/*
* 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.gauges.ui;
import android.content.Context;
import android.util.AttributeSet;
/**
* Custom {@link ViewPager} extension
*/
public class ViewPager extends android.support.v4.view.ViewPager {
/**
* @param context
*/
public ViewPager(final Context context) {
super(context);
}
/**
* @param context
* @param attrs
*/
public ViewPager(final Context context, final AttributeSet attrs) {
super(context, attrs);
}
/**
* Set current item and return whether the item changed
* <p>
* This method does not call {@link #setCurrentItem(int)} unless the item
* parameter differs from the current item
*
* @param item
* @return true if set, false if same
*/
public boolean setItem(final int item) {
final boolean changed = item != getCurrentItem();
if (changed)
setCurrentItem(item, false);
return changed;
}
/**
* Set current item, invoke the listener if changes, and return whether the
* item changed
* <p>
* This method does not call {@link #setCurrentItem(int)} unless the item
* parameter differs from the current item
*
* @param item
* @param listener
* @return true if set, false if same
*/
public boolean setItem(final int item, final OnPageChangeListener listener) {
final boolean changed = setItem(item);
if (changed && listener != null)
listener.onPageSelected(item);
return changed;
}
/**
* Schedule a call to {@link #setItem(int)} to occur on the UI-thread
*
* @param item
* @param listener
*/
public void scheduleSetItem(final int item,
final OnPageChangeListener listener) {
post(new Runnable() {
@Override
public void run() {
setItem(item, listener);
}
});
}
/**
* Schedule a call to {@link #setItem(int)} to occur on the UI-thread
*
* @param item
*/
public void scheduleSetItem(final int item) {
post(new Runnable() {
@Override
public void run() {
setItem(item);
}
});
}
}