Rename "convert.h" to "event_converter.h"

The filename gave no hint about what was converted.

app/src/event_converter.h

@@ -0,0 +1,41 @@
+#ifndef CONVERT_H
+#define CONVERT_H
+
+#include <stdbool.h>
+#include <SDL2/SDL_events.h>
+
+#include "control_msg.h"
+
+struct complete_mouse_motion_event {
+    SDL_MouseMotionEvent *mouse_motion_event;
+    struct size screen_size;
+};
+
+struct complete_mouse_wheel_event {
+    SDL_MouseWheelEvent *mouse_wheel_event;
+    struct point position;
+};
+
+bool
+input_key_from_sdl_to_android(const SDL_KeyboardEvent *from,
+                              struct control_msg *to);
+
+bool
+mouse_button_from_sdl_to_android(const SDL_MouseButtonEvent *from,
+                                 struct size screen_size,
+                                 struct control_msg *to);
+
+// the video size may be different from the real device size, so we need the
+// size to which the absolute position apply, to scale it accordingly
+bool
+mouse_motion_from_sdl_to_android(const SDL_MouseMotionEvent *from,
+                                 struct size screen_size,
+                                 struct control_msg *to);
+
+// on Android, a scroll event requires the current mouse position
+bool
+mouse_wheel_from_sdl_to_android(const SDL_MouseWheelEvent *from,
+                                struct position position,
+                                struct control_msg *to);
+
+#endif