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