1 files changed, 104 insertions, 0 deletions
diff --git a/RotaryPlayground/src/com/android/car/rotaryplayground/CustomSurfaceView.java b/RotaryPlayground/src/com/android/car/rotaryplayground/CustomSurfaceView.java
new file mode 100644
index 0000000..ec6d895
--- /dev/null
+++ b/RotaryPlayground/src/com/android/car/rotaryplayground/CustomSurfaceView.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.car.rotaryplayground;
+
+import static com.android.car.ui.utils.RotaryConstants.BOTTOM_BOUND_OFFSET_FOR_NUDGE;
+import static com.android.car.ui.utils.RotaryConstants.LEFT_BOUND_OFFSET_FOR_NUDGE;
+import static com.android.car.ui.utils.RotaryConstants.RIGHT_BOUND_OFFSET_FOR_NUDGE;
+import static com.android.car.ui.utils.RotaryConstants.TOP_BOUND_OFFSET_FOR_NUDGE;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.os.Bundle;
+import android.util.AttributeSet;
+import android.view.SurfaceView;
+import android.view.accessibility.AccessibilityNodeInfo;
+
+import androidx.annotation.Nullable;
+
+/**
+ * A SurfaceView that allows to set its perceived bounds for the purposes of finding the nudge
+ * target.
+ */
+public class CustomSurfaceView extends SurfaceView {
+
+    /**
+     * The offset (in pixels) of the SurfaceView's bounds for the purposes of finding the nudge
+     * target.
+     */
+    private int mLeftOffset;
+    private int mRightOffset;
+    private int mTopOffset;
+    private int mBottomOffset;
+
+    public CustomSurfaceView(Context context) {
+        super(context);
+    }
+
+    public CustomSurfaceView(Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public CustomSurfaceView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public CustomSurfaceView(Context context, @Nullable AttributeSet attrs, int defStyleAttr,
+            int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    /**
+     * Sets the offset (in pixels) of the SurfaceView's bounds.
+     * <p>
+     * It only affects the perceived bounds for the purposes of finding the nudge target.
+     * This doesn't affect the view's bounds. This method should only be used when this view
+     * overlaps other focusable views so that nudge targeting is ambiguous.
+     */
+    public void setBoundsOffset(int left, int top, int right, int bottom) {
+        mLeftOffset = left;
+        mTopOffset = top;
+        mRightOffset = right;
+        mBottomOffset = bottom;
+    }
+
+    @Override
+    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
+        super.onInitializeAccessibilityNodeInfo(info);
+        if (mLeftOffset == 0 && mTopOffset == 0 && mRightOffset == 0 && mBottomOffset == 0) {
+            return;
+        }
+        Bundle bundle = info.getExtras();
+        bundle.putInt(LEFT_BOUND_OFFSET_FOR_NUDGE, mLeftOffset);
+        bundle.putInt(RIGHT_BOUND_OFFSET_FOR_NUDGE, mRightOffset);
+        bundle.putInt(TOP_BOUND_OFFSET_FOR_NUDGE, mTopOffset);
+        bundle.putInt(BOTTOM_BOUND_OFFSET_FOR_NUDGE, mBottomOffset);
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        super.onDraw(canvas);
+
+        // Draw a text for demonstration purpose.
+        Paint paint = new Paint();
+        paint.setColor(Color.BLACK);
+        paint.setTextSize(40);
+        canvas.drawText("SurfaceView", 400, 200, paint);
+    }
+}