graphics/java/android/graphics/drawable/RotateDrawable.java - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2007 The Android Open Source Project
  *
  * 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 android.graphics.drawable;

 import com.android.internal.R;

 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;

 import android.graphics.Canvas;
 import android.graphics.ColorFilter;
 import android.graphics.Rect;
 import android.graphics.PorterDuff.Mode;
 import android.content.res.ColorStateList;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
 import android.content.res.Resources.Theme;
 import android.util.TypedValue;
 import android.util.AttributeSet;

 import java.io.IOException;

 /**
  * <p>
  * A Drawable that can rotate another Drawable based on the current level value.
  * The start and end angles of rotation can be controlled to map any circular
  * arc to the level values range.
  * <p>
  * It can be defined in an XML file with the <code>&lt;rotate&gt;</code> element.
  * For more information, see the guide to
  * <a href="{@docRoot}guide/topics/resources/animation-resource.html">Animation Resources</a>.
  *
  * @attr ref android.R.styleable#RotateDrawable_visible
  * @attr ref android.R.styleable#RotateDrawable_fromDegrees
  * @attr ref android.R.styleable#RotateDrawable_toDegrees
  * @attr ref android.R.styleable#RotateDrawable_pivotX
  * @attr ref android.R.styleable#RotateDrawable_pivotY
  * @attr ref android.R.styleable#RotateDrawable_drawable
  */
 public class RotateDrawable extends Drawable implements Drawable.Callback {
     private static final float MAX_LEVEL = 10000.0f;

     private final RotateState mState;

     private boolean mMutated;

     /**
      * Create a new rotating drawable with an empty state.
      */
     public RotateDrawable() {
         this(null, null);
     }

     /**
      * Create a new rotating drawable with the specified state. A copy of
      * this state is used as the internal state for the newly created
      * drawable.
      *
      * @param rotateState the state for this drawable
      */
     private RotateDrawable(RotateState rotateState, Resources res) {
         mState = new RotateState(rotateState, this, res);
     }

     @Override
     public void draw(Canvas canvas) {
         final RotateState st = mState;
         final Drawable d = st.mDrawable;
         final Rect bounds = d.getBounds();
         final int w = bounds.right - bounds.left;
         final int h = bounds.bottom - bounds.top;
         final float px = st.mPivotXRel ? (w * st.mPivotX) : st.mPivotX;
         final float py = st.mPivotYRel ? (h * st.mPivotY) : st.mPivotY;

         final int saveCount = canvas.save();
         canvas.rotate(st.mCurrentDegrees, px + bounds.left, py + bounds.top);
         d.draw(canvas);
         canvas.restoreToCount(saveCount);
     }

     /**
      * Sets the drawable rotated by this RotateDrawable.
      *
      * @param drawable The drawable to rotate
      */
     public void setDrawable(Drawable drawable) {
         final Drawable oldDrawable = mState.mDrawable;
         if (oldDrawable != drawable) {
             if (oldDrawable != null) {
                 oldDrawable.setCallback(null);
             }
             mState.mDrawable = drawable;
             if (drawable != null) {
                 drawable.setCallback(this);
             }
         }
     }

     /**
      * @return The drawable rotated by this RotateDrawable
      */
     public Drawable getDrawable() {
         return mState.mDrawable;
     }

     @Override
     public int getChangingConfigurations() {
         return super.getChangingConfigurations()
                 | mState.mChangingConfigurations
                 | mState.mDrawable.getChangingConfigurations();
     }

     @Override
     public void setAlpha(int alpha) {
         mState.mDrawable.setAlpha(alpha);
     }

     @Override
     public int getAlpha() {
         return mState.mDrawable.getAlpha();
     }

     @Override
     public void setColorFilter(ColorFilter cf) {
         mState.mDrawable.setColorFilter(cf);
     }

     @Override
     public void setTintList(ColorStateList tint) {
         mState.mDrawable.setTintList(tint);
     }

     @Override
     public void setTintMode(Mode tintMode) {
         mState.mDrawable.setTintMode(tintMode);
     }

     @Override
     public int getOpacity() {
         return mState.mDrawable.getOpacity();
     }

     /**
      * Sets the start angle for rotation.
      *
      * @param fromDegrees Starting angle in degrees
      *
      * @see #getFromDegrees()
      * @attr ref android.R.styleable#RotateDrawable_fromDegrees
      */
     public void setFromDegrees(float fromDegrees) {
         if (mState.mFromDegrees != fromDegrees) {
             mState.mFromDegrees = fromDegrees;
             invalidateSelf();
         }
     }

     /**
      * @return The starting angle for rotation in degrees
      *
      * @see #setFromDegrees(float)
      * @attr ref android.R.styleable#RotateDrawable_fromDegrees
      */
     public float getFromDegrees() {
         return mState.mFromDegrees;
     }

     /**
      * Sets the end angle for rotation.
      *
      * @param toDegrees Ending angle in degrees
      *
      * @see #getToDegrees()
      * @attr ref android.R.styleable#RotateDrawable_toDegrees
      */
     public void setToDegrees(float toDegrees) {
         if (mState.mToDegrees != toDegrees) {
             mState.mToDegrees = toDegrees;
             invalidateSelf();
         }
     }

     /**
      * @return The ending angle for rotation in degrees
      *
      * @see #setToDegrees(float)
      * @attr ref android.R.styleable#RotateDrawable_toDegrees
      */
     public float getToDegrees() {
         return mState.mToDegrees;
     }

     /**
      * Sets the X position around which the drawable is rotated.
      *
      * @param pivotX X position around which to rotate. If the X pivot is
      *            relative, the position represents a fraction of the drawable
      *            width. Otherwise, the position represents an absolute value in
      *            pixels.
      *
      * @see #setPivotXRelative(boolean)
      * @attr ref android.R.styleable#RotateDrawable_pivotX
      */
     public void setPivotX(float pivotX) {
         if (mState.mPivotX == pivotX) {
             mState.mPivotX = pivotX;
             invalidateSelf();
         }
     }

     /**
      * @return X position around which to rotate
      *
      * @see #setPivotX(float)
      * @attr ref android.R.styleable#RotateDrawable_pivotX
      */
     public float getPivotX() {
         return mState.mPivotX;
     }

     /**
      * Sets whether the X pivot value represents a fraction of the drawable
      * width or an absolute value in pixels.
      *
      * @param relative True if the X pivot represents a fraction of the drawable
      *            width, or false if it represents an absolute value in pixels
      *
      * @see #isPivotXRelative()
      */
     public void setPivotXRelative(boolean relative) {
         if (mState.mPivotXRel == relative) {
             mState.mPivotXRel = relative;
             invalidateSelf();
         }
     }

     /**
      * @return True if the X pivot represents a fraction of the drawable width,
      *         or false if it represents an absolute value in pixels
      *
      * @see #setPivotXRelative(boolean)
      */
     public boolean isPivotXRelative() {
         return mState.mPivotXRel;
     }

     /**
      * Sets the Y position around which the drawable is rotated.
      *
      * @param pivotY Y position around which to rotate. If the Y pivot is
      *            relative, the position represents a fraction of the drawable
      *            height. Otherwise, the position represents an absolute value
      *            in pixels.
      *
      * @see #getPivotY()
      * @attr ref android.R.styleable#RotateDrawable_pivotY
      */
     public void setPivotY(float pivotY) {
         if (mState.mPivotY == pivotY) {
             mState.mPivotY = pivotY;
             invalidateSelf();
         }
     }

     /**
      * @return Y position around which to rotate
      *
      * @see #setPivotY(float)
      * @attr ref android.R.styleable#RotateDrawable_pivotY
      */
     public float getPivotY() {
         return mState.mPivotY;
     }

     /**
      * Sets whether the Y pivot value represents a fraction of the drawable
      * height or an absolute value in pixels.
      *
      * @param relative True if the Y pivot represents a fraction of the drawable
      *            height, or false if it represents an absolute value in pixels
      *
      * @see #isPivotYRelative()
      */
     public void setPivotYRelative(boolean relative) {
         if (mState.mPivotYRel == relative) {
             mState.mPivotYRel = relative;
             invalidateSelf();
         }
     }

     /**
      * @return True if the Y pivot represents a fraction of the drawable height,
      *         or false if it represents an absolute value in pixels
      *
      * @see #setPivotYRelative(boolean)
      */
     public boolean isPivotYRelative() {
         return mState.mPivotYRel;
     }

     @Override
     public boolean canApplyTheme() {
         return (mState != null && mState.canApplyTheme()) || super.canApplyTheme();
     }

     @Override
     public void invalidateDrawable(Drawable who) {
         final Callback callback = getCallback();
         if (callback != null) {
             callback.invalidateDrawable(this);
         }
     }

     @Override
     public void scheduleDrawable(Drawable who, Runnable what, long when) {
         final Callback callback = getCallback();
         if (callback != null) {
             callback.scheduleDrawable(this, what, when);
         }
     }

     @Override
     public void unscheduleDrawable(Drawable who, Runnable what) {
         final Callback callback = getCallback();
         if (callback != null) {
             callback.unscheduleDrawable(this, what);
         }
     }

    @Override
     public boolean getPadding(Rect padding) {
         return mState.mDrawable.getPadding(padding);
     }

     @Override
     public boolean setVisible(boolean visible, boolean restart) {
         mState.mDrawable.setVisible(visible, restart);
         return super.setVisible(visible, restart);
     }

     @Override
     public boolean isStateful() {
         return mState.mDrawable.isStateful();
     }

     @Override
     protected boolean onStateChange(int[] state) {
         final boolean changed = mState.mDrawable.setState(state);
         onBoundsChange(getBounds());
         return changed;
     }

     @Override
     protected boolean onLevelChange(int level) {
         mState.mDrawable.setLevel(level);
         onBoundsChange(getBounds());

         mState.mCurrentDegrees = mState.mFromDegrees +
                 (mState.mToDegrees - mState.mFromDegrees) *
                         (level / MAX_LEVEL);

         invalidateSelf();
         return true;
     }

     @Override
     protected void onBoundsChange(Rect bounds) {
         mState.mDrawable.setBounds(bounds.left, bounds.top,
                 bounds.right, bounds.bottom);
     }

     @Override
     public int getIntrinsicWidth() {
         return mState.mDrawable.getIntrinsicWidth();
     }

     @Override
     public int getIntrinsicHeight() {
         return mState.mDrawable.getIntrinsicHeight();
     }

     @Override
     public ConstantState getConstantState() {
         if (mState.canConstantState()) {
             mState.mChangingConfigurations = getChangingConfigurations();
             return mState;
         }
         return null;
     }

     @Override
     public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Theme theme)
             throws XmlPullParserException, IOException {
         final TypedArray a = obtainAttributes(r, theme, attrs, R.styleable.RotateDrawable);
         super.inflateWithAttributes(r, parser, a, R.styleable.RotateDrawable_visible);

         // Reset mDrawable to preserve old multiple-inflate behavior. This is
         // silly, but we have CTS tests that rely on it.
         mState.mDrawable = null;

         updateStateFromTypedArray(a);
         inflateChildElements(r, parser, attrs, theme);
         verifyRequiredAttributes(a);
         a.recycle();
     }

     @Override
     public void applyTheme(Theme t) {
         super.applyTheme(t);

         final RotateState state = mState;
         if (state == null) {
             return;
         }

         if (state.mThemeAttrs != null) {
             final TypedArray a = t.resolveAttributes(state.mThemeAttrs, R.styleable.RotateDrawable);
             try {
                 updateStateFromTypedArray(a);
                 verifyRequiredAttributes(a);
             } catch (XmlPullParserException e) {
                 throw new RuntimeException(e);
             } finally {
                 a.recycle();
             }
         }

         if (state.mDrawable != null && state.mDrawable.canApplyTheme()) {
             state.mDrawable.applyTheme(t);
         }

     }

     private void inflateChildElements(Resources r, XmlPullParser parser, AttributeSet attrs,
             Theme theme) throws XmlPullParserException, IOException {
         Drawable dr = null;
         int type;
         final int outerDepth = parser.getDepth();
         while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
                 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) {
             if (type != XmlPullParser.START_TAG) {
                 continue;
             }
             dr = Drawable.createFromXmlInner(r, parser, attrs, theme);
         }

         if (dr != null) {
             mState.mDrawable = dr;
             dr.setCallback(this);
         }
     }

     private void verifyRequiredAttributes(TypedArray a) throws XmlPullParserException {
         // If we're not waiting on a theme, verify required attributes.
         if (mState.mDrawable == null && (mState.mThemeAttrs == null
                 || mState.mThemeAttrs[R.styleable.ScaleDrawable_drawable] == 0)) {
             throw new XmlPullParserException(a.getPositionDescription()
                     + ": <rotate> tag requires a 'drawable' attribute or "
                     + "child tag defining a drawable");
         }
     }

     private void updateStateFromTypedArray(TypedArray a) {
         final RotateState state = mState;

         // Account for any configuration changes.
         state.mChangingConfigurations |= a.getChangingConfigurations();

         // Extract the theme attributes, if any.
         state.mThemeAttrs = a.extractThemeAttrs();

         if (a.hasValue(R.styleable.RotateDrawable_pivotX)) {
             final TypedValue tv = a.peekValue(R.styleable.RotateDrawable_pivotX);
             state.mPivotXRel = tv.type == TypedValue.TYPE_FRACTION;
             state.mPivotX = state.mPivotXRel ? tv.getFraction(1.0f, 1.0f) : tv.getFloat();
         }

         if (a.hasValue(R.styleable.RotateDrawable_pivotY)) {
             final TypedValue tv = a.peekValue(R.styleable.RotateDrawable_pivotY);
             state.mPivotYRel = tv.type == TypedValue.TYPE_FRACTION;
             state.mPivotY = state.mPivotYRel ? tv.getFraction(1.0f, 1.0f) : tv.getFloat();
         }

         state.mFromDegrees = a.getFloat(R.styleable.RotateDrawable_fromDegrees, state.mFromDegrees);
         state.mToDegrees = a.getFloat(R.styleable.RotateDrawable_toDegrees, state.mToDegrees);

         final Drawable dr = a.getDrawable(R.styleable.RotateDrawable_drawable);
         if (dr != null) {
             state.mDrawable = dr;
             dr.setCallback(this);
         }
     }

     @Override
     public Drawable mutate() {
         if (!mMutated && super.mutate() == this) {
             mState.mDrawable.mutate();
             mMutated = true;
         }
         return this;
     }

     /**
      * @hide
      */
     public void clearMutated() {
         super.clearMutated();
         mState.mDrawable.clearMutated();
         mMutated = false;
     }

     /**
      * Represents the state of a rotation for a given drawable. The same
      * rotate drawable can be invoked with different states to drive several
      * rotations at the same time.
      */
     final static class RotateState extends Drawable.ConstantState {
         int[] mThemeAttrs;
         int mChangingConfigurations;

         Drawable mDrawable;

         boolean mPivotXRel = true;
         float mPivotX = 0.5f;
         boolean mPivotYRel = true;
         float mPivotY = 0.5f;

         float mFromDegrees = 0.0f;
         float mToDegrees = 360.0f;

         float mCurrentDegrees = 0.0f;

         private boolean mCheckedConstantState;
         private boolean mCanConstantState;

         RotateState(RotateState orig, RotateDrawable owner, Resources res) {
             if (orig != null) {
                 mThemeAttrs = orig.mThemeAttrs;
                 mChangingConfigurations = orig.mChangingConfigurations;
                 if (res != null) {
                     mDrawable = orig.mDrawable.getConstantState().newDrawable(res);
                 } else {
                     mDrawable = orig.mDrawable.getConstantState().newDrawable();
                 }
                 mDrawable.setCallback(owner);
                 mDrawable.setLayoutDirection(orig.mDrawable.getLayoutDirection());
                 mDrawable.setBounds(orig.mDrawable.getBounds());
                 mDrawable.setLevel(orig.mDrawable.getLevel());
                 mPivotXRel = orig.mPivotXRel;
                 mPivotX = orig.mPivotX;
                 mPivotYRel = orig.mPivotYRel;
                 mPivotY = orig.mPivotY;
                 mFromDegrees = orig.mFromDegrees;
                 mToDegrees = orig.mToDegrees;
                 mCurrentDegrees = orig.mCurrentDegrees;
                 mCheckedConstantState = mCanConstantState = true;
             }
         }

         @Override
         public boolean canApplyTheme() {
             return mThemeAttrs != null || (mDrawable != null && mDrawable.canApplyTheme())
                     || super.canApplyTheme();
         }

         @Override
         public Drawable newDrawable() {
             return new RotateDrawable(this, null);
         }

         @Override
         public Drawable newDrawable(Resources res) {
             return new RotateDrawable(this, res);
         }

         @Override
         public int getChangingConfigurations() {
             return mChangingConfigurations;
         }

         public boolean canConstantState() {
             if (!mCheckedConstantState) {
                 mCanConstantState = mDrawable.getConstantState() != null;
                 mCheckedConstantState = true;
             }

             return mCanConstantState;
         }
     }
 }
	/*
	* Copyright (C) 2007 The Android Open Source Project
	*
	* 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 android.graphics.drawable;

	import com.android.internal.R;

	import org.xmlpull.v1.XmlPullParser;
	import org.xmlpull.v1.XmlPullParserException;

	import android.graphics.Canvas;
	import android.graphics.ColorFilter;
	import android.graphics.Rect;
	import android.graphics.PorterDuff.Mode;
	import android.content.res.ColorStateList;
	import android.content.res.Resources;
	import android.content.res.TypedArray;
	import android.content.res.Resources.Theme;
	import android.util.TypedValue;
	import android.util.AttributeSet;

	import java.io.IOException;

	/**
	* <p>
	* A Drawable that can rotate another Drawable based on the current level value.
	* The start and end angles of rotation can be controlled to map any circular
	* arc to the level values range.
	* <p>
	* It can be defined in an XML file with the <code><rotate></code> element.
	* For more information, see the guide to
	* <a href="{@docRoot}guide/topics/resources/animation-resource.html">Animation Resources</a>.
	*
	* @attr ref android.R.styleable#RotateDrawable_visible
	* @attr ref android.R.styleable#RotateDrawable_fromDegrees
	* @attr ref android.R.styleable#RotateDrawable_toDegrees
	* @attr ref android.R.styleable#RotateDrawable_pivotX
	* @attr ref android.R.styleable#RotateDrawable_pivotY
	* @attr ref android.R.styleable#RotateDrawable_drawable
	*/
	public class RotateDrawable extends Drawable implements Drawable.Callback {
	private static final float MAX_LEVEL = 10000.0f;

	private final RotateState mState;

	private boolean mMutated;

	/**
	* Create a new rotating drawable with an empty state.
	*/
	public RotateDrawable() {
	this(null, null);
	}

	/**
	* Create a new rotating drawable with the specified state. A copy of
	* this state is used as the internal state for the newly created
	* drawable.
	*
	* @param rotateState the state for this drawable
	*/
	private RotateDrawable(RotateState rotateState, Resources res) {
	mState = new RotateState(rotateState, this, res);
	}

	@Override
	public void draw(Canvas canvas) {
	final RotateState st = mState;
	final Drawable d = st.mDrawable;
	final Rect bounds = d.getBounds();
	final int w = bounds.right - bounds.left;
	final int h = bounds.bottom - bounds.top;
	final float px = st.mPivotXRel ? (w * st.mPivotX) : st.mPivotX;
	final float py = st.mPivotYRel ? (h * st.mPivotY) : st.mPivotY;

	final int saveCount = canvas.save();
	canvas.rotate(st.mCurrentDegrees, px + bounds.left, py + bounds.top);
	d.draw(canvas);
	canvas.restoreToCount(saveCount);
	}

	/**
	* Sets the drawable rotated by this RotateDrawable.
	*
	* @param drawable The drawable to rotate
	*/
	public void setDrawable(Drawable drawable) {
	final Drawable oldDrawable = mState.mDrawable;
	if (oldDrawable != drawable) {
	if (oldDrawable != null) {
	oldDrawable.setCallback(null);
	}
	mState.mDrawable = drawable;
	if (drawable != null) {
	drawable.setCallback(this);
	}
	}
	}

	/**
	* @return The drawable rotated by this RotateDrawable
	*/
	public Drawable getDrawable() {
	return mState.mDrawable;
	}

	@Override
	public int getChangingConfigurations() {
	return super.getChangingConfigurations()
	\| mState.mChangingConfigurations
	\| mState.mDrawable.getChangingConfigurations();
	}

	@Override
	public void setAlpha(int alpha) {
	mState.mDrawable.setAlpha(alpha);
	}

	@Override
	public int getAlpha() {
	return mState.mDrawable.getAlpha();
	}

	@Override
	public void setColorFilter(ColorFilter cf) {
	mState.mDrawable.setColorFilter(cf);
	}

	@Override
	public void setTintList(ColorStateList tint) {
	mState.mDrawable.setTintList(tint);
	}

	@Override
	public void setTintMode(Mode tintMode) {
	mState.mDrawable.setTintMode(tintMode);
	}

	@Override
	public int getOpacity() {
	return mState.mDrawable.getOpacity();
	}

	/**
	* Sets the start angle for rotation.
	*
	* @param fromDegrees Starting angle in degrees
	*
	* @see #getFromDegrees()
	* @attr ref android.R.styleable#RotateDrawable_fromDegrees
	*/
	public void setFromDegrees(float fromDegrees) {
	if (mState.mFromDegrees != fromDegrees) {
	mState.mFromDegrees = fromDegrees;
	invalidateSelf();
	}
	}

	/**
	* @return The starting angle for rotation in degrees
	*
	* @see #setFromDegrees(float)
	* @attr ref android.R.styleable#RotateDrawable_fromDegrees
	*/
	public float getFromDegrees() {
	return mState.mFromDegrees;
	}

	/**
	* Sets the end angle for rotation.
	*
	* @param toDegrees Ending angle in degrees
	*
	* @see #getToDegrees()
	* @attr ref android.R.styleable#RotateDrawable_toDegrees
	*/
	public void setToDegrees(float toDegrees) {
	if (mState.mToDegrees != toDegrees) {
	mState.mToDegrees = toDegrees;
	invalidateSelf();
	}
	}

	/**
	* @return The ending angle for rotation in degrees
	*
	* @see #setToDegrees(float)
	* @attr ref android.R.styleable#RotateDrawable_toDegrees
	*/
	public float getToDegrees() {
	return mState.mToDegrees;
	}

	/**
	* Sets the X position around which the drawable is rotated.
	*
	* @param pivotX X position around which to rotate. If the X pivot is
	* relative, the position represents a fraction of the drawable
	* width. Otherwise, the position represents an absolute value in
	* pixels.
	*
	* @see #setPivotXRelative(boolean)
	* @attr ref android.R.styleable#RotateDrawable_pivotX
	*/
	public void setPivotX(float pivotX) {
	if (mState.mPivotX == pivotX) {
	mState.mPivotX = pivotX;
	invalidateSelf();
	}
	}

	/**
	* @return X position around which to rotate
	*
	* @see #setPivotX(float)
	* @attr ref android.R.styleable#RotateDrawable_pivotX
	*/
	public float getPivotX() {
	return mState.mPivotX;
	}

	/**
	* Sets whether the X pivot value represents a fraction of the drawable
	* width or an absolute value in pixels.
	*
	* @param relative True if the X pivot represents a fraction of the drawable
	* width, or false if it represents an absolute value in pixels
	*
	* @see #isPivotXRelative()
	*/
	public void setPivotXRelative(boolean relative) {
	if (mState.mPivotXRel == relative) {
	mState.mPivotXRel = relative;
	invalidateSelf();
	}
	}

	/**
	* @return True if the X pivot represents a fraction of the drawable width,
	* or false if it represents an absolute value in pixels
	*
	* @see #setPivotXRelative(boolean)
	*/
	public boolean isPivotXRelative() {
	return mState.mPivotXRel;
	}

	/**
	* Sets the Y position around which the drawable is rotated.
	*
	* @param pivotY Y position around which to rotate. If the Y pivot is
	* relative, the position represents a fraction of the drawable
	* height. Otherwise, the position represents an absolute value
	* in pixels.
	*
	* @see #getPivotY()
	* @attr ref android.R.styleable#RotateDrawable_pivotY
	*/
	public void setPivotY(float pivotY) {
	if (mState.mPivotY == pivotY) {
	mState.mPivotY = pivotY;
	invalidateSelf();
	}
	}

	/**
	* @return Y position around which to rotate
	*
	* @see #setPivotY(float)
	* @attr ref android.R.styleable#RotateDrawable_pivotY
	*/
	public float getPivotY() {
	return mState.mPivotY;
	}

	/**
	* Sets whether the Y pivot value represents a fraction of the drawable
	* height or an absolute value in pixels.
	*
	* @param relative True if the Y pivot represents a fraction of the drawable
	* height, or false if it represents an absolute value in pixels
	*
	* @see #isPivotYRelative()
	*/
	public void setPivotYRelative(boolean relative) {
	if (mState.mPivotYRel == relative) {
	mState.mPivotYRel = relative;
	invalidateSelf();
	}
	}

	/**
	* @return True if the Y pivot represents a fraction of the drawable height,
	* or false if it represents an absolute value in pixels
	*
	* @see #setPivotYRelative(boolean)
	*/
	public boolean isPivotYRelative() {
	return mState.mPivotYRel;
	}

	@Override
	public boolean canApplyTheme() {
	return (mState != null && mState.canApplyTheme()) \|\| super.canApplyTheme();
	}

	@Override
	public void invalidateDrawable(Drawable who) {
	final Callback callback = getCallback();
	if (callback != null) {
	callback.invalidateDrawable(this);
	}
	}

	@Override
	public void scheduleDrawable(Drawable who, Runnable what, long when) {
	final Callback callback = getCallback();
	if (callback != null) {
	callback.scheduleDrawable(this, what, when);
	}
	}

	@Override
	public void unscheduleDrawable(Drawable who, Runnable what) {
	final Callback callback = getCallback();
	if (callback != null) {
	callback.unscheduleDrawable(this, what);
	}
	}

	@Override
	public boolean getPadding(Rect padding) {
	return mState.mDrawable.getPadding(padding);
	}

	@Override
	public boolean setVisible(boolean visible, boolean restart) {
	mState.mDrawable.setVisible(visible, restart);
	return super.setVisible(visible, restart);
	}

	@Override
	public boolean isStateful() {
	return mState.mDrawable.isStateful();
	}

	@Override
	protected boolean onStateChange(int[] state) {
	final boolean changed = mState.mDrawable.setState(state);
	onBoundsChange(getBounds());
	return changed;
	}

	@Override
	protected boolean onLevelChange(int level) {
	mState.mDrawable.setLevel(level);
	onBoundsChange(getBounds());

	mState.mCurrentDegrees = mState.mFromDegrees +
	(mState.mToDegrees - mState.mFromDegrees) *
	(level / MAX_LEVEL);

	invalidateSelf();
	return true;
	}

	@Override
	protected void onBoundsChange(Rect bounds) {
	mState.mDrawable.setBounds(bounds.left, bounds.top,
	bounds.right, bounds.bottom);
	}

	@Override
	public int getIntrinsicWidth() {
	return mState.mDrawable.getIntrinsicWidth();
	}

	@Override
	public int getIntrinsicHeight() {
	return mState.mDrawable.getIntrinsicHeight();
	}

	@Override
	public ConstantState getConstantState() {
	if (mState.canConstantState()) {
	mState.mChangingConfigurations = getChangingConfigurations();
	return mState;
	}
	return null;
	}

	@Override
	public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Theme theme)
	throws XmlPullParserException, IOException {
	final TypedArray a = obtainAttributes(r, theme, attrs, R.styleable.RotateDrawable);
	super.inflateWithAttributes(r, parser, a, R.styleable.RotateDrawable_visible);

	// Reset mDrawable to preserve old multiple-inflate behavior. This is
	// silly, but we have CTS tests that rely on it.
	mState.mDrawable = null;

	updateStateFromTypedArray(a);
	inflateChildElements(r, parser, attrs, theme);
	verifyRequiredAttributes(a);
	a.recycle();
	}

	@Override
	public void applyTheme(Theme t) {
	super.applyTheme(t);

	final RotateState state = mState;
	if (state == null) {
	return;
	}

	if (state.mThemeAttrs != null) {
	final TypedArray a = t.resolveAttributes(state.mThemeAttrs, R.styleable.RotateDrawable);
	try {
	updateStateFromTypedArray(a);
	verifyRequiredAttributes(a);
	} catch (XmlPullParserException e) {
	throw new RuntimeException(e);
	} finally {
	a.recycle();
	}
	}

	if (state.mDrawable != null && state.mDrawable.canApplyTheme()) {
	state.mDrawable.applyTheme(t);
	}

	}

	private void inflateChildElements(Resources r, XmlPullParser parser, AttributeSet attrs,
	Theme theme) throws XmlPullParserException, IOException {
	Drawable dr = null;
	int type;
	final int outerDepth = parser.getDepth();
	while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
	&& (type != XmlPullParser.END_TAG \|\| parser.getDepth() > outerDepth)) {
	if (type != XmlPullParser.START_TAG) {
	continue;
	}
	dr = Drawable.createFromXmlInner(r, parser, attrs, theme);
	}

	if (dr != null) {
	mState.mDrawable = dr;
	dr.setCallback(this);
	}
	}

	private void verifyRequiredAttributes(TypedArray a) throws XmlPullParserException {
	// If we're not waiting on a theme, verify required attributes.
	if (mState.mDrawable == null && (mState.mThemeAttrs == null
	\|\| mState.mThemeAttrs[R.styleable.ScaleDrawable_drawable] == 0)) {
	throw new XmlPullParserException(a.getPositionDescription()
	+ ": <rotate> tag requires a 'drawable' attribute or "
	+ "child tag defining a drawable");
	}
	}

	private void updateStateFromTypedArray(TypedArray a) {
	final RotateState state = mState;

	// Account for any configuration changes.
	state.mChangingConfigurations \|= a.getChangingConfigurations();

	// Extract the theme attributes, if any.
	state.mThemeAttrs = a.extractThemeAttrs();

	if (a.hasValue(R.styleable.RotateDrawable_pivotX)) {
	final TypedValue tv = a.peekValue(R.styleable.RotateDrawable_pivotX);
	state.mPivotXRel = tv.type == TypedValue.TYPE_FRACTION;
	state.mPivotX = state.mPivotXRel ? tv.getFraction(1.0f, 1.0f) : tv.getFloat();
	}

	if (a.hasValue(R.styleable.RotateDrawable_pivotY)) {
	final TypedValue tv = a.peekValue(R.styleable.RotateDrawable_pivotY);
	state.mPivotYRel = tv.type == TypedValue.TYPE_FRACTION;
	state.mPivotY = state.mPivotYRel ? tv.getFraction(1.0f, 1.0f) : tv.getFloat();
	}

	state.mFromDegrees = a.getFloat(R.styleable.RotateDrawable_fromDegrees, state.mFromDegrees);
	state.mToDegrees = a.getFloat(R.styleable.RotateDrawable_toDegrees, state.mToDegrees);

	final Drawable dr = a.getDrawable(R.styleable.RotateDrawable_drawable);
	if (dr != null) {
	state.mDrawable = dr;
	dr.setCallback(this);
	}
	}

	@Override
	public Drawable mutate() {
	if (!mMutated && super.mutate() == this) {
	mState.mDrawable.mutate();
	mMutated = true;
	}
	return this;
	}

	/**
	* @hide
	*/
	public void clearMutated() {
	super.clearMutated();
	mState.mDrawable.clearMutated();
	mMutated = false;
	}

	/**
	* Represents the state of a rotation for a given drawable. The same
	* rotate drawable can be invoked with different states to drive several
	* rotations at the same time.
	*/
	final static class RotateState extends Drawable.ConstantState {
	int[] mThemeAttrs;
	int mChangingConfigurations;

	Drawable mDrawable;

	boolean mPivotXRel = true;
	float mPivotX = 0.5f;
	boolean mPivotYRel = true;
	float mPivotY = 0.5f;

	float mFromDegrees = 0.0f;
	float mToDegrees = 360.0f;

	float mCurrentDegrees = 0.0f;

	private boolean mCheckedConstantState;
	private boolean mCanConstantState;

	RotateState(RotateState orig, RotateDrawable owner, Resources res) {
	if (orig != null) {
	mThemeAttrs = orig.mThemeAttrs;
	mChangingConfigurations = orig.mChangingConfigurations;
	if (res != null) {
	mDrawable = orig.mDrawable.getConstantState().newDrawable(res);
	} else {
	mDrawable = orig.mDrawable.getConstantState().newDrawable();
	}
	mDrawable.setCallback(owner);
	mDrawable.setLayoutDirection(orig.mDrawable.getLayoutDirection());
	mDrawable.setBounds(orig.mDrawable.getBounds());
	mDrawable.setLevel(orig.mDrawable.getLevel());
	mPivotXRel = orig.mPivotXRel;
	mPivotX = orig.mPivotX;
	mPivotYRel = orig.mPivotYRel;
	mPivotY = orig.mPivotY;
	mFromDegrees = orig.mFromDegrees;
	mToDegrees = orig.mToDegrees;
	mCurrentDegrees = orig.mCurrentDegrees;
	mCheckedConstantState = mCanConstantState = true;
	}
	}

	@Override
	public boolean canApplyTheme() {
	return mThemeAttrs != null \|\| (mDrawable != null && mDrawable.canApplyTheme())
	\|\| super.canApplyTheme();
	}

	@Override
	public Drawable newDrawable() {
	return new RotateDrawable(this, null);
	}

	@Override
	public Drawable newDrawable(Resources res) {
	return new RotateDrawable(this, res);
	}

	@Override
	public int getChangingConfigurations() {
	return mChangingConfigurations;
	}

	public boolean canConstantState() {
	if (!mCheckedConstantState) {
	mCanConstantState = mDrawable.getConstantState() != null;
	mCheckedConstantState = true;
	}

	return mCanConstantState;
	}
	}
	}