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.
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.
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/>.
18 package net.ktnx.mobileledger.ui.activity;
20 import android.content.Context;
21 import android.os.Bundle;
22 import android.renderscript.RSInvalidStateException;
23 import android.view.LayoutInflater;
24 import android.view.Menu;
25 import android.view.MenuInflater;
26 import android.view.View;
27 import android.view.ViewGroup;
29 import androidx.annotation.NonNull;
30 import androidx.annotation.Nullable;
31 import androidx.fragment.app.Fragment;
32 import androidx.fragment.app.FragmentActivity;
33 import androidx.lifecycle.ViewModelProvider;
34 import androidx.recyclerview.widget.ItemTouchHelper;
35 import androidx.recyclerview.widget.LinearLayoutManager;
36 import androidx.recyclerview.widget.RecyclerView;
38 import com.google.android.material.floatingactionbutton.FloatingActionButton;
39 import com.google.android.material.snackbar.Snackbar;
41 import net.ktnx.mobileledger.R;
42 import net.ktnx.mobileledger.model.Data;
43 import net.ktnx.mobileledger.model.LedgerTransaction;
44 import net.ktnx.mobileledger.model.LedgerTransactionAccount;
45 import net.ktnx.mobileledger.model.MobileLedgerProfile;
46 import net.ktnx.mobileledger.utils.Logger;
47 import net.ktnx.mobileledger.utils.Misc;
49 import org.jetbrains.annotations.NotNull;
51 import java.util.Date;
54 * A simple {@link Fragment} subclass.
55 * Activities that contain this fragment must implement the
56 * {@link OnNewTransactionFragmentInteractionListener} interface
57 * to handle interaction events.
60 // TODO: offer to undo account remove-on-swipe
62 public class NewTransactionFragment extends Fragment {
63 private NewTransactionItemsAdapter listAdapter;
64 private NewTransactionModel viewModel;
65 private RecyclerView list;
66 private FloatingActionButton fab;
67 private OnNewTransactionFragmentInteractionListener mListener;
68 private MobileLedgerProfile mProfile;
69 public NewTransactionFragment() {
70 // Required empty public constructor
71 setHasOptionsMenu(true);
74 public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {
75 super.onCreateOptionsMenu(menu, inflater);
76 inflater.inflate(R.menu.new_transaction_fragment, menu);
77 menu.findItem(R.id.action_reset_new_transaction_activity)
78 .setOnMenuItemClickListener(item -> {
84 public View onCreateView(LayoutInflater inflater, ViewGroup container,
85 Bundle savedInstanceState) {
86 // Inflate the layout for this fragment
87 return inflater.inflate(R.layout.fragment_new_transaction, container, false);
91 public void onActivityCreated(@Nullable Bundle savedInstanceState) {
92 super.onActivityCreated(savedInstanceState);
93 FragmentActivity activity = getActivity();
95 throw new RSInvalidStateException(
96 "getActivity() returned null within onActivityCreated()");
98 list = activity.findViewById(R.id.new_transaction_accounts);
99 viewModel = new ViewModelProvider(activity).get(NewTransactionModel.class);
100 mProfile = Data.profile.getValue();
101 listAdapter = new NewTransactionItemsAdapter(viewModel, mProfile);
102 list.setAdapter(listAdapter);
103 list.setLayoutManager(new LinearLayoutManager(activity));
104 Data.profile.observe(getViewLifecycleOwner(), profile -> {
106 listAdapter.setProfile(profile);
108 listAdapter.notifyDataSetChanged();
109 new ItemTouchHelper(new ItemTouchHelper.Callback() {
111 public int getMovementFlags(@NonNull RecyclerView recyclerView,
112 @NonNull RecyclerView.ViewHolder viewHolder) {
113 int flags = makeFlag(ItemTouchHelper.ACTION_STATE_IDLE, ItemTouchHelper.END);
114 // the top item is always there (date and description)
115 if (viewHolder.getAdapterPosition() > 0) {
116 if (viewModel.getAccountCount() > 2) {
117 flags |= makeFlag(ItemTouchHelper.ACTION_STATE_SWIPE,
118 ItemTouchHelper.START | ItemTouchHelper.END);
125 public boolean onMove(@NonNull RecyclerView recyclerView,
126 @NonNull RecyclerView.ViewHolder viewHolder,
127 @NonNull RecyclerView.ViewHolder target) {
131 public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
132 if (viewModel.getAccountCount() == 2)
133 Snackbar.make(list, R.string.msg_at_least_two_accounts_are_required,
134 Snackbar.LENGTH_LONG)
135 .setAction("Action", null)
138 int pos = viewHolder.getAdapterPosition();
139 viewModel.removeItem(pos - 1);
140 listAdapter.notifyItemRemoved(pos);
141 viewModel.sendCountNotifications(); // needed after items re-arrangement
142 viewModel.checkTransactionSubmittable(listAdapter);
145 }).attachToRecyclerView(list);
147 viewModel.isSubmittable()
148 .observe(getViewLifecycleOwner(), isSubmittable -> {
152 fab.setEnabled(true);
161 viewModel.checkTransactionSubmittable(listAdapter);
163 fab = activity.findViewById(R.id.fab);
164 fab.setOnClickListener(v -> onFabPressed());
166 boolean keep = false;
168 Bundle args = getArguments();
170 String error = args.getString("error");
172 Logger.debug("new-trans-f", String.format("Got error: %s", error));
173 Snackbar.make(list, error, Snackbar.LENGTH_LONG)
180 if (savedInstanceState != null) {
181 keep |= savedInstanceState.getBoolean("keep", true);
182 focused = savedInstanceState.getInt("focused", 0);
188 viewModel.setFocusedItem(focused);
192 public void onSaveInstanceState(@NonNull Bundle outState) {
193 super.onSaveInstanceState(outState);
194 outState.putBoolean("keep", true);
195 final int focusedItem = viewModel.getFocusedItem();
196 outState.putInt("focused", focusedItem);
198 private void onFabPressed() {
199 fab.setEnabled(false);
200 Misc.hideSoftKeyboard(this);
201 if (mListener != null) {
202 Date date = viewModel.getDate();
203 LedgerTransaction tr =
204 new LedgerTransaction(null, date, viewModel.getDescription(), mProfile);
206 LedgerTransactionAccount emptyAmountAccount = null;
207 float emptyAmountAccountBalance = 0;
208 for (int i = 0; i < viewModel.getAccountCount(); i++) {
209 LedgerTransactionAccount acc =
210 new LedgerTransactionAccount(viewModel.getAccount(i));
211 if (acc.getAccountName()
216 if (acc.isAmountSet()) {
217 emptyAmountAccountBalance += acc.getAmount();
220 emptyAmountAccount = acc;
226 if (emptyAmountAccount != null)
227 emptyAmountAccount.setAmount(-emptyAmountAccountBalance);
229 mListener.onTransactionSave(tr);
234 public void onAttach(@NotNull Context context) {
235 super.onAttach(context);
236 if (context instanceof OnNewTransactionFragmentInteractionListener) {
237 mListener = (OnNewTransactionFragmentInteractionListener) context;
240 throw new RuntimeException(
241 context.toString() + " must implement OnFragmentInteractionListener");
246 public void onDetach() {
252 * This interface must be implemented by activities that contain this
253 * fragment to allow an interaction in this fragment to be communicated
254 * to the activity and potentially other fragments contained in that
257 * See the Android Training lesson <a href=
258 * "http://developer.android.com/training/basics/fragments/communicating.html"
259 * >Communicating with Other Fragments</a> for more information.
261 public interface OnNewTransactionFragmentInteractionListener {
262 void onTransactionSave(LedgerTransaction tr);