/*
* Copyright 2012 GitHub Inc.
*
* 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.github.mobile.ui;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.ViewGroup;
/**
* Pager that stores current fragment
*/
public abstract class FragmentStatePagerAdapter extends
android.support.v4.app.FragmentStatePagerAdapter implements
FragmentProvider {
private final ActionBarActivity activity;
private Fragment selected;
/**
* @param activity
*/
public FragmentStatePagerAdapter(final ActionBarActivity activity) {
super(activity.getSupportFragmentManager());
this.activity = activity;
}
/**
* @param fragment
*/
public FragmentStatePagerAdapter(final Fragment fragment) {
super(fragment.getChildFragmentManager());
this.activity = (ActionBarActivity) fragment.getActivity();
}
@Override
public Fragment getSelected() {
return selected;
}
@Override
public void setPrimaryItem(final ViewGroup container, final int position,
final Object object) {
super.setPrimaryItem(container, position, object);
boolean changed = false;
if (object instanceof Fragment) {
changed = object != selected;
selected = (Fragment) object;
} else {
changed = object != null;
selected = null;
}
if (changed)
activity.invalidateOptionsMenu();
}
}