AuthRefreshRecyclerFragment.java

/*
 * Copyright 2015 Hannes Dorfmann.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hannesdorfmann.mosby3.sample.mail.base.view;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ObjectAnimator;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.annotation.Nullable;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import com.hannesdorfmann.mosby3.mvp.MvpPresenter;
import com.hannesdorfmann.mosby3.sample.mail.R;
import com.hannesdorfmann.mosby3.sample.mail.base.view.viewstate.AuthCastedArrayListViewState;
import com.hannesdorfmann.mosby3.sample.mail.base.view.viewstate.AuthViewState;
import java.util.List;

/**
 * @author Hannes Dorfmann
 */
public abstract class AuthRefreshRecyclerFragment<M extends List<? extends Parcelable>, V extends AuthView<M>, P extends MvpPresenter<V>>
    extends AuthRefreshFragment<M, V, P> {

  protected View emptyView;
  protected RecyclerView recyclerView;
  protected ListAdapter<M> adapter;

  protected abstract ListAdapter<M> createAdapter();

  @Override public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    emptyView = view.findViewById(R.id.emptyView);
    recyclerView = (RecyclerView) view.findViewById(R.id.recyclerView);
    adapter = createAdapter();
    recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
    recyclerView.setAdapter(adapter);
  }

  @Override public void setData(M data) {
    adapter.setItems(data);
    adapter.notifyDataSetChanged();
  }

  @Override public AuthViewState<M, V> createViewState() {
    return new AuthCastedArrayListViewState<>();
  }

  @Override public M getData() {
    return adapter.getItems();
  }

  @Override public void showContent() {

    if (adapter.getItemCount() == 0) {
      if (isRestoringViewState()) {
        emptyView.setVisibility(View.VISIBLE);
      } else {
        ObjectAnimator anim = ObjectAnimator.ofFloat(emptyView, "alpha", 0f, 1f).setDuration(300);
        anim.setStartDelay(250);
        anim.addListener(new AnimatorListenerAdapter() {

          @Override public void onAnimationStart(Animator animation) {
            emptyView.setVisibility(View.VISIBLE);
          }
        });
        anim.start();
      }
    } else {
      emptyView.setVisibility(View.GONE);
    }

    super.showContent();
  }

  @Override public void showLoading(boolean pullToRefresh) {
    super.showLoading(pullToRefresh);
    if (!pullToRefresh) {
      emptyView.setVisibility(View.GONE);
    }
  }

  @Override public void showError(Throwable e, boolean pullToRefresh) {
    super.showError(e, pullToRefresh);
    if (!pullToRefresh) {
      emptyView.setVisibility(View.GONE);
    }
  }
}