1 /* 2 * Copyright (C) 2020 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 17 package com.android.emergency.widgets.slider; 18 19 import android.content.Context; 20 import android.graphics.drawable.Drawable; 21 import android.util.AttributeSet; 22 import android.view.MotionEvent; 23 import android.widget.SeekBar; 24 25 /** A custom {@link SeekBar} that has a threshold to send completion event to listeners. */ 26 public final class SliderSeekBar extends SeekBar { 27 28 static final int SLIDE_MAX_SLIDE_SCALE = 1000; 29 private static final float SLIDE_COMPLETE_THRESHOLD = 0.8f; 30 31 private Drawable mThumb; 32 private OnSlideCompleteListener mListener; 33 SliderSeekBar(Context context)34 public SliderSeekBar(Context context) { 35 super(context); 36 } 37 SliderSeekBar(Context context, AttributeSet attrs)38 public SliderSeekBar(Context context, AttributeSet attrs) { 39 super(context, attrs); 40 setMax(SLIDE_MAX_SLIDE_SCALE); 41 } 42 43 @Override setThumb(Drawable thumb)44 public void setThumb(Drawable thumb) { 45 this.mThumb = thumb; 46 super.setThumb(thumb); 47 } 48 49 @Override onTouchEvent(MotionEvent event)50 public boolean onTouchEvent(MotionEvent event) { 51 switch (event.getAction()) { 52 case MotionEvent.ACTION_DOWN: { 53 if (!mThumb.getBounds().contains((int) event.getX(), (int) event.getY())) { 54 // Only handle when within bound 55 return false; 56 } 57 super.onTouchEvent(event); 58 } 59 break; 60 case MotionEvent.ACTION_UP: { 61 if (getProgress() > SLIDE_COMPLETE_THRESHOLD * SLIDE_MAX_SLIDE_SCALE) { 62 if (mListener != null) { 63 mListener.onSlideComplete(); 64 } 65 // Event completed, snap to end 66 setProgress(SLIDE_MAX_SLIDE_SCALE); 67 }else { 68 // Event not completed, snap back to beginning 69 setProgress(0); 70 } 71 } 72 break; 73 default: 74 super.onTouchEvent(event); 75 } 76 return true; 77 } 78 setOnSlideCompleteListener(OnSlideCompleteListener listener)79 void setOnSlideCompleteListener(OnSlideCompleteListener listener) { 80 this.mListener = listener; 81 } 82 }