PagerSlidingTabStrip.java

/*
 * Copyright (C) 2013 Andreas Stuetz <andreas.stuetz@gmail.com>
 *
 * 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.wangbb.naruto.app.view;

import android.app.Activity;
import android.content.Context;
import android.content.res.ColorStateList;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Typeface;
import android.os.Parcel;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.View;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.widget.HorizontalScrollView;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.wangbb.naruto.R;

import java.util.Locale;

public class PagerSlidingTabStrip extends HorizontalScrollView implements
		PageIndicator {

	public interface IconTabProvider {
		public int getPageIconResId(int position);
	}

	// @formatter:off
	private static final int[] ATTRS = new int[] { android.R.attr.textSize,
			android.R.attr.textColor };
	// @formatter:on

	private LinearLayout.LayoutParams defaultTabLayoutParams;
	private LinearLayout.LayoutParams expandedTabLayoutParams;

	// private final PageListener pageListener = new PageListener();
	public OnPageChangeListener delegatePageListener;

	private LinearLayout tabsContainer;
	private ViewPager pager;

	private int tabCount;

	private int currentPosition = 0;
	private int selectedPosition = 0;
	private float currentPositionOffset = 0f;

	private Paint rectPaint;
	private Paint dividerPaint;

	private int indicatorColor = 0xFF666666;
	private int underlineColor = 0x1A000000;
	private int dividerColor = 0x1A000000;

	private boolean shouldExpand = false;
	private boolean textAllCaps = true;

	private int scrollOffset = 52;
	private int indicatorHeight = 8;
	private int underlineHeight = 2;
	private int dividerPadding = 12;
	private int tabPadding = 24;
	private float dividerWidth = 0.5f;

	private int tabTextSize = 12;
	private ColorStateList tabTextColor;
	// private int selectedTabTextColor = 0xFF666666;
	private Typeface tabTypeface = null;
	private int tabTypefaceStyle = Typeface.NORMAL;

	private int lastScrollX = 0;

	// private int tabBackgroundResId = R.drawable.background_tab;

	private Locale locale;

	private int iLinePadding;
	private int iIconHeight;

	public PagerSlidingTabStrip(Context context) {
		this(context, null);
	}

	public PagerSlidingTabStrip(Context context, AttributeSet attrs) {
		this(context, attrs, 0);
	}

	public PagerSlidingTabStrip(Context context, AttributeSet attrs,
			int defStyle) {
		super(context, attrs, defStyle);

		setFillViewport(true);
		setWillNotDraw(false);

		tabsContainer = new LinearLayout(context);
		tabsContainer.setOrientation(LinearLayout.HORIZONTAL);
		tabsContainer.setLayoutParams(new LayoutParams(
				LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
		addView(tabsContainer);

		DisplayMetrics dm = getResources().getDisplayMetrics();

		scrollOffset = (int) TypedValue.applyDimension(
				TypedValue.COMPLEX_UNIT_DIP, scrollOffset, dm);
		indicatorHeight = (int) TypedValue.applyDimension(
				TypedValue.COMPLEX_UNIT_DIP, indicatorHeight, dm);
		underlineHeight = (int) TypedValue.applyDimension(
				TypedValue.COMPLEX_UNIT_DIP, underlineHeight, dm);
		dividerPadding = (int) TypedValue.applyDimension(
				TypedValue.COMPLEX_UNIT_DIP, dividerPadding, dm);
		tabPadding = (int) TypedValue.applyDimension(
				TypedValue.COMPLEX_UNIT_DIP, tabPadding, dm);
		dividerWidth = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
				dividerWidth, dm);
		tabTextSize = (int) TypedValue.applyDimension(
				TypedValue.COMPLEX_UNIT_SP, tabTextSize, dm);

		// get system attrs (android:textSize and android:textColor)

		TypedArray a = context.obtainStyledAttributes(attrs, ATTRS);

		tabTextSize = a.getDimensionPixelSize(0, tabTextSize);
//		tabTextColor = a.getColor(1, tabTextColor);

		a.recycle();

		// get custom attrs

		a = context.obtainStyledAttributes(attrs,
				R.styleable.PagerSlidingTabStrip);

		indicatorColor = a.getColor(
				R.styleable.PagerSlidingTabStrip_pstsIndicatorColor,
				indicatorColor);
		underlineColor = a.getColor(
				R.styleable.PagerSlidingTabStrip_pstsUnderlineColor,
				underlineColor);
		dividerColor = a
				.getColor(R.styleable.PagerSlidingTabStrip_pstsDividerColor,
						dividerColor);
		indicatorHeight = a.getDimensionPixelSize(
				R.styleable.PagerSlidingTabStrip_pstsIndicatorHeight,
				indicatorHeight);
		underlineHeight = a.getDimensionPixelSize(
				R.styleable.PagerSlidingTabStrip_pstsUnderlineHeight,
				underlineHeight);
		dividerPadding = a.getDimensionPixelSize(
				R.styleable.PagerSlidingTabStrip_pstsDividerPadding,
				dividerPadding);
		tabPadding = a.getDimensionPixelSize(
				R.styleable.PagerSlidingTabStrip_pstsTabPaddingLeftRight,
				tabPadding);
		// tabBackgroundResId =
		// a.getResourceId(R.styleable.PagerSlidingTabStrip_pstsTabBackground,
		// tabBackgroundResId);
		shouldExpand = a
				.getBoolean(R.styleable.PagerSlidingTabStrip_pstsShouldExpand,
						shouldExpand);
		scrollOffset = a
				.getDimensionPixelSize(
						R.styleable.PagerSlidingTabStrip_pstsScrollOffset,
						scrollOffset);
		textAllCaps = a.getBoolean(
				R.styleable.PagerSlidingTabStrip_pstsTextAllCaps, textAllCaps);

		a.recycle();

		rectPaint = new Paint();
		rectPaint.setAntiAlias(true);
		rectPaint.setStyle(Style.FILL);

		dividerPaint = new Paint();
		dividerPaint.setAntiAlias(true);
		dividerPaint.setStrokeWidth(dividerWidth);

		defaultTabLayoutParams = new LinearLayout.LayoutParams(
				LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
		expandedTabLayoutParams = new LinearLayout.LayoutParams(0,
				LayoutParams.MATCH_PARENT, 1.0f);

		if (locale == null) {
			locale = getResources().getConfiguration().locale;
		}
	}

	public void setViewPager(ViewPager pager) {
		this.pager = pager;

		if (pager.getAdapter() == null) {
			throw new IllegalStateException(
					"ViewPager does not have adapter instance.");
		}

		pager.setOnPageChangeListener(this);

		notifyDataSetChanged();
	}

	public void setOnPageChangeListener(OnPageChangeListener listener) {
		this.delegatePageListener = listener;
	}

	public void notifyDataSetChanged() {

		tabsContainer.removeAllViews();

		PagerAdapter adapter = pager.getAdapter();
		tabCount = adapter.getCount();

		IconPagerAdapter iconAdapter = null;
		int iLayoutResId = 0;
		int iTextId = 0;
		int iIconLocation = 0;
		if (adapter instanceof IconPagerAdapter) {
			iconAdapter = (IconPagerAdapter) adapter;
			iLayoutResId = iconAdapter.getLayoutResId();
			iTextId = iconAdapter.getTextResId();
			iIconLocation = iconAdapter.getIconLocation();
		}
		for (int i = 0; i < tabCount; i++) {
			CharSequence title = adapter.getPageTitle(i);

			int iconResId = 0;
			if (iconAdapter != null) {
				iconResId = iconAdapter.getIconResId(i);

			}
			addTab(i, title, iconResId, iLayoutResId, iTextId, iIconLocation);
			// if (pager.getAdapter() instanceof IconTabProvider) {
			// addIconTab(i, ((IconTabProvider)
			// pager.getAdapter()).getPageIconResId(i));
			// } else {
			// addTextTab(i, pager.getAdapter().getPageTitle(i).toString());
			// }

		}

		updateTabStyles();

		getViewTreeObserver().addOnGlobalLayoutListener(
				new OnGlobalLayoutListener() {

					@Override
					public void onGlobalLayout() {
						getViewTreeObserver()
								.removeGlobalOnLayoutListener(this);
						currentPosition = pager.getCurrentItem();
						scrollToChild(currentPosition, 0);
					}
				});

	}

	// private void addTextTab(final int position, String title) {
	//
	// TextView tab = new TextView(getContext());
	// tab.setText(title);
	// tab.setGravity(Gravity.CENTER);
	// tab.setSingleLine();
	// addTab(position, tab);
	// }
	//
	// private void addIconTab(final int position, int resId) {
	//
	// ImageButton tab = new ImageButton(getContext());
	// tab.setImageResource(resId);
	//
	// addTab(position, tab);
	//
	// }
	//
	// private void addTab(final int position, View tab) {
	// tab.setFocusable(true);
	// tab.setOnClickListener(new OnClickListener() {
	// @Override
	// public void onClick(View v) {
	// pager.setCurrentItem(position);
	// }
	// });
	//
	// tab.setPadding(tabPadding, 0, tabPadding, 0);
	// tabsContainer.addView(tab, position, shouldExpand ?
	// expandedTabLayoutParams : defaultTabLayoutParams);
	// }

	private void addTab(final int position, CharSequence title, int iconResId,
			int iLayoutResId, int iTextId, int iIconLocation) {
		// final View tabView = ((Activity) getContext()).getLayoutInflater()
		// .inflate(iLayoutResId, null);
		// TextView tab_text_textview = (TextView)
		// tabView.findViewById(iTextId);
		// tab_text_textview.setText(title);
		LinearLayout tabView = new LinearLayout(getContext());
		tabView.setGravity(Gravity.CENTER);
		TextView tab_text_textview = new TextView(getContext());
		tab_text_textview.setId(position);
		tab_text_textview.setText(title);
		tab_text_textview.setGravity(Gravity.CENTER_VERTICAL);
		tab_text_textview.setSingleLine();
		// tab_text_textview.setTextColor(tabTextColor);
		// tab_text_textview.setTextColor(getResources().getColor(R.color.indicator_tab_main_text_color));
//		XmlPullParser xrp = getResources().getXml(tabTextColor);
//		try {
//			ColorStateList csl = ColorStateList.createFromXml(getResources(),
//					xrp);

//			if (tab_text_textview != null) {
				tab_text_textview.setTextColor(tabTextColor);
//			}
//		} catch (Exception e) {
//
//		}
		tab_text_textview.setTextSize(TypedValue.COMPLEX_UNIT_PX, tabTextSize);
		tab_text_textview.setTypeface(tabTypeface, tabTypefaceStyle);
		LinearLayout.LayoutParams lpText = new LinearLayout.LayoutParams(
				LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
		if (iconResId != 0) {
			// tab_text_textview.setCompoundDrawablesWithIntrinsicBounds(
			// iconResId, 0, 0, 0);
			// Drawable mDrawable = ((Activity) getContext()).getResources()
			// .getDrawable(iconResId);
			// mDrawable.setBounds(0, 0, mDrawable.getMinimumWidth(),
			// mDrawable.getMinimumHeight());
			int iPandding = (int) ((Activity) getContext()).getResources()
					.getDimension(R.dimen.common_padding);
			ImageView icon = new ImageView(getContext());
			icon.setImageResource(iconResId);
			icon.setScaleType(ScaleType.CENTER_INSIDE);
			LinearLayout.LayoutParams lpImage = new LinearLayout.LayoutParams(
					LayoutParams.WRAP_CONTENT, iIconHeight);

			switch (iIconLocation) {
			case 1:
				// tab_text_textview.setCompoundDrawables(mDrawable, null, null,
				// null);
				tabView.setOrientation(LinearLayout.HORIZONTAL);
				// tabView.setGravity(Gravity.CENTER_VERTICAL);

				tabView.addView(icon, lpImage);
				lpText.leftMargin = iPandding;
				tabView.addView(tab_text_textview, lpText);
				break;
			case 2:
				// tab_text_textview.setCompoundDrawables(null, mDrawable, null,
				// null);
				tabView.setOrientation(LinearLayout.VERTICAL);
				// tabView.setGravity(Gravity.CENTER_HORIZONTAL);
				tabView.addView(icon, lpImage);
				lpText.topMargin = iPandding;
				tabView.addView(tab_text_textview, lpText);
				break;
			case 3:
				// tab_text_textview.setCompoundDrawables(null, null, mDrawable,
				// null);
				tabView.setOrientation(LinearLayout.HORIZONTAL);
				// tabView.setGravity(Gravity.CENTER_VERTICAL);
				tabView.addView(tab_text_textview, lpText);
				lpImage.leftMargin = iPandding;
				tabView.addView(icon, lpImage);
				break;
			case 4:
				// tab_text_textview.setCompoundDrawables(null, null, null,
				// mDrawable);
				tabView.setOrientation(LinearLayout.VERTICAL);
				// tabView.setGravity(Gravity.CENTER_HORIZONTAL);
				tabView.addView(tab_text_textview, lpText);
				lpImage.topMargin = iPandding;
				tabView.addView(icon, lpImage);
				break;
			default:
				// tab_text_textview.setCompoundDrawables(mDrawable, null, null,
				// null);
				tabView.setOrientation(LinearLayout.HORIZONTAL);
				// tabView.setGravity(Gravity.CENTER_VERTICAL);
				tabView.addView(icon, lpImage);
				lpText.leftMargin = iPandding;
				tabView.addView(tab_text_textview, lpText);
				break;
			}

			// tab_text_textview
			// .setCompoundDrawablePadding((int) ((Activity) getContext())
			// .getResources()
			// .getDimension(R.dimen.common_padding));

		} else {
			tabView.addView(tab_text_textview, lpText);
		}

		tabView.setFocusable(true);
		tabView.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				pager.setCurrentItem(position);
			}
		});

		// tab_text_textview.setPadding(tabPadding, 0, tabPadding, 0);
		tabsContainer
				.addView(tabView, position,
						shouldExpand ? expandedTabLayoutParams
								: defaultTabLayoutParams);
	}

	private void updateTabStyles() {

		if (selectedPosition > tabCount) {
			selectedPosition = tabCount - 1;
		}
		setCurrentItem(selectedPosition);

		// for (int i = 0; i < tabCount; i++) {
		//
		// View v = tabsContainer.getChildAt(i);
		//
		// // v.setBackgroundResource(tabBackgroundResId);
		//
		// if (v instanceof TextView) {
		//
		// TextView tab = (TextView) v;
		// tab.setTextSize(TypedValue.COMPLEX_UNIT_PX, tabTextSize);
		// tab.setTypeface(tabTypeface, tabTypefaceStyle);
		// tab.setTextColor(tabTextColor);
		//
		// // setAllCaps() is only available from API 14, so the upper case
		// // is made manually if we are on a
		// // pre-ICS-build
		// if (textAllCaps) {
		// if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
		// {
		// tab.setAllCaps(true);
		// } else {
		// tab.setText(tab.getText().toString()
		// .toUpperCase(locale));
		// }
		// }
		// if (i == selectedPosition) {
		// tab.setTextColor(selectedTabTextColor);
		// }
		// }
		// }

	}

	private void scrollToChild(int position, int offset) {

		if (tabCount == 0) {
			return;
		}

		int newScrollX = tabsContainer.getChildAt(position).getLeft() + offset;

		if (position > 0 || offset > 0) {
			newScrollX -= scrollOffset;
		}

		if (newScrollX != lastScrollX) {
			lastScrollX = newScrollX;
			scrollTo(newScrollX, 0);
		}

	}

	@Override
	protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);

		if (isInEditMode() || tabCount == 0) {
			return;
		}

		final int height = getHeight();

		// draw underline
		rectPaint.setColor(underlineColor);
		canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(),
				height, rectPaint);

		// draw indicator line
		rectPaint.setColor(indicatorColor);

		// default: line below current tab
		View currentTab = tabsContainer.getChildAt(currentPosition);
		float lineLeft = currentTab.getLeft() + iLinePadding;
		float lineRight = currentTab.getRight() - iLinePadding;

		// if there is an offset, start interpolating left and right coordinates
		// between current and next tab
		if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {

			View nextTab = tabsContainer.getChildAt(currentPosition + 1);
			final float nextTabLeft = nextTab.getLeft() + iLinePadding;
			final float nextTabRight = nextTab.getRight() - iLinePadding;

			lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset)
					* lineLeft);
			lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset)
					* lineRight);
		}

		canvas.drawRect(lineLeft, height - indicatorHeight, lineRight, height,
				rectPaint);

		// draw divider

		dividerPaint.setColor(dividerColor);
		for (int i = 0; i < tabCount - 1; i++) {
			View tab = tabsContainer.getChildAt(i);
			canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(),
					height - dividerPadding, dividerPaint);
		}
	}

	// private class PageListener implements OnPageChangeListener {
	//
	// @Override
	// public void onPageScrolled(int position, float positionOffset,
	// int positionOffsetPixels) {
	// currentPosition = position;
	// currentPositionOffset = positionOffset;
	//
	// scrollToChild(position, (int) (positionOffset * tabsContainer
	// .getChildAt(position).getWidth()));
	//
	// invalidate();
	//
	// if (delegatePageListener != null) {
	// delegatePageListener.onPageScrolled(position, positionOffset,
	// positionOffsetPixels);
	// }
	// }
	//
	// @Override
	// public void onPageScrollStateChanged(int state) {
	// if (state == ViewPager.SCROLL_STATE_IDLE) {
	// scrollToChild(pager.getCurrentItem(), 0);
	// }
	//
	// if (delegatePageListener != null) {
	// delegatePageListener.onPageScrollStateChanged(state);
	// }
	// }
	//
	// @Override
	// public void onPageSelected(int position) {
	// selectedPosition = position;
	// updateTabStyles();
	// if (delegatePageListener != null) {
	// delegatePageListener.onPageSelected(position);
	// }
	// }
	//
	// }
	public void setLinePadding(int linePadding) {
		this.iLinePadding = linePadding;
	}

	public int getLinePadding() {
		return iLinePadding;
	}

	public void setIndicatorColor(int indicatorColor) {
		this.indicatorColor = indicatorColor;
		invalidate();
	}

	public void setIndicatorColorResource(int resId) {
		this.indicatorColor = getResources().getColor(resId);
		invalidate();
	}

	public int getIndicatorColor() {
		return this.indicatorColor;
	}

	public void setIndicatorHeight(int indicatorLineHeightPx) {
		this.indicatorHeight = indicatorLineHeightPx;
		invalidate();
	}

	public int getIndicatorHeight() {
		return indicatorHeight;
	}

	public void setUnderlineColor(int underlineColor) {
		this.underlineColor = underlineColor;
		invalidate();
	}

	public void setUnderlineColorResource(int resId) {
		this.underlineColor = getResources().getColor(resId);
		invalidate();
	}

	public int getUnderlineColor() {
		return underlineColor;
	}

	public void setDividerColor(int dividerColor) {
		this.dividerColor = dividerColor;
		invalidate();
	}

	public void setDividerColorResource(int resId) {
		this.dividerColor = getResources().getColor(resId);
		invalidate();
	}

	public int getDividerColor() {
		return dividerColor;
	}

	public void setUnderlineHeight(int underlineHeightPx) {
		this.underlineHeight = underlineHeightPx;
		invalidate();
	}

	public int getUnderlineHeight() {
		return underlineHeight;
	}

	public void setDividerPadding(int dividerPaddingPx) {
		this.dividerPadding = dividerPaddingPx;
		invalidate();
	}

	public int getDividerPadding() {
		return dividerPadding;
	}

	public void setScrollOffset(int scrollOffsetPx) {
		this.scrollOffset = scrollOffsetPx;
		invalidate();
	}

	public int getScrollOffset() {
		return scrollOffset;
	}

	public void setShouldExpand(boolean shouldExpand) {
		this.shouldExpand = shouldExpand;
		// notifyDataSetChanged();
	}

	public boolean getShouldExpand() {
		return shouldExpand;
	}

	public boolean isTextAllCaps() {
		return textAllCaps;
	}

	public void setAllCaps(boolean textAllCaps) {
		this.textAllCaps = textAllCaps;
	}

	public void setTextSize(int textSizePx) {
		this.tabTextSize = textSizePx;
		// updateTabStyles();
	}

	public int getTextSize() {
		return tabTextSize;
	}

	public void setTextColor(ColorStateList textColor) {
		this.tabTextColor = textColor;
		// updateTabStyles();
	}

	public void setTextColorResource(int resId) {
		this.tabTextColor = getResources().getColorStateList(resId);
		// updateTabStyles();
	}

	public ColorStateList getTextColor() {
		return tabTextColor;
	}

	// public void setSelectedTextColor(int textColor) {
	// this.selectedTabTextColor = textColor;
	// updateTabStyles();
	// }
	//
	// public void setSelectedTextColorResource(int resId) {
	// this.selectedTabTextColor = getResources().getColor(resId);
	// updateTabStyles();
	// }
	//
	// public int getSelectedTextColor() {
	// return selectedTabTextColor;
	// }

	public void setTypeface(Typeface typeface, int style) {
		this.tabTypeface = typeface;
		this.tabTypefaceStyle = style;
		updateTabStyles();
	}

	// public void setTabBackground(int resId) {
	// this.tabBackgroundResId = resId;
	// updateTabStyles();
	// }
	//
	// public int getTabBackground() {
	// return tabBackgroundResId;
	// }

	public void setTabPaddingLeftRight(int paddingPx) {
		this.tabPadding = paddingPx;
		updateTabStyles();
	}

	public int getTabPaddingLeftRight() {
		return tabPadding;
	}

	public void setIconHeight(int iconHeight) {
		this.iIconHeight = iconHeight;
	}

	@Override
	public void onRestoreInstanceState(Parcelable state) {
		SavedState savedState = (SavedState) state;
		super.onRestoreInstanceState(savedState.getSuperState());
		currentPosition = savedState.currentPosition;
		requestLayout();
	}

	@Override
	public Parcelable onSaveInstanceState() {
		Parcelable superState = super.onSaveInstanceState();
		SavedState savedState = new SavedState(superState);
		savedState.currentPosition = currentPosition;
		return savedState;
	}

	static class SavedState extends BaseSavedState {
		int currentPosition;

		public SavedState(Parcelable superState) {
			super(superState);
		}

		private SavedState(Parcel in) {
			super(in);
			currentPosition = in.readInt();
		}

		@Override
		public void writeToParcel(Parcel dest, int flags) {
			super.writeToParcel(dest, flags);
			dest.writeInt(currentPosition);
		}

		public static final Creator<SavedState> CREATOR = new Creator<SavedState>() {
			@Override
			public SavedState createFromParcel(Parcel in) {
				return new SavedState(in);
			}

			@Override
			public SavedState[] newArray(int size) {
				return new SavedState[size];
			}
		};
	}

	@Override
	public void onPageScrollStateChanged(int state) {

		if (delegatePageListener != null) {
			delegatePageListener.onPageScrollStateChanged(state);
		}
	}

	@Override
	public void onPageScrolled(int position, float positionOffset,
			int positionOffsetPixels) {

		currentPosition = position;
		currentPositionOffset = positionOffset;

		scrollToChild(position, (int) (positionOffset * tabsContainer
				.getChildAt(position).getWidth()));

		invalidate();

		if (delegatePageListener != null) {
			delegatePageListener.onPageScrolled(position, positionOffset,
					positionOffsetPixels);
		}
	}

	@Override
	public void onPageSelected(int position) {
		// setCurrentItem(position);
		selectedPosition = position;
		updateTabStyles();
		if (delegatePageListener != null) {
			delegatePageListener.onPageSelected(position);
		}
	}

	@Override
	public void setViewPager(ViewPager view, int initialPosition) {
		// TODO Auto-generated method stub

	}

	@Override
	public void setCurrentItem(int item) {
		if (pager == null) {
			throw new IllegalStateException("ViewPager has not been bound.");
		}
		selectedPosition = item;
		pager.setCurrentItem(item);

		final int tabCount = tabsContainer.getChildCount();
		for (int i = 0; i < tabCount; i++) {
			final View child = tabsContainer.getChildAt(i);
			final boolean isSelected = (i == item);
			child.setSelected(isSelected);
			// if (isSelected) {
			// animateToTab(item);
			// }
		}

	}

}