1/*
2 * Copyright (C) 2013 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
17package com.android.timezonepicker;
18
19import android.content.Context;
20import android.graphics.drawable.Drawable;
21import android.text.Editable;
22import android.text.Spannable;
23import android.text.SpannableStringBuilder;
24import android.text.TextWatcher;
25import android.text.style.ImageSpan;
26import android.util.AttributeSet;
27import android.view.LayoutInflater;
28import android.view.View;
29import android.view.View.OnClickListener;
30import android.view.inputmethod.InputMethodManager;
31import android.widget.AdapterView;
32import android.widget.AdapterView.OnItemClickListener;
33import android.widget.AutoCompleteTextView;
34import android.widget.ImageButton;
35import android.widget.LinearLayout;
36import android.widget.ListView;
37
38public class TimeZonePickerView extends LinearLayout implements TextWatcher, OnItemClickListener,
39    OnClickListener {
40    private static final String TAG = "TimeZonePickerView";
41
42    private Context mContext;
43    private AutoCompleteTextView mAutoCompleteTextView;
44    private TimeZoneFilterTypeAdapter mFilterAdapter;
45    private boolean mHideFilterSearchOnStart = false;
46    private boolean mFirstTime = true;
47    TimeZoneResultAdapter mResultAdapter;
48
49    private ImageButton mClearButton;
50
51    public interface OnTimeZoneSetListener {
52        void onTimeZoneSet(TimeZoneInfo tzi);
53    }
54
55    public TimeZonePickerView(Context context, AttributeSet attrs,
56            String timeZone, long timeMillis, OnTimeZoneSetListener l,
57            boolean hideFilterSearch) {
58        super(context, attrs);
59        mContext = context;
60        LayoutInflater inflater = (LayoutInflater) context.getSystemService(
61                Context.LAYOUT_INFLATER_SERVICE);
62        inflater.inflate(R.layout.timezonepickerview, this, true);
63
64        mHideFilterSearchOnStart = hideFilterSearch;
65
66        TimeZoneData tzd = new TimeZoneData(mContext, timeZone, timeMillis);
67
68        mResultAdapter = new TimeZoneResultAdapter(mContext, tzd, l);
69        ListView timeZoneList = (ListView) findViewById(R.id.timezonelist);
70        timeZoneList.setAdapter(mResultAdapter);
71        timeZoneList.setOnItemClickListener(mResultAdapter);
72
73        mFilterAdapter = new TimeZoneFilterTypeAdapter(mContext, tzd, mResultAdapter);
74
75        mAutoCompleteTextView = (AutoCompleteTextView) findViewById(R.id.searchBox);
76        mAutoCompleteTextView.addTextChangedListener(this);
77        mAutoCompleteTextView.setOnItemClickListener(this);
78        mAutoCompleteTextView.setOnClickListener(this);
79
80        updateHint(R.string.hint_time_zone_search, R.drawable.ic_search_holo_light);
81        mClearButton = (ImageButton) findViewById(R.id.clear_search);
82        mClearButton.setOnClickListener(new OnClickListener() {
83            @Override
84            public void onClick(View v) {
85                mAutoCompleteTextView.getEditableText().clear();
86            }
87        });
88    }
89
90    public void showFilterResults(int type, String string, int time) {
91        if (mResultAdapter != null) {
92            mResultAdapter.onSetFilter(type, string, time);
93        }
94    }
95
96    public boolean hasResults() {
97        return mResultAdapter != null && mResultAdapter.hasResults();
98    }
99
100    public int getLastFilterType() {
101        return mResultAdapter != null ? mResultAdapter.getLastFilterType() : -1;
102    }
103
104    public String getLastFilterString() {
105        return mResultAdapter != null ? mResultAdapter.getLastFilterString() : null;
106    }
107
108    public int getLastFilterTime() {
109        return mResultAdapter != null ? mResultAdapter.getLastFilterType() : -1;
110    }
111
112    public boolean getHideFilterSearchOnStart() {
113        return mHideFilterSearchOnStart;
114    }
115
116    private void updateHint(int hintTextId, int imageDrawableId) {
117        String hintText = getResources().getString(hintTextId);
118        Drawable searchIcon = getResources().getDrawable(imageDrawableId);
119
120        SpannableStringBuilder ssb = new SpannableStringBuilder("   "); // for the icon
121        ssb.append(hintText);
122        int textSize = (int) (mAutoCompleteTextView.getTextSize() * 1.25);
123        searchIcon.setBounds(0, 0, textSize, textSize);
124        ssb.setSpan(new ImageSpan(searchIcon), 1, 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
125        mAutoCompleteTextView.setHint(ssb);
126    }
127
128    // Implementation of TextWatcher
129    @Override
130    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
131    }
132
133    // Implementation of TextWatcher
134    @Override
135    public void onTextChanged(CharSequence s, int start, int before, int count) {
136        if (mFirstTime && mHideFilterSearchOnStart) {
137            mFirstTime = false;
138            return;
139        }
140        filterOnString(s.toString());
141    }
142
143    // Implementation of TextWatcher
144    @Override
145    public void afterTextChanged(Editable s) {
146        if (mClearButton != null) {
147            mClearButton.setVisibility(s.length() > 0 ? View.VISIBLE : View.GONE);
148        }
149    }
150
151    @Override
152    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
153        // Hide the keyboard since the user explicitly selected an item.
154        InputMethodManager manager =
155                (InputMethodManager) getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
156        manager.hideSoftInputFromWindow(mAutoCompleteTextView.getWindowToken(), 0);
157        // An onClickListener for the view item because I haven't figured out a
158        // way to update the AutoCompleteTextView without causing an infinite loop.
159        mHideFilterSearchOnStart = true;
160        mFilterAdapter.onClick(view);
161    }
162
163    @Override
164    public void onClick(View v) {
165        if (mAutoCompleteTextView != null && !mAutoCompleteTextView.isPopupShowing()) {
166            filterOnString(mAutoCompleteTextView.getText().toString());
167        }
168    }
169
170    // This method will set the adapter if no adapter has been set.  The adapter is initialized
171    // here to prevent the drop-down from appearing uninvited on orientation change, as the
172    // AutoCompleteTextView.setText() will trigger the drop-down if the adapter has been set.
173    private void filterOnString(String string) {
174        if (mAutoCompleteTextView.getAdapter() == null) {
175            mAutoCompleteTextView.setAdapter(mFilterAdapter);
176        }
177        mHideFilterSearchOnStart = false;
178        mFilterAdapter.getFilter().filter(string);
179    }
180}
181