org.dmfs.webcal.fragments.MyCalendarsFragment.java Source code

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Here is the source code for org.dmfs.webcal.fragments.MyCalendarsFragment.java

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/*
 * Copyright (C) 2014 SchedJoules
 *
 * 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 org.dmfs.webcal.fragments;

import org.dmfs.android.retentionmagic.annotations.Parameter;
import org.dmfs.android.retentionmagic.annotations.Retain;
import org.dmfs.webcal.R;
import org.dmfs.webcal.adapters.MyCalendarsPagerAdapter;

import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.ActionBar.TabListener;
import android.app.FragmentTransaction;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ProgressBar;
import android.widget.TextView;

public class MyCalendarsFragment extends ActionBarFragment implements TabListener, OnPageChangeListener {
    private final static String TAG = "MyCalendarsFragment";

    public static final String ARG_TITLE = "title";

    private final static int ID_URL_LOADER = 0;

    private ViewPager mViewPager;
    private MyCalendarsPagerAdapter mAdapter;
    private TextView mMessageText;

    @Parameter(key = ARG_TITLE)
    private String mTitle;

    @Retain(permanent = true, classNS = TAG, key = "selectedTab")
    private int mSelectedTab = 0;

    private ProgressBar mProgressBar;

    public static MyCalendarsFragment newInstance(String title) {
        MyCalendarsFragment result = new MyCalendarsFragment();
        Bundle args = new Bundle();
        args.putString(ARG_TITLE, title);
        result.setArguments(args);
        return result;
    }

    public static MyCalendarsFragment newInstance(Context context, long id, String title) {
        return newInstance(title);
    }

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

    @Override
    public void onResume() {
        super.onResume();
        setupActionBar();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View returnView = inflater.inflate(R.layout.fragment_pager, container, false);
        mViewPager = (ViewPager) returnView.findViewById(R.id.pager);
        mProgressBar = (ProgressBar) returnView.findViewById(android.R.id.progress);
        mMessageText = (TextView) returnView.findViewById(android.R.id.message);
        mViewPager.setOnPageChangeListener(this);
        mAdapter = new MyCalendarsPagerAdapter(getActivity(), getChildFragmentManager());
        mViewPager.setAdapter(mAdapter);
        FragmentActivity activity = getActivity();
        activity.setTitle(mTitle);
        activity.getActionBar().setTitle(mTitle);
        setupActionBar();
        return returnView;
    }

    public void setupActionBar() {
        if (mAdapter != null) {
            setupActionBarTabs();
        }
    }

    private void setupActionBarTabs() {
        ActionBar actionBar = getActivity().getActionBar();

        int tabCount = actionBar.getTabCount();
        int pageCount = mAdapter.getCount();

        // replace titles and listeners of existing tabs
        int i = 0;
        for (; i < tabCount && i < pageCount; ++i) {
            final Tab tab = actionBar.getTabAt(i);
            tab.setText(mAdapter.getPageTitle(i));
            tab.setTabListener(this);
        }

        // add missing tabs
        for (; i < pageCount; ++i) {
            actionBar.addTab(actionBar.newTab().setText(mAdapter.getPageTitle(i)).setTabListener(this));
        }

        // remove remaining tabs
        for (; i < tabCount; --tabCount) {
            actionBar.removeTabAt(i);
        }
        if (pageCount > 1) {
            int selection = mSelectedTab;
            // changing the navigation mode might trigger a call to onTabSelected, overriding mSelectedTab with a wrong value, so save it
            actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
            mSelectedTab = selection;
            if (selection < pageCount) {
                mViewPager.setCurrentItem(selection, false);
            }

        } else {
            actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
        }
    }

    @Override
    public void onTabReselected(Tab arg0, FragmentTransaction arg1) {
        // nothing to do
    }

    @Override
    public void onTabSelected(Tab tab, FragmentTransaction fragmentTransaction) {
        mSelectedTab = tab.getPosition();
        if (mSelectedTab != mViewPager.getCurrentItem()) {
            mViewPager.setCurrentItem(tab.getPosition());
        }
    }

    @Override
    public void onTabUnselected(Tab arg0, FragmentTransaction arg1) {
        // nothing to do
    }

    @Override
    public void onPageSelected(int position) {
        ActionBar actionBar = getActivity().getActionBar();
        if (position != actionBar.getSelectedNavigationIndex()) {
            mSelectedTab = position;
            actionBar.setSelectedNavigationItem(position);
        }
    }

    @Override
    public void onPageScrollStateChanged(int arg0) {
        // nothing to do
    }

    @Override
    public void onPageScrolled(int arg0, float arg1, int arg2) {
        // nothing to do
    }

}