1 /* 2 * Copyright (C) 2021 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.launcher3.util; 17 18 import android.content.Context; 19 import android.graphics.Canvas; 20 import android.graphics.RenderNode; 21 import android.widget.EdgeEffect; 22 23 /** 24 * Extension of {@link EdgeEffect} which translates the content instead of the default 25 * platform implementation 26 */ 27 @SuppressWarnings("NewApi") 28 public class TranslateEdgeEffect extends EdgeEffectCompat { 29 30 private final RenderNode mNode; 31 TranslateEdgeEffect(Context context)32 public TranslateEdgeEffect(Context context) { 33 super(context); 34 mNode = new RenderNode("TranslateEdgeEffect"); 35 } 36 37 @Override draw(Canvas canvas)38 public boolean draw(Canvas canvas) { 39 return false; 40 } 41 getTranslationShift(float[] out)42 public boolean getTranslationShift(float[] out) { 43 Canvas c = mNode.beginRecording(1, 1); 44 boolean result = super.draw(c); 45 mNode.endRecording(); 46 47 out[0] = getDistance(); 48 return result; 49 } 50 } 51