add functional currency selector when entering new transactions

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

diff --git a/app/src/main/java/net/ktnx/mobileledger/ui/CurrencySelectorRecyclerViewAdapter.java b/app/src/main/java/net/ktnx/mobileledger/ui/CurrencySelectorRecyclerViewAdapter.java
new file mode 100644 (file)
index 0000000..b7d90a3
--- /dev/null
+++ b/app/src/main/java/net/ktnx/mobileledger/ui/CurrencySelectorRecyclerViewAdapter.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright © 2019 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;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.recyclerview.widget.ListAdapter;
+import androidx.recyclerview.widget.RecyclerView;
+
+import net.ktnx.mobileledger.R;
+import net.ktnx.mobileledger.model.Currency;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * {@link RecyclerView.Adapter} that can display a {@link Currency} and makes a call to the
+ * specified {@link OnCurrencySelectedListener}.
+ */
+public class CurrencySelectorRecyclerViewAdapter
+        extends ListAdapter<Currency, CurrencySelectorRecyclerViewAdapter.ViewHolder> {
+
+    private OnCurrencySelectedListener currencySelectedListener;
+    private OnCurrencyLongClickListener currencyLongClickListener;
+    public CurrencySelectorRecyclerViewAdapter() {
+        super(Currency.DIFF_CALLBACK);
+    }
+    @NotNull
+    @Override
+    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+        View view = LayoutInflater.from(parent.getContext())
+                                  .inflate(R.layout.fragment_currency_selector, parent, false);
+        return new ViewHolder(view);
+    }
+
+    @Override
+    public void onBindViewHolder(final ViewHolder holder, int position) {
+        holder.bindTo(getItem(position));
+    }
+    public void setCurrencySelectedListener(OnCurrencySelectedListener listener) {
+        this.currencySelectedListener = listener;
+    }
+    public void resetCurrencySelectedListener() {
+        currencySelectedListener = null;
+    }
+    public void notifyCurrencySelected(Currency currency) {
+        if (null != currencySelectedListener)
+            currencySelectedListener.onCurrencySelected(currency);
+    }
+    public void setCurrencyLongClickListener(OnCurrencyLongClickListener listener) {
+        this.currencyLongClickListener = listener;
+    }
+    public void resetCurrencyLockClickListener() { currencyLongClickListener = null; }
+    private void notifyCurrencyLongClicked(Currency mItem) {
+        if (null != currencyLongClickListener)
+            currencyLongClickListener.onCurrencyLongClick(mItem);
+    }
+
+    public class ViewHolder extends RecyclerView.ViewHolder {
+        private final TextView mNameView;
+        private Currency mItem;
+
+        ViewHolder(View view) {
+            super(view);
+            mNameView = view.findViewById(R.id.content);
+
+            view.setOnClickListener(v -> notifyCurrencySelected(mItem));
+            view.setOnLongClickListener(v -> {
+                notifyCurrencyLongClicked(mItem);
+                return false;
+            });
+        }
+
+        @NotNull
+        @Override
+        public String toString() {
+            return super.toString() + " '" + mNameView.getText() + "'";
+        }
+        void bindTo(Currency item) {
+            mItem = item;
+            mNameView.setText(item.getName());
+        }
+    }
+}