content: /*
  The contents of this file are subject to the Mozilla Public License
  Version 1.1 (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.mozilla.org/MPL/
  
  Software distributed under the License is distributed on an "AS IS"
  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
  License for the specific language governing rights and limitations
  under the License.
  
  The Original Code is collection of files collectively known as Open Camera.
  
  The Initial Developer of the Original Code is Almalence Inc.
  Portions created by Initial Developer are Copyright (C) 2013 
  by Almalence Inc. All Rights Reserved.
   */
  
  package com.almalence.ui.Switch;
  
  import com.almalence.ui.Switch.AllCapsTransformationMethod;
  import com.almalence.ui.Switch.TransformationMethodCompat2;
  
  /* <!-- +++
   import com.almalence.opencam_plus.R;
   +++ --> */
  // <!-- -+-
  import com.almalence.opencam.R;
  //-+- -->
  
  import android.content.Context;
  import android.content.res.ColorStateList;
  import android.content.res.Resources;
  import android.content.res.TypedArray;
  import android.graphics.Canvas;
  import android.graphics.Paint;
  import android.graphics.Rect;
  import android.graphics.Typeface;
  import android.graphics.drawable.Drawable;
  import android.text.Layout;
  import android.text.StaticLayout;
  import android.text.TextPaint;
  import android.text.TextUtils;
  import android.util.AttributeSet;
  import android.view.Gravity;
  import android.view.MotionEvent;
  import android.view.VelocityTracker;
  import android.view.View;
  import android.view.ViewConfiguration;
  import android.widget.CompoundButton;
  
  /**
   * A Switch is a two-state toggle switch widget that can select between two
   * options. The user may drag the "thumb" back and forth to choose the selected
   * option, or simply tap to toggle as if it were a checkbox. The
   * {@link #setText(CharSequence) text} property controls the text displayed in
   * the label for the switch, whereas the {@link #setTextOff(CharSequence) off}
   * and {@link #setTextOn(CharSequence) on} text controls the text on the thumb.
   * Similarly, the {@link #setTextAppearance(android.content.Context, int)
   * textAppearance} and the related setTypeface() methods control the typeface
   * and style of label text, whereas the
   * {@link #setSwitchTextAppearance(android.content.Context, int)
   * switchTextAppearance} and the related seSwitchTypeface() methods control that
   * of the thumb. <br>
   * 
   * Used to switch modes in night capture plugin
   * 
   * <p>
   * See the <a href=
   * "http://developer.android.com/guide/topics/ui/controls/togglebutton.html"
   * >Toggle Buttons</a> guide.
   * </p>
   * 
   * @attr ref android.R.styleable#Switch_textOn
   * @attr ref android.R.styleable#Switch_textOff
   * @attr ref android.R.styleable#Switch_switchMinWidth
   * @attr ref android.R.styleable#Switch_switchPadding
   * @attr ref android.R.styleable#Switch_switchTextAppearance
   * @attr ref android.R.styleable#Switch_thumb
   * @attr ref android.R.styleable#Switch_thumbTextPadding
   * @attr ref android.R.styleable#Switch_track
   */
  public class Switch extends CompoundButton
  {
  	private static final int			TOUCH_MODE_IDLE		= 0;
  	private static final int			TOUCH_MODE_DOWN		= 1;
  	private static final int			TOUCH_MODE_DRAGGING	= 2;
  
  	// Enum for the "typeface" XML parameter.
  	private static final int			SANS				= 1;
  	private static final int			SERIF				= 2;
  	private static final int			MONOSPACE			= 3;
  
  	private Drawable					mThumbDrawable;
  	private Drawable					mTrackDrawable;
  	private int							mThumbTextPadding;
  	private int							mSwitchMinWidth;
  	private int							mSwitchMinHeight;
  	private int							mSwitchPadding;
  	private CharSequence				mTextOn;
  	private CharSequence				mTextOff;
  
  	private int							mTouchMode;
  	private int							mTouchSlop;
  	private float						mTouchX;
  	private float						mTouchY;
  	private VelocityTracker				mVelocityTracker	= VelocityTracker.obtain();
  	private int							mMinFlingVelocity;
  
  	private float						mThumbPosition;
  	private int							mSwitchWidth;
  	private int							mSwitchHeight;
  	private int							mThumbWidth;											// Does
  																								// not
  																								// include
  																								// padding
  
  	private int							mSwitchLeft;
  	private int							mSwitchTop;
  	private int							mSwitchRight;
  	private int							mSwitchBottom;
  
  	private TextPaint					mTextPaint;
  	private ColorStateList				mTextColors;
  	private Layout						mOnLayout;
  	private Layout						mOffLayout;
  
  	private TransformationMethodCompat2	mSwitchTransformationMethod;
  
  	private final Rect					mTempRect			= new Rect();
  
  	private static final int[]			CHECKED_STATE_SET	= { android.R.attr.state_checked };
  
  	/**
  	 * Construct a new Switch with default styling.
  	 * 
  	 * @param context
  	 *            The Context that will determine this widget's theming.
  	 */
  	public Switch(Context context)
  	{
  		this(context, null);
  	}
  
  	/**
  	 * Construct a new Switch with default styling, overriding specific style
  	 * attributes as requested.
  	 * 
  	 * @param context
  	 *            The Context that will determine this widget's theming.
  	 * @param attrs
  	 *            Specification of attributes that should deviate from default
  	 *            styling.
  	 */
  	public Switch(Context context, AttributeSet attrs)
  	{
  		this(context, attrs, R.attr.switchStyle);
  	}
  
  	/**
  	 * Construct a new Switch with a default style determined by the given theme
  	 * attribute, overriding specific style attributes as requested.
  	 * 
  	 * @param context
  	 *            The Context that will determine this widget's theming.
  	 * @param attrs
  	 *            Specification of attributes that should deviate from the
  	 *            default styling.
  	 * @param defStyle
  	 *            An attribute ID within the active theme containing a reference
  	 *            to the default style for this widget. e.g.
  	 *            android.R.attr.switchStyle.
  	 */
  	public Switch(Context context, AttributeSet attrs, int defStyle)
  	{
  		super(context, attrs, defStyle);
  
  		mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
  		Resources res = getResources();
  		mTextPaint.density = res.getDisplayMetrics().density;
  
  		TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.Switch, defStyle, 0);
  
  		mThumbDrawable = a.getDrawable(R.styleable.Switch_thumb);
  		mTrackDrawable = a.getDrawable(R.styleable.Switch_track);
  		mTextOn = a.getText(R.styleable.Switch_textOn);
  		mTextOff = a.getText(R.styleable.Switch_textOff);
  		mThumbTextPadding = a.getDimensionPixelSize(R.styleable.Switch_thumbTextPadding, 0);
  		mSwitchMinWidth = a.getDimensionPixelSize(R.styleable.Switch_switchMinWidth, 0);
  		mSwitchMinHeight = a.getDimensionPixelSize(R.styleable.Switch_switchMinHeight, 0);
  		mSwitchPadding = a.getDimensionPixelSize(R.styleable.Switch_switchPadding, 0);
  
  		int appearance = a.getResourceId(R.styleable.Switch_switchTextAppearance, 0);
  		if (appearance != 0)
  		{
  			setSwitchTextAppearance(context, appearance);
  		}
  		a.recycle();
  
  		ViewConfiguration config = ViewConfiguration.get(context);
  		mTouchSlop = config.getScaledTouchSlop();
  		mMinFlingVelocity = config.getScaledMinimumFlingVelocity();
  
  		// Refresh display with current params
  		refreshDrawableState();
  		setChecked(isChecked());
  
  		// I don't know why, but in order for the OnCheckedChangeListener to
  		// work this switch has to have an OnClickListener
  		this.setOnClickListener(new View.OnClickListener()
  		{
  
  			@Override
  			public void onClick(View v)
  			{
  			}
  		});
  	}
  
  	/**
  	 * Sets the switch text color, size, style, hint color, and highlight color
  	 * from the specified TextAppearance resource.
  	 * 
  	 * @attr ref android.R.styleable#Switch_switchTextAppearance
  	 */
  	public void setSwitchTextAppearance(Context context, int resid)
  	{
  		TypedArray appearance = context.obtainStyledAttributes(resid, R.styleable.TextAppearanceSwitch);
  
  		ColorStateList colors;
  		int ts;
  
  		colors = appearance.getColorStateList(R.styleable.TextAppearanceSwitch_textColor);
  		if (colors != null)
  		{
  			mTextColors = colors;
  		} else
  		{
  			// If no color set in TextAppearance, default to the view's
  			// textColor
  			mTextColors = getTextColors();
  		}
  
  		ts = appearance.getDimensionPixelSize(R.styleable.TextAppearanceSwitch_textSize, 0);
  		if (ts != 0)
  		{
  			if (ts != mTextPaint.getTextSize())
  			{
  				mTextPaint.setTextSize(ts);
  				requestLayout();
  			}
  		}
  
  		int typefaceIndex, styleIndex;
  
  		typefaceIndex = appearance.getInt(R.styleable.TextAppearanceSwitch_typeface, -1);
  		styleIndex = appearance.getInt(R.styleable.TextAppearanceSwitch_textStyle, -1);
  
  		setSwitchTypefaceByIndex(typefaceIndex, styleIndex);
  
  		boolean allCaps = appearance.getBoolean(R.styleable.TextAppearanceSwitch_textAllCaps, false);
  		if (allCaps)
  		{
  			mSwitchTransformationMethod = new AllCapsTransformationMethod(getContext());
  			mSwitchTransformationMethod.setLengthChangesAllowed(true);
  		} else
  		{
  			mSwitchTransformationMethod = null;
  		}
  
  		appearance.recycle();
  	}
  
  	private void setSwitchTypefaceByIndex(int typefaceIndex, int styleIndex)
  	{
  		Typeface tf = null;
  		switch (typefaceIndex)
  		{
  		case SANS:
  			tf = Typeface.SANS_SERIF;
  			break;
  
  		case SERIF:
  			tf = Typeface.SERIF;
  			break;
  
  		case MONOSPACE:
  			tf = Typeface.MONOSPACE;
  			break;
  		default:
  			break;
  		}
  
  		setSwitchTypeface(tf, styleIndex);
  	}
  
  	public void setSwitchTypeface(Typeface tf, int style)
  	{
  		if (style > 0)
  		{
  			if (tf == null)
  			{
  				tf = Typeface.defaultFromStyle(style);
  			} else
  			{
  				tf = Typeface.create(tf, style);
  			}
  
  			setSwitchTypeface(tf);
  			// now compute what (if any) algorithmic styling is needed
  			int typefaceStyle = tf != null ? tf.getStyle() : 0;
  			int need = style & ~typefaceStyle;
  			mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
  			mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
  		} else
  		{
  			mTextPaint.setFakeBoldText(false);
  			mTextPaint.setTextSkewX(0);
  			setSwitchTypeface(tf);
  		}
  	}
  
  	/**
  	 * Sets the typeface in which the text should be displayed on the switch.
  	 * Note that not all Typeface families actually have bold and italic
  	 * variants, so you may need to use
  	 * {@link #setSwitchTypeface(Typeface, int)} to get the appearance that you
  	 * actually want.
  	 * 
  	 * @attr ref android.R.styleable#TextView_typeface
  	 * @attr ref android.R.styleable#TextView_textStyle
  	 */
  	public void setSwitchTypeface(Typeface tf)
  	{
  		if (mTextPaint.getTypeface() != tf)
  		{
  			mTextPaint.setTypeface(tf);
  
  			requestLayout();
  			invalidate();
  		}
  	}
  
  	/**
  	 * Set the amount of horizontal padding between the switch and the
  	 * associated text.
  	 * 
  	 * @param pixels
  	 *            Amount of padding in pixels
  	 * 
  	 * @attr ref android.R.styleable#Switch_switchPadding
  	 */
  	public void setSwitchPadding(int pixels)
  	{
  		mSwitchPadding = pixels;
  		requestLayout();
  	}
  
  	/**
  	 * Get the amount of horizontal padding between the switch and the
  	 * associated text.
  	 * 
  	 * @return Amount of padding in pixels
  	 * 
  	 * @attr ref android.R.styleable#Switch_switchPadding
  	 */
  	public int getSwitchPadding()
  	{
  		return mSwitchPadding;
  	}
  
  	/**
  	 * Set the minimum width of the switch in pixels. The switch's width will be
  	 * the maximum of this value and its measured width as determined by the
  	 * switch drawables and text used.
  	 * 
  	 * @param pixels
  	 *            Minimum width of the switch in pixels
  	 * 
  	 * @attr ref android.R.styleable#Switch_switchMinWidth
  	 */
  	public void setSwitchMinWidth(int pixels)
  	{
  		mSwitchMinWidth = pixels;
  		requestLayout();
  	}
  
  	/**
  	 * Set the minimum height of the switch in pixels. The switch's height will
  	 * be the maximum of this value and its measured width as determined by the
  	 * switch drawables.
  	 * 
  	 * @param pixels
  	 *            Minimum height of the switch in pixels
  	 * 
  	 * @attr ref android.R.styleable#Switch_switchMinHeight
  	 */
  	public void setSwitchMinHeight(int pixels)
  	{
  		mSwitchMinHeight = pixels;
  		requestLayout();
  	}
  
  	/**
  	 * Get the minimum width of the switch in pixels. The switch's width will be
  	 * the maximum of this value and its measured width as determined by the
  	 * switch drawables and text used.
  	 * 
  	 * @return Minimum width of the switch in pixels
  	 * 
  	 * @attr ref android.R.styleable#Switch_switchMinWidth
  	 */
  	public int getSwitchMinWidth()
  	{
  		return mSwitchMinWidth;
  	}
  
  	/**
  	 * Get the minimum height of the switch in pixels. The switch's height will
  	 * be the maximum of this value and its measured width as determined by the
  	 * switch drawables.
  	 * 
  	 * @return Minimum height of the switch in pixels
  	 * 
  	 * @attr ref android.R.styleable#Switch_switchMinHeight
  	 */
  	public int getSwitchMinHeight()
  	{
  		return mSwitchMinHeight;
  	}
  
  	/**
  	 * Set the horizontal padding around the text drawn on the switch itself.
  	 * 
  	 * @param pixels
  	 *            Horizontal padding for switch thumb text in pixels
  	 * 
  	 * @attr ref android.R.styleable#Switch_thumbTextPadding
  	 */
  	public void setThumbTextPadding(int pixels)
  	{
  		mThumbTextPadding = pixels;
  		requestLayout();
  	}
  
  	/**
  	 * Get the horizontal padding around the text drawn on the switch itself.
  	 * 
  	 * @return Horizontal padding for switch thumb text in pixels
  	 * 
  	 * @attr ref android.R.styleable#Switch_thumbTextPadding
  	 */
  	public int getThumbTextPadding()
  	{
  		return mThumbTextPadding;
  	}
  
  	/**
  	 * Set the drawable used for the track that the switch slides within.
  	 * 
  	 * @param track
  	 *            Track drawable
  	 * 
  	 * @attr ref android.R.styleable#Switch_track
  	 */
  	public void setTrackDrawable(Drawable track)
  	{
  		mTrackDrawable = track;
  		requestLayout();
  	}
  
  	/**
  	 * Set the drawable used for the track that the switch slides within.
  	 * 
  	 * @param resId
  	 *            Resource ID of a track drawable
  	 * 
  	 * @attr ref android.R.styleable#Switch_track
  	 */
  	public void setTrackResource(int resId)
  	{
  		setTrackDrawable(getContext().getResources().getDrawable(resId));
  	}
  
  	/**
  	 * Get the drawable used for the track that the switch slides within.
  	 * 
  	 * @return Track drawable
  	 * 
  	 * @attr ref android.R.styleable#Switch_track
  	 */
  	public Drawable getTrackDrawable()
  	{
  		return mTrackDrawable;
  	}
  
  	/**
  	 * Set the drawable used for the switch "thumb" - the piece that the user
  	 * can physically touch and drag along the track.
  	 * 
  	 * @param thumb
  	 *            Thumb drawable
  	 * 
  	 * @attr ref android.R.styleable#Switch_thumb
  	 */
  	public void setThumbDrawable(Drawable thumb)
  	{
  		mThumbDrawable = thumb;
  		requestLayout();
  	}
  
  	/**
  	 * Set the drawable used for the switch "thumb" - the piece that the user
  	 * can physically touch and drag along the track.
  	 * 
  	 * @param resId
  	 *            Resource ID of a thumb drawable
  	 * 
  	 * @attr ref android.R.styleable#Switch_thumb
  	 */
  	public void setThumbResource(int resId)
  	{
  		setThumbDrawable(getContext().getResources().getDrawable(resId));
  	}
  
  	/**
  	 * Get the drawable used for the switch "thumb" - the piece that the user
  	 * can physically touch and drag along the track.
  	 * 
  	 * @return Thumb drawable
  	 * 
  	 * @attr ref android.R.styleable#Switch_thumb
  	 */
  	public Drawable getThumbDrawable()
  	{
  		return mThumbDrawable;
  	}
  
  	/**
  	 * Returns the text displayed when the button is in the checked state.
  	 * 
  	 * @attr ref android.R.styleable#Switch_textOn
  	 */
  	public CharSequence getTextOn()
  	{
  		return mTextOn;
  	}
  
  	/**
  	 * Sets the text displayed when the button is in the checked state.
  	 * 
  	 * @attr ref android.R.styleable#Switch_textOn
  	 */
  	public void setTextOn(CharSequence textOn)
  	{
  		mTextOn = textOn;
  		requestLayout();
  	}
  
  	/**
  	 * Returns the text displayed when the button is not in the checked state.
  	 * 
  	 * @attr ref android.R.styleable#Switch_textOff
  	 */
  	public CharSequence getTextOff()
  	{
  		return mTextOff;
  	}
  
  	/**
  	 * Sets the text displayed when the button is not in the checked state.
  	 * 
  	 * @attr ref android.R.styleable#Switch_textOff
  	 */
  	public void setTextOff(CharSequence textOff)
  	{
  		mTextOff = textOff;
  		requestLayout();
  	}
  
  	@Override
  	public void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
  	{
  		if (mOnLayout == null)
  		{
  			mOnLayout = makeLayout(mTextOn);
  		}
  		if (mOffLayout == null)
  		{
  			mOffLayout = makeLayout(mTextOff);
  		}
  
  		mTrackDrawable.getPadding(mTempRect);
  		final int maxTextWidth = Math.max(mOnLayout.getWidth(), mOffLayout.getWidth());
  		mThumbWidth = maxTextWidth / 2;
  		final int switchWidth = Math.max(mSwitchMinWidth, maxTextWidth + mThumbWidth + mThumbTextPadding * 8
  				+ mTempRect.left + mTempRect.right);
  		final int switchHeight = Math.max(mSwitchMinHeight, mTrackDrawable.getIntrinsicHeight());
  
  		mSwitchWidth = switchWidth;
  		mSwitchHeight = switchHeight;
  
  		super.onMeasure(widthMeasureSpec, heightMeasureSpec);
  		final int measuredHeight = getMeasuredHeight();
  		if (measuredHeight < switchHeight)
  		{
  			setMeasuredDimension(getMeasuredWidth(), switchHeight);
  		}
  	}
  
  	private Layout makeLayout(CharSequence text)
  	{
  		final CharSequence transformed = (mSwitchTransformationMethod != null) ? mSwitchTransformationMethod
  				.getTransformation(text, this) : text;
  		return new StaticLayout(transformed, mTextPaint, (int) (float)Math.ceil(Layout.getDesiredWidth(transformed,
  				mTextPaint)), Layout.Alignment.ALIGN_NORMAL, 1.f, 0, true);
  	}
  
  	/**
  	 * @return true if (x, y) is within the target area of the switch thumb
  	 */
  	private boolean hitThumb(float x, float y)
  	{
  		mThumbDrawable.getPadding(mTempRect);
  		final int thumbTop = mSwitchTop - mTouchSlop;
  		final int thumbLeft = mSwitchLeft + (int) (mThumbPosition + 0.5f) - mTouchSlop;
  		final int thumbRight = thumbLeft + mThumbWidth + mTempRect.left + mTempRect.right + mTouchSlop;
  		final int thumbBottom = mSwitchBottom + mTouchSlop;
  		return x > thumbLeft && x < thumbRight && y > thumbTop && y < thumbBottom;
  	}
  
  	@Override
  	public boolean onTouchEvent(MotionEvent ev)
  	{
  		mVelocityTracker.addMovement(ev);
  		final int action = ev.getActionMasked();
  		switch (action)
  		{
  		case MotionEvent.ACTION_DOWN:
  			{
  				final float x = ev.getX();
  				final float y = ev.getY();
  				if (isEnabled() && hitThumb(x, y))
  				{
  					mTouchMode = TOUCH_MODE_DOWN;
  					mTouchX = x;
  					mTouchY = y;
  				}
  				break;
  			}
  
  		case MotionEvent.ACTION_MOVE:
  			{
  				switch (mTouchMode)
  				{
  				case TOUCH_MODE_IDLE:
  					// Didn't target the thumb, treat normally.
  					break;
  
  				case TOUCH_MODE_DOWN:
  					{
  						final float x = ev.getX();
  						final float y = ev.getY();
  						if (Math.abs(x - mTouchX) > mTouchSlop || Math.abs(y - mTouchY) > mTouchSlop)
  						{
  							mTouchMode = TOUCH_MODE_DRAGGING;
  							getParent().requestDisallowInterceptTouchEvent(true);
  							mTouchX = x;
  							mTouchY = y;
  							return true;
  						}
  						break;
  					}
  
  				case TOUCH_MODE_DRAGGING:
  					{
  						final float x = ev.getX();
  						final float dx = x - mTouchX;
  						float newPos = Math.max(0, Math.min(mThumbPosition + dx, getThumbScrollRange()));
  						if (newPos != mThumbPosition)
  						{
  							mThumbPosition = newPos;
  							mTouchX = x;
  							invalidate();
  						}
  						return true;
  					}
  				default:
  					break;
  				}
  				break;
  			}
  
  		case MotionEvent.ACTION_UP:
  		case MotionEvent.ACTION_CANCEL:
  			{
  				if (mTouchMode == TOUCH_MODE_DRAGGING)
  				{
  					stopDrag(ev);
  					return true;
  				}
  				mTouchMode = TOUCH_MODE_IDLE;
  				mVelocityTracker.clear();
  				break;
  			}
  		default:
  			break;
  		}
  
  		return super.onTouchEvent(ev);
  	}
  
  	private void cancelSuperTouch(MotionEvent ev)
  	{
  		MotionEvent cancel = MotionEvent.obtain(ev);
  		cancel.setAction(MotionEvent.ACTION_CANCEL);
  		super.onTouchEvent(cancel);
  		cancel.recycle();
  	}
  
  	/**
  	 * Called from onTouchEvent to end a drag operation.
  	 * 
  	 * @param ev
  	 *            Event that triggered the end of drag mode - ACTION_UP or
  	 *            ACTION_CANCEL
  	 */
  	private void stopDrag(MotionEvent ev)
  	{
  		mTouchMode = TOUCH_MODE_IDLE;
  		// Up and not canceled, also checks the switch has not been disabled
  		// during the drag
  		boolean commitChange = ev.getAction() == MotionEvent.ACTION_UP && isEnabled();
  
  		cancelSuperTouch(ev);
  
  		if (commitChange)
  		{
  			boolean newState;
  			mVelocityTracker.computeCurrentVelocity(1000);
  			float xvel = mVelocityTracker.getXVelocity();
  			if (Math.abs(xvel) > mMinFlingVelocity)
  			{
  				newState = xvel > 0;
  			} else
  			{
  				newState = getTargetCheckedState();
  			}
  			animateThumbToCheckedState(newState);
  		} else
  		{
  			animateThumbToCheckedState(isChecked());
  		}
  	}
  
  	private void animateThumbToCheckedState(boolean newCheckedState)
  	{
  		setChecked(newCheckedState);
  	}
  
  	private boolean getTargetCheckedState()
  	{
  		return mThumbPosition >= getThumbScrollRange() / 2;
  	}
  
  	private void setThumbPosition(boolean checked)
  	{
  		mThumbPosition = checked ? getThumbScrollRange() : 0;
  	}
  
  	@Override
  	public void setChecked(boolean checked)
  	{
  		super.setChecked(checked);
  		setThumbPosition(isChecked());
  		invalidate();
  	}
  
  	@Override
  	protected void onLayout(boolean changed, int left, int top, int right, int bottom)
  	{
  		super.onLayout(changed, left, top, right, bottom);
  
  		setThumbPosition(isChecked());
  
  		int switchRight;
  		int switchLeft;
  
  		switchRight = getWidth() - getPaddingRight();
  		switchLeft = switchRight - mSwitchWidth;
  
  		int switchTop = 0;
  		int switchBottom = 0;
  		switch (getGravity() & Gravity.VERTICAL_GRAVITY_MASK)
  		{
  		default:
  		case Gravity.TOP:
  			switchTop = getPaddingTop();
  			switchBottom = switchTop + mSwitchHeight;
  			break;
  
  		case Gravity.CENTER_VERTICAL:
  			switchTop = (getPaddingTop() + getHeight() - getPaddingBottom()) / 2 - mSwitchHeight / 2;
  			switchBottom = switchTop + mSwitchHeight;
  			break;
  
  		case Gravity.BOTTOM:
  			switchBottom = getHeight() - getPaddingBottom();
  			switchTop = switchBottom - mSwitchHeight;
  			break;
  		}
  
  		mSwitchLeft = switchLeft;
  		mSwitchTop = switchTop;
  		mSwitchBottom = switchBottom;
  		mSwitchRight = switchRight;
  	}
  
  	@Override
  	protected void onDraw(Canvas canvas)
  	{
  		super.onDraw(canvas);
  
  		// Draw the switch
  		int switchLeft = mSwitchLeft;
  		int switchTop = mSwitchTop;
  		int switchRight = mSwitchRight;
  		int switchBottom = mSwitchBottom;
  
  		mTrackDrawable.setBounds(switchLeft, switchTop, switchRight, switchBottom);
  		mTrackDrawable.draw(canvas);
  
  		canvas.save();
  
  		mTrackDrawable.getPadding(mTempRect);
  		int switchInnerLeft = switchLeft + mTempRect.left;
  		int switchInnerTop = switchTop + mTempRect.top;
  		int switchInnerRight = switchRight - mTempRect.right;
  		int switchInnerBottom = switchBottom - mTempRect.bottom;
  		canvas.clipRect(switchInnerLeft, switchTop, switchInnerRight, switchBottom);
  
  		mThumbDrawable.getPadding(mTempRect);
  		final int thumbPos = (int) (mThumbPosition + 0.5f);
  		int thumbLeft = switchInnerLeft - mTempRect.left + thumbPos;
  		int thumbRight = switchInnerLeft + thumbPos + mThumbWidth + mTempRect.right;
  
  		mThumbDrawable.setBounds(thumbLeft, switchTop, thumbRight, switchBottom);
  		mThumbDrawable.draw(canvas);
  
  		// mTextColors should not be null, but just in case
  		if (mTextColors != null)
  		{
  			mTextPaint.setColor(mTextColors.getColorForState(getDrawableState(), mTextColors.getDefaultColor()));
  		}
  		mTextPaint.drawableState = getDrawableState();
  
  		Layout switchText1 = makeLayout(mTextOn);
  		Layout switchText2 = makeLayout(mTextOff);
  		if (switchText1 != null && switchText2 != null)
  		{
  			canvas.translate(thumbLeft - switchText1.getWidth(),
  					(switchInnerTop + switchInnerBottom) / 2 - switchText1.getHeight() / 2);
  			switchText1.draw(canvas);
  
  			canvas.restore();
  			canvas.save();
  			canvas.clipRect(switchInnerLeft, switchTop, switchInnerRight, switchBottom);
  
  			canvas.translate(thumbRight, (switchInnerTop + switchInnerBottom) / 2 - switchText1.getHeight() / 2);
  			switchText2.draw(canvas);
  		}
  
  		canvas.restore();
  	}
  
  	@Override
  	public int getCompoundPaddingRight()
  	{
  		int padding = super.getCompoundPaddingRight() + mSwitchWidth;
  		if (!TextUtils.isEmpty(getText()))
  		{
  			padding += mSwitchPadding;
  		}
  		return padding;
  	}
  
  	private int getThumbScrollRange()
  	{
  		if (mTrackDrawable == null)
  		{
  			return 0;
  		}
  		mTrackDrawable.getPadding(mTempRect);
  		return mSwitchWidth - mThumbWidth - mTempRect.left - mTempRect.right;
  	}
  
  	@Override
  	protected int[] onCreateDrawableState(int extraSpace)
  	{
  		final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
  		if (isChecked())
  		{
  			mergeDrawableStates(drawableState, CHECKED_STATE_SET);
  		}
  		return drawableState;
  	}
  
  	@Override
  	protected void drawableStateChanged()
  	{
  		super.drawableStateChanged();
  
  		int[] myDrawableState = getDrawableState();
  
  		// Set the state of the Drawable
  		// Drawable may be null when checked state is set from XML, from super
  		// constructor
  		if (mThumbDrawable != null)
  			mThumbDrawable.setState(myDrawableState);
  		if (mTrackDrawable != null)
  			mTrackDrawable.setState(myDrawableState);
  
  		invalidate();
  	}
  
  	@Override
  	protected boolean verifyDrawable(Drawable who)
  	{
  		return super.verifyDrawable(who) || who == mThumbDrawable || who == mTrackDrawable;
  	}
  }