/*
* Copyright (C) 2013 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.transition;
import android.animation.AnimatorSet;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.PointF;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ObjectAnimator;
import android.animation.PropertyValuesHolder;
import android.animation.RectEvaluator;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Path;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.Property;
import android.view.View;
import android.view.ViewGroup;
import com.android.internal.R;
import java.util.Map;
/**
* This transition captures the layout bounds of target views before and after
* the scene change and animates those changes during the transition.
*
* <p>A ChangeBounds transition can be described in a resource file by using the
* tag <code>changeBounds</code>, using its attributes of
* {@link android.R.styleable#ChangeBounds} along with the other standard
* attributes of {@link android.R.styleable#Transition}.</p>
*/
public class ChangeBounds extends Transition {
private static final String PROPNAME_BOUNDS = "android:changeBounds:bounds";
private static final String PROPNAME_CLIP = "android:changeBounds:clip";
private static final String PROPNAME_PARENT = "android:changeBounds:parent";
private static final String PROPNAME_WINDOW_X = "android:changeBounds:windowX";
private static final String PROPNAME_WINDOW_Y = "android:changeBounds:windowY";
private static final String[] sTransitionProperties = {
PROPNAME_BOUNDS,
PROPNAME_CLIP,
PROPNAME_PARENT,
PROPNAME_WINDOW_X,
PROPNAME_WINDOW_Y
};
private static final Property<Drawable, PointF> DRAWABLE_ORIGIN_PROPERTY =
new Property<Drawable, PointF>(PointF.class, "boundsOrigin") {
private Rect mBounds = new Rect();
@Override
public void set(Drawable object, PointF value) {
object.copyBounds(mBounds);
mBounds.offsetTo(Math.round(value.x), Math.round(value.y));
object.setBounds(mBounds);
}
@Override
public PointF get(Drawable object) {
object.copyBounds(mBounds);
return new PointF(mBounds.left, mBounds.top);
}
};
private static final Property<ViewBounds, PointF> TOP_LEFT_PROPERTY =
new Property<ViewBounds, PointF>(PointF.class, "topLeft") {
@Override
public void set(ViewBounds viewBounds, PointF topLeft) {
viewBounds.setTopLeft(topLeft);
}
@Override
public PointF get(ViewBounds viewBounds) {
return null;
}
};
private static final Property<ViewBounds, PointF> BOTTOM_RIGHT_PROPERTY =
new Property<ViewBounds, PointF>(PointF.class, "bottomRight") {
@Override
public void set(ViewBounds viewBounds, PointF bottomRight) {
viewBounds.setBottomRight(bottomRight);
}
@Override
public PointF get(ViewBounds viewBounds) {
return null;
}
};
private static final Property<View, PointF> BOTTOM_RIGHT_ONLY_PROPERTY =
new Property<View, PointF>(PointF.class, "bottomRight") {
@Override
public void set(View view, PointF bottomRight) {
int left = view.getLeft();
int top = view.getTop();
int right = Math.round(bottomRight.x);
int bottom = Math.round(bottomRight.y);
view.setLeftTopRightBottom(left, top, right, bottom);
}
@Override
public PointF get(View view) {
return null;
}
};
private static final Property<View, PointF> TOP_LEFT_ONLY_PROPERTY =
new Property<View, PointF>(PointF.class, "topLeft") {
@Override
public void set(View view, PointF topLeft) {
int left = Math.round(topLeft.x);
int top = Math.round(topLeft.y);
int right = view.getRight();
int bottom = view.getBottom();
view.setLeftTopRightBottom(left, top, right, bottom);
}
@Override
public PointF get(View view) {
return null;
}
};
private static final Property<View, PointF> POSITION_PROPERTY =
new Property<View, PointF>(PointF.class, "position") {
@Override
public void set(View view, PointF topLeft) {
int left = Math.round(topLeft.x);
int top = Math.round(topLeft.y);
int right = left + view.getWidth();
int bottom = top + view.getHeight();
view.setLeftTopRightBottom(left, top, right, bottom);
}
@Override
public PointF get(View view) {
return null;
}
};
int[] tempLocation = new int[2];
boolean mResizeClip = false;
boolean mReparent = false;
private static final String LOG_TAG = "ChangeBounds";
private static RectEvaluator sRectEvaluator = new RectEvaluator();
public ChangeBounds() {}
public ChangeBounds(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ChangeBounds);
boolean resizeClip = a.getBoolean(R.styleable.ChangeBounds_resizeClip, false);
a.recycle();
setResizeClip(resizeClip);
}
@Override
public String[] getTransitionProperties() {
return sTransitionProperties;
}
/**
* When <code>resizeClip</code> is true, ChangeBounds resizes the view using the clipBounds
* instead of changing the dimensions of the view during the animation. When
* <code>resizeClip</code> is false, ChangeBounds resizes the View by changing its dimensions.
*
* <p>When resizeClip is set to true, the clip bounds is modified by ChangeBounds. Therefore,
* {@link android.transition.ChangeClipBounds} is not compatible with ChangeBounds
* in this mode.</p>
*
* @param resizeClip Used to indicate whether the view bounds should be modified or the
* clip bounds should be modified by ChangeBounds.
* @see android.view.View#setClipBounds(android.graphics.Rect)
* @attr ref android.R.styleable#ChangeBounds_resizeClip
*/
public void setResizeClip(boolean resizeClip) {
mResizeClip = resizeClip;
}
/**
* Returns true when the ChangeBounds will resize by changing the clip bounds during the
* view animation or false when bounds are changed. The default value is false.
*
* @return true when the ChangeBounds will resize by changing the clip bounds during the
* view animation or false when bounds are changed. The default value is false.
* @attr ref android.R.styleable#ChangeBounds_resizeClip
*/
public boolean getResizeClip() {
return mResizeClip;
}
/**
* Setting this flag tells ChangeBounds to track the before/after parent
* of every view using this transition. The flag is not enabled by
* default because it requires the parent instances to be the same
* in the two scenes or else all parents must use ids to allow
* the transition to determine which parents are the same.
*
* @param reparent true if the transition should track the parent
* container of target views and animate parent changes.
* @deprecated Use {@link android.transition.ChangeTransform} to handle
* transitions between different parents.
*/
public void setReparent(boolean reparent) {
mReparent = reparent;
}
private void captureValues(TransitionValues values) {
View view = values.view;
if (view.isLaidOut() || view.getWidth() != 0 || view.getHeight() != 0) {
values.values.put(PROPNAME_BOUNDS, new Rect(view.getLeft(), view.getTop(),
view.getRight(), view.getBottom()));
values.values.put(PROPNAME_PARENT, values.view.getParent());
if (mReparent) {
values.view.getLocationInWindow(tempLocation);
values.values.put(PROPNAME_WINDOW_X, tempLocation[0]);
values.values.put(PROPNAME_WINDOW_Y, tempLocation[1]);
}
if (mResizeClip) {
values.values.put(PROPNAME_CLIP, view.getClipBounds());
}
}
}
@Override
public void captureStartValues(TransitionValues transitionValues) {
captureValues(transitionValues);
}
@Override
public void captureEndValues(TransitionValues transitionValues) {
captureValues(transitionValues);
}
private boolean parentMatches(View startParent, View endParent) {
boolean parentMatches = true;
if (mReparent) {
TransitionValues endValues = getMatchedTransitionValues(startParent, true);
if (endValues == null) {
parentMatches = startParent == endParent;
} else {
parentMatches = endParent == endValues.view;
}
}
return parentMatches;
}
@Override
public Animator createAnimator(final ViewGroup sceneRoot, TransitionValues startValues,
TransitionValues endValues) {
if (startValues == null || endValues == null) {
return null;
}
Map<String, Object> startParentVals = startValues.values;
Map<String, Object> endParentVals = endValues.values;
ViewGroup startParent = (ViewGroup) startParentVals.get(PROPNAME_PARENT);
ViewGroup endParent = (ViewGroup) endParentVals.get(PROPNAME_PARENT);
if (startParent == null || endParent == null) {
return null;
}
final View view = endValues.view;
if (parentMatches(startParent, endParent)) {
Rect startBounds = (Rect) startValues.values.get(PROPNAME_BOUNDS);
Rect endBounds = (Rect) endValues.values.get(PROPNAME_BOUNDS);
final int startLeft = startBounds.left;
final int endLeft = endBounds.left;
final int startTop = startBounds.top;
final int endTop = endBounds.top;
final int startRight = startBounds.right;
final int endRight = endBounds.right;
final int startBottom = startBounds.bottom;
final int endBottom = endBounds.bottom;
final int startWidth = startRight - startLeft;
final int startHeight = startBottom - startTop;
final int endWidth = endRight - endLeft;
final int endHeight = endBottom - endTop;
Rect startClip = (Rect) startValues.values.get(PROPNAME_CLIP);
Rect endClip = (Rect) endValues.values.get(PROPNAME_CLIP);
int numChanges = 0;
if ((startWidth != 0 && startHeight != 0) || (endWidth != 0 && endHeight != 0)) {
if (startLeft != endLeft || startTop != endTop) ++numChanges;
if (startRight != endRight || startBottom != endBottom) ++numChanges;
}
if ((startClip != null && !startClip.equals(endClip)) ||
(startClip == null && endClip != null)) {
++numChanges;
}
if (numChanges > 0) {
Animator anim;
if (!mResizeClip) {
view.setLeftTopRightBottom(startLeft, startTop, startRight, startBottom);
if (numChanges == 2) {
if (startWidth == endWidth && startHeight == endHeight) {
Path topLeftPath = getPathMotion().getPath(startLeft, startTop, endLeft,
endTop);
anim = ObjectAnimator.ofObject(view, POSITION_PROPERTY, null,
topLeftPath);
} else {
final ViewBounds viewBounds = new ViewBounds(view);
Path topLeftPath = getPathMotion().getPath(startLeft, startTop,
endLeft, endTop);
ObjectAnimator topLeftAnimator = ObjectAnimator
.ofObject(viewBounds, TOP_LEFT_PROPERTY, null, topLeftPath);
Path bottomRightPath = getPathMotion().getPath(startRight, startBottom,
endRight, endBottom);
ObjectAnimator bottomRightAnimator = ObjectAnimator.ofObject(viewBounds,
BOTTOM_RIGHT_PROPERTY, null, bottomRightPath);
AnimatorSet set = new AnimatorSet();
set.playTogether(topLeftAnimator, bottomRightAnimator);
anim = set;
set.addListener(new AnimatorListenerAdapter() {
// We need a strong reference to viewBounds until the
// animator ends.
private ViewBounds mViewBounds = viewBounds;
});
}
} else if (startLeft != endLeft || startTop != endTop) {
Path topLeftPath = getPathMotion().getPath(startLeft, startTop,
endLeft, endTop);
anim = ObjectAnimator.ofObject(view, TOP_LEFT_ONLY_PROPERTY, null,
topLeftPath);
} else {
Path bottomRight = getPathMotion().getPath(startRight, startBottom,
endRight, endBottom);
anim = ObjectAnimator.ofObject(view, BOTTOM_RIGHT_ONLY_PROPERTY, null,
bottomRight);
}
} else {
int maxWidth = Math.max(startWidth, endWidth);
int maxHeight = Math.max(startHeight, endHeight);
view.setLeftTopRightBottom(startLeft, startTop, startLeft + maxWidth,
startTop + maxHeight);
ObjectAnimator positionAnimator = null;
if (startLeft != endLeft || startTop != endTop) {
Path topLeftPath = getPathMotion().getPath(startLeft, startTop, endLeft,
endTop);
positionAnimator = ObjectAnimator.ofObject(view, POSITION_PROPERTY, null,
topLeftPath);
}
final Rect finalClip = endClip;
if (startClip == null) {
startClip = new Rect(0, 0, startWidth, startHeight);
}
if (endClip == null) {
endClip = new Rect(0, 0, endWidth, endHeight);
}
ObjectAnimator clipAnimator = null;
if (!startClip.equals(endClip)) {
view.setClipBounds(startClip);
clipAnimator = ObjectAnimator.ofObject(view, "clipBounds", sRectEvaluator,
startClip, endClip);
clipAnimator.addListener(new AnimatorListenerAdapter() {
private boolean mIsCanceled;
@Override
public void onAnimationCancel(Animator animation) {
mIsCanceled = true;
}
@Override
public void onAnimationEnd(Animator animation) {
if (!mIsCanceled) {
view.setClipBounds(finalClip);
view.setLeftTopRightBottom(endLeft, endTop, endRight,
endBottom);
}
}
});
}
anim = TransitionUtils.mergeAnimators(positionAnimator,
clipAnimator);
}
if (view.getParent() instanceof ViewGroup) {
final ViewGroup parent = (ViewGroup) view.getParent();
parent.suppressLayout(true);
TransitionListener transitionListener = new TransitionListenerAdapter() {
boolean mCanceled = false;
@Override
public void onTransitionCancel(Transition transition) {
parent.suppressLayout(false);
mCanceled = true;
}
@Override
public void onTransitionEnd(Transition transition) {
if (!mCanceled) {
parent.suppressLayout(false);
}
}
@Override
public void onTransitionPause(Transition transition) {
parent.suppressLayout(false);
}
@Override
public void onTransitionResume(Transition transition) {
parent.suppressLayout(true);
}
};
addListener(transitionListener);
}
return anim;
}
} else {
int startX = (Integer) startValues.values.get(PROPNAME_WINDOW_X);
int startY = (Integer) startValues.values.get(PROPNAME_WINDOW_Y);
int endX = (Integer) endValues.values.get(PROPNAME_WINDOW_X);
int endY = (Integer) endValues.values.get(PROPNAME_WINDOW_Y);
// TODO: also handle size changes: check bounds and animate size changes
if (startX != endX || startY != endY) {
sceneRoot.getLocationInWindow(tempLocation);
Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(),
Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
view.draw(canvas);
final BitmapDrawable drawable = new BitmapDrawable(bitmap);
final float transitionAlpha = view.getTransitionAlpha();
view.setTransitionAlpha(0);
sceneRoot.getOverlay().add(drawable);
Path topLeftPath = getPathMotion().getPath(startX - tempLocation[0],
startY - tempLocation[1], endX - tempLocation[0], endY - tempLocation[1]);
PropertyValuesHolder origin = PropertyValuesHolder.ofObject(
DRAWABLE_ORIGIN_PROPERTY, null, topLeftPath);
ObjectAnimator anim = ObjectAnimator.ofPropertyValuesHolder(drawable, origin);
anim.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
sceneRoot.getOverlay().remove(drawable);
view.setTransitionAlpha(transitionAlpha);
}
});
return anim;
}
}
return null;
}
private static class ViewBounds {
private int mLeft;
private int mTop;
private int mRight;
private int mBottom;
private boolean mIsTopLeftSet;
private boolean mIsBottomRightSet;
private View mView;
public ViewBounds(View view) {
mView = view;
}
public void setTopLeft(PointF topLeft) {
mLeft = Math.round(topLeft.x);
mTop = Math.round(topLeft.y);
mIsTopLeftSet = true;
if (mIsBottomRightSet) {
setLeftTopRightBottom();
}
}
public void setBottomRight(PointF bottomRight) {
mRight = Math.round(bottomRight.x);
mBottom = Math.round(bottomRight.y);
mIsBottomRightSet = true;
if (mIsTopLeftSet) {
setLeftTopRightBottom();
}
}
private void setLeftTopRightBottom() {
mView.setLeftTopRightBottom(mLeft, mTop, mRight, mBottom);
mIsTopLeftSet = false;
mIsBottomRightSet = false;
}
}
}