use system properties to specify input preference

Author: electronstudio

src/uk/co/electronstudio/sdl2gdx/SDL2ControllerManager.java

@@ -10,7 +10,7 @@
 import com.badlogic.gdx.utils.IntArray;
 import org.libsdl.*;
 
-import static uk.co.electronstudio.sdl2gdx.SDL2ControllerManager.InputPreference.XINPUT;
+import static uk.co.electronstudio.sdl2gdx.SDL2ControllerManager.InputPreference.*;
 
 public class SDL2ControllerManager implements ControllerManager {
 
@@ -22,7 +22,18 @@ public class SDL2ControllerManager implements ControllerManager {
     private boolean running = true;
 
     public SDL2ControllerManager() {
-        this(XINPUT);
+        this(getInputPreferenceProperty());
+    }
+
+    private static InputPreference getInputPreferenceProperty() {
+        String ip = System.getProperty("SDL.input");
+        if(ip==null) return XINPUT;
+        switch (ip){
+            case "XINPUT": return XINPUT;
+            case "RAW_INPUT": return RAW_INPUT;
+            case "DIRECT_INPUT": return DIRECT_INPUT;
+            default: return XINPUT;
+        }
     }
 
     public enum InputPreference{

src/uk/co/electronstudio/sdl2gdx/tests/SDLTest.java

@@ -40,7 +40,8 @@ public static void main(String[] args) {
     }
 
     private static void init() {
-
+        //System.setProperty("SDL.input","DIRECT_INPUT");
+        //controllerManager = new SDL2ControllerManager();
         controllerManager = new SDL2ControllerManager((SDL2ControllerManager.InputPreference) inputPref.getSelectedItem());
     }