TimeZonePickerView.java revision b064db0d1a7ffcedddd691b35d57e2cdb0268883 
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.widget.AdapterView;
30import android.widget.AdapterView.OnItemClickListener;
31import android.widget.AutoCompleteTextView;
32import android.widget.ImageButton;
33import android.widget.LinearLayout;
34import android.widget.ListView;
35
36public class TimeZonePickerView extends LinearLayout implements TextWatcher, OnItemClickListener {
37    private static final String TAG = "TimeZonePickerView";
38
39    private Context mContext;
40    private AutoCompleteTextView mAutoCompleteTextView;
41    private TimeZoneFilterTypeAdapter mFilterAdapter;
42    TimeZoneResultAdapter mResultAdapter;
43
44    private ImageButton mClearButton;
45
46    public interface OnTimeZoneSetListener {
47        void onTimeZoneSet(TimeZoneInfo tzi);
48    }
49
50    public TimeZonePickerView(Context context, AttributeSet attrs,
51            String timeZone, long timeMillis, OnTimeZoneSetListener l) {
52        super(context, attrs);
53        mContext = context;
54        LayoutInflater inflater = (LayoutInflater) context.getSystemService(
55                Context.LAYOUT_INFLATER_SERVICE);
56        inflater.inflate(R.layout.timezonepickerview, this, true);
57
58        TimeZoneData tzd = new TimeZoneData(mContext, timeZone, timeMillis);
59
60        mResultAdapter = new TimeZoneResultAdapter(mContext, tzd, l);
61        ListView timeZoneList = (ListView) findViewById(R.id.timezonelist);
62        timeZoneList.setAdapter(mResultAdapter);
63        timeZoneList.setOnItemClickListener(mResultAdapter);
64
65        mAutoCompleteTextView = (AutoCompleteTextView) findViewById(R.id.searchBox);
66        mFilterAdapter = new TimeZoneFilterTypeAdapter(mContext, tzd, mResultAdapter);
67        mAutoCompleteTextView.setAdapter(mFilterAdapter);
68        mAutoCompleteTextView.addTextChangedListener(this);
69        mAutoCompleteTextView.setOnItemClickListener(this);
70
71        updateHint(R.string.hint_time_zone_search, R.drawable.ic_search_holo_light);
72        mClearButton = (ImageButton) findViewById(R.id.clear_search);
73        mClearButton.setOnClickListener(new OnClickListener() {
74            @Override
75            public void onClick(View v) {
76                mAutoCompleteTextView.getEditableText().clear();
77            }
78        });
79    }
80
81    private void updateHint(int hintTextId, int imageDrawableId) {
82        String hintText = getResources().getString(hintTextId);
83        Drawable searchIcon = getResources().getDrawable(imageDrawableId);
84
85        SpannableStringBuilder ssb = new SpannableStringBuilder("   "); // for the icon
86        ssb.append(hintText);
87        int textSize = (int) (mAutoCompleteTextView.getTextSize() * 1.25);
88        searchIcon.setBounds(0, 0, textSize, textSize);
89        ssb.setSpan(new ImageSpan(searchIcon), 1, 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
90        mAutoCompleteTextView.setHint(ssb);
91    }
92
93    // Implementation of TextWatcher
94    @Override
95    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
96    }
97
98    // Implementation of TextWatcher
99    @Override
100    public void onTextChanged(CharSequence s, int start, int before, int count) {
101        mFilterAdapter.getFilter().filter(s.toString());
102    }
103
104    // Implementation of TextWatcher
105    @Override
106    public void afterTextChanged(Editable s) {
107        if (mClearButton != null) {
108            mClearButton.setVisibility(s.length() > 0 ? View.VISIBLE : View.GONE);
109        }
110    }
111
112    @Override
113    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
114        // An onClickListener for the view item because I haven't figured out a
115        // way to update the AutoCompleteTextView without causing an infinite loop.
116        mFilterAdapter.onClick(view);
117    }
118}
119