From a4796ec47d89a851b260b6fc195494547208a025 Mon Sep 17 00:00:00 2001
From: Torsten Grote <t@grobox.de>
Date: Wed, 18 Mar 2020 14:24:41 -0300
Subject: Merge all three apps into one repository

---
 .../taler/merchantpos/order/ProductsFragment.kt    | 111 +++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 merchant-terminal/src/main/java/net/taler/merchantpos/order/ProductsFragment.kt

(limited to 'merchant-terminal/src/main/java/net/taler/merchantpos/order/ProductsFragment.kt')

diff --git a/merchant-terminal/src/main/java/net/taler/merchantpos/order/ProductsFragment.kt b/merchant-terminal/src/main/java/net/taler/merchantpos/order/ProductsFragment.kt
new file mode 100644
index 0000000..4704ad0
--- /dev/null
+++ b/merchant-terminal/src/main/java/net/taler/merchantpos/order/ProductsFragment.kt
@@ -0,0 +1,111 @@
+/*
+ * This file is part of GNU Taler
+ * (C) 2020 Taler Systems S.A.
+ *
+ * GNU Taler is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 3, or (at your option) any later version.
+ *
+ * GNU Taler 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package net.taler.merchantpos.order
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.View.INVISIBLE
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.activityViewModels
+import androidx.lifecycle.Observer
+import androidx.recyclerview.widget.GridLayoutManager
+import androidx.recyclerview.widget.RecyclerView.Adapter
+import androidx.recyclerview.widget.RecyclerView.ViewHolder
+import kotlinx.android.synthetic.main.fragment_products.*
+import net.taler.merchantpos.MainViewModel
+import net.taler.merchantpos.R
+import net.taler.merchantpos.order.ProductAdapter.ProductViewHolder
+
+interface ProductSelectionListener {
+    fun onProductSelected(product: ConfigProduct)
+}
+
+class ProductsFragment : Fragment(), ProductSelectionListener {
+
+    private val viewModel: MainViewModel by activityViewModels()
+    private val orderManager by lazy { viewModel.orderManager }
+    private val adapter = ProductAdapter(this)
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.fragment_products, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        productsList.apply {
+            adapter = this@ProductsFragment.adapter
+            layoutManager = GridLayoutManager(requireContext(), 3)
+        }
+
+        orderManager.products.observe(viewLifecycleOwner, Observer { products ->
+            if (products == null) {
+                adapter.setItems(emptyList())
+            } else {
+                adapter.setItems(products)
+            }
+            progressBar.visibility = INVISIBLE
+        })
+    }
+
+    override fun onProductSelected(product: ConfigProduct) {
+        orderManager.addProduct(orderManager.currentOrderId.value!!, product)
+    }
+
+}
+
+private class ProductAdapter(
+    private val listener: ProductSelectionListener
+) : Adapter<ProductViewHolder>() {
+
+    private val products = ArrayList<ConfigProduct>()
+
+    override fun getItemCount() = products.size
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ProductViewHolder {
+        val view =
+            LayoutInflater.from(parent.context).inflate(R.layout.list_item_product, parent, false)
+        return ProductViewHolder(view)
+    }
+
+    override fun onBindViewHolder(holder: ProductViewHolder, position: Int) {
+        holder.bind(products[position])
+    }
+
+    fun setItems(items: List<ConfigProduct>) {
+        products.clear()
+        products.addAll(items)
+        notifyDataSetChanged()
+    }
+
+    private inner class ProductViewHolder(private val v: View) : ViewHolder(v) {
+        private val name: TextView = v.findViewById(R.id.name)
+        private val price: TextView = v.findViewById(R.id.price)
+
+        fun bind(product: ConfigProduct) {
+            name.text = product.localizedDescription
+            price.text = product.priceAsDouble.toString()
+            v.setOnClickListener { listener.onProductSelected(product) }
+        }
+    }
+
+}
-- 
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