/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3.views;
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import static com.android.launcher3.anim.Interpolators.scrollInterpolatorForVelocity;
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import android.animation.Animator;
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import android.animation.AnimatorListenerAdapter;
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import android.animation.ObjectAnimator;
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import android.animation.PropertyValuesHolder;
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import android.content.Context;
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import android.util.AttributeSet;
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import android.util.Property;
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import android.view.MotionEvent;
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import android.view.View;
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import android.view.animation.Interpolator;
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import com.android.launcher3.AbstractFloatingView;
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import com.android.launcher3.Launcher;
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import com.android.launcher3.Utilities;
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import com.android.launcher3.anim.Interpolators;
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import com.android.launcher3.touch.SwipeDetector;
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/**
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* Extension of AbstractFloatingView with common methods for sliding in from bottom
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*/
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public abstract class AbstractSlideInView extends AbstractFloatingView
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implements SwipeDetector.Listener {
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protected static Property<AbstractSlideInView, Float> TRANSLATION_SHIFT =
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new Property<AbstractSlideInView, Float>(Float.class, "translationShift") {
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@Override
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public Float get(AbstractSlideInView view) {
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return view.mTranslationShift;
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}
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@Override
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public void set(AbstractSlideInView view, Float value) {
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view.setTranslationShift(value);
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}
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};
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protected static final float TRANSLATION_SHIFT_CLOSED = 1f;
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protected static final float TRANSLATION_SHIFT_OPENED = 0f;
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protected final Launcher mLauncher;
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protected final SwipeDetector mSwipeDetector;
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protected final ObjectAnimator mOpenCloseAnimator;
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protected View mContent;
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protected Interpolator mScrollInterpolator;
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// range [0, 1], 0=> completely open, 1=> completely closed
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protected float mTranslationShift = TRANSLATION_SHIFT_CLOSED;
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protected boolean mNoIntercept;
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public AbstractSlideInView(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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mLauncher = Launcher.getLauncher(context);
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mScrollInterpolator = Interpolators.SCROLL_CUBIC;
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mSwipeDetector = new SwipeDetector(context, this, SwipeDetector.VERTICAL);
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mOpenCloseAnimator = ObjectAnimator.ofPropertyValuesHolder(this);
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mOpenCloseAnimator.addListener(new AnimatorListenerAdapter() {
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@Override
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public void onAnimationEnd(Animator animation) {
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mSwipeDetector.finishedScrolling();
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announceAccessibilityChanges();
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}
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});
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}
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protected void setTranslationShift(float translationShift) {
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mTranslationShift = translationShift;
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mContent.setTranslationY(mTranslationShift * mContent.getHeight());
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}
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@Override
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public boolean onControllerInterceptTouchEvent(MotionEvent ev) {
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if (mNoIntercept) {
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return false;
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}
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int directionsToDetectScroll = mSwipeDetector.isIdleState() ?
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SwipeDetector.DIRECTION_NEGATIVE : 0;
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mSwipeDetector.setDetectableScrollConditions(
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directionsToDetectScroll, false);
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mSwipeDetector.onTouchEvent(ev);
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return mSwipeDetector.isDraggingOrSettling()
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|| !getPopupContainer().isEventOverView(mContent, ev);
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}
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@Override
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public boolean onControllerTouchEvent(MotionEvent ev) {
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mSwipeDetector.onTouchEvent(ev);
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if (ev.getAction() == MotionEvent.ACTION_UP && mSwipeDetector.isIdleState()
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&& !isOpeningAnimationRunning()) {
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// If we got ACTION_UP without ever starting swipe, close the panel.
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if (!getPopupContainer().isEventOverView(mContent, ev)) {
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close(true);
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}
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}
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return true;
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}
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private boolean isOpeningAnimationRunning() {
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return mIsOpen && mOpenCloseAnimator.isRunning();
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}
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/* SwipeDetector.Listener */
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@Override
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public void onDragStart(boolean start) { }
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@Override
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public boolean onDrag(float displacement) {
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float range = mContent.getHeight();
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displacement = Utilities.boundToRange(displacement, 0, range);
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setTranslationShift(displacement / range);
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return true;
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}
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@Override
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public void onDragEnd(float velocity, boolean fling) {
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if ((fling && velocity > 0) || mTranslationShift > 0.5f) {
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mScrollInterpolator = scrollInterpolatorForVelocity(velocity);
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mOpenCloseAnimator.setDuration(SwipeDetector.calculateDuration(
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velocity, TRANSLATION_SHIFT_CLOSED - mTranslationShift));
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close(true);
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} else {
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mOpenCloseAnimator.setValues(PropertyValuesHolder.ofFloat(
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TRANSLATION_SHIFT, TRANSLATION_SHIFT_OPENED));
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mOpenCloseAnimator.setDuration(
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SwipeDetector.calculateDuration(velocity, mTranslationShift))
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.setInterpolator(Interpolators.DEACCEL);
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mOpenCloseAnimator.start();
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}
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}
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protected void handleClose(boolean animate, long defaultDuration) {
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if (mIsOpen && !animate) {
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mOpenCloseAnimator.cancel();
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setTranslationShift(TRANSLATION_SHIFT_CLOSED);
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onCloseComplete();
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return;
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}
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if (!mIsOpen) {
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return;
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}
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mOpenCloseAnimator.setValues(
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PropertyValuesHolder.ofFloat(TRANSLATION_SHIFT, TRANSLATION_SHIFT_CLOSED));
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mOpenCloseAnimator.addListener(new AnimatorListenerAdapter() {
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@Override
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public void onAnimationEnd(Animator animation) {
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onCloseComplete();
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}
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});
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if (mSwipeDetector.isIdleState()) {
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mOpenCloseAnimator
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.setDuration(defaultDuration)
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.setInterpolator(Interpolators.ACCEL);
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} else {
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mOpenCloseAnimator.setInterpolator(mScrollInterpolator);
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}
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mOpenCloseAnimator.start();
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}
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protected void onCloseComplete() {
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mIsOpen = false;
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getPopupContainer().removeView(this);
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}
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protected BaseDragLayer getPopupContainer() {
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return mLauncher.getDragLayer();
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}
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}
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