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      1 /*
      2  * Copyright (C) 2007 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.settings.quicklaunch;
     18 
     19 import com.android.settings.R;
     20 
     21 import android.content.Context;
     22 import android.content.res.ColorStateList;
     23 import android.preference.Preference;
     24 import android.util.TypedValue;
     25 import android.view.View;
     26 import android.widget.TextView;
     27 
     28 /**
     29  * Preference type for a shortcut in {@link QuickLaunchSettings}.
     30  */
     31 public class ShortcutPreference extends Preference implements Comparable<Preference> {
     32 
     33     private static Object sStaticVarsLock = new Object();
     34 
     35     // These static fields are used across all instances of ShortcutPreference.
     36     // There will be many ShortcutPreference instances (~36 for US).
     37     private static String STRING_ASSIGN_APPLICATION;
     38     private static String STRING_NO_SHORTCUT;
     39 
     40     private static int sDimAlpha;
     41     private static ColorStateList sRegularTitleColor;
     42     private static ColorStateList sDimTitleColor;
     43     private static ColorStateList sRegularSummaryColor;
     44     private static ColorStateList sDimSummaryColor;
     45 
     46     private char mShortcut;
     47     private boolean mHasBookmark;
     48 
     49     public ShortcutPreference(Context context, char shortcut) {
     50         super(context);
     51 
     52         synchronized (sStaticVarsLock) {
     53             // Init statics. This should only happen for the first ShortcutPreference created,
     54             // the rest will already have them initialized.
     55             if (STRING_ASSIGN_APPLICATION == null) {
     56                 STRING_ASSIGN_APPLICATION = context.getString(R.string.quick_launch_assign_application);
     57                 STRING_NO_SHORTCUT = context.getString(R.string.quick_launch_no_shortcut);
     58 
     59                 TypedValue outValue = new TypedValue();
     60                 context.getTheme().resolveAttribute(android.R.attr.disabledAlpha, outValue, true);
     61                 sDimAlpha = (int) (outValue.getFloat() * 255);
     62             }
     63         }
     64 
     65         mShortcut = shortcut;
     66 
     67         setWidgetLayoutResource(R.layout.preference_widget_shortcut);
     68     }
     69 
     70     public char getShortcut() {
     71         return mShortcut;
     72     }
     73 
     74     public void setShortcut(char shortcut) {
     75         if (shortcut != mShortcut) {
     76             mShortcut = shortcut;
     77             notifyChanged();
     78         }
     79     }
     80 
     81     public boolean hasBookmark() {
     82         return mHasBookmark;
     83     }
     84 
     85     public void setHasBookmark(boolean hasBookmark) {
     86         if (hasBookmark != mHasBookmark) {
     87             mHasBookmark = hasBookmark;
     88             notifyChanged();
     89         }
     90     }
     91 
     92     @Override
     93     public CharSequence getTitle() {
     94         return mHasBookmark ? super.getTitle() : STRING_ASSIGN_APPLICATION;
     95     }
     96 
     97     @Override
     98     public CharSequence getSummary() {
     99         return mHasBookmark ? super.getSummary() : STRING_NO_SHORTCUT;
    100     }
    101 
    102     @Override
    103     protected void onBindView(View view) {
    104         super.onBindView(view);
    105 
    106         TextView shortcutView = (TextView) view.findViewById(R.id.shortcut);
    107         if (shortcutView != null) {
    108             shortcutView.setText(String.valueOf(mShortcut));
    109         }
    110 
    111         TextView titleView = (TextView) view.findViewById(android.R.id.title);
    112 
    113         synchronized (sStaticVarsLock) {
    114             if (sRegularTitleColor == null) {
    115                 sRegularTitleColor = titleView.getTextColors();
    116                 sDimTitleColor = sRegularTitleColor.withAlpha(sDimAlpha);
    117             }
    118         }
    119 
    120         ColorStateList color = mHasBookmark ? sRegularTitleColor : sDimTitleColor;
    121         if (color != null) {
    122             titleView.setTextColor(color);
    123         }
    124 
    125         TextView summaryView = (TextView) view.findViewById(android.R.id.summary);
    126 
    127         synchronized (sStaticVarsLock) {
    128             if (sRegularSummaryColor == null) {
    129                 sRegularSummaryColor = summaryView.getTextColors();
    130                 sDimSummaryColor = sRegularSummaryColor.withAlpha(sDimAlpha);
    131             }
    132         }
    133 
    134         color = mHasBookmark ? sRegularSummaryColor : sDimSummaryColor;
    135         if (color != null) {
    136             summaryView.setTextColor(color);
    137         }
    138 
    139     }
    140 
    141     public int compareTo(Preference another) {
    142         if (!(another instanceof ShortcutPreference)) return super.compareTo(another);
    143 
    144         // Letters before digits
    145         char other = ((ShortcutPreference) another).mShortcut;
    146         if (Character.isDigit(mShortcut) && Character.isLetter(other)) return 1;
    147         else if (Character.isDigit(other) && Character.isLetter(mShortcut)) return -1;
    148         else return mShortcut - other;
    149     }
    150 
    151 }
    152