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/*
* 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.Button
import androidx.fragment.app.Fragment
import androidx.fragment.app.activityViewModels
import androidx.lifecycle.Observer
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import androidx.recyclerview.widget.RecyclerView.Adapter
import kotlinx.android.synthetic.main.fragment_categories.*
import net.taler.merchantpos.MainViewModel
import net.taler.merchantpos.R
import net.taler.merchantpos.config.Category
import net.taler.merchantpos.order.CategoryAdapter.CategoryViewHolder
interface CategorySelectionListener {
fun onCategorySelected(category: Category)
}
class CategoriesFragment : Fragment(), CategorySelectionListener {
private val viewModel: MainViewModel by activityViewModels()
private val orderManager by lazy { viewModel.orderManager }
private val adapter = CategoryAdapter(this)
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
return inflater.inflate(R.layout.fragment_categories, container, false)
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
categoriesList.apply {
adapter = this@CategoriesFragment.adapter
layoutManager = LinearLayoutManager(requireContext())
}
orderManager.categories.observe(viewLifecycleOwner, Observer { categories ->
adapter.setItems(categories)
progressBar.visibility = INVISIBLE
})
}
override fun onCategorySelected(category: Category) {
orderManager.setCurrentCategory(category)
}
}
private class CategoryAdapter(
private val listener: CategorySelectionListener
) : Adapter<CategoryViewHolder>() {
private val categories = ArrayList<Category>()
override fun getItemCount() = categories.size
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CategoryViewHolder {
val view =
LayoutInflater.from(parent.context).inflate(R.layout.list_item_category, parent, false)
return CategoryViewHolder(view)
}
override fun onBindViewHolder(holder: CategoryViewHolder, position: Int) {
holder.bind(categories[position])
}
fun setItems(items: List<Category>) {
categories.clear()
categories.addAll(items)
notifyDataSetChanged()
}
private inner class CategoryViewHolder(v: View) : RecyclerView.ViewHolder(v) {
private val button: Button = v.findViewById(R.id.button)
fun bind(category: Category) {
button.text = category.localizedName
button.isPressed = category.selected
button.setOnClickListener { listener.onCategorySelected(category) }
}
}
}
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