Adds edit sense fragment.

app/src/main/java/com/majinnaibu/monstercards/ui/editmonster/EditSenseFragment.java

@@ -0,0 +1,77 @@
+package com.majinnaibu.monstercards.ui.editmonster;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.EditText;
+
+import androidx.activity.OnBackPressedCallback;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.lifecycle.ViewModelProvider;
+import androidx.navigation.NavBackStackEntry;
+import androidx.navigation.NavController;
+import androidx.navigation.Navigation;
+
+import com.majinnaibu.monstercards.R;
+import com.majinnaibu.monstercards.ui.MCFragment;
+import com.majinnaibu.monstercards.utils.Logger;
+import com.majinnaibu.monstercards.utils.TextChangedListener;
+
+public class EditSenseFragment extends MCFragment {
+    private EditMonsterViewModel mEditMonsterViewModel;
+    private EditSenseViewModel mViewModel;
+    private ViewHolder mHolder;
+    private String mOldSense;
+
+    @Override
+    public void onCreate(@Nullable @org.jetbrains.annotations.Nullable Bundle savedInstanceState) {
+        mViewModel = new ViewModelProvider(this).get(EditSenseViewModel.class);
+        if (getArguments() != null) {
+            EditSenseFragmentArgs args = EditSenseFragmentArgs.fromBundle(getArguments());
+            mOldSense = args.getSense();
+            mViewModel.copyFromSense(mOldSense);
+        } else {
+            Logger.logWTF("This should never happen. EditSenseFragment needs arguments");
+            mOldSense = null;
+        }
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
+                             @Nullable Bundle savedInstanceState) {
+        NavController navController = Navigation.findNavController(requireActivity(), R.id.nav_host_fragment);
+        NavBackStackEntry backStackEntry = navController.getBackStackEntry(R.id.edit_monster_navigation);
+        mEditMonsterViewModel = new ViewModelProvider(backStackEntry).get(EditMonsterViewModel.class);
+
+        View root = inflater.inflate(R.layout.fragment_edit_sense, container, false);
+
+        mHolder = new ViewHolder(root);
+
+        mHolder.description.setText(mViewModel.getDescription().getValue());
+        mHolder.description.addTextChangedListener(new TextChangedListener((TextChangedListener.OnTextChangedCallback) (s, start, before, count) -> mViewModel.setDescription(s.toString())));
+
+        requireActivity().getOnBackPressedDispatcher().addCallback(getViewLifecycleOwner(), new OnBackPressedCallback(true) {
+            @Override
+            public void handleOnBackPressed() {
+                if (mViewModel.hasChanges()) {
+                    mEditMonsterViewModel.replaceSense(mViewModel.getDescription().getValue(), mOldSense);
+                }
+                Navigation.findNavController(requireView()).navigateUp();
+            }
+        });
+
+        return root;
+    }
+
+    private static class ViewHolder {
+        EditText description;
+
+        ViewHolder(View root) {
+            description = root.findViewById(R.id.name);
+        }
+    }
+
+}

app/src/main/java/com/majinnaibu/monstercards/ui/editmonster/EditSenseViewModel.java

@@ -0,0 +1,35 @@
+package com.majinnaibu.monstercards.ui.editmonster;
+
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModel;
+
+import com.majinnaibu.monstercards.utils.ChangeTrackedLiveData;
+
+public class EditSenseViewModel extends ViewModel {
+    private final ChangeTrackedLiveData<String> mDescription;
+    private final MutableLiveData<Boolean> mHasChanges;
+
+    public EditSenseViewModel() {
+        mHasChanges = new MutableLiveData<>(false);
+        ChangeTrackedLiveData.OnValueDirtiedCallback onDirtied = () -> mHasChanges.setValue(true);
+        mDescription = new ChangeTrackedLiveData<>("", onDirtied);
+    }
+
+    public void copyFromSense(String sense) {
+        mDescription.resetValue(sense);
+    }
+
+    public LiveData<String> getDescription() {
+        return mDescription;
+    }
+
+    public void setDescription(String description) {
+        mDescription.setValue(description);
+    }
+
+    public boolean hasChanges() {
+        Boolean value = mHasChanges.getValue();
+        return value != null && value;
+    }
+}

app/src/main/java/com/majinnaibu/monstercards/ui/editmonster/EditSensesFragment.java

@@ -10,6 +10,7 @@ import androidx.annotation.NonNull;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.navigation.NavBackStackEntry;
 import androidx.navigation.NavController;
+import androidx.navigation.NavDirections;
 import androidx.navigation.Navigation;
 import androidx.recyclerview.widget.DividerItemDecoration;
 import androidx.recyclerview.widget.ItemTouchHelper;
@@ -31,11 +32,10 @@ public class EditSensesFragment extends MCFragment {
     private ViewHolder mHolder;
 
     private void navigateToEditSense(String sense) {
-        Logger.logUnimplementedFeature("Navigate to edit sense fragment.");
-//        NavDirections action = EditSensesFragmentDirections.actionEditSensesFragmentToEditSenseFragment(sense);
-//        View view = getView();
-//        assert view != null;
-//        Navigation.findNavController(view).navigate(action);
+        NavDirections action = EditSensesFragmentDirections.actionEditSensesFragmentToEditSenseFragment(sense);
+        View view = getView();
+        assert view != null;
+        Navigation.findNavController(view).navigate(action);
     }
 
     @Override