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Diffstat (limited to 'java/com/android/bubble/ChangeOnScreenBounds.java')
-rw-r--r-- | java/com/android/bubble/ChangeOnScreenBounds.java | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/java/com/android/bubble/ChangeOnScreenBounds.java b/java/com/android/bubble/ChangeOnScreenBounds.java new file mode 100644 index 000000000..0a7adf637 --- /dev/null +++ b/java/com/android/bubble/ChangeOnScreenBounds.java @@ -0,0 +1,191 @@ +/* + * Copyright (C) 2017 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 com.android.bubble; + +import android.animation.Animator; +import android.animation.AnimatorSet; +import android.animation.ObjectAnimator; +import android.graphics.Path; +import android.graphics.PointF; +import android.graphics.Rect; +import android.support.annotation.VisibleForTesting; +import android.transition.Transition; +import android.transition.TransitionValues; +import android.util.Property; +import android.view.View; +import android.view.ViewGroup; + +/** Similar to {@link android.transition.ChangeBounds ChangeBounds} but works across windows */ +public class ChangeOnScreenBounds extends Transition { + + @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE) + static final String PROPNAME_BOUNDS = "bubble:changeScreenBounds:bounds"; + + @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE) + static final String PROPNAME_SCREEN_X = "bubble:changeScreenBounds:screenX"; + + @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE) + static final String PROPNAME_SCREEN_Y = "bubble:changeScreenBounds:screenY"; + + static final String PROPNAME_WIDTH = "bubble:changeScreenBounds:width"; + static final String PROPNAME_HEIGHT = "bubble:changeScreenBounds:height"; + + 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 final int[] tempLocation = new int[2]; + + @Override + public void captureStartValues(TransitionValues transitionValues) { + captureValuesWithSize(transitionValues); + } + + @Override + public void captureEndValues(TransitionValues transitionValues) { + captureValuesWithSize(transitionValues); + } + + /** + * Capture location (left and top) from {@code values.view} and size (width and height) from + * {@code values.values}. If size is not set, use the size of {@code values.view}. + */ + private void captureValuesWithSize(TransitionValues values) { + View view = values.view; + + if (view.isLaidOut() || view.getWidth() != 0 || view.getHeight() != 0) { + Integer width = (Integer) values.values.get(PROPNAME_WIDTH); + Integer height = (Integer) values.values.get(PROPNAME_HEIGHT); + + values.values.put( + PROPNAME_BOUNDS, + new Rect( + view.getLeft(), + view.getTop(), + width == null ? view.getRight() : view.getLeft() + width, + height == null ? view.getBottom() : view.getTop() + height)); + values.view.getLocationOnScreen(tempLocation); + values.values.put(PROPNAME_SCREEN_X, tempLocation[0]); + values.values.put(PROPNAME_SCREEN_Y, tempLocation[1]); + } + } + + @Override + public Animator createAnimator( + ViewGroup sceneRoot, TransitionValues startValues, TransitionValues endValues) { + Rect startBounds = (Rect) startValues.values.get(PROPNAME_BOUNDS); + Rect endBounds = (Rect) endValues.values.get(PROPNAME_BOUNDS); + + if (startBounds == null || endBounds == null) { + // start or end values were not captured, so don't animate. + return null; + } + + // Offset the startBounds by the difference in screen position + int startScreenX = (Integer) startValues.values.get(PROPNAME_SCREEN_X); + int startScreenY = (Integer) startValues.values.get(PROPNAME_SCREEN_Y); + int endScreenX = (Integer) endValues.values.get(PROPNAME_SCREEN_X); + int endScreenY = (Integer) endValues.values.get(PROPNAME_SCREEN_Y); + startBounds.offset(startScreenX - endScreenX, startScreenY - endScreenY); + + 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; + ViewBounds viewBounds = new ViewBounds(endValues.view); + viewBounds.setTopLeft(new PointF(startLeft, startTop)); + viewBounds.setBottomRight(new PointF(startRight, startBottom)); + + // Animate the top left and bottom right corners along a path + 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); + return set; + } + + private static class ViewBounds { + private int left; + private int top; + private int right; + private int bottom; + private final View view; + private int topLeftCalls; + private int bottomRightCalls; + + public ViewBounds(View view) { + this.view = view; + } + + public void setTopLeft(PointF topLeft) { + left = Math.round(topLeft.x); + top = Math.round(topLeft.y); + topLeftCalls++; + if (topLeftCalls == bottomRightCalls) { + updateLeftTopRightBottom(); + } + } + + public void setBottomRight(PointF bottomRight) { + right = Math.round(bottomRight.x); + bottom = Math.round(bottomRight.y); + bottomRightCalls++; + if (topLeftCalls == bottomRightCalls) { + updateLeftTopRightBottom(); + } + } + + private void updateLeftTopRightBottom() { + view.setLeft(left); + view.setTop(top); + view.setRight(right); + view.setBottom(bottom); + topLeftCalls = 0; + bottomRightCalls = 0; + } + } +} |