[gnome-games] retro-gamepad: Use Retro.JoypadId.to_button_code()

[Adrien Plazas <aplazas src gnome org>]

commit 58041f012000b1f28f9cfbcc755a40562eb36009
Author: theawless <theawless gmail com>
Date:   Fri Jul 27 00:22:33 2018 +0530

    retro-gamepad: Use Retro.JoypadId.to_button_code()
    
    This is more concise and prevents redundancy.

 src/retro/retro-gamepad.vala | 39 +++------------------------------------
 1 file changed, 3 insertions(+), 36 deletions(-)
---
diff --git a/src/retro/retro-gamepad.vala b/src/retro/retro-gamepad.vala
index 90fa2b6d..ebd452ae 100644
--- a/src/retro/retro-gamepad.vala
+++ b/src/retro/retro-gamepad.vala
@@ -68,42 +68,9 @@ private class Games.RetroGamepad: Object, Retro.Controller {
        }
 
        private bool get_button_pressed (Retro.JoypadId button) {
-               switch (button) {
-               case Retro.JoypadId.B:
-                       return buttons[EventCode.BTN_A];
-               case Retro.JoypadId.Y:
-                       return buttons[EventCode.BTN_Y];
-               case Retro.JoypadId.SELECT:
-                       return buttons[EventCode.BTN_SELECT];
-               case Retro.JoypadId.START:
-                       return buttons[EventCode.BTN_START];
-               case Retro.JoypadId.UP:
-                       return buttons[EventCode.BTN_DPAD_UP];
-               case Retro.JoypadId.DOWN:
-                       return buttons[EventCode.BTN_DPAD_DOWN];
-               case Retro.JoypadId.LEFT:
-                       return buttons[EventCode.BTN_DPAD_LEFT];
-               case Retro.JoypadId.RIGHT:
-                       return buttons[EventCode.BTN_DPAD_RIGHT];
-               case Retro.JoypadId.A:
-                       return buttons[EventCode.BTN_B];
-               case Retro.JoypadId.X:
-                       return buttons[EventCode.BTN_X];
-               case Retro.JoypadId.L:
-                       return buttons[EventCode.BTN_TL];
-               case Retro.JoypadId.R:
-                       return buttons[EventCode.BTN_TR];
-               case Retro.JoypadId.L2:
-                       return buttons[EventCode.BTN_TL2];
-               case Retro.JoypadId.R2:
-                       return buttons[EventCode.BTN_TR2];
-               case Retro.JoypadId.L3:
-                       return buttons[EventCode.BTN_THUMBL];
-               case Retro.JoypadId.R3:
-                       return buttons[EventCode.BTN_THUMBR];
-               default:
-                       return false;
-               }
+               var button_code = button.to_button_code ();
+
+               return button_code != EventCode.EV_MAX && buttons[button_code];
        }
 
        private int16 get_analog_value (Retro.AnalogIndex index, Retro.AnalogId id) {