The Android Open Source Project | 792a220 | 2009-03-03 19:32:30 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 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.music; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.os.SystemClock; |
| 21 | import android.util.AttributeSet; |
| 22 | import android.view.KeyEvent; |
| 23 | import android.view.MotionEvent; |
| 24 | import android.view.View; |
| 25 | import android.widget.ImageButton; |
| 26 | |
| 27 | /** |
| 28 | * A button that will repeatedly call a 'listener' method |
| 29 | * as long as the button is pressed. |
| 30 | */ |
| 31 | public class RepeatingImageButton extends ImageButton { |
The Android Open Source Project | 792a220 | 2009-03-03 19:32:30 -0800 | [diff] [blame] | 32 | private long mStartTime; |
| 33 | private int mRepeatCount; |
| 34 | private RepeatListener mListener; |
| 35 | private long mInterval = 500; |
Jack He | b0fba8b | 2017-01-26 15:54:38 -0800 | [diff] [blame] | 36 | |
The Android Open Source Project | 792a220 | 2009-03-03 19:32:30 -0800 | [diff] [blame] | 37 | public RepeatingImageButton(Context context) { |
| 38 | this(context, null); |
| 39 | } |
| 40 | |
| 41 | public RepeatingImageButton(Context context, AttributeSet attrs) { |
| 42 | this(context, attrs, android.R.attr.imageButtonStyle); |
| 43 | } |
| 44 | |
| 45 | public RepeatingImageButton(Context context, AttributeSet attrs, int defStyle) { |
| 46 | super(context, attrs, defStyle); |
| 47 | setFocusable(true); |
| 48 | setLongClickable(true); |
| 49 | } |
Jack He | b0fba8b | 2017-01-26 15:54:38 -0800 | [diff] [blame] | 50 | |
The Android Open Source Project | 792a220 | 2009-03-03 19:32:30 -0800 | [diff] [blame] | 51 | /** |
| 52 | * Sets the listener to be called while the button is pressed and |
| 53 | * the interval in milliseconds with which it will be called. |
| 54 | * @param l The listener that will be called |
Jack He | b0fba8b | 2017-01-26 15:54:38 -0800 | [diff] [blame] | 55 | * @param interval The interval in milliseconds for calls |
The Android Open Source Project | 792a220 | 2009-03-03 19:32:30 -0800 | [diff] [blame] | 56 | */ |
| 57 | public void setRepeatListener(RepeatListener l, long interval) { |
| 58 | mListener = l; |
| 59 | mInterval = interval; |
| 60 | } |
Jack He | b0fba8b | 2017-01-26 15:54:38 -0800 | [diff] [blame] | 61 | |
The Android Open Source Project | 792a220 | 2009-03-03 19:32:30 -0800 | [diff] [blame] | 62 | @Override |
| 63 | public boolean performLongClick() { |
| 64 | mStartTime = SystemClock.elapsedRealtime(); |
| 65 | mRepeatCount = 0; |
| 66 | post(mRepeater); |
| 67 | return true; |
| 68 | } |
Jack He | b0fba8b | 2017-01-26 15:54:38 -0800 | [diff] [blame] | 69 | |
The Android Open Source Project | 792a220 | 2009-03-03 19:32:30 -0800 | [diff] [blame] | 70 | @Override |
| 71 | public boolean onTouchEvent(MotionEvent event) { |
| 72 | if (event.getAction() == MotionEvent.ACTION_UP) { |
| 73 | // remove the repeater, but call the hook one more time |
| 74 | removeCallbacks(mRepeater); |
| 75 | if (mStartTime != 0) { |
| 76 | doRepeat(true); |
| 77 | mStartTime = 0; |
| 78 | } |
| 79 | } |
| 80 | return super.onTouchEvent(event); |
| 81 | } |
| 82 | |
| 83 | @Override |
Marco Nelissen | 59316fd | 2009-07-21 15:40:06 -0700 | [diff] [blame] | 84 | public boolean onKeyDown(int keyCode, KeyEvent event) { |
| 85 | switch (keyCode) { |
| 86 | case KeyEvent.KEYCODE_DPAD_CENTER: |
| 87 | case KeyEvent.KEYCODE_ENTER: |
| 88 | // need to call super to make long press work, but return |
| 89 | // true so that the application doesn't get the down event. |
| 90 | super.onKeyDown(keyCode, event); |
| 91 | return true; |
| 92 | } |
| 93 | return super.onKeyDown(keyCode, event); |
| 94 | } |
| 95 | |
| 96 | @Override |
The Android Open Source Project | 792a220 | 2009-03-03 19:32:30 -0800 | [diff] [blame] | 97 | public boolean onKeyUp(int keyCode, KeyEvent event) { |
| 98 | switch (keyCode) { |
Jack He | b0fba8b | 2017-01-26 15:54:38 -0800 | [diff] [blame] | 99 | case KeyEvent.KEYCODE_DPAD_CENTER: |
| 100 | case KeyEvent.KEYCODE_ENTER: |
| 101 | // remove the repeater, but call the hook one more time |
| 102 | removeCallbacks(mRepeater); |
| 103 | if (mStartTime != 0) { |
| 104 | doRepeat(true); |
| 105 | mStartTime = 0; |
| 106 | } |
The Android Open Source Project | 792a220 | 2009-03-03 19:32:30 -0800 | [diff] [blame] | 107 | } |
| 108 | return super.onKeyUp(keyCode, event); |
| 109 | } |
Jack He | b0fba8b | 2017-01-26 15:54:38 -0800 | [diff] [blame] | 110 | |
The Android Open Source Project | 792a220 | 2009-03-03 19:32:30 -0800 | [diff] [blame] | 111 | private Runnable mRepeater = new Runnable() { |
| 112 | public void run() { |
| 113 | doRepeat(false); |
| 114 | if (isPressed()) { |
| 115 | postDelayed(this, mInterval); |
| 116 | } |
| 117 | } |
| 118 | }; |
| 119 | |
Jack He | b0fba8b | 2017-01-26 15:54:38 -0800 | [diff] [blame] | 120 | private void doRepeat(boolean last) { |
The Android Open Source Project | 792a220 | 2009-03-03 19:32:30 -0800 | [diff] [blame] | 121 | long now = SystemClock.elapsedRealtime(); |
| 122 | if (mListener != null) { |
| 123 | mListener.onRepeat(this, now - mStartTime, last ? -1 : mRepeatCount++); |
| 124 | } |
| 125 | } |
Jack He | b0fba8b | 2017-01-26 15:54:38 -0800 | [diff] [blame] | 126 | |
The Android Open Source Project | 792a220 | 2009-03-03 19:32:30 -0800 | [diff] [blame] | 127 | public interface RepeatListener { |
| 128 | /** |
| 129 | * This method will be called repeatedly at roughly the interval |
| 130 | * specified in setRepeatListener(), for as long as the button |
| 131 | * is pressed. |
| 132 | * @param v The button as a View. |
| 133 | * @param duration The number of milliseconds the button has been pressed so far. |
| 134 | * @param repeatcount The number of previous calls in this sequence. |
| 135 | * If this is going to be the last call in this sequence (i.e. the user |
Jack He | b0fba8b | 2017-01-26 15:54:38 -0800 | [diff] [blame] | 136 | * just stopped pressing the button), the value will be -1. |
The Android Open Source Project | 792a220 | 2009-03-03 19:32:30 -0800 | [diff] [blame] | 137 | */ |
| 138 | void onRepeat(View v, long duration, int repeatcount); |
| 139 | } |
| 140 | } |