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.ViewModelProviders;
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.
59 public class NewTransactionFragment extends Fragment {
60 private NewTransactionItemsAdapter listAdapter;
61 private NewTransactionModel viewModel;
62 private RecyclerView list;
63 private FloatingActionButton fab;
64 private OnNewTransactionFragmentInteractionListener mListener;
65 private MobileLedgerProfile mProfile;
66 public NewTransactionFragment() {
67 // Required empty public constructor
68 setHasOptionsMenu(true);
71 public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {
72 super.onCreateOptionsMenu(menu, inflater);
73 inflater.inflate(R.menu.new_transaction_fragment, menu);
74 menu.findItem(R.id.action_reset_new_transaction_activity)
75 .setOnMenuItemClickListener(item -> {
81 public View onCreateView(LayoutInflater inflater, ViewGroup container,
82 Bundle savedInstanceState) {
83 // Inflate the layout for this fragment
84 return inflater.inflate(R.layout.fragment_new_transaction, container, false);
88 public void onActivityCreated(@Nullable Bundle savedInstanceState) {
89 super.onActivityCreated(savedInstanceState);
90 FragmentActivity activity = getActivity();
92 throw new RSInvalidStateException(
93 "getActivity() returned null within onActivityCreated()");
95 list = activity.findViewById(R.id.new_transaction_accounts);
96 viewModel = ViewModelProviders.of(activity)
97 .get(NewTransactionModel.class);
98 mProfile = Data.profile.getValue();
99 listAdapter = new NewTransactionItemsAdapter(viewModel, mProfile);
100 list.setAdapter(listAdapter);
101 list.setLayoutManager(new LinearLayoutManager(activity));
102 Data.profile.observe(this, profile -> {
104 listAdapter.setProfile(profile);
106 listAdapter.notifyDataSetChanged();
107 new ItemTouchHelper(new ItemTouchHelper.Callback() {
109 public int getMovementFlags(@NonNull RecyclerView recyclerView,
110 @NonNull RecyclerView.ViewHolder viewHolder) {
111 int flags = makeFlag(ItemTouchHelper.ACTION_STATE_IDLE, ItemTouchHelper.END);
112 // the top item is always there (date and description)
113 if (viewHolder.getAdapterPosition() > 0) {
114 if (viewModel.getAccountCount() > 2) {
115 flags |= makeFlag(ItemTouchHelper.ACTION_STATE_SWIPE,
116 ItemTouchHelper.START | ItemTouchHelper.END);
123 public boolean onMove(@NonNull RecyclerView recyclerView,
124 @NonNull RecyclerView.ViewHolder viewHolder,
125 @NonNull RecyclerView.ViewHolder target) {
129 public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
130 if (viewModel.getAccountCount() == 2)
131 Snackbar.make(list, R.string.msg_at_least_two_accounts_are_required,
132 Snackbar.LENGTH_LONG)
133 .setAction("Action", null)
136 int pos = viewHolder.getAdapterPosition();
137 viewModel.removeItem(pos - 1);
138 listAdapter.notifyItemRemoved(pos);
139 viewModel.sendCountNotifications(); // needed after items re-arrangement
140 viewModel.checkTransactionSubmittable(listAdapter);
143 }).attachToRecyclerView(list);
145 viewModel.isSubmittable()
146 .observe(this, isSubmittable -> {
150 fab.setEnabled(true);
159 viewModel.checkTransactionSubmittable(listAdapter);
161 fab = activity.findViewById(R.id.fab);
162 fab.setOnClickListener(v -> onFabPressed());
164 boolean keep = false;
166 Bundle args = getArguments();
168 String error = args.getString("error");
170 // TODO display error
171 Logger.debug("new-trans-f", String.format("Got error: %s", error));
172 Snackbar.make(list, error, Snackbar.LENGTH_LONG)
179 if (savedInstanceState != null) {
180 keep |= savedInstanceState.getBoolean("keep", true);
181 focused = savedInstanceState.getInt("focused", 0);
187 viewModel.setFocusedItem(focused);
191 public void onSaveInstanceState(@NonNull Bundle outState) {
192 super.onSaveInstanceState(outState);
193 outState.putBoolean("keep", true);
194 final int focusedItem = viewModel.getFocusedItem();
195 outState.putInt("focused", focusedItem);
197 private void onFabPressed() {
198 fab.setEnabled(false);
199 Misc.hideSoftKeyboard(this);
200 if (mListener != null) {
201 Date date = viewModel.getDate();
202 LedgerTransaction tr =
203 new LedgerTransaction(null, date, viewModel.getDescription(), mProfile);
205 LedgerTransactionAccount emptyAmountAccount = null;
206 float emptyAmountAccountBalance = 0;
207 for (int i = 0; i < viewModel.getAccountCount(); i++) {
208 LedgerTransactionAccount acc =
209 new LedgerTransactionAccount(viewModel.getAccount(i));
210 if (acc.getAccountName()
215 if (acc.isAmountSet()) {
216 emptyAmountAccountBalance += acc.getAmount();
219 emptyAmountAccount = acc;
225 if (emptyAmountAccount != null)
226 emptyAmountAccount.setAmount(-emptyAmountAccountBalance);
228 mListener.onTransactionSave(tr);
233 public void onAttach(@NotNull Context context) {
234 super.onAttach(context);
235 if (context instanceof OnNewTransactionFragmentInteractionListener) {
236 mListener = (OnNewTransactionFragmentInteractionListener) context;
239 throw new RuntimeException(
240 context.toString() + " must implement OnFragmentInteractionListener");
245 public void onDetach() {
251 * This interface must be implemented by activities that contain this
252 * fragment to allow an interaction in this fragment to be communicated
253 * to the activity and potentially other fragments contained in that
256 * See the Android Training lesson <a href=
257 * "http://developer.android.com/training/basics/fragments/communicating.html"
258 * >Communicating with Other Fragments</a> for more information.
260 public interface OnNewTransactionFragmentInteractionListener {
261 void onTransactionSave(LedgerTransaction tr);