SDL_Keycode code) {
   }
 }
 
-action_t
-get_action(
+static action_t
+get_key_action(
   const SDL_Keycode code
 ) {
   switch (code) {
@@ -61,3 +61,36 @@ get_action(
     return (action_t) { .type = ACTION_NONE };
   }
 }
+
+static action_t
+get_wheel_action(
+  const Sint32 y
+) {
+  if (y > 0) {
+    return (action_t) { .type = ACTION_ZOOM_IN, .data = y };
+  } else if (y < 0) {
+    return (action_t) { .type = ACTION_ZOOM_OUT, .data = -y };
+  } else {
+    return (action_t) { .type = ACTION_NONE };
+  }
+}
+
+action_t
+get_action(
+  const SDL_Event * const ev
+) {
+  switch (ev->type) {
+  case SDL_QUIT:
+    return (action_t) { .type = ACTION_QUIT };
+    break;
+  case SDL_KEYUP:
+    return get_key_action(ev->key.keysym.sym);
+    break;
+  case SDL_MOUSEWHEEL:
+    return get_wheel_action(ev->wheel.y);
+    break;
+  default:
+    // ignore event
+    return (action_t) { .type = ACTION_NONE };
+  }
+}