diff options
author | Treehugger Robot <treehugger-gerrit@google.com> | 2017-08-31 16:17:04 +0000 |
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committer | Gerrit Code Review <noreply-gerritcodereview@google.com> | 2017-08-31 16:17:04 +0000 |
commit | c39ea3c55fac807c0b98aabdf56c70dc8a49036c (patch) | |
tree | e282668a9587cf6c1ec7b604dea860400c75c6c7 /java/com/android/dialershared/bubble/MoveHandler.java | |
parent | 68038172793ee0e2ab3e2e56ddfbeb82879d1f58 (diff) | |
parent | 2ca4318cc1ee57dda907ba2069bd61d162b1baef (diff) |
Merge "Update Dialer source to latest internal Google revision."
Diffstat (limited to 'java/com/android/dialershared/bubble/MoveHandler.java')
-rw-r--r-- | java/com/android/dialershared/bubble/MoveHandler.java | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/java/com/android/dialershared/bubble/MoveHandler.java b/java/com/android/dialershared/bubble/MoveHandler.java new file mode 100644 index 000000000..33507efd6 --- /dev/null +++ b/java/com/android/dialershared/bubble/MoveHandler.java @@ -0,0 +1,280 @@ +/* + * 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.dialershared.bubble; + +import android.content.Context; +import android.graphics.Point; +import android.support.animation.FloatPropertyCompat; +import android.support.animation.SpringAnimation; +import android.support.animation.SpringForce; +import android.support.annotation.NonNull; +import android.view.Gravity; +import android.view.MotionEvent; +import android.view.VelocityTracker; +import android.view.View; +import android.view.View.OnTouchListener; +import android.view.ViewConfiguration; +import android.view.WindowManager; +import android.view.WindowManager.LayoutParams; +import android.widget.Scroller; + +/** Handles touches and manages moving the bubble in response */ +class MoveHandler implements OnTouchListener { + + // Amount the ViewConfiguration's minFlingVelocity will be scaled by for our own minVelocity + private static final int MIN_FLING_VELOCITY_FACTOR = 8; + // The friction multiplier to control how slippery the bubble is when flung + private static final float SCROLL_FRICTION_MULTIPLIER = 4f; + + private final Context context; + private final WindowManager windowManager; + private final Bubble bubble; + private final int minX; + private final int minY; + private final int maxX; + private final int maxY; + private final int bubbleSize; + private final int shadowPaddingSize; + private final float touchSlopSquared; + + private boolean isMoving; + private float firstX; + private float firstY; + + private SpringAnimation moveXAnimation; + private SpringAnimation moveYAnimation; + private VelocityTracker velocityTracker; + private Scroller scroller; + + private static float clamp(float value, float min, float max) { + return Math.min(max, Math.max(min, value)); + } + + // Handles the left/right gravity conversion and centering + private final FloatPropertyCompat<WindowManager.LayoutParams> xProperty = + new FloatPropertyCompat<LayoutParams>("xProperty") { + @Override + public float getValue(LayoutParams windowParams) { + int realX = windowParams.x; + realX = realX + bubbleSize / 2; + realX = realX + shadowPaddingSize; + if (relativeToRight(windowParams)) { + int displayWidth = context.getResources().getDisplayMetrics().widthPixels; + realX = displayWidth - realX; + } + return clamp(realX, minX, maxX); + } + + @Override + public void setValue(LayoutParams windowParams, float value) { + boolean wasOnRight = (windowParams.gravity & Gravity.RIGHT) == Gravity.RIGHT; + int displayWidth = context.getResources().getDisplayMetrics().widthPixels; + boolean onRight; + Integer gravityOverride = bubble.getGravityOverride(); + if (gravityOverride == null) { + onRight = value > displayWidth / 2; + } else { + onRight = (gravityOverride & Gravity.RIGHT) == Gravity.RIGHT; + } + int centeringOffset = bubbleSize / 2 + shadowPaddingSize; + windowParams.x = + (int) (onRight ? (displayWidth - value - centeringOffset) : value - centeringOffset); + windowParams.gravity = Gravity.TOP | (onRight ? Gravity.RIGHT : Gravity.LEFT); + if (wasOnRight != onRight) { + bubble.onLeftRightSwitch(onRight); + } + if (bubble.isVisible()) { + windowManager.updateViewLayout(bubble.getRootView(), windowParams); + } + } + }; + + private final FloatPropertyCompat<WindowManager.LayoutParams> yProperty = + new FloatPropertyCompat<LayoutParams>("yProperty") { + @Override + public float getValue(LayoutParams object) { + return clamp(object.y + bubbleSize + shadowPaddingSize, minY, maxY); + } + + @Override + public void setValue(LayoutParams object, float value) { + object.y = (int) value - bubbleSize - shadowPaddingSize; + if (bubble.isVisible()) { + windowManager.updateViewLayout(bubble.getRootView(), object); + } + } + }; + + public MoveHandler(@NonNull View targetView, @NonNull Bubble bubble) { + this.bubble = bubble; + context = targetView.getContext(); + windowManager = context.getSystemService(WindowManager.class); + + bubbleSize = context.getResources().getDimensionPixelSize(R.dimen.bubble_size); + shadowPaddingSize = + context.getResources().getDimensionPixelOffset(R.dimen.bubble_shadow_padding_size); + minX = + context.getResources().getDimensionPixelOffset(R.dimen.bubble_safe_margin_x) + + bubbleSize / 2; + minY = + context.getResources().getDimensionPixelOffset(R.dimen.bubble_safe_margin_y) + + bubbleSize / 2; + maxX = context.getResources().getDisplayMetrics().widthPixels - minX; + maxY = context.getResources().getDisplayMetrics().heightPixels - minY; + + // Squared because it will be compared against the square of the touch delta. This is more + // efficient than needing to take a square root. + touchSlopSquared = (float) Math.pow(ViewConfiguration.get(context).getScaledTouchSlop(), 2); + + targetView.setOnTouchListener(this); + } + + public boolean isMoving() { + return isMoving; + } + + public void undoGravityOverride() { + LayoutParams windowParams = bubble.getWindowParams(); + xProperty.setValue(windowParams, xProperty.getValue(windowParams)); + } + + public void snapToBounds() { + ensureSprings(); + + moveXAnimation.animateToFinalPosition(relativeToRight(bubble.getWindowParams()) ? maxX : minX); + moveYAnimation.animateToFinalPosition(yProperty.getValue(bubble.getWindowParams())); + } + + @Override + public boolean onTouch(View v, MotionEvent event) { + float eventX = event.getRawX(); + float eventY = event.getRawY(); + switch (event.getActionMasked()) { + case MotionEvent.ACTION_DOWN: + firstX = eventX; + firstY = eventY; + velocityTracker = VelocityTracker.obtain(); + break; + case MotionEvent.ACTION_MOVE: + if (isMoving || hasExceededTouchSlop(event)) { + if (!isMoving) { + isMoving = true; + bubble.onMoveStart(); + } + + ensureSprings(); + + moveXAnimation.animateToFinalPosition(clamp(eventX, minX, maxX)); + moveYAnimation.animateToFinalPosition(clamp(eventY, minY, maxY)); + } + + velocityTracker.addMovement(event); + break; + case MotionEvent.ACTION_UP: + if (isMoving) { + ViewConfiguration viewConfiguration = ViewConfiguration.get(context); + velocityTracker.computeCurrentVelocity( + 1000, viewConfiguration.getScaledMaximumFlingVelocity()); + float xVelocity = velocityTracker.getXVelocity(); + float yVelocity = velocityTracker.getYVelocity(); + boolean isFling = isFling(xVelocity, yVelocity); + + if (isFling) { + Point target = + findTarget( + xVelocity, + yVelocity, + (int) xProperty.getValue(bubble.getWindowParams()), + (int) yProperty.getValue(bubble.getWindowParams())); + + moveXAnimation.animateToFinalPosition(target.x); + moveYAnimation.animateToFinalPosition(target.y); + } else { + snapX(); + } + isMoving = false; + bubble.onMoveFinish(); + } else { + v.performClick(); + bubble.primaryButtonClick(); + } + break; + default: // fall out + } + return true; + } + + private void ensureSprings() { + if (moveXAnimation == null) { + moveXAnimation = new SpringAnimation(bubble.getWindowParams(), xProperty); + moveXAnimation.setSpring(new SpringForce()); + moveXAnimation.getSpring().setDampingRatio(SpringForce.DAMPING_RATIO_NO_BOUNCY); + } + + if (moveYAnimation == null) { + moveYAnimation = new SpringAnimation(bubble.getWindowParams(), yProperty); + moveYAnimation.setSpring(new SpringForce()); + moveYAnimation.getSpring().setDampingRatio(SpringForce.DAMPING_RATIO_NO_BOUNCY); + } + } + + private Point findTarget(float xVelocity, float yVelocity, int startX, int startY) { + if (scroller == null) { + scroller = new Scroller(context); + scroller.setFriction(ViewConfiguration.getScrollFriction() * SCROLL_FRICTION_MULTIPLIER); + } + + // Find where a fling would end vertically + scroller.fling(startX, startY, (int) xVelocity, (int) yVelocity, minX, maxX, minY, maxY); + int targetY = scroller.getFinalY(); + scroller.abortAnimation(); + + // If the x component of the velocity is above the minimum fling velocity, use velocity to + // determine edge. Otherwise use its starting position + boolean pullRight = isFling(xVelocity, 0) ? xVelocity > 0 : isOnRightHalf(startX); + return new Point(pullRight ? maxX : minX, targetY); + } + + private boolean isFling(float xVelocity, float yVelocity) { + int minFlingVelocity = + ViewConfiguration.get(context).getScaledMinimumFlingVelocity() * MIN_FLING_VELOCITY_FACTOR; + return getMagnitudeSquared(xVelocity, yVelocity) > minFlingVelocity * minFlingVelocity; + } + + private boolean isOnRightHalf(float currentX) { + return currentX > (minX + maxX) / 2; + } + + private void snapX() { + // Check if x value is closer to min or max + boolean pullRight = isOnRightHalf(xProperty.getValue(bubble.getWindowParams())); + moveXAnimation.animateToFinalPosition(pullRight ? maxX : minX); + } + + private boolean relativeToRight(LayoutParams windowParams) { + return (windowParams.gravity & Gravity.RIGHT) == Gravity.RIGHT; + } + + private boolean hasExceededTouchSlop(MotionEvent event) { + return getMagnitudeSquared(event.getRawX() - firstX, event.getRawY() - firstY) + > touchSlopSquared; + } + + private float getMagnitudeSquared(float deltaX, float deltaY) { + return deltaX * deltaX + deltaY * deltaY; + } +} |