X-Git-Url: https://git.mdrn.pl/wl-app.git/blobdiff_plain/48b2fe9f7c2dc3d9aeaaa6dbfb27c7da4f3235ff..269195b3729c1bdc22e9053ee4ebca667ea8549d:/Android/app/src/main/java/com/moiseum/wolnelektury/components/recycler/RecyclerAdapter.java?ds=sidebyside

diff --git a/Android/app/src/main/java/com/moiseum/wolnelektury/components/recycler/RecyclerAdapter.java b/Android/app/src/main/java/com/moiseum/wolnelektury/components/recycler/RecyclerAdapter.java
new file mode 100644
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--- /dev/null
+++ b/Android/app/src/main/java/com/moiseum/wolnelektury/components/recycler/RecyclerAdapter.java
@@ -0,0 +1,187 @@
+package com.moiseum.wolnelektury.components.recycler;
+
+import android.content.Context;
+import android.support.v7.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.moiseum.wolnelektury.connection.models.CategoryModel;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * @author golonkos
+ */
+
+public abstract class RecyclerAdapter<T, VH extends ViewHolder> extends RecyclerView.Adapter<VH> {
+
+	/**
+	 * On click listener.
+	 */
+	public interface OnItemClickListener<T> {
+		/**
+		 * @param item clicked item
+		 * @param view clicked view
+		 */
+		void onItemClicked(T item, View view, int position);
+	}
+
+	public enum Selection {
+		NONE, SINGLE
+	}
+
+	private static final int NO_POSITION = -1;
+
+	private LayoutInflater layoutInflater;
+	private OnItemClickListener<T> onItemClickListener;
+
+	private List<T> items = Collections.emptyList();
+
+	private T selectedItem;
+	private int selectedItemPosition = NO_POSITION;
+
+	private Selection selection = Selection.NONE;
+
+	private View.OnClickListener onClickListener = new View.OnClickListener() {
+		@Override
+		public void onClick(View v) {
+			int position = (int) v.getTag();
+			T item = getItem(position);
+			onItemClicked(v, item, position);
+		}
+	};
+
+	public RecyclerAdapter(Context context, Selection selection) {
+		layoutInflater = LayoutInflater.from(context);
+		this.selection = selection;
+	}
+
+	protected void onItemClicked(View view, T item, int position) {
+		selectItemAndNotify(item, position);
+		if (onItemClickListener != null) {
+			onItemClickListener.onItemClicked(item, view, position);
+		}
+	}
+
+	@Override
+	public void onBindViewHolder(VH viewHolder, final int position) {
+		viewHolder.itemView.setTag(position);
+		viewHolder.itemView.setOnClickListener(onClickListener);
+		T item = getItem(position);
+		viewHolder.itemView.setSelected(isSelected(getItem(position)));
+		viewHolder.bind(item, isSelected(item));
+	}
+
+	@Override
+	public int getItemCount() {
+		return items.size();
+	}
+
+
+	/**
+	 * @param onItemClickListener item click listener
+	 */
+	public void setOnItemClickListener(OnItemClickListener<T> onItemClickListener) {
+		this.onItemClickListener = onItemClickListener;
+	}
+
+
+	public OnItemClickListener<T> getOnItemClickListener() {
+		return onItemClickListener;
+	}
+
+	public List<T> getItems() {
+		return items;
+	}
+
+	/**
+	 * @param items new items
+	 */
+	public void setItems(List<T> items) {
+		this.items = items;
+		notifyDataSetChanged();
+	}
+
+	public void addItems(List<T> items) {
+		this.items.addAll(items);
+		notifyDataSetChanged();
+	}
+
+	/**
+	 * @param position position of element to remove
+	 * @return removed item or null if element not found
+	 */
+	public T removeItem(int position) {
+		if (position >= 0 && position < items.size()) {
+			T item = items.remove(position);
+			notifyItemRemoved(position);
+			notifyItemRangeChanged(position, items.size());
+			return item;
+		}
+		return null;
+	}
+
+	public void clear() {
+		this.items.clear();
+		notifyDataSetChanged();
+	}
+
+	protected void addItem(int position, T item) {
+		items.add(position, item);
+	}
+
+	protected View inflate(int layoutResId, ViewGroup parent) {
+		return layoutInflater.inflate(layoutResId, parent, false);
+	}
+
+	/**
+	 * @param position position of element
+	 * @return item from specific position
+	 */
+	public T getItem(int position) {
+		return this.items.get(position);
+	}
+
+	protected abstract String getItemId(T item);
+
+	private boolean isSelected(T item) {
+		return selectedItem != null && getItemId(selectedItem).contains(getItemId(item));
+	}
+
+	public void selectItem(T item) {
+		int position = NO_POSITION;
+		for (int i = 0; i < items.size(); i++) {
+			if (getItemId(item).equals(getItemId(items.get(i)))) {
+				position = i;
+				break;
+			}
+		}
+		selectItemAndNotify(item, position);
+	}
+
+	private void selectItemAndNotify(T item, int position) {
+		int selectedPositionToNotify = selectedItemPosition;
+		setSelectedItem(item, position);
+
+		if (selectedPositionToNotify != NO_POSITION) {
+			notifyItemChanged(selectedPositionToNotify);
+		}
+		notifyItemChanged(position);
+	}
+
+	private void setSelectedItem(T item, int position) {
+		switch (selection) {
+			case SINGLE:
+				selectedItem = item;
+				selectedItemPosition = position;
+				break;
+			case NONE:
+				break;
+		}
+	}
+
+
+}
+