package com.actionbarsherlock.internal.nineoldandroids.view.animation; import java.lang.ref.WeakReference; import java.util.WeakHashMap; import android.graphics.Matrix; import android.graphics.RectF; import android.os.Build; import android.util.FloatMath; import android.view.View; import android.view.animation.Animation; import android.view.animation.Transformation; public final class AnimatorProxy extends Animation { public static final boolean NEEDS_PROXY = Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB; private static final WeakHashMap<View, AnimatorProxy> PROXIES = new WeakHashMap<View, AnimatorProxy>(); public static AnimatorProxy wrap(View view) { AnimatorProxy proxy = PROXIES.get(view); if (proxy == null) { proxy = new AnimatorProxy(view); PROXIES.put(view, proxy); } return proxy; } private final WeakReference<View> mView; private float mAlpha = 1; private float mScaleX = 1; private float mScaleY = 1; private float mTranslationX; private float mTranslationY; private final RectF mBefore = new RectF(); private final RectF mAfter = new RectF(); private final Matrix mTempMatrix = new Matrix(); private AnimatorProxy(View view) { setDuration(0); //perform transformation immediately setFillAfter(true); //persist transformation beyond duration view.setAnimation(this); mView = new WeakReference<View>(view); } public float getAlpha() { return mAlpha; } public void setAlpha(float alpha) { if (mAlpha != alpha) { mAlpha = alpha; View view = mView.get(); if (view != null) { view.invalidate(); } } } public float getScaleX() { return mScaleX; } public void setScaleX(float scaleX) { if (mScaleX != scaleX) { prepareForUpdate(); mScaleX = scaleX; invalidateAfterUpdate(); } } public float getScaleY() { return mScaleY; } public void setScaleY(float scaleY) { if (mScaleY != scaleY) { prepareForUpdate(); mScaleY = scaleY; invalidateAfterUpdate(); } } public int getScrollX() { View view = mView.get(); if (view == null) { return 0; } return view.getScrollX(); } public void setScrollX(int value) { View view = mView.get(); if (view != null) { view.scrollTo(value, view.getScrollY()); } } public int getScrollY() { View view = mView.get(); if (view == null) { return 0; } return view.getScrollY(); } public void setScrollY(int value) { View view = mView.get(); if (view != null) { view.scrollTo(view.getScrollY(), value); } } public float getTranslationX() { return mTranslationX; } public void setTranslationX(float translationX) { if (mTranslationX != translationX) { prepareForUpdate(); mTranslationX = translationX; invalidateAfterUpdate(); } } public float getTranslationY() { return mTranslationY; } public void setTranslationY(float translationY) { if (mTranslationY != translationY) { prepareForUpdate(); mTranslationY = translationY; invalidateAfterUpdate(); } } private void prepareForUpdate() { View view = mView.get(); if (view != null) { computeRect(mBefore, view); } } private void invalidateAfterUpdate() { View view = mView.get(); if (view == null) { return; } View parent = (View)view.getParent(); if (parent == null) { return; } final RectF after = mAfter; computeRect(after, view); after.union(mBefore); parent.invalidate( (int) FloatMath.floor(after.left), (int) FloatMath.floor(after.top), (int) FloatMath.ceil(after.right), (int) FloatMath.ceil(after.bottom)); } private void computeRect(final RectF r, View view) { // compute current rectangle according to matrix transformation final float w = view.getWidth(); final float h = view.getHeight(); // use a rectangle at 0,0 to make sure we don't run into issues with scaling r.set(0, 0, w, h); final Matrix m = mTempMatrix; m.reset(); transformMatrix(m, view); mTempMatrix.mapRect(r); r.offset(view.getLeft(), view.getTop()); // Straighten coords if rotations flipped them if (r.right < r.left) { final float f = r.right; r.right = r.left; r.left = f; } if (r.bottom < r.top) { final float f = r.top; r.top = r.bottom; r.bottom = f; } } private void transformMatrix(Matrix m, View view) { final float w = view.getWidth(); final float h = view.getHeight(); final float sX = mScaleX; final float sY = mScaleY; if ((sX != 1.0f) || (sY != 1.0f)) { final float deltaSX = ((sX * w) - w) / 2f; final float deltaSY = ((sY * h) - h) / 2f; m.postScale(sX, sY); m.postTranslate(-deltaSX, -deltaSY); } m.postTranslate(mTranslationX, mTranslationY); } @Override protected void applyTransformation(float interpolatedTime, Transformation t) { View view = mView.get(); if (view != null) { t.setAlpha(mAlpha); transformMatrix(t.getMatrix(), view); } } }