BottomSheetBehavior.java revision 9aec720809a123c6193304730acf8b55d6ce5a7a
1452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki/* 2452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Copyright (C) 2015 The Android Open Source Project 3452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 4452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Licensed under the Apache License, Version 2.0 (the "License"); 5452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * you may not use this file except in compliance with the License. 6452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * You may obtain a copy of the License at 7452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 8452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * http://www.apache.org/licenses/LICENSE-2.0 9452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 10452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Unless required by applicable law or agreed to in writing, software 11452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * distributed under the License is distributed on an "AS IS" BASIS, 12452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * See the License for the specific language governing permissions and 14452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * limitations under the License. 15452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 16452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 17452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakipackage android.support.design.widget; 18452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 19452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.content.Context; 20452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.content.res.TypedArray; 21f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Arakiimport android.os.Build; 22452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.os.Parcel; 23452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.os.Parcelable; 24452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.annotation.IntDef; 25452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.design.R; 26452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.v4.view.MotionEventCompat; 279aec720809a123c6193304730acf8b55d6ce5a7aYuichi Arakiimport android.support.v4.view.NestedScrollingChild; 28452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.v4.view.ViewCompat; 29452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.v4.widget.ViewDragHelper; 30452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.util.AttributeSet; 31452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.view.MotionEvent; 32452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.view.View; 33452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.view.ViewGroup; 34f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Arakiimport android.view.ViewParent; 35452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 36452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport java.lang.annotation.Retention; 37452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport java.lang.annotation.RetentionPolicy; 38452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport java.lang.ref.WeakReference; 39452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 40452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 41452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki/** 42452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * An interaction behavior plugin for a child view of {@link CoordinatorLayout} to make it work as 43452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * a bottom sheet. 44452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 45452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakipublic class BottomSheetBehavior<V extends View> extends CoordinatorLayout.Behavior<V> { 46452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 47452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 484df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki * Callback for monitoring events about bottom sheets. 49f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 504df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki public abstract static class BottomSheetCallback { 51f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 52f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 53f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Called when the bottom sheet changes its state. 54f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 55f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @param newState The new state. This will be one of {@link #STATE_DRAGGING}, 56f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * {@link #STATE_SETTLING}, {@link #STATE_EXPANDED}, 57f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * {@link #STATE_COLLAPSED}, or {@link #STATE_HIDDEN}. 58f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 59f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public abstract void onStateChanged(@State int newState); 60f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 61f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 62f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Called when the bottom sheet is being dragged. 63f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 64f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @param slideOffset The new offset of this bottom sheet within its range, from 0 to 1 65f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * when it is moving upward, and from 0 to -1 when it moving downward. 66f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 67f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public abstract void onSlide(float slideOffset); 68f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 69f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 70f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 71452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is dragging. 72452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 73452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_DRAGGING = 1; 74452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 75452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 76452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is settling. 77452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 78452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_SETTLING = 2; 79452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 80452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 81452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is expanded. 82452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 83452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_EXPANDED = 3; 84452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 85452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 86452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is collapsed. 87452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 88452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_COLLAPSED = 4; 89452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 90f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 91f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * The bottom sheet is hidden. 92f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 93f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public static final int STATE_HIDDEN = 5; 94f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 95452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** @hide */ 96f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki @IntDef({STATE_EXPANDED, STATE_COLLAPSED, STATE_DRAGGING, STATE_SETTLING, STATE_HIDDEN}) 97452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Retention(RetentionPolicy.SOURCE) 98452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public @interface State {} 99452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 100f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private static final float HIDE_THRESHOLD = 0.5f; 101f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 102f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private static final float HIDE_FRICTION = 0.1f; 103f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 104f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki // Whether to enable workaround for black non-rendered square 105f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private static final boolean NEEDS_INVALIDATING = Build.VERSION.SDK_INT < 23; 106f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 107452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mPeekHeight; 108452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 109452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mMinOffset; 110452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 111452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mMaxOffset; 112452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 113f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private boolean mHideable; 114f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 115452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 116452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mState = STATE_COLLAPSED; 117452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 118452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private ViewDragHelper mViewDragHelper; 119452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 120452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private boolean mIgnoreEvents; 121452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 122452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mParentHeight; 123452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 124452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private WeakReference<V> mViewRef; 125452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 1269aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki private WeakReference<View> mNestedScrollingChildRef; 127f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 1289aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki private BottomSheetCallback mCallback; 129f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 1309aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki private int mScrollingChildPointerId = MotionEvent.INVALID_POINTER_ID; 131f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 132452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 133452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Default constructor for instantiating BottomSheetBehaviors. 134452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 135452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public BottomSheetBehavior() { 136452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 137452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 138452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 139452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Default constructor for inflating BottomSheetBehaviors from layout. 140452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 141452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param context The {@link Context}. 142452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param attrs The {@link AttributeSet}. 143452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 144452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public BottomSheetBehavior(Context context, AttributeSet attrs) { 145452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super(context, attrs); 146452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki TypedArray a = context.obtainStyledAttributes(attrs, 147452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki R.styleable.BottomSheetBehavior_Params); 148452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setPeekHeight(a.getDimensionPixelSize( 149452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki R.styleable.BottomSheetBehavior_Params_behavior_peekHeight, 0)); 150f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki setHideable(a.getBoolean(R.styleable.BottomSheetBehavior_Params_behavior_hideable, false)); 151452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki a.recycle(); 152452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 153452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 154452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 155452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public Parcelable onSaveInstanceState(CoordinatorLayout parent, V child) { 156452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return new SavedState(super.onSaveInstanceState(parent, child), mState); 157452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 158452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 159452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 160452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void onRestoreInstanceState(CoordinatorLayout parent, V child, Parcelable state) { 161452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki SavedState ss = (SavedState) state; 162452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super.onRestoreInstanceState(parent, child, ss.getSuperState()); 163452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // Intermediate states are restored as collapsed state 164f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (ss.state == STATE_DRAGGING || ss.state == STATE_SETTLING) { 165452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mState = STATE_COLLAPSED; 166f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { 167f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki mState = ss.state; 168452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 169452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 170452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 171452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 172452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) { 173452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // First let the parent lay it out 174f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (mState != STATE_DRAGGING && mState != STATE_SETTLING) { 175f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki parent.onLayoutChild(child, layoutDirection); 176f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 177452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // Offset the bottom sheet 178452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mParentHeight = parent.getHeight(); 179452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mMinOffset = Math.max(0, mParentHeight - child.getHeight()); 180452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mMaxOffset = mParentHeight - mPeekHeight; 181452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mState == STATE_EXPANDED) { 182452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.offsetTopAndBottom(child, mMinOffset); 183f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mHideable && mState == STATE_HIDDEN) { 184f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki ViewCompat.offsetTopAndBottom(child, mParentHeight); 185f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mState == STATE_COLLAPSED) { 186452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.offsetTopAndBottom(child, mMaxOffset); 187452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 188452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper == null) { 189452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mViewDragHelper = ViewDragHelper.create(parent, mDragCallback); 190452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 191452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mViewRef = new WeakReference<>(child); 1929aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child)); 193452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return true; 194452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 195452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 196452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 197452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean onInterceptTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) { 198452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki int action = MotionEventCompat.getActionMasked(event); 199452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki switch (action) { 200452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki case MotionEvent.ACTION_UP: 201452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki case MotionEvent.ACTION_CANCEL: 2029aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki mScrollingChildPointerId = MotionEvent.INVALID_POINTER_ID; 203452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // Reset the ignore flag 204452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mIgnoreEvents) { 205452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mIgnoreEvents = false; 206452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return false; 207452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 208452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki break; 209452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki case MotionEvent.ACTION_DOWN: 2109aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki int x = (int) event.getX(); 2119aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki int y = (int) event.getY(); 2129aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki View scroll = mNestedScrollingChildRef.get(); 2139aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (scroll != null && parent.isPointInChildBounds(scroll, x, y)) { 2149aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki mScrollingChildPointerId = event.getPointerId(event.getActionIndex()); 2159aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } else { 2169aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki mScrollingChildPointerId = MotionEvent.INVALID_POINTER_ID; 2179aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 2189aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki mIgnoreEvents = mScrollingChildPointerId == MotionEvent.INVALID_POINTER_ID && 2199aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki !parent.isPointInChildBounds(child, x, y); 220452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki break; 221452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 222452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return !mIgnoreEvents && mViewDragHelper.shouldInterceptTouchEvent(event); 223452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 224452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 225452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 226452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean onTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) { 227452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mViewDragHelper.processTouchEvent(event); 228452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return true; 229452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 230452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 231452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 232452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Sets the height of the bottom sheet when it is collapsed. 233452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 234452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param peekHeight The height of the collapsed bottom sheet in pixels. 235452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Params_behavior_peekHeight 236452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 237452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final void setPeekHeight(int peekHeight) { 238452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mPeekHeight = Math.max(0, peekHeight); 239452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mMaxOffset = mParentHeight - peekHeight; 240452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 241452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 242452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 243452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Gets the height of the bottom sheet when it is collapsed. 244452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 245452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @return The height of the collapsed bottom sheet. 246452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Params_behavior_peekHeight 247452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 248452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final int getPeekHeight() { 249452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return mPeekHeight; 250452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 251452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 252452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 253f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Sets whether this bottom sheet can hide when it is swiped down. 254f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 255f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @param hideable {@code true} to make this bottom sheet hideable. 256f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Params_behavior_hideable 257f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 258f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public void setHideable(boolean hideable) { 259f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki mHideable = hideable; 260f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 261f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 262f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 263f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Gets whether this bottom sheet can hide when it is swiped down. 264f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 265f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @return {@code true} if this bottom sheet can hide. 266f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Params_behavior_hideable 267f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 268f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public boolean isHideable() { 269f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return mHideable; 270f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 271f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 272f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 2734df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki * Sets a callback to be notified of bottom sheet events. 274f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 2754df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki * @param callback The callback to notify when bottom sheet events occur. 276f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 2774df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki public void setBottomSheetCallback(BottomSheetCallback callback) { 2784df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki mCallback = callback; 279f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 280f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 281f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 282452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Sets the state of the bottom sheet. The bottom sheet will transition to that state with 283452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * animation. 284452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 285f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @param state One of {@link #STATE_COLLAPSED}, {@link #STATE_EXPANDED}, or 286f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * {@link #STATE_HIDDEN}. 287452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 288452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final void setState(@State int state) { 289452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki V child = mViewRef.get(); 290452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (child == null) { 291452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return; 292452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 293452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki int top; 294452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (state == STATE_COLLAPSED) { 295452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMaxOffset; 296452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else if (state == STATE_EXPANDED) { 297452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMinOffset; 298f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mHideable && state == STATE_HIDDEN) { 299f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki top = mParentHeight; 300452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else { 301452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki throw new IllegalArgumentException("Illegal state argument: " + state); 302452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 303452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setStateInternal(STATE_SETTLING); 304452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper.smoothSlideViewTo(child, child.getLeft(), top)) { 305452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.postOnAnimation(child, new SettleRunnable(child, state)); 306452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 307452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 308452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 309452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 310452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Gets the current state of the bottom sheet. 311452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 312452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @return One of {@link #STATE_EXPANDED}, {@link #STATE_COLLAPSED}, {@link #STATE_DRAGGING}, 313452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * and {@link #STATE_SETTLING}. 314452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 315452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 316452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final int getState() { 317452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return mState; 318452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 319452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 320452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private void setStateInternal(@State int state) { 321452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mState == state) { 322452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return; 323452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 324452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mState = state; 3254df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki if (mCallback != null) { 3264df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki mCallback.onStateChanged(state); 327f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 328f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 329f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 330f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private boolean shouldHide(View child, float yvel) { 331f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (child.getTop() < mMaxOffset) { 332f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki // It should not hide, but collapse. 333f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return false; 334f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 335f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki final float newTop = child.getTop() + yvel * HIDE_FRICTION; 336f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return Math.abs(newTop - mMaxOffset) / (float) mPeekHeight > HIDE_THRESHOLD; 337f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 338f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 3399aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki private View findScrollingChild(View view) { 3409aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (view instanceof NestedScrollingChild) { 3419aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return view; 3429aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 3439aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (view instanceof ViewGroup) { 3449aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki ViewGroup group = (ViewGroup) view; 3459aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki for (int i = 0, count = group.getChildCount(); i < count; i++) { 3469aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki View scrollingChild = findScrollingChild(group.getChildAt(i)); 3479aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (scrollingChild != null) { 3489aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return scrollingChild; 3499aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 3509aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 3519aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 3529aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return null; 353452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 354452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 355452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private final ViewDragHelper.Callback mDragCallback = new ViewDragHelper.Callback() { 356452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 357452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 358452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean tryCaptureView(View child, int pointerId) { 3599aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (mState == STATE_EXPANDED && mScrollingChildPointerId == pointerId) { 3609aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki View scroll = mNestedScrollingChildRef.get(); 3619aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (scroll != null && ViewCompat.canScrollVertically(scroll, -1)) { 3629aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki // Let the content scroll up 3639aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return false; 3649aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 3659aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 366f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return mViewRef != null && mViewRef.get() == child; 367f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 368f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 369f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki @Override 370f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) { 371f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki dispatchOnSlide(top); 372f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (NEEDS_INVALIDATING) { 373f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (dy < 0) { // Upward 374f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki changedView.invalidate(); 375f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { // Downward 376f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki ViewParent parent = changedView.getParent(); 377f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (parent instanceof View) { 378f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki View v = (View) parent; 379f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki v.invalidate(changedView.getLeft(), top - dy, 380f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki changedView.getRight(), v.getHeight()); 381f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 382f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 383f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 384452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 385452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 386452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 387452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void onViewDragStateChanged(int state) { 388452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (state == ViewDragHelper.STATE_DRAGGING) { 389452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setStateInternal(STATE_DRAGGING); 390452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 391452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 392452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 393452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 394452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void onViewReleased(View releasedChild, float xvel, float yvel) { 395452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki int top; 396452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State int targetState; 397f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (yvel < 0) { // Moving up 398452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMinOffset; 399452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki targetState = STATE_EXPANDED; 400f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mHideable && shouldHide(releasedChild, yvel)) { 401f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki top = mParentHeight; 402f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki targetState = STATE_HIDDEN; 403452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else { 404452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMaxOffset; 405452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki targetState = STATE_COLLAPSED; 406452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 407452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper.settleCapturedViewAt(releasedChild.getLeft(), top)) { 408f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki setStateInternal(STATE_SETTLING); 409452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.postOnAnimation(releasedChild, 410452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki new SettleRunnable(releasedChild, targetState)); 411f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { 412f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki setStateInternal(targetState); 413452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 414452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 415452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 416452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 417452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public int clampViewPositionVertical(View child, int top, int dy) { 418f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return MathUtils.constrain(top, mMinOffset, mHideable ? mParentHeight : mMaxOffset); 419452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 420452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 421452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 422452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public int clampViewPositionHorizontal(View child, int left, int dx) { 423452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return child.getLeft(); 424452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 425f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 4269aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki @Override 4279aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki public int getViewVerticalDragRange(View child) { 4289aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (mHideable) { 4299aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return mParentHeight - mMinOffset; 4309aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } else { 4319aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return mMaxOffset - mMinOffset; 4329aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 4339aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 434452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki }; 435452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 436f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private void dispatchOnSlide(int top) { 4374df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki if (mCallback != null) { 438f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (top > mMaxOffset) { 4394df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki mCallback.onSlide((float) (mMaxOffset - top) / mPeekHeight); 440f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { 4414df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki mCallback.onSlide((float) (mMaxOffset - top) / ((mMaxOffset - mMinOffset))); 442f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 443f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 444f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 445f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 446452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private class SettleRunnable implements Runnable { 447452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 448452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private final View mView; 449452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 450452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 451452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private final int mTargetState; 452452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 453452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki SettleRunnable(View view, @State int targetState) { 454452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mView = view; 455452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mTargetState = targetState; 456f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (NEEDS_INVALIDATING) { 457f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki // We need to invalidate the parent here, or the following animation won't be drawn. 458f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki ViewParent parent = mView.getParent(); 459f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (parent instanceof View) { 460f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki ((View) parent).invalidate(); 461f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 462f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 463452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 464452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 465452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 466452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void run() { 467452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper != null && mViewDragHelper.continueSettling(true)) { 468452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.postOnAnimation(mView, this); 469452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else { 470452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setStateInternal(mTargetState); 471452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 472452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 473452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 474452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 475452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki protected static class SavedState extends View.BaseSavedState { 476452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 477452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 478452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki final int state; 479452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 480452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState(Parcel source) { 481452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super(source); 482452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki //noinspection ResourceType 483452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki state = source.readInt(); 484452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 485452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 486452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState(Parcelable superState, @State int state) { 487452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super(superState); 488452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki this.state = state; 489452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 490452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 491452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 492452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void writeToParcel(Parcel out, int flags) { 493452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super.writeToParcel(out, flags); 494452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki out.writeInt(state); 495452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 496452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 497452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final Parcelable.Creator<SavedState> CREATOR = 498452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki new Parcelable.Creator<SavedState>() { 499452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 500452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState createFromParcel(Parcel source) { 501452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return new SavedState(source); 502452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 503452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 504452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 505452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState[] newArray(int size) { 506452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return new SavedState[size]; 507452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 508452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki }; 509452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 510452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 511f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 512452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * A utility function to get the {@link BottomSheetBehavior} associated with the {@code view}. 513452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 514452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param view The {@link View} with {@link BottomSheetBehavior}. 515452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @return The {@link BottomSheetBehavior} associated with the {@code view}. 516452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 517452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @SuppressWarnings("unchecked") 518452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static <V extends View> BottomSheetBehavior<V> from(V view) { 519452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewGroup.LayoutParams params = view.getLayoutParams(); 520452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (!(params instanceof CoordinatorLayout.LayoutParams)) { 521452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki throw new IllegalArgumentException("The view is not a child of CoordinatorLayout"); 522452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 523452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki CoordinatorLayout.Behavior behavior = ((CoordinatorLayout.LayoutParams) params) 524452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki .getBehavior(); 525452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (!(behavior instanceof BottomSheetBehavior)) { 526452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki throw new IllegalArgumentException( 527452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki "The view is not associated with BottomSheetBehavior"); 528452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 529452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return (BottomSheetBehavior<V>) behavior; 530452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 531452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 532452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki} 533