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/*
* 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);
}
}
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