SuperCollapsedBlock.java revision b334c9035e9b7a38766bb66c29da2208525d1e11 
1/*
2 * Copyright (C) 2012 Google Inc.
3 * Licensed to The Android Open Source Project.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 *      http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18package com.android.mail.browse;
19
20import android.content.Context;
21import android.content.res.Resources;
22import android.graphics.Shader.TileMode;
23import android.graphics.drawable.BitmapDrawable;
24import android.util.AttributeSet;
25import android.view.View;
26import android.widget.FrameLayout;
27import android.widget.TextView;
28
29import com.android.mail.R;
30import com.android.mail.browse.ConversationViewAdapter.SuperCollapsedBlockItem;
31import com.android.mail.utils.LogTag;
32import com.android.mail.utils.LogUtils;
33
34/**
35 * A header block that expands to a list of collapsed message headers. Will notify a listener on tap
36 * so the listener can hide the block and reveal the corresponding collapsed message headers.
37 *
38 */
39public class SuperCollapsedBlock extends FrameLayout implements View.OnClickListener,
40        HeaderBlock {
41
42    public interface OnClickListener {
43        /**
44         * Handle a click on a super-collapsed block.
45         *
46         */
47        void onSuperCollapsedClick(SuperCollapsedBlockItem item);
48    }
49
50    private SuperCollapsedBlockItem mModel;
51    private OnClickListener mClick;
52    private View mIconView;
53    private TextView mCountView;
54    private View mBackgroundView;
55
56    private static final String LOG_TAG = LogTag.getLogTag();
57
58    public SuperCollapsedBlock(Context context) {
59        this(context, null);
60    }
61
62    public SuperCollapsedBlock(Context context, AttributeSet attrs) {
63        super(context, attrs);
64        setActivated(false);
65        setOnClickListener(this);
66    }
67
68    public void initialize(OnClickListener onClick) {
69        mClick = onClick;
70    }
71
72    @Override
73    protected void onFinishInflate() {
74        super.onFinishInflate();
75
76        mIconView = findViewById(R.id.super_collapsed_icon);
77        mCountView = (TextView) findViewById(R.id.super_collapsed_count);
78        mBackgroundView = findViewById(R.id.super_collapsed_background);
79
80        // Work around Honeycomb bug where BitmapDrawable's tileMode is unreliable in XML (5160739)
81        BitmapDrawable bd = (BitmapDrawable) getResources().getDrawable(
82                R.drawable.header_convo_view_thread_bg_holo);
83        bd.setTileModeXY(TileMode.REPEAT, TileMode.REPEAT);
84        mBackgroundView.setBackgroundDrawable(bd);
85    }
86
87    public void bind(SuperCollapsedBlockItem item) {
88        mModel = item;
89        setCount(item.getEnd() - item.getStart() + 1);
90    }
91
92    public void setCount(int count) {
93        mCountView.setText(Integer.toString(count));
94        mIconView.getBackground().setLevel(count);
95    }
96
97    @Override
98    public void onClick(final View v) {
99        ((TextView) findViewById(R.id.super_collapsed_label)).setText(
100                R.string.loading_conversation);
101        mCountView.setVisibility(GONE);
102
103        if (mClick != null) {
104            getHandler().post(new Runnable() {
105                @Override
106                public void run() {
107                    mClick.onSuperCollapsedClick(mModel);
108                }
109            });
110        }
111    }
112
113    public static int getCannedHeight(Context context) {
114        Resources r = context.getResources();
115        // Rather than try to measure the height a super-collapsed block, just add up the known
116        // vertical dimension components.
117        return r.getDimensionPixelSize(R.dimen.super_collapsed_height)
118                + r.getDimensionPixelOffset(R.dimen.message_header_vertical_margin);
119    }
120
121    @Override
122    public boolean canSnap() {
123        return false;
124    }
125
126    @Override
127    public MessageHeaderView getSnapView() {
128        return null;
129    }
130
131    @Override
132    public void setMarginBottom(int height) {
133        // no-op. should never have a matching body.
134
135        // sanity check
136        if (height != 0) {
137            LogUtils.d(LOG_TAG, "super-collapsed block yielded unexpected body height: %d", height);
138        }
139    }
140
141    @Override
142    public void updateContactInfo() {
143        // no-op
144    }
145
146    @Override
147    public void setStarDisplay(boolean starred) {
148        // no-op
149    }
150
151}
152