/*
* 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.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.widget.TabHost.OnTabChangeListener;
import android.widget.TabHost.TabContentFactory;
import com.github.kevinsawicki.wishlist.ViewUtils;
import com.github.mobile.R;
/**
* Activity with tabbed pages
*
* @param <V>
*/
public abstract class TabPagerActivity<V extends PagerAdapter & FragmentProvider>
extends PagerActivity implements OnTabChangeListener, TabContentFactory {
/**
* View pager
*/
protected ViewPager pager;
/**
* Tab host
*/
protected SlidingTabLayout slidingTabsLayout;
/**
* Pager adapter
*/
protected V adapter;
@Override
public void onPageSelected(final int position) {
super.onPageSelected(position);
}
@Override
public void onTabChanged(String tabId) {
}
@Override
public View createTabContent(String tag) {
return ViewUtils.setGone(new View(getApplication()), true);
}
/**
* Create pager adapter
*
* @return pager adapter
*/
protected abstract V createAdapter();
/**
* Get title for position
*
* @param position
* @return title
*/
protected String getTitle(final int position) {
return adapter.getPageTitle(position).toString();
}
/**
* Get icon for position
*
* @param position
* @return icon
*/
protected String getIcon(final int position) {
return null;
}
/**
* Set tab and pager as gone or visible
*
* @param gone
* @return this activity
*/
protected TabPagerActivity<V> setGone(boolean gone) {
ViewUtils.setGone(slidingTabsLayout, gone);
ViewUtils.setGone(pager, gone);
return this;
}
/**
* Set current item to new position
* <p/>
* This is guaranteed to only be called when a position changes and the
* current item of the pager has already been updated to the given position
* <p/>
* Sub-classes may override this method
*
* @param position
*/
protected void setCurrentItem(final int position) {
// Intentionally left blank
}
/**
* Get content view to be used when {@link #onCreate(Bundle)} is called
*
* @return layout resource id
*/
protected int getContentView() {
return R.layout.pager_with_tabs;
}
private void updateCurrentItem(final int newPosition) {
if (newPosition > -1 && newPosition < adapter.getCount()) {
pager.setItem(newPosition);
setCurrentItem(newPosition);
}
}
private void createPager() {
adapter = createAdapter();
invalidateOptionsMenu();
pager.setAdapter(adapter);
}
public void updateTabs() {
slidingTabsLayout.setViewPager(pager);
}
/**
* Configure tabs and pager
*/
protected void configureTabPager() {
if (adapter == null) {
createPager();
updateTabs();
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(getContentView());
setSupportActionBar((android.support.v7.widget.Toolbar) findViewById(R.id.toolbar));
// On Lollipop, the action bar shadow is provided by default, so have to remove it explicitly
getSupportActionBar().setElevation(0);
pager = (ViewPager) findViewById(R.id.vp_pages);
pager.setOnPageChangeListener(this);
slidingTabsLayout = (SlidingTabLayout) findViewById(R.id.sliding_tabs_layout);
slidingTabsLayout.setCustomTabView(R.layout.tab, R.id.tv_tab);
slidingTabsLayout.setSelectedIndicatorColors(getResources().getColor(android.R.color.white));
slidingTabsLayout.setDividerColors(0);
}
@Override
protected FragmentProvider getProvider() {
return adapter;
}
}