poisondog.android.view.tab.DefaultPageListener.java Source code

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Here is the source code for poisondog.android.view.tab.DefaultPageListener.java

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/*
 * Copyright (C) 2014 Adam Huang
 *
 * 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 poisondog.android.view.tab;

import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBar;

/**
 * @author Adam Huang <poisondog@gmail.com>
 */
public class DefaultPageListener extends ViewPager.SimpleOnPageChangeListener {
    private TabActivity mActivity;
    private TabAdapter mAdapter;
    private ActionBar mActionBar;

    public DefaultPageListener(TabActivity activity, TabAdapter adapter) {
        mActivity = activity;
        mAdapter = adapter;
        mActionBar = activity.getSupportActionBar();
    }

    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
        mActivity.setMenuResourceID(mAdapter.getTab(position).getMenuResourceID());
        mActivity.supportInvalidateOptionsMenu();
    }

    @Override
    public void onPageSelected(int position) {
        mActionBar.setSelectedNavigationItem(position);
        ActionBarTab tab = mAdapter.getTab(position);
        if (!tab.getTitle().isEmpty())
            mActionBar.setTitle(tab.getTitle());
        tab.updateContent();
    }

    @Override
    public void onPageScrollStateChanged(int state) {
    }
}