org.solovyev.android.views.llm.app.DialogListFragment.java Source code

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Here is the source code for org.solovyev.android.views.llm.app.DialogListFragment.java

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/*
 * Copyright 2015 serso aka se.solovyev
 *
 * 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.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * Contact details
 *
 * Email: se.solovyev@gmail.com
 * Site:  http://se.solovyev.org
 */

package org.solovyev.android.views.llm.app;

import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.app.DialogFragment;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.view.Window;

import android.support.v7.widget.WrapLinearLayoutManager;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class DialogListFragment extends DialogFragment {

    public static final String DIALOG_TAG = DialogListFragment.class.getSimpleName();
    public static final String INSERT_TEST = "> Insert Test";
    private final MessageHandler timeoutHandler = new MessageHandler();
    private DialogListAdapter adapter;
    private List<String> listItems = new ArrayList<>();
    private RecyclerView recyclerView;

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        final Dialog dialog = super.onCreateDialog(savedInstanceState);
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        return dialog;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.dialog, container);
        fillTestListItems();
        restrictHeight(view);
        initFields(view);
        initRecyclerView();
        return view;
    }

    private void fillTestListItems() {
        listItems.add("One");
        listItems.add("Two");
        listItems.add("Three");
        listItems.add("Four");
        listItems.add("Five");
        listItems.add("Six");
        listItems.add("Seven");
        listItems.add("Eight");
    }

    private void restrictHeight(final View view) {
        view.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
            @Override
            public boolean onPreDraw() {
                view.getViewTreeObserver().removeOnPreDrawListener(this);
                int dialogMaxHeight = getResources().getDimensionPixelSize(R.dimen.dialog_max_height);
                if (view.getHeight() > dialogMaxHeight) {
                    ViewGroup.LayoutParams params = view.getLayoutParams();
                    params.height = dialogMaxHeight;
                    view.setLayoutParams(params);
                }
                return true;
            }
        });
    }

    private void initFields(View view) {
        recyclerView = (RecyclerView) view.findViewById(R.id.list);
    }

    private void initRecyclerView() {
        RecyclerView.LayoutManager layoutManager = new WrapLinearLayoutManager(recyclerView,
                WrapLinearLayoutManager.VERTICAL, false);
        recyclerView.setLayoutManager(layoutManager);
        adapter = new DialogListAdapter(this, listItems);
        recyclerView.setAdapter(adapter);
    }

    @Override
    public void onDismiss(DialogInterface dialog) {
        super.onDismiss(dialog);
        removeTestItemsFromList();
    }

    public void onClick(int position) {
        String selectedItem = listItems.get(position);
        if (selectedItem.equals(INSERT_TEST)) {
            return;
        }
        int insertPosition = position + 1;
        removeTestItemsFromList();
        addTestItemForPosition(insertPosition);
    }

    private void addTestItemForPosition(int position) {
        listItems.add(position, INSERT_TEST);
        adapter.notifyItemInserted(position);
        timeoutHandler.sendMessageDelayed(timeoutHandler.obtainMessage(), 3000);
    }

    private void removeTestItemsFromList() {
        if (adapter == null) {
            return;
        }
        List<String> items = adapter.getItems();
        int index = 0;
        for (Iterator<String> iterator = items.listIterator(); iterator.hasNext(); index++) {
            String text = iterator.next();
            if (text.equals(INSERT_TEST)) {
                iterator.remove();
                adapter.notifyItemRemoved(index);
                break;
            }
        }
    }

    private class MessageHandler extends Handler {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            removeTestItemsFromList();
        }
    }
}