pave the way to fragment navigation for pattern list activity

[mobile-ledger.git] / app / src / main / java / net / ktnx / mobileledger / ui / patterns / PatternListFragment.java

diff --git a/app/src/main/java/net/ktnx/mobileledger/ui/patterns/PatternListFragment.java b/app/src/main/java/net/ktnx/mobileledger/ui/patterns/PatternListFragment.java
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+++ b/app/src/main/java/net/ktnx/mobileledger/ui/patterns/PatternListFragment.java
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+/*
+ * Copyright © 2021 Damyan Ivanov.
+ * This file is part of MoLe.
+ * MoLe is free software: you can distribute it and/or modify it
+ * under the term of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your opinion), any later version.
+ *
+ * MoLe is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License terms for details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package net.ktnx.mobileledger.ui.patterns;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.Lifecycle;
+import androidx.lifecycle.LifecycleEventObserver;
+import androidx.lifecycle.LifecycleOwner;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import net.ktnx.mobileledger.R;
+import net.ktnx.mobileledger.databinding.FragmentPatternListBinding;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * A simple {@link Fragment} subclass.
+ * Use the {@link PatternListFragment#newInstance} factory method to
+ * create an instance of this fragment.
+ */
+public class PatternListFragment extends Fragment {
+    private FragmentPatternListBinding b;
+    private OnPatternListFragmentInteractionListener mListener;
+
+    public PatternListFragment() {
+        // Required empty public constructor
+    }
+    /**
+     * Use this factory method to create a new instance of
+     * this fragment using the provided parameters.
+     *
+     * @return A new instance of fragment PatternListFragment.
+     */
+    // TODO: Rename and change types and number of parameters
+    public static PatternListFragment newInstance() {
+        PatternListFragment fragment = new PatternListFragment();
+        Bundle args = new Bundle();
+        fragment.setArguments(args);
+        return fragment;
+    }
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+//        if (getArguments() != null) {
+//            mParam1 = getArguments().getString(ARG_PARAM1);
+//            mParam2 = getArguments().getString(ARG_PARAM2);
+//        }
+    }
+
+    @Override
+    public View onCreateView(@NotNull LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        b = FragmentPatternListBinding.inflate(inflater);
+
+        b.toolbarLayout.setTitle(getString(R.string.title_activity_patterns));
+
+        b.fab.setOnClickListener(this::fabClicked);
+
+        PatternsRecyclerViewAdapter modelAdapter = new PatternsRecyclerViewAdapter();
+
+        b.patternList.setAdapter(modelAdapter);
+        PatternsModel.retrievePatterns(modelAdapter);
+        LinearLayoutManager llm = new LinearLayoutManager(getContext());
+        llm.setOrientation(RecyclerView.VERTICAL);
+        b.patternList.setLayoutManager(llm);
+        return b.getRoot();
+    }
+    @Override
+    public void onAttach(@NonNull Context context) {
+        super.onAttach(context);
+        if (context instanceof OnPatternListFragmentInteractionListener) {
+            mListener = (OnPatternListFragmentInteractionListener) context;
+        }
+        else {
+            throw new RuntimeException(
+                    context.toString() + " must implement OnFragmentInteractionListener");
+        }
+
+        final LifecycleEventObserver observer = new LifecycleEventObserver() {
+            @Override
+            public void onStateChanged(@NonNull LifecycleOwner source,
+                                       @NonNull Lifecycle.Event event) {
+                if (event.getTargetState() == Lifecycle.State.CREATED) {
+//                    getActivity().setActionBar(b.toolbar);
+                    getLifecycle().removeObserver(this);
+                }
+            }
+        };
+        getLifecycle().addObserver(observer);
+    }
+    private void fabClicked(View view) {
+        if (mListener == null)
+            return;
+
+        mListener.onNewPattern();
+    }
+    /**
+     * This interface must be implemented by activities that contain this
+     * fragment to allow an interaction in this fragment to be communicated
+     * to the activity and potentially other fragments contained in that
+     * activity.
+     * <p>
+     * See the Android Training lesson <a href=
+     * "http://developer.android.com/training/basics/fragments/communicating.html"
+     * >Communicating with Other Fragments</a> for more information.
+     */
+    public interface OnPatternListFragmentInteractionListener {
+        void onNewPattern();
+
+        void onEditPattern(int id);
+    }
+}
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