1 /*
2  * Copyright (C) 2015 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 package com.android.messaging.ui;
17 
18 import android.content.Context;
19 import android.util.AttributeSet;
20 import android.view.Gravity;
21 import android.widget.ImageView;
22 import android.widget.LinearLayout;
23 import android.widget.LinearLayout.LayoutParams;
24 import android.widget.TextView;
25 
26 import com.android.messaging.R;
27 
28 /**
29  * A common reusable view that shows a hint image and text for an empty list view.
30  */
31 public class ListEmptyView extends LinearLayout {
32     private ImageView mEmptyImageHint;
33     private TextView mEmptyTextHint;
34 
ListEmptyView(final Context context, final AttributeSet attrs)35     public ListEmptyView(final Context context, final AttributeSet attrs) {
36         super(context, attrs);
37     }
38 
39     @Override
onFinishInflate()40     protected void onFinishInflate() {
41         super.onFinishInflate();
42 
43         mEmptyImageHint = (ImageView) findViewById(R.id.empty_image_hint);
44         mEmptyTextHint = (TextView) findViewById(R.id.empty_text_hint);
45     }
46 
setImageHint(final int resId)47     public void setImageHint(final int resId) {
48         mEmptyImageHint.setImageResource(resId);
49     }
50 
setTextHint(final int resId)51     public void setTextHint(final int resId) {
52         mEmptyTextHint.setText(getResources().getText(resId));
53     }
54 
setTextHint(final CharSequence hintText)55     public void setTextHint(final CharSequence hintText) {
56         mEmptyTextHint.setText(hintText);
57     }
58 
setIsImageVisible(final boolean isImageVisible)59     public void setIsImageVisible(final boolean isImageVisible) {
60         mEmptyImageHint.setVisibility(isImageVisible ? VISIBLE : GONE);
61     }
62 
setIsVerticallyCentered(final boolean isVerticallyCentered)63     public void setIsVerticallyCentered(final boolean isVerticallyCentered) {
64         int gravity =
65                 isVerticallyCentered ? Gravity.CENTER : Gravity.TOP | Gravity.CENTER_HORIZONTAL;
66         ((LinearLayout.LayoutParams) mEmptyImageHint.getLayoutParams()).gravity = gravity;
67         ((LinearLayout.LayoutParams) mEmptyTextHint.getLayoutParams()).gravity = gravity;
68         getLayoutParams().height =
69                 isVerticallyCentered ? LayoutParams.WRAP_CONTENT : LayoutParams.MATCH_PARENT;
70         requestLayout();
71     }
72 }
73