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

   1 /*
   2  * Copyright © 2020 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 androidx.lifecycle.LifecycleOwner;
  21 import androidx.lifecycle.MutableLiveData;
  22 import androidx.lifecycle.Observer;
  23 import androidx.lifecycle.ViewModel;
  24
  25 import net.ktnx.mobileledger.model.Currency;
  26
  27 import java.util.ArrayList;
  28 import java.util.List;
  29
  30 public class CurrencySelectorModel extends ViewModel {
  31     public final MutableLiveData<List<Currency>> currencies;
  32     private final MutableLiveData<Boolean> positionAndPaddingVisible = new MutableLiveData<>(true);
  33     private OnCurrencySelectedListener selectionListener;
  34     public CurrencySelectorModel() {
  35         this.currencies = new MutableLiveData<>(new ArrayList<>());
  36     }
  37     public void showPositionAndPadding() {
  38         positionAndPaddingVisible.postValue(true);
  39     }
  40     public void hidePositionAndPadding() {
  41         positionAndPaddingVisible.postValue(false);
  42     }
  43     public void observePositionAndPaddingVisible(LifecycleOwner activity,
  44                                                  Observer<Boolean> observer) {
  45         positionAndPaddingVisible.observe(activity, observer);
  46     }
  47     void setOnCurrencySelectedListener(OnCurrencySelectedListener listener) {
  48         selectionListener = listener;
  49     }
  50     void resetOnCurrencySelectedListener() {
  51         selectionListener = null;
  52     }
  53     void triggerOnCurrencySelectedListener(Currency c) {
  54         if (selectionListener != null)
  55             selectionListener.onCurrencySelected(c);
  56     }
  57 }