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/*
* 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.launcher3.views;
import static com.android.launcher3.anim.Interpolators.scrollInterpolatorForVelocity;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ObjectAnimator;
import android.animation.PropertyValuesHolder;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Property;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.Interpolator;
import com.android.launcher3.AbstractFloatingView;
import com.android.launcher3.Launcher;
import com.android.launcher3.Utilities;
import com.android.launcher3.anim.Interpolators;
import com.android.launcher3.touch.SwipeDetector;
/**
* Extension of AbstractFloatingView with common methods for sliding in from bottom
*/
public abstract class AbstractSlideInView extends AbstractFloatingView
implements SwipeDetector.Listener {
protected static Property<AbstractSlideInView, Float> TRANSLATION_SHIFT =
new Property<AbstractSlideInView, Float>(Float.class, "translationShift") {
@Override
public Float get(AbstractSlideInView view) {
return view.mTranslationShift;
}
@Override
public void set(AbstractSlideInView view, Float value) {
view.setTranslationShift(value);
}
};
protected static final float TRANSLATION_SHIFT_CLOSED = 1f;
protected static final float TRANSLATION_SHIFT_OPENED = 0f;
protected final Launcher mLauncher;
protected final SwipeDetector mSwipeDetector;
protected final ObjectAnimator mOpenCloseAnimator;
protected View mContent;
protected Interpolator mScrollInterpolator;
// range [0, 1], 0=> completely open, 1=> completely closed
protected float mTranslationShift = TRANSLATION_SHIFT_CLOSED;
protected boolean mNoIntercept;
public AbstractSlideInView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mLauncher = Launcher.getLauncher(context);
mScrollInterpolator = Interpolators.SCROLL_CUBIC;
mSwipeDetector = new SwipeDetector(context, this, SwipeDetector.VERTICAL);
mOpenCloseAnimator = ObjectAnimator.ofPropertyValuesHolder(this);
mOpenCloseAnimator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mSwipeDetector.finishedScrolling();
announceAccessibilityChanges();
}
});
}
protected void setTranslationShift(float translationShift) {
mTranslationShift = translationShift;
mContent.setTranslationY(mTranslationShift * mContent.getHeight());
}
@Override
public boolean onControllerInterceptTouchEvent(MotionEvent ev) {
if (mNoIntercept) {
return false;
}
int directionsToDetectScroll = mSwipeDetector.isIdleState() ?
SwipeDetector.DIRECTION_NEGATIVE : 0;
mSwipeDetector.setDetectableScrollConditions(
directionsToDetectScroll, false);
mSwipeDetector.onTouchEvent(ev);
return mSwipeDetector.isDraggingOrSettling()
|| !getPopupContainer().isEventOverView(mContent, ev);
}
@Override
public boolean onControllerTouchEvent(MotionEvent ev) {
mSwipeDetector.onTouchEvent(ev);
if (ev.getAction() == MotionEvent.ACTION_UP && mSwipeDetector.isIdleState()
&& !isOpeningAnimationRunning()) {
// If we got ACTION_UP without ever starting swipe, close the panel.
if (!getPopupContainer().isEventOverView(mContent, ev)) {
close(true);
}
}
return true;
}
private boolean isOpeningAnimationRunning() {
return mIsOpen && mOpenCloseAnimator.isRunning();
}
/* SwipeDetector.Listener */
@Override
public void onDragStart(boolean start) { }
@Override
public boolean onDrag(float displacement) {
float range = mContent.getHeight();
displacement = Utilities.boundToRange(displacement, 0, range);
setTranslationShift(displacement / range);
return true;
}
@Override
public void onDragEnd(float velocity, boolean fling) {
if ((fling && velocity > 0) || mTranslationShift > 0.5f) {
mScrollInterpolator = scrollInterpolatorForVelocity(velocity);
mOpenCloseAnimator.setDuration(SwipeDetector.calculateDuration(
velocity, TRANSLATION_SHIFT_CLOSED - mTranslationShift));
close(true);
} else {
mOpenCloseAnimator.setValues(PropertyValuesHolder.ofFloat(
TRANSLATION_SHIFT, TRANSLATION_SHIFT_OPENED));
mOpenCloseAnimator.setDuration(
SwipeDetector.calculateDuration(velocity, mTranslationShift))
.setInterpolator(Interpolators.DEACCEL);
mOpenCloseAnimator.start();
}
}
protected void handleClose(boolean animate, long defaultDuration) {
if (!mIsOpen) {
return;
}
if (!animate) {
mOpenCloseAnimator.cancel();
setTranslationShift(TRANSLATION_SHIFT_CLOSED);
onCloseComplete();
return;
}
mOpenCloseAnimator.setValues(
PropertyValuesHolder.ofFloat(TRANSLATION_SHIFT, TRANSLATION_SHIFT_CLOSED));
mOpenCloseAnimator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
onCloseComplete();
}
});
if (mSwipeDetector.isIdleState()) {
mOpenCloseAnimator
.setDuration(defaultDuration)
.setInterpolator(Interpolators.ACCEL);
} else {
mOpenCloseAnimator.setInterpolator(mScrollInterpolator);
}
mOpenCloseAnimator.start();
}
protected void onCloseComplete() {
mIsOpen = false;
getPopupContainer().removeView(this);
}
protected BaseDragLayer getPopupContainer() {
return mLauncher.getDragLayer();
}
}
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