app/src/main/java/net/ktnx/mobileledger/ui/CurrencySelectorRecyclerViewAdapter.java

   1 /*
   2  * Copyright © 2019 Damyan Ivanov.
   3  * This file is part of MoLe.
   4  * MoLe is free software: you can distribute it and/or modify it
   5  * under the term of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your opinion), any later version.
   8  *
   9  * MoLe is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License terms for details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.ktnx.mobileledger.ui;
  19
  20 import android.view.LayoutInflater;
  21 import android.view.View;
  22 import android.view.ViewGroup;
  23 import android.widget.TextView;
  24
  25 import androidx.annotation.NonNull;
  26 import androidx.recyclerview.widget.DiffUtil;
  27 import androidx.recyclerview.widget.ListAdapter;
  28 import androidx.recyclerview.widget.RecyclerView;
  29
  30 import net.ktnx.mobileledger.R;
  31 import net.ktnx.mobileledger.model.Currency;
  32
  33 import org.jetbrains.annotations.NotNull;
  34
  35 /**
  36  * {@link RecyclerView.Adapter} that can display a {@link Currency} and makes a call to the
  37  * specified {@link OnCurrencySelectedListener}.
  38  */
  39 public class CurrencySelectorRecyclerViewAdapter
  40         extends ListAdapter<String, CurrencySelectorRecyclerViewAdapter.ViewHolder> {
  41     private static final DiffUtil.ItemCallback<String> DIFF_CALLBACK =
  42             new DiffUtil.ItemCallback<String>() {
  43                 @Override
  44                 public boolean areItemsTheSame(@NonNull String oldItem, @NonNull String newItem) {
  45                     return oldItem.equals(newItem);
  46                 }
  47                 @Override
  48                 public boolean areContentsTheSame(@NonNull String oldItem,
  49                                                   @NonNull String newItem) {
  50                     return true;
  51                 }
  52             };
  53
  54     private OnCurrencySelectedListener currencySelectedListener;
  55     private OnCurrencyLongClickListener currencyLongClickListener;
  56     public CurrencySelectorRecyclerViewAdapter() {
  57         super(DIFF_CALLBACK);
  58     }
  59     @NotNull
  60     @Override
  61     public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
  62         View view = LayoutInflater.from(parent.getContext())
  63                                   .inflate(R.layout.fragment_currency_selector, parent, false);
  64         return new ViewHolder(view);
  65     }
  66
  67     @Override
  68     public void onBindViewHolder(final ViewHolder holder, int position) {
  69         holder.bindTo(getItem(position));
  70     }
  71     public void setCurrencySelectedListener(OnCurrencySelectedListener listener) {
  72         this.currencySelectedListener = listener;
  73     }
  74     public void resetCurrencySelectedListener() {
  75         currencySelectedListener = null;
  76     }
  77     public void notifyCurrencySelected(String currency) {
  78         if (null != currencySelectedListener)
  79             currencySelectedListener.onCurrencySelected(currency);
  80     }
  81     public void setCurrencyLongClickListener(OnCurrencyLongClickListener listener) {
  82         this.currencyLongClickListener = listener;
  83     }
  84     public void resetCurrencyLockClickListener() { currencyLongClickListener = null; }
  85     private void notifyCurrencyLongClicked(String mItem) {
  86         if (null != currencyLongClickListener)
  87             currencyLongClickListener.onCurrencyLongClick(mItem);
  88     }
  89
  90     public class ViewHolder extends RecyclerView.ViewHolder {
  91         private final TextView mNameView;
  92         private String mItem;
  93
  94         ViewHolder(View view) {
  95             super(view);
  96             mNameView = view.findViewById(R.id.content);
  97
  98             view.setOnClickListener(v -> notifyCurrencySelected(mItem));
  99             view.setOnLongClickListener(v -> {
 100                 notifyCurrencyLongClicked(mItem);
 101                 return false;
 102             });
 103         }
 104
 105         @NotNull
 106         @Override
 107         public String toString() {
 108             return super.toString() + " '" + mNameView.getText() + "'";
 109         }
 110         void bindTo(String item) {
 111             mItem = item;
 112             mNameView.setText(item);
 113         }
 114     }
 115 }