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      1 /*
      2  * Copyright (C) 2012 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.keyguard;
     18 
     19 import android.content.Context;
     20 import android.content.res.TypedArray;
     21 import android.text.SpannableStringBuilder;
     22 import android.text.style.TextAppearanceSpan;
     23 import android.util.AttributeSet;
     24 import android.view.HapticFeedbackConstants;
     25 import android.view.View;
     26 import android.widget.Button;
     27 import android.widget.TextView;
     28 
     29 import com.android.internal.widget.LockPatternUtils;
     30 
     31 public class NumPadKey extends Button {
     32     // list of "ABC", etc per digit, starting with '0'
     33     static String sKlondike[];
     34 
     35     int mDigit = -1;
     36     int mTextViewResId;
     37     TextView mTextView = null;
     38     boolean mEnableHaptics;
     39 
     40     private View.OnClickListener mListener = new View.OnClickListener() {
     41         @Override
     42         public void onClick(View thisView) {
     43             if (mTextView == null) {
     44                 if (mTextViewResId > 0) {
     45                     final View v = NumPadKey.this.getRootView().findViewById(mTextViewResId);
     46                     if (v != null && v instanceof TextView) {
     47                         mTextView = (TextView) v;
     48                     }
     49                 }
     50             }
     51             // check for time-based lockouts
     52             if (mTextView != null && mTextView.isEnabled()) {
     53                 mTextView.append(String.valueOf(mDigit));
     54             }
     55             doHapticKeyClick();
     56         }
     57     };
     58 
     59     public NumPadKey(Context context) {
     60         this(context, null);
     61     }
     62 
     63     public NumPadKey(Context context, AttributeSet attrs) {
     64         this(context, attrs, 0);
     65     }
     66 
     67     public NumPadKey(Context context, AttributeSet attrs, int defStyle) {
     68         super(context, attrs, defStyle);
     69 
     70         TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.NumPadKey);
     71         mDigit = a.getInt(R.styleable.NumPadKey_digit, mDigit);
     72         setTextViewResId(a.getResourceId(R.styleable.NumPadKey_textView, 0));
     73 
     74         setOnClickListener(mListener);
     75         setOnHoverListener(new LiftToActivateListener(context));
     76         setAccessibilityDelegate(new ObscureSpeechDelegate(context));
     77 
     78         mEnableHaptics = new LockPatternUtils(context).isTactileFeedbackEnabled();
     79 
     80         SpannableStringBuilder builder = new SpannableStringBuilder();
     81         builder.append(String.valueOf(mDigit));
     82         if (mDigit >= 0) {
     83             if (sKlondike == null) {
     84                 sKlondike = context.getResources().getStringArray(
     85                         R.array.lockscreen_num_pad_klondike);
     86             }
     87             if (sKlondike != null && sKlondike.length > mDigit) {
     88                 final String extra = sKlondike[mDigit];
     89                 final int extraLen = extra.length();
     90                 if (extraLen > 0) {
     91                     builder.append(" ");
     92                     builder.append(extra);
     93                     builder.setSpan(
     94                         new TextAppearanceSpan(context, R.style.TextAppearance_NumPadKey_Klondike),
     95                         builder.length()-extraLen, builder.length(), 0);
     96                 }
     97             }
     98         }
     99         setText(builder);
    100     }
    101 
    102     @Override
    103     public void onDetachedFromWindow() {
    104         super.onDetachedFromWindow();
    105 
    106         // Reset the "announced headset" flag when detached.
    107         ObscureSpeechDelegate.sAnnouncedHeadset = false;
    108     }
    109 
    110     public void setTextView(TextView tv) {
    111         mTextView = tv;
    112     }
    113 
    114     public void setTextViewResId(int resId) {
    115         mTextView = null;
    116         mTextViewResId = resId;
    117     }
    118 
    119     // Cause a VIRTUAL_KEY vibration
    120     public void doHapticKeyClick() {
    121         if (mEnableHaptics) {
    122             performHapticFeedback(HapticFeedbackConstants.VIRTUAL_KEY,
    123                     HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING
    124                     | HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING);
    125         }
    126     }
    127 }
    128