Merge pull request #88130 from AlekseyKapustyanenko/Rotary_Input

Add rotary input support for Android platform

2 files changed, 30 insertions, 2 deletions

diff --git a/platform/android/java/lib/src/org/godotengine/godot/Godot.kt b/platform/android/java/lib/src/org/godotengine/godot/Godot.kt
index dd007a4254..a0e020b55e 100644
--- a/platform/android/java/lib/src/org/godotengine/godot/Godot.kt
+++ b/platform/android/java/lib/src/org/godotengine/godot/Godot.kt
@@ -610,11 +610,13 @@ class Godot(private val context: Context) : SensorEventListener {
 		// These properties are defined after Godot setup completion, so we retrieve them here.
 		val longPressEnabled = java.lang.Boolean.parseBoolean(GodotLib.getGlobal("input_devices/pointing/android/enable_long_press_as_right_click"))
 		val panScaleEnabled = java.lang.Boolean.parseBoolean(GodotLib.getGlobal("input_devices/pointing/android/enable_pan_and_scale_gestures"))
+		val rotaryInputAxis = java.lang.Integer.parseInt(GodotLib.getGlobal("input_devices/pointing/android/rotary_input_scroll_axis"));
 
 		runOnUiThread {
 			renderView?.inputHandler?.apply {
 				enableLongPress(longPressEnabled)
 				enablePanningAndScalingGestures(panScaleEnabled)
+				setRotaryInputAxis(rotaryInputAxis)
 			}
 		}
 
diff --git a/platform/android/java/lib/src/org/godotengine/godot/input/GodotInputHandler.java b/platform/android/java/lib/src/org/godotengine/godot/input/GodotInputHandler.java
index 38c115ad7f..fe971cf442 100644
--- a/platform/android/java/lib/src/org/godotengine/godot/input/GodotInputHandler.java
+++ b/platform/android/java/lib/src/org/godotengine/godot/input/GodotInputHandler.java
@@ -57,6 +57,9 @@ import java.util.Set;
 public class GodotInputHandler implements InputManager.InputDeviceListener {
 	private static final String TAG = GodotInputHandler.class.getSimpleName();
 
+	private static final int ROTARY_INPUT_VERTICAL_AXIS = 1;
+	private static final int ROTARY_INPUT_HORIZONTAL_AXIS = 0;
+
 	private final SparseIntArray mJoystickIds = new SparseIntArray(4);
 	private final SparseArray<Joystick> mJoysticksDevices = new SparseArray<>(4);
 
@@ -71,6 +74,8 @@ public class GodotInputHandler implements InputManager.InputDeviceListener {
 	 */
 	private int lastSeenToolType = MotionEvent.TOOL_TYPE_UNKNOWN;
 
+	private static int rotaryInputAxis = ROTARY_INPUT_VERTICAL_AXIS;
+
 	public GodotInputHandler(GodotRenderView godotView) {
 		final Context context = godotView.getView().getContext();
 		mRenderView = godotView;
@@ -102,6 +107,13 @@ public class GodotInputHandler implements InputManager.InputDeviceListener {
 		this.godotGestureHandler.setPanningAndScalingEnabled(enable);
 	}
 
+	/**
+	 * On Wear OS devices, sets which axis of the mouse wheel rotary input is mapped to. This is 1 (vertical axis) by default.
+	 */
+	public void setRotaryInputAxis(int axis) {
+		rotaryInputAxis = axis;
+	}
+
 	private boolean isKeyEventGameDevice(int source) {
 		// Note that keyboards are often (SOURCE_KEYBOARD | SOURCE_DPAD)
 		if (source == (InputDevice.SOURCE_KEYBOARD | InputDevice.SOURCE_DPAD))
@@ -484,8 +496,22 @@ public class GodotInputHandler implements InputManager.InputDeviceListener {
 		final float tiltX = (float)-Math.sin(orientation) * tiltMult;
 		final float tiltY = (float)Math.cos(orientation) * tiltMult;
 
-		final float verticalFactor = event.getAxisValue(MotionEvent.AXIS_VSCROLL);
-		final float horizontalFactor = event.getAxisValue(MotionEvent.AXIS_HSCROLL);
+		float verticalFactor = 0;
+		float horizontalFactor = 0;
+
+		// If event came from RotaryEncoder (Bezel or Crown rotate event on Wear OS smart watches),
+		// convert it to mouse wheel event.
+		if (event.isFromSource(InputDevice.SOURCE_ROTARY_ENCODER)) {
+			if (rotaryInputAxis == ROTARY_INPUT_HORIZONTAL_AXIS) {
+				horizontalFactor = -event.getAxisValue(MotionEvent.AXIS_SCROLL);
+			} else {
+				// If rotaryInputAxis is not ROTARY_INPUT_HORIZONTAL_AXIS then use default ROTARY_INPUT_VERTICAL_AXIS axis.
+				verticalFactor = -event.getAxisValue(MotionEvent.AXIS_SCROLL);
+			}
+		} else {
+			verticalFactor = event.getAxisValue(MotionEvent.AXIS_VSCROLL);
+			horizontalFactor = event.getAxisValue(MotionEvent.AXIS_HSCROLL);
+		}
 		boolean sourceMouseRelative = false;
 		if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
 			sourceMouseRelative = event.isFromSource(InputDevice.SOURCE_MOUSE_RELATIVE);