SuggestionsView.java revision dbdffd8316e75bc2813dbbcbef13d357970e8c84 
1/*
2 * Copyright (C) 2009 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.quicksearchbox.ui;
18
19import com.android.quicksearchbox.SuggestionPosition;
20
21import android.content.Context;
22import android.util.AttributeSet;
23import android.util.Log;
24import android.view.MotionEvent;
25import android.view.View;
26import android.widget.AdapterView;
27import android.widget.ListView;
28
29/**
30 * Holds a list of suggestions.
31 */
32public class SuggestionsView extends ListView {
33
34    private static final boolean DBG = true;
35    private static final String TAG = "QSB.SuggestionsView";
36
37    private SuggestionClickListener mSuggestionClickListener;
38
39    private SuggestionSelectionListener mSuggestionSelectionListener;
40
41    private InteractionListener mInteractionListener;
42
43    public SuggestionsView(Context context, AttributeSet attrs) {
44        super(context, attrs);
45    }
46
47    @Override
48    public void onFinishInflate() {
49        super.onFinishInflate();
50        setOnItemClickListener(new ItemClickListener());
51        setOnItemLongClickListener(new ItemLongClickListener());
52        setOnItemSelectedListener(new ItemSelectedListener());
53    }
54
55    public void setSuggestionClickListener(SuggestionClickListener listener) {
56        mSuggestionClickListener = listener;
57    }
58
59    public void setSuggestionSelectionListener(SuggestionSelectionListener listener) {
60        mSuggestionSelectionListener = listener;
61    }
62
63    public void setInteractionListener(InteractionListener listener) {
64        mInteractionListener = listener;
65    }
66
67    /**
68     * Gets the position of the selected suggestion.
69     *
70     * @return A 0-based index, or {@code -1} if no suggestion is selected.
71     */
72    public int getSelectedPosition() {
73        return getSelectedItemPosition();
74    }
75
76    /**
77     * Gets the selected suggestion.
78     *
79     * @return {@code null} if no suggestion is selected.
80     */
81    public SuggestionPosition getSelectedSuggestion() {
82        return (SuggestionPosition) getSelectedItem();
83    }
84
85    @Override
86    public boolean onInterceptTouchEvent(MotionEvent event) {
87        if (event.getAction() == MotionEvent.ACTION_DOWN && mInteractionListener != null) {
88            mInteractionListener.onInteraction();
89        }
90        return super.onInterceptTouchEvent(event);
91    }
92
93    public interface InteractionListener {
94        /**
95         * Called when the user interacts with this view.
96         */
97        void onInteraction();
98    }
99
100    private class ItemClickListener implements AdapterView.OnItemClickListener {
101        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
102            if (DBG) Log.d(TAG, "onItemClick(" + position + ")");
103            SuggestionView suggestionView = (SuggestionView) view;
104            if (mSuggestionClickListener != null) {
105                mSuggestionClickListener.onSuggestionClicked(position);
106            }
107        }
108    }
109
110    private class ItemLongClickListener implements AdapterView.OnItemLongClickListener {
111        public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
112            if (DBG) Log.d(TAG, "onItemLongClick(" + position + ")");
113            SuggestionView suggestionView = (SuggestionView) view;
114            if (mSuggestionClickListener != null) {
115                return mSuggestionClickListener.onSuggestionLongClicked(position);
116            }
117            return false;
118        }
119    }
120
121    private class ItemSelectedListener implements AdapterView.OnItemSelectedListener {
122        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
123            if (DBG) Log.d(TAG, "onItemSelected(" + position + ")");
124            SuggestionView suggestionView = (SuggestionView) view;
125            if (mSuggestionSelectionListener != null) {
126                mSuggestionSelectionListener.onSuggestionSelected(position);
127            }
128        }
129
130        public void onNothingSelected(AdapterView<?> parent) {
131            if (DBG) Log.d(TAG, "onNothingSelected()");
132            if (mSuggestionSelectionListener != null) {
133                mSuggestionSelectionListener.onNothingSelected();
134            }
135        }
136    }
137}
138