src/android/app/src/main/java/org/citra/citra_emu/ui/platform/PlatformGamesFragment.java


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package org.citra.citra_emu.ui.platform;

import android.database.Cursor;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import androidx.core.content.ContextCompat;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;

import org.citra.citra_emu.CitraApplication;
import org.citra.citra_emu.R;
import org.citra.citra_emu.adapters.GameAdapter;
import org.citra.citra_emu.model.GameDatabase;

public final class PlatformGamesFragment extends Fragment implements PlatformGamesView {
    private PlatformGamesPresenter mPresenter = new PlatformGamesPresenter(this);

    private GameAdapter mAdapter;
    private RecyclerView mRecyclerView;
    private TextView mTextView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_grid, container, false);

        findViews(rootView);

        mPresenter.onCreateView();

        return rootView;
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        int columns = getResources().getInteger(R.integer.game_grid_columns);
        RecyclerView.LayoutManager layoutManager = new GridLayoutManager(getActivity(), columns);
        mAdapter = new GameAdapter();

        mRecyclerView.setLayoutManager(layoutManager);
        mRecyclerView.setAdapter(mAdapter);
        mRecyclerView.addItemDecoration(new GameAdapter.SpacesItemDecoration(ContextCompat.getDrawable(getActivity(), R.drawable.gamelist_divider), 1));

        // Add swipe down to refresh gesture
        final SwipeRefreshLayout pullToRefresh = view.findViewById(R.id.refresh_grid_games);
        pullToRefresh.setOnRefreshListener(() -> {
            GameDatabase databaseHelper = CitraApplication.databaseHelper;
            databaseHelper.scanLibrary(databaseHelper.getWritableDatabase());
            refresh();
            pullToRefresh.setRefreshing(false);
        });
    }

    @Override
    public void refresh() {
        mPresenter.refresh();
        updateTextView();
    }

    @Override
    public void showGames(Cursor games) {
        if (mAdapter != null) {
            mAdapter.swapCursor(games);
        }
        updateTextView();
    }

    private void updateTextView() {
        mTextView.setVisibility(mAdapter.getItemCount() == 0 ? View.VISIBLE : View.GONE);
    }

    private void findViews(View root) {
        mRecyclerView = root.findViewById(R.id.grid_games);
        mTextView = root.findViewById(R.id.gamelist_empty_text);
    }
}