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      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 
     17 package com.android.dialer.widget;
     18 
     19 import android.content.Context;
     20 import android.content.res.ColorStateList;
     21 import android.content.res.Resources.Theme;
     22 import android.support.annotation.ColorRes;
     23 import android.support.annotation.Nullable;
     24 import android.support.annotation.StringRes;
     25 import android.util.AttributeSet;
     26 import android.view.LayoutInflater;
     27 import android.view.View;
     28 import android.widget.ImageView;
     29 import android.widget.LinearLayout;
     30 import android.widget.TextView;
     31 
     32 public class EmptyContentView extends LinearLayout implements View.OnClickListener {
     33 
     34   /** Listener to call when action button is clicked. */
     35   public interface OnEmptyViewActionButtonClickedListener {
     36     void onEmptyViewActionButtonClicked();
     37   }
     38 
     39   public static final int NO_LABEL = 0;
     40   public static final int NO_IMAGE = 0;
     41 
     42   private ImageView imageView;
     43   private TextView descriptionView;
     44   private TextView actionView;
     45   private OnEmptyViewActionButtonClickedListener onActionButtonClickedListener;
     46 
     47   private @StringRes int actionLabel;
     48 
     49   public EmptyContentView(Context context) {
     50     this(context, null);
     51   }
     52 
     53   public EmptyContentView(Context context, AttributeSet attrs) {
     54     this(context, attrs, 0);
     55   }
     56 
     57   public EmptyContentView(Context context, AttributeSet attrs, int defStyleAttr) {
     58     this(context, attrs, defStyleAttr, 0);
     59   }
     60 
     61   public EmptyContentView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
     62     super(context, attrs, defStyleAttr, defStyleRes);
     63     inflateLayout();
     64 
     65     // Don't let touches fall through the empty view.
     66     setClickable(true);
     67     imageView = (ImageView) findViewById(R.id.empty_list_view_image);
     68     descriptionView = (TextView) findViewById(R.id.empty_list_view_message);
     69     actionView = (TextView) findViewById(R.id.empty_list_view_action);
     70     actionView.setOnClickListener(this);
     71   }
     72 
     73   public void setDescription(int resourceId) {
     74     if (resourceId == NO_LABEL) {
     75       descriptionView.setText(null);
     76       descriptionView.setVisibility(View.GONE);
     77     } else {
     78       descriptionView.setText(resourceId);
     79       descriptionView.setVisibility(View.VISIBLE);
     80     }
     81   }
     82 
     83   public void setImage(int resourceId) {
     84     if (resourceId == NO_LABEL) {
     85       imageView.setImageDrawable(null);
     86       imageView.setVisibility(View.GONE);
     87     } else {
     88       imageView.setImageResource(resourceId);
     89       imageView.setVisibility(View.VISIBLE);
     90     }
     91   }
     92 
     93   public void setImageTint(@ColorRes int color, @Nullable Theme theme) {
     94     imageView.setImageTintList(
     95         (ColorStateList.valueOf(getContext().getResources().getColor(color, theme))));
     96   }
     97 
     98   public void setActionLabel(@StringRes int resourceId) {
     99     actionLabel = resourceId;
    100     if (resourceId == NO_LABEL) {
    101       actionView.setText(null);
    102       actionView.setVisibility(View.GONE);
    103     } else {
    104       actionView.setText(resourceId);
    105       actionView.setVisibility(View.VISIBLE);
    106     }
    107   }
    108 
    109   public @StringRes int getActionLabel() {
    110     return actionLabel;
    111   }
    112 
    113   public boolean isShowingContent() {
    114     return imageView.getVisibility() == View.VISIBLE
    115         || descriptionView.getVisibility() == View.VISIBLE
    116         || actionView.getVisibility() == View.VISIBLE;
    117   }
    118 
    119   public void setActionClickedListener(OnEmptyViewActionButtonClickedListener listener) {
    120     onActionButtonClickedListener = listener;
    121   }
    122 
    123   @Override
    124   public void onClick(View v) {
    125     if (onActionButtonClickedListener != null) {
    126       onActionButtonClickedListener.onEmptyViewActionButtonClicked();
    127     }
    128   }
    129 
    130   protected void inflateLayout() {
    131     setOrientation(LinearLayout.VERTICAL);
    132     final LayoutInflater inflater =
    133         (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    134     inflater.inflate(R.layout.empty_content_view, this);
    135   }
    136 }
    137