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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
      5  * except in compliance with the License. You may obtain a copy of the License at
      6  *
      7  *      http://www.apache.org/licenses/LICENSE-2.0
      8  *
      9  * Unless required by applicable law or agreed to in writing, software distributed under the
     10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     11  * KIND, either express or implied. See the License for the specific language governing
     12  * permissions and limitations under the License.
     13  */
     14 
     15 package com.android.systemui.tuner;
     16 
     17 import android.annotation.Nullable;
     18 import android.app.AlertDialog;
     19 import android.app.Dialog;
     20 import android.app.DialogFragment;
     21 import android.content.Context;
     22 import android.content.DialogInterface;
     23 import android.content.DialogInterface.OnClickListener;
     24 import android.os.Bundle;
     25 import android.support.v14.preference.ListPreferenceDialogFragment;
     26 import android.support.v7.preference.ListPreference;
     27 import android.util.AttributeSet;
     28 import android.view.LayoutInflater;
     29 import android.view.View;
     30 import android.view.ViewGroup;
     31 
     32 public class CustomListPreference extends ListPreference {
     33 
     34     public CustomListPreference(Context context, AttributeSet attrs) {
     35         super(context, attrs);
     36     }
     37 
     38     public CustomListPreference(Context context, AttributeSet attrs, int defStyleAttr,
     39                                 int defStyleRes) {
     40         super(context, attrs, defStyleAttr, defStyleRes);
     41     }
     42 
     43     protected void onPrepareDialogBuilder(AlertDialog.Builder builder,
     44             OnClickListener listener) {
     45     }
     46 
     47     protected void onDialogClosed(boolean positiveResult) {
     48     }
     49 
     50     protected Dialog onDialogCreated(DialogFragment fragment, Dialog dialog) {
     51         return dialog;
     52     }
     53 
     54     protected boolean isAutoClosePreference() {
     55         return true;
     56     }
     57 
     58     /**
     59      * Called when a user is about to choose the given value, to determine if we
     60      * should show a confirmation dialog.
     61      *
     62      * @param value the value the user is about to choose
     63      * @return the message to show in a confirmation dialog, or {@code null} to
     64      *         not request confirmation
     65      */
     66     protected CharSequence getConfirmationMessage(String value) {
     67         return null;
     68     }
     69 
     70     protected void onDialogStateRestored(DialogFragment fragment, Dialog dialog,
     71             Bundle savedInstanceState) {
     72     }
     73 
     74     public static class CustomListPreferenceDialogFragment extends ListPreferenceDialogFragment {
     75 
     76         private static final String KEY_CLICKED_ENTRY_INDEX
     77                 = "settings.CustomListPrefDialog.KEY_CLICKED_ENTRY_INDEX";
     78 
     79         private int mClickedDialogEntryIndex;
     80 
     81         public static ListPreferenceDialogFragment newInstance(String key) {
     82             final ListPreferenceDialogFragment fragment = new CustomListPreferenceDialogFragment();
     83             final Bundle b = new Bundle(1);
     84             b.putString(ARG_KEY, key);
     85             fragment.setArguments(b);
     86             return fragment;
     87         }
     88 
     89         public CustomListPreference getCustomizablePreference() {
     90             return (CustomListPreference) getPreference();
     91         }
     92 
     93         @Override
     94         protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
     95             super.onPrepareDialogBuilder(builder);
     96             mClickedDialogEntryIndex = getCustomizablePreference()
     97                     .findIndexOfValue(getCustomizablePreference().getValue());
     98             getCustomizablePreference().onPrepareDialogBuilder(builder, getOnItemClickListener());
     99             if (!getCustomizablePreference().isAutoClosePreference()) {
    100                 builder.setPositiveButton(com.android.internal.R.string.ok, new OnClickListener() {
    101                     @Override
    102                     public void onClick(DialogInterface dialog, int which) {
    103                         onItemConfirmed();
    104                     }
    105                 });
    106             }
    107         }
    108 
    109         @Override
    110         public Dialog onCreateDialog(Bundle savedInstanceState) {
    111             Dialog dialog = super.onCreateDialog(savedInstanceState);
    112             if (savedInstanceState != null) {
    113                 mClickedDialogEntryIndex = savedInstanceState.getInt(KEY_CLICKED_ENTRY_INDEX,
    114                         mClickedDialogEntryIndex);
    115             }
    116             return getCustomizablePreference().onDialogCreated(this, dialog);
    117         }
    118 
    119         @Override
    120         public void onSaveInstanceState(Bundle outState) {
    121             super.onSaveInstanceState(outState);
    122             outState.putInt(KEY_CLICKED_ENTRY_INDEX, mClickedDialogEntryIndex);
    123         }
    124 
    125         @Override
    126         public void onActivityCreated(Bundle savedInstanceState) {
    127             super.onActivityCreated(savedInstanceState);
    128             getCustomizablePreference().onDialogStateRestored(this, getDialog(), savedInstanceState);
    129         }
    130 
    131         protected OnClickListener getOnItemClickListener() {
    132             return new OnClickListener() {
    133                 @Override
    134                 public void onClick(DialogInterface dialog, int which) {
    135                     setClickedDialogEntryIndex(which);
    136                     if (getCustomizablePreference().isAutoClosePreference()) {
    137                         onItemConfirmed();
    138                     }
    139                 }
    140             };
    141         }
    142 
    143         protected void setClickedDialogEntryIndex(int which) {
    144             mClickedDialogEntryIndex = which;
    145         }
    146 
    147         private String getValue() {
    148             final ListPreference preference = getCustomizablePreference();
    149             if (mClickedDialogEntryIndex >= 0 && preference.getEntryValues() != null) {
    150                 return preference.getEntryValues()[mClickedDialogEntryIndex].toString();
    151             } else {
    152                 return null;
    153             }
    154         }
    155 
    156         protected void onItemConfirmed() {
    157             onClick(getDialog(), DialogInterface.BUTTON_POSITIVE);
    158             getDialog().dismiss();
    159         }
    160 
    161         @Override
    162         public void onDialogClosed(boolean positiveResult) {
    163             getCustomizablePreference().onDialogClosed(positiveResult);
    164             final ListPreference preference = getCustomizablePreference();
    165             final String value = getValue();
    166             if (positiveResult && value != null) {
    167                 if (preference.callChangeListener(value)) {
    168                     preference.setValue(value);
    169                 }
    170             }
    171         }
    172     }
    173 }
    174