Merge remote-tracking branch 'origin/master'
This commit is contained in:
Weblate
commit
ee59a34315
1 changed files with 848 additions and 0 deletions
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@ -0,0 +1,848 @@
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/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* 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
|
||||
*
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||||
* http://www.apache.org/licenses/LICENSE-2.0
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||||
*
|
||||
* 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.
|
||||
*/
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||||
|
||||
package net.osmand.plus.widgets.tools;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.os.Parcel;
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import android.os.Parcelable;
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||||
import android.support.annotation.IntDef;
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import android.support.annotation.NonNull;
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import android.support.annotation.RestrictTo;
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import android.support.annotation.VisibleForTesting;
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import android.support.design.R;
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import android.support.design.widget.CoordinatorLayout;
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import android.support.v4.math.MathUtils;
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import android.support.v4.view.AbsSavedState;
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import android.support.v4.view.ViewCompat;
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import android.support.v4.widget.ViewDragHelper;
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import android.util.AttributeSet;
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import android.util.TypedValue;
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||||
import android.view.MotionEvent;
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import android.view.VelocityTracker;
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import android.view.View;
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import android.view.ViewConfiguration;
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import android.view.ViewGroup;
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import android.view.ViewParent;
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||||
|
||||
import java.lang.annotation.Retention;
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||||
import java.lang.annotation.RetentionPolicy;
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||||
import java.lang.ref.WeakReference;
|
||||
|
||||
import static android.support.annotation.RestrictTo.Scope.LIBRARY_GROUP;
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|
||||
|
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/**
|
||||
* An interaction behavior plugin for a child view of {@link CoordinatorLayout} to make it work as
|
||||
* a bottom sheet.
|
||||
*/
|
||||
public class ExtendedBottomSheetBehavior<V extends View> extends CoordinatorLayout.Behavior<V> {
|
||||
|
||||
/**
|
||||
* Callback for monitoring events about bottom sheets.
|
||||
*/
|
||||
public abstract static class BottomSheetCallback {
|
||||
|
||||
/**
|
||||
* Called when the bottom sheet changes its state.
|
||||
*
|
||||
* @param bottomSheet The bottom sheet view.
|
||||
* @param newState The new state. This will be one of {@link #STATE_DRAGGING},
|
||||
* {@link #STATE_SETTLING}, {@link #STATE_EXPANDED},
|
||||
* {@link #STATE_COLLAPSED}, or {@link #STATE_HIDDEN}.
|
||||
*/
|
||||
public abstract void onStateChanged(@NonNull View bottomSheet, @State int newState);
|
||||
|
||||
/**
|
||||
* Called when the bottom sheet is being dragged.
|
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*
|
||||
* @param bottomSheet The bottom sheet view.
|
||||
* @param slideOffset The new offset of this bottom sheet within [-1,1] range. Offset
|
||||
* increases as this bottom sheet is moving upward. From 0 to 1 the sheet
|
||||
* is between collapsed and expanded states and from -1 to 0 it is
|
||||
* between hidden and collapsed states.
|
||||
*/
|
||||
public abstract void onSlide(@NonNull View bottomSheet, float slideOffset);
|
||||
}
|
||||
|
||||
/**
|
||||
* The bottom sheet is dragging.
|
||||
*/
|
||||
public static final int STATE_DRAGGING = 1;
|
||||
|
||||
/**
|
||||
* The bottom sheet is settling.
|
||||
*/
|
||||
public static final int STATE_SETTLING = 2;
|
||||
|
||||
/**
|
||||
* The bottom sheet is expanded.
|
||||
*/
|
||||
public static final int STATE_EXPANDED = 3;
|
||||
|
||||
/**
|
||||
* The bottom sheet is collapsed.
|
||||
*/
|
||||
public static final int STATE_COLLAPSED = 4;
|
||||
|
||||
/**
|
||||
* The bottom sheet is hidden.
|
||||
*/
|
||||
public static final int STATE_HIDDEN = 5;
|
||||
|
||||
/**
|
||||
* The bottom sheet is manually opened to a certain height.
|
||||
*/
|
||||
public static final int STATE_MANUALLY_MOVED = 6;
|
||||
|
||||
/**
|
||||
* @hide
|
||||
*/
|
||||
@RestrictTo(LIBRARY_GROUP)
|
||||
@IntDef({STATE_EXPANDED, STATE_COLLAPSED, STATE_DRAGGING, STATE_SETTLING, STATE_HIDDEN, STATE_MANUALLY_MOVED})
|
||||
@Retention(RetentionPolicy.SOURCE)
|
||||
public @interface State {
|
||||
}
|
||||
|
||||
/**
|
||||
* Peek at the 16:9 ratio keyline of its parent.
|
||||
* <p>
|
||||
* <p>This can be used as a parameter for {@link #setPeekHeight(int)}.
|
||||
* {@link #getPeekHeight()} will return this when the value is set.</p>
|
||||
*/
|
||||
public static final int PEEK_HEIGHT_AUTO = -1;
|
||||
|
||||
private static final float HIDE_THRESHOLD = 0.5f;
|
||||
|
||||
private static final float HIDE_FRICTION = 0.1f;
|
||||
|
||||
private static final float MIN_VELOCITY_FOR_SLIDE = 2000;
|
||||
|
||||
private float mMaximumVelocity;
|
||||
|
||||
private int mPeekHeight;
|
||||
|
||||
private boolean mPeekHeightAuto;
|
||||
|
||||
private int mPeekHeightMin;
|
||||
|
||||
int mMinOffset;
|
||||
|
||||
int mMaxOffset;
|
||||
|
||||
boolean mHideable;
|
||||
|
||||
private boolean mSkipCollapsed;
|
||||
|
||||
@State
|
||||
int mState = STATE_COLLAPSED;
|
||||
|
||||
ViewDragHelper mViewDragHelper;
|
||||
|
||||
private boolean mIgnoreEvents;
|
||||
|
||||
private int mLastNestedScrollDy;
|
||||
|
||||
private boolean mNestedScrolled;
|
||||
|
||||
int mParentHeight;
|
||||
|
||||
WeakReference<V> mViewRef;
|
||||
|
||||
WeakReference<View> mNestedScrollingChildRef;
|
||||
|
||||
private BottomSheetCallback mCallback;
|
||||
|
||||
private VelocityTracker mVelocityTracker;
|
||||
|
||||
int mActivePointerId;
|
||||
|
||||
private int mInitialY;
|
||||
|
||||
boolean mTouchingScrollingChild;
|
||||
|
||||
/**
|
||||
* Default constructor for instantiating BottomSheetBehaviors.
|
||||
*/
|
||||
public ExtendedBottomSheetBehavior() {
|
||||
}
|
||||
|
||||
/**
|
||||
* Default constructor for inflating BottomSheetBehaviors from layout.
|
||||
*
|
||||
* @param context The {@link Context}.
|
||||
* @param attrs The {@link AttributeSet}.
|
||||
*/
|
||||
public ExtendedBottomSheetBehavior(Context context, AttributeSet attrs) {
|
||||
super(context, attrs);
|
||||
TypedArray a = context.obtainStyledAttributes(attrs,
|
||||
R.styleable.BottomSheetBehavior_Layout);
|
||||
TypedValue value = a.peekValue(R.styleable.BottomSheetBehavior_Layout_behavior_peekHeight);
|
||||
if (value != null && value.data == PEEK_HEIGHT_AUTO) {
|
||||
setPeekHeight(value.data);
|
||||
} else {
|
||||
setPeekHeight(a.getDimensionPixelSize(
|
||||
R.styleable.BottomSheetBehavior_Layout_behavior_peekHeight, PEEK_HEIGHT_AUTO));
|
||||
}
|
||||
setHideable(a.getBoolean(R.styleable.BottomSheetBehavior_Layout_behavior_hideable, false));
|
||||
setSkipCollapsed(a.getBoolean(R.styleable.BottomSheetBehavior_Layout_behavior_skipCollapsed,
|
||||
false));
|
||||
a.recycle();
|
||||
ViewConfiguration configuration = ViewConfiguration.get(context);
|
||||
mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
|
||||
}
|
||||
|
||||
@Override
|
||||
public Parcelable onSaveInstanceState(CoordinatorLayout parent, V child) {
|
||||
return new SavedState(super.onSaveInstanceState(parent, child), mState);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onRestoreInstanceState(CoordinatorLayout parent, V child, Parcelable state) {
|
||||
SavedState ss = (SavedState) state;
|
||||
super.onRestoreInstanceState(parent, child, ss.getSuperState());
|
||||
// Intermediate states are restored as collapsed state
|
||||
if (ss.state == STATE_DRAGGING || ss.state == STATE_SETTLING) {
|
||||
mState = STATE_COLLAPSED;
|
||||
} else {
|
||||
mState = ss.state;
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) {
|
||||
if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) {
|
||||
ViewCompat.setFitsSystemWindows(child, true);
|
||||
}
|
||||
int savedTop = child.getTop();
|
||||
// First let the parent lay it out
|
||||
parent.onLayoutChild(child, layoutDirection);
|
||||
// Offset the bottom sheet
|
||||
mParentHeight = parent.getHeight();
|
||||
int peekHeight;
|
||||
if (mPeekHeightAuto) {
|
||||
if (mPeekHeightMin == 0) {
|
||||
mPeekHeightMin = parent.getResources().getDimensionPixelSize(
|
||||
R.dimen.design_bottom_sheet_peek_height_min);
|
||||
}
|
||||
peekHeight = Math.max(mPeekHeightMin, mParentHeight - parent.getWidth() * 9 / 16);
|
||||
} else {
|
||||
peekHeight = mPeekHeight;
|
||||
}
|
||||
mMinOffset = Math.max(0, mParentHeight - child.getHeight());
|
||||
mMaxOffset = Math.max(mParentHeight - peekHeight, mMinOffset);
|
||||
if (mState == STATE_EXPANDED) {
|
||||
ViewCompat.offsetTopAndBottom(child, mMinOffset);
|
||||
} else if (mHideable && mState == STATE_HIDDEN) {
|
||||
ViewCompat.offsetTopAndBottom(child, mParentHeight);
|
||||
} else if (mState == STATE_COLLAPSED) {
|
||||
ViewCompat.offsetTopAndBottom(child, mMaxOffset);
|
||||
} else if (mState == STATE_DRAGGING || mState == STATE_SETTLING) {
|
||||
ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop());
|
||||
}
|
||||
if (mViewDragHelper == null) {
|
||||
mViewDragHelper = ViewDragHelper.create(parent, mDragCallback);
|
||||
}
|
||||
mViewRef = new WeakReference<>(child);
|
||||
mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
|
||||
return true;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean onInterceptTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) {
|
||||
if (!child.isShown()) {
|
||||
mIgnoreEvents = true;
|
||||
return false;
|
||||
}
|
||||
int action = event.getActionMasked();
|
||||
// Record the velocity
|
||||
if (action == MotionEvent.ACTION_DOWN) {
|
||||
reset();
|
||||
}
|
||||
if (mVelocityTracker == null) {
|
||||
mVelocityTracker = VelocityTracker.obtain();
|
||||
}
|
||||
mVelocityTracker.addMovement(event);
|
||||
switch (action) {
|
||||
case MotionEvent.ACTION_UP:
|
||||
case MotionEvent.ACTION_CANCEL:
|
||||
mTouchingScrollingChild = false;
|
||||
mActivePointerId = MotionEvent.INVALID_POINTER_ID;
|
||||
// Reset the ignore flag
|
||||
if (mIgnoreEvents) {
|
||||
mIgnoreEvents = false;
|
||||
return false;
|
||||
}
|
||||
break;
|
||||
case MotionEvent.ACTION_DOWN:
|
||||
int initialX = (int) event.getX();
|
||||
mInitialY = (int) event.getY();
|
||||
View scroll = mNestedScrollingChildRef != null
|
||||
? mNestedScrollingChildRef.get() : null;
|
||||
if (scroll != null && parent.isPointInChildBounds(scroll, initialX, mInitialY)) {
|
||||
mActivePointerId = event.getPointerId(event.getActionIndex());
|
||||
mTouchingScrollingChild = true;
|
||||
}
|
||||
mIgnoreEvents = mActivePointerId == MotionEvent.INVALID_POINTER_ID &&
|
||||
!parent.isPointInChildBounds(child, initialX, mInitialY);
|
||||
break;
|
||||
}
|
||||
if (!mIgnoreEvents && mViewDragHelper.shouldInterceptTouchEvent(event)) {
|
||||
return true;
|
||||
}
|
||||
// We have to handle cases that the ViewDragHelper does not capture the bottom sheet because
|
||||
// it is not the top most view of its parent. This is not necessary when the touch event is
|
||||
// happening over the scrolling content as nested scrolling logic handles that case.
|
||||
View scroll = mNestedScrollingChildRef.get();
|
||||
return action == MotionEvent.ACTION_MOVE && scroll != null &&
|
||||
!mIgnoreEvents && mState != STATE_DRAGGING &&
|
||||
!parent.isPointInChildBounds(scroll, (int) event.getX(), (int) event.getY()) &&
|
||||
Math.abs(mInitialY - event.getY()) > mViewDragHelper.getTouchSlop();
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean onTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) {
|
||||
if (!child.isShown()) {
|
||||
return false;
|
||||
}
|
||||
int action = event.getActionMasked();
|
||||
if (mState == STATE_DRAGGING && action == MotionEvent.ACTION_DOWN) {
|
||||
return true;
|
||||
}
|
||||
mViewDragHelper.processTouchEvent(event);
|
||||
// Record the velocity
|
||||
if (action == MotionEvent.ACTION_DOWN) {
|
||||
reset();
|
||||
}
|
||||
if (mVelocityTracker == null) {
|
||||
mVelocityTracker = VelocityTracker.obtain();
|
||||
}
|
||||
mVelocityTracker.addMovement(event);
|
||||
// The ViewDragHelper tries to capture only the top-most View. We have to explicitly tell it
|
||||
// to capture the bottom sheet in case it is not captured and the touch slop is passed.
|
||||
if (action == MotionEvent.ACTION_MOVE && !mIgnoreEvents) {
|
||||
if (Math.abs(mInitialY - event.getY()) > mViewDragHelper.getTouchSlop()) {
|
||||
mViewDragHelper.captureChildView(child, event.getPointerId(event.getActionIndex()));
|
||||
}
|
||||
}
|
||||
return !mIgnoreEvents;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, V child,
|
||||
View directTargetChild, View target, int nestedScrollAxes) {
|
||||
mLastNestedScrollDy = 0;
|
||||
mNestedScrolled = false;
|
||||
return (nestedScrollAxes & ViewCompat.SCROLL_AXIS_VERTICAL) != 0;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dx,
|
||||
int dy, int[] consumed) {
|
||||
View scrollingChild = mNestedScrollingChildRef.get();
|
||||
if (target != scrollingChild) {
|
||||
return;
|
||||
}
|
||||
int currentTop = child.getTop();
|
||||
int newTop = currentTop - dy;
|
||||
if (dy > 0) { // Upward
|
||||
if (newTop < mMinOffset) {
|
||||
consumed[1] = currentTop - mMinOffset;
|
||||
ViewCompat.offsetTopAndBottom(child, -consumed[1]);
|
||||
setStateInternal(STATE_EXPANDED);
|
||||
} else {
|
||||
consumed[1] = dy;
|
||||
ViewCompat.offsetTopAndBottom(child, -dy);
|
||||
setStateInternal(STATE_DRAGGING);
|
||||
}
|
||||
} else if (dy < 0) { // Downward
|
||||
if (!target.canScrollVertically(-1)) {
|
||||
if (newTop <= mMaxOffset || mHideable) {
|
||||
consumed[1] = dy;
|
||||
ViewCompat.offsetTopAndBottom(child, -dy);
|
||||
setStateInternal(STATE_DRAGGING);
|
||||
} else {
|
||||
consumed[1] = currentTop - mMaxOffset;
|
||||
ViewCompat.offsetTopAndBottom(child, -consumed[1]);
|
||||
setStateInternal(STATE_COLLAPSED);
|
||||
}
|
||||
}
|
||||
}
|
||||
dispatchOnSlide(child.getTop());
|
||||
mLastNestedScrollDy = dy;
|
||||
mNestedScrolled = true;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onStopNestedScroll(CoordinatorLayout coordinatorLayout, V child, View target) {
|
||||
if (child.getTop() == mMinOffset) {
|
||||
setStateInternal(STATE_EXPANDED);
|
||||
return;
|
||||
}
|
||||
if (mNestedScrollingChildRef == null || target != mNestedScrollingChildRef.get()
|
||||
|| !mNestedScrolled) {
|
||||
return;
|
||||
}
|
||||
int top;
|
||||
int targetState;
|
||||
if (mLastNestedScrollDy > 0) {
|
||||
if (Math.abs(getYVelocity()) > MIN_VELOCITY_FOR_SLIDE) {
|
||||
top = mMinOffset;
|
||||
targetState = STATE_EXPANDED;
|
||||
} else {
|
||||
top = child.getTop();
|
||||
targetState = STATE_MANUALLY_MOVED;
|
||||
}
|
||||
} else if (mHideable && shouldHide(child, getYVelocity())) {
|
||||
top = mParentHeight;
|
||||
targetState = STATE_HIDDEN;
|
||||
} else if (mLastNestedScrollDy == 0) {
|
||||
int currentTop = child.getTop();
|
||||
if (Math.abs(currentTop - mMinOffset) < Math.abs(currentTop - mMaxOffset)) {
|
||||
top = mMinOffset;
|
||||
targetState = STATE_EXPANDED;
|
||||
} else {
|
||||
top = mMaxOffset;
|
||||
targetState = STATE_COLLAPSED;
|
||||
}
|
||||
} else {
|
||||
if (Math.abs(getYVelocity()) > MIN_VELOCITY_FOR_SLIDE) {
|
||||
top = mMaxOffset;
|
||||
targetState = STATE_COLLAPSED;
|
||||
} else {
|
||||
top = child.getTop();
|
||||
targetState = STATE_MANUALLY_MOVED;
|
||||
}
|
||||
}
|
||||
if (mViewDragHelper.smoothSlideViewTo(child, child.getLeft(), top)) {
|
||||
setStateInternal(STATE_SETTLING);
|
||||
ViewCompat.postOnAnimation(child, new SettleRunnable(child, targetState));
|
||||
} else {
|
||||
setStateInternal(targetState);
|
||||
}
|
||||
mNestedScrolled = false;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean onNestedPreFling(CoordinatorLayout coordinatorLayout, V child, View target,
|
||||
float velocityX, float velocityY) {
|
||||
return target == mNestedScrollingChildRef.get() &&
|
||||
(mState != STATE_EXPANDED ||
|
||||
super.onNestedPreFling(coordinatorLayout, child, target,
|
||||
velocityX, velocityY));
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the height of the bottom sheet when it is collapsed.
|
||||
*
|
||||
* @param peekHeight The height of the collapsed bottom sheet in pixels, or
|
||||
* {@link #PEEK_HEIGHT_AUTO} to configure the sheet to peek automatically
|
||||
* at 16:9 ratio keyline.
|
||||
* @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_peekHeight
|
||||
*/
|
||||
public final void setPeekHeight(int peekHeight) {
|
||||
boolean layout = false;
|
||||
if (peekHeight == PEEK_HEIGHT_AUTO) {
|
||||
if (!mPeekHeightAuto) {
|
||||
mPeekHeightAuto = true;
|
||||
layout = true;
|
||||
}
|
||||
} else if (mPeekHeightAuto || mPeekHeight != peekHeight) {
|
||||
mPeekHeightAuto = false;
|
||||
mPeekHeight = Math.max(0, peekHeight);
|
||||
mMaxOffset = mParentHeight - peekHeight;
|
||||
layout = true;
|
||||
}
|
||||
if (layout && mState == STATE_COLLAPSED && mViewRef != null) {
|
||||
V view = mViewRef.get();
|
||||
if (view != null) {
|
||||
view.requestLayout();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets the height of the bottom sheet when it is collapsed.
|
||||
*
|
||||
* @return The height of the collapsed bottom sheet in pixels, or {@link #PEEK_HEIGHT_AUTO}
|
||||
* if the sheet is configured to peek automatically at 16:9 ratio keyline
|
||||
* @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_peekHeight
|
||||
*/
|
||||
public final int getPeekHeight() {
|
||||
return mPeekHeightAuto ? PEEK_HEIGHT_AUTO : mPeekHeight;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets whether this bottom sheet can hide when it is swiped down.
|
||||
*
|
||||
* @param hideable {@code true} to make this bottom sheet hideable.
|
||||
* @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_hideable
|
||||
*/
|
||||
public void setHideable(boolean hideable) {
|
||||
mHideable = hideable;
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets whether this bottom sheet can hide when it is swiped down.
|
||||
*
|
||||
* @return {@code true} if this bottom sheet can hide.
|
||||
* @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_hideable
|
||||
*/
|
||||
public boolean isHideable() {
|
||||
return mHideable;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets whether this bottom sheet should skip the collapsed state when it is being hidden
|
||||
* after it is expanded once. Setting this to true has no effect unless the sheet is hideable.
|
||||
*
|
||||
* @param skipCollapsed True if the bottom sheet should skip the collapsed state.
|
||||
* @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_skipCollapsed
|
||||
*/
|
||||
public void setSkipCollapsed(boolean skipCollapsed) {
|
||||
mSkipCollapsed = skipCollapsed;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets whether this bottom sheet should skip the collapsed state when it is being hidden
|
||||
* after it is expanded once.
|
||||
*
|
||||
* @return Whether the bottom sheet should skip the collapsed state.
|
||||
* @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_skipCollapsed
|
||||
*/
|
||||
public boolean getSkipCollapsed() {
|
||||
return mSkipCollapsed;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets a callback to be notified of bottom sheet events.
|
||||
*
|
||||
* @param callback The callback to notify when bottom sheet events occur.
|
||||
*/
|
||||
public void setBottomSheetCallback(BottomSheetCallback callback) {
|
||||
mCallback = callback;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the state of the bottom sheet. The bottom sheet will transition to that state with
|
||||
* animation.
|
||||
*
|
||||
* @param state One of {@link #STATE_COLLAPSED}, {@link #STATE_EXPANDED}, or
|
||||
* {@link #STATE_HIDDEN}.
|
||||
*/
|
||||
public final void setState(final @State int state) {
|
||||
if (state == mState) {
|
||||
return;
|
||||
}
|
||||
if (mViewRef == null) {
|
||||
// The view is not laid out yet; modify mState and let onLayoutChild handle it later
|
||||
if (state == STATE_COLLAPSED || state == STATE_EXPANDED ||
|
||||
(mHideable && state == STATE_HIDDEN)) {
|
||||
mState = state;
|
||||
}
|
||||
return;
|
||||
}
|
||||
final V child = mViewRef.get();
|
||||
if (child == null) {
|
||||
return;
|
||||
}
|
||||
// Start the animation; wait until a pending layout if there is one.
|
||||
ViewParent parent = child.getParent();
|
||||
if (parent != null && parent.isLayoutRequested() && ViewCompat.isAttachedToWindow(child)) {
|
||||
child.post(new Runnable() {
|
||||
@Override
|
||||
public void run() {
|
||||
startSettlingAnimation(child, state);
|
||||
}
|
||||
});
|
||||
} else {
|
||||
startSettlingAnimation(child, state);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets the current state of the bottom sheet.
|
||||
*
|
||||
* @return One of {@link #STATE_EXPANDED}, {@link #STATE_COLLAPSED}, {@link #STATE_DRAGGING},
|
||||
* and {@link #STATE_SETTLING}.
|
||||
*/
|
||||
@State
|
||||
public final int getState() {
|
||||
return mState;
|
||||
}
|
||||
|
||||
void setStateInternal(@State int state) {
|
||||
if (mState == state) {
|
||||
return;
|
||||
}
|
||||
mState = state;
|
||||
View bottomSheet = mViewRef.get();
|
||||
if (bottomSheet != null && mCallback != null) {
|
||||
mCallback.onStateChanged(bottomSheet, state);
|
||||
}
|
||||
}
|
||||
|
||||
private void reset() {
|
||||
mActivePointerId = ViewDragHelper.INVALID_POINTER;
|
||||
if (mVelocityTracker != null) {
|
||||
mVelocityTracker.recycle();
|
||||
mVelocityTracker = null;
|
||||
}
|
||||
}
|
||||
|
||||
boolean shouldHide(View child, float yvel) {
|
||||
if (mSkipCollapsed) {
|
||||
return true;
|
||||
}
|
||||
if (child.getTop() < mMaxOffset) {
|
||||
// It should not hide, but collapse.
|
||||
return false;
|
||||
}
|
||||
final float newTop = child.getTop() + yvel * HIDE_FRICTION;
|
||||
return Math.abs(newTop - mMaxOffset) / (float) mPeekHeight > HIDE_THRESHOLD;
|
||||
}
|
||||
|
||||
@VisibleForTesting
|
||||
View findScrollingChild(View view) {
|
||||
if (ViewCompat.isNestedScrollingEnabled(view)) {
|
||||
return view;
|
||||
}
|
||||
if (view instanceof ViewGroup) {
|
||||
ViewGroup group = (ViewGroup) view;
|
||||
for (int i = 0, count = group.getChildCount(); i < count; i++) {
|
||||
View scrollingChild = findScrollingChild(group.getChildAt(i));
|
||||
if (scrollingChild != null) {
|
||||
return scrollingChild;
|
||||
}
|
||||
}
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
private float getYVelocity() {
|
||||
mVelocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
|
||||
return mVelocityTracker.getYVelocity(mActivePointerId);
|
||||
}
|
||||
|
||||
void startSettlingAnimation(View child, int state) {
|
||||
int top;
|
||||
if (state == STATE_COLLAPSED) {
|
||||
top = mMaxOffset;
|
||||
} else if (state == STATE_EXPANDED) {
|
||||
top = mMinOffset;
|
||||
} else if (mHideable && state == STATE_HIDDEN) {
|
||||
top = mParentHeight;
|
||||
} else {
|
||||
throw new IllegalArgumentException("Illegal state argument: " + state);
|
||||
}
|
||||
if (mViewDragHelper.smoothSlideViewTo(child, child.getLeft(), top)) {
|
||||
setStateInternal(STATE_SETTLING);
|
||||
ViewCompat.postOnAnimation(child, new SettleRunnable(child, state));
|
||||
} else {
|
||||
setStateInternal(state);
|
||||
}
|
||||
}
|
||||
|
||||
private final ViewDragHelper.Callback mDragCallback = new ViewDragHelper.Callback() {
|
||||
|
||||
@Override
|
||||
public boolean tryCaptureView(View child, int pointerId) {
|
||||
if (mState == STATE_DRAGGING) {
|
||||
return false;
|
||||
}
|
||||
if (mTouchingScrollingChild) {
|
||||
return false;
|
||||
}
|
||||
if (mState == STATE_EXPANDED && mActivePointerId == pointerId) {
|
||||
View scroll = mNestedScrollingChildRef.get();
|
||||
if (scroll != null && scroll.canScrollVertically(-1)) {
|
||||
// Let the content scroll up
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return mViewRef != null && mViewRef.get() == child;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) {
|
||||
dispatchOnSlide(top);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onViewDragStateChanged(int state) {
|
||||
if (state == ViewDragHelper.STATE_DRAGGING) {
|
||||
setStateInternal(STATE_DRAGGING);
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onViewReleased(View releasedChild, float xvel, float yvel) {
|
||||
int top;
|
||||
@State int targetState;
|
||||
if (yvel < 0) { // Moving up
|
||||
top = mMinOffset;
|
||||
targetState = STATE_EXPANDED;
|
||||
} else if (mHideable && shouldHide(releasedChild, yvel)) {
|
||||
top = mParentHeight;
|
||||
targetState = STATE_HIDDEN;
|
||||
} else if (yvel == 0.f) {
|
||||
int currentTop = releasedChild.getTop();
|
||||
if (Math.abs(currentTop - mMinOffset) < Math.abs(currentTop - mMaxOffset)) {
|
||||
top = mMinOffset;
|
||||
targetState = STATE_EXPANDED;
|
||||
} else {
|
||||
top = mMaxOffset;
|
||||
targetState = STATE_COLLAPSED;
|
||||
}
|
||||
} else {
|
||||
top = mMaxOffset;
|
||||
targetState = STATE_COLLAPSED;
|
||||
}
|
||||
if (mViewDragHelper.settleCapturedViewAt(releasedChild.getLeft(), top)) {
|
||||
setStateInternal(STATE_SETTLING);
|
||||
ViewCompat.postOnAnimation(releasedChild,
|
||||
new SettleRunnable(releasedChild, targetState));
|
||||
} else {
|
||||
setStateInternal(targetState);
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public int clampViewPositionVertical(View child, int top, int dy) {
|
||||
return MathUtils.clamp(top, mMinOffset, mHideable ? mParentHeight : mMaxOffset);
|
||||
}
|
||||
|
||||
@Override
|
||||
public int clampViewPositionHorizontal(View child, int left, int dx) {
|
||||
return child.getLeft();
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getViewVerticalDragRange(View child) {
|
||||
if (mHideable) {
|
||||
return mParentHeight - mMinOffset;
|
||||
} else {
|
||||
return mMaxOffset - mMinOffset;
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
void dispatchOnSlide(int top) {
|
||||
View bottomSheet = mViewRef.get();
|
||||
if (bottomSheet != null && mCallback != null) {
|
||||
if (top > mMaxOffset) {
|
||||
mCallback.onSlide(bottomSheet, (float) (mMaxOffset - top) /
|
||||
(mParentHeight - mMaxOffset));
|
||||
} else {
|
||||
mCallback.onSlide(bottomSheet,
|
||||
(float) (mMaxOffset - top) / ((mMaxOffset - mMinOffset)));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@VisibleForTesting
|
||||
int getPeekHeightMin() {
|
||||
return mPeekHeightMin;
|
||||
}
|
||||
|
||||
private class SettleRunnable implements Runnable {
|
||||
|
||||
private final View mView;
|
||||
|
||||
@State
|
||||
private final int mTargetState;
|
||||
|
||||
SettleRunnable(View view, @State int targetState) {
|
||||
mView = view;
|
||||
mTargetState = targetState;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void run() {
|
||||
if (mViewDragHelper != null && mViewDragHelper.continueSettling(true)) {
|
||||
ViewCompat.postOnAnimation(mView, this);
|
||||
} else {
|
||||
setStateInternal(mTargetState);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
protected static class SavedState extends AbsSavedState {
|
||||
@State
|
||||
final int state;
|
||||
|
||||
public SavedState(Parcel source) {
|
||||
this(source, null);
|
||||
}
|
||||
|
||||
public SavedState(Parcel source, ClassLoader loader) {
|
||||
super(source, loader);
|
||||
//noinspection ResourceType
|
||||
state = source.readInt();
|
||||
}
|
||||
|
||||
public SavedState(Parcelable superState, @State int state) {
|
||||
super(superState);
|
||||
this.state = state;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void writeToParcel(Parcel out, int flags) {
|
||||
super.writeToParcel(out, flags);
|
||||
out.writeInt(state);
|
||||
}
|
||||
|
||||
public static final Creator<SavedState> CREATOR = new ClassLoaderCreator<SavedState>() {
|
||||
@Override
|
||||
public SavedState createFromParcel(Parcel in, ClassLoader loader) {
|
||||
return new SavedState(in, loader);
|
||||
}
|
||||
|
||||
@Override
|
||||
public SavedState createFromParcel(Parcel in) {
|
||||
return new SavedState(in, null);
|
||||
}
|
||||
|
||||
@Override
|
||||
public SavedState[] newArray(int size) {
|
||||
return new SavedState[size];
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* A utility function to get the {@link ExtendedBottomSheetBehavior} associated with the {@code view}.
|
||||
*
|
||||
* @param view The {@link View} with {@link ExtendedBottomSheetBehavior}.
|
||||
* @return The {@link ExtendedBottomSheetBehavior} associated with the {@code view}.
|
||||
*/
|
||||
@SuppressWarnings("unchecked")
|
||||
public static <V extends View> ExtendedBottomSheetBehavior<V> from(V view) {
|
||||
ViewGroup.LayoutParams params = view.getLayoutParams();
|
||||
if (!(params instanceof CoordinatorLayout.LayoutParams)) {
|
||||
throw new IllegalArgumentException("The view is not a child of CoordinatorLayout");
|
||||
}
|
||||
CoordinatorLayout.Behavior behavior = ((CoordinatorLayout.LayoutParams) params)
|
||||
.getBehavior();
|
||||
if (!(behavior instanceof ExtendedBottomSheetBehavior)) {
|
||||
throw new IllegalArgumentException(
|
||||
"The view is not associated with BottomSheetBehavior");
|
||||
}
|
||||
return (ExtendedBottomSheetBehavior<V>) behavior;
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in a new issue