[gnome-games] gamepad: Add StandardGamepadAxis

[Adrien Plazas <aplazas src gnome org>]

commit fad9c1e74514ac50d630b40a6b9034225f11de1b
Author: Megh Parikh <meghprkh gmail com>
Date:   Mon Jul 18 21:54:34 2016 +0530

    gamepad: Add StandardGamepadAxis
    
    This is an enum representing the axes of a standard gamepad.
    
    This is part of a series of commits to add gamepad support.

 src/Makefile.am                        |    1 +
 src/gamepad/standard-gamepad-axis.vala |   33 ++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 3393eb3..0c3f331 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -60,6 +60,7 @@ gnome_games_SOURCES = \
        gamepad/linux/linux-raw-gamepad-monitor.vala \
        gamepad/raw-gamepad.vala \
        gamepad/raw-gamepad-monitor.vala \
+       gamepad/standard-gamepad-axis.vala \
        \
        grilo/grilo-cover.vala \
        grilo/grilo-media.vala \
diff --git a/src/gamepad/standard-gamepad-axis.vala b/src/gamepad/standard-gamepad-axis.vala
new file mode 100644
index 0000000..630d544
--- /dev/null
+++ b/src/gamepad/standard-gamepad-axis.vala
@@ -0,0 +1,33 @@
+// This file is part of GNOME Games. License: GPLv3
+
+private enum Games.StandardGamepadAxis {
+       UNKNOWN,
+
+       /**
+        * The horizontal axis of the left stick.
+        *
+        * Negative is left, positive is right.
+        */
+       LEFT_X,
+
+       /**
+        * The vertical axis of the left stick.
+        *
+        * Negative is up, positive is down.
+        */
+       LEFT_Y,
+
+       /**
+        * The horizontal axis of the right stick.
+        *
+        * Negative is left, positive is right.
+        */
+       RIGHT_X,
+
+       /**
+        * The vertical axis of the right stick.
+        *
+        * Negative is up, positive is down.
+        */
+       RIGHT_Y,
+}