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 198e10080c914d1ad0784394fa3026b85535535847Aurimas Liutikasimport static android.support.annotation.RestrictTo.Scope.LIBRARY_GROUP; 208e10080c914d1ad0784394fa3026b85535535847Aurimas Liutikas 21452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.content.Context; 22452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.content.res.TypedArray; 23452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.os.Parcel; 24452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.os.Parcelable; 25452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.annotation.IntDef; 26dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Arakiimport android.support.annotation.NonNull; 27c39d9c75590eca86a5e7e32a8824ba04a0d42e9bAlan Viveretteimport android.support.annotation.RestrictTo; 28a7a51521e1ecd8a009e4bd618520af05d9917671Yuichi Arakiimport android.support.annotation.VisibleForTesting; 29452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.design.R; 3012e0a308d1ab838cb05c395baa6f1251fcbb2363Aurimas Liutikasimport android.support.v4.math.MathUtils; 3105f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banesimport android.support.v4.view.AbsSavedState; 32452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.v4.view.ViewCompat; 33452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.v4.widget.ViewDragHelper; 34452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.util.AttributeSet; 3501ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Arakiimport android.util.TypedValue; 36452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.view.MotionEvent; 37e3e7063749d095bba8743cad0aeb7164a567890dYuichi Arakiimport android.view.VelocityTracker; 38452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.view.View; 39e3e7063749d095bba8743cad0aeb7164a567890dYuichi Arakiimport android.view.ViewConfiguration; 40452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.view.ViewGroup; 41bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Arakiimport android.view.ViewParent; 42452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 43452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport java.lang.annotation.Retention; 44452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport java.lang.annotation.RetentionPolicy; 45452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport java.lang.ref.WeakReference; 46452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 47452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 48452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki/** 49452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * An interaction behavior plugin for a child view of {@link CoordinatorLayout} to make it work as 50452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * a bottom sheet. 51452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 52452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakipublic class BottomSheetBehavior<V extends View> extends CoordinatorLayout.Behavior<V> { 53452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 54452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 554df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki * Callback for monitoring events about bottom sheets. 56f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 574df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki public abstract static class BottomSheetCallback { 58f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 59f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 60f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Called when the bottom sheet changes its state. 61f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 62dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * @param bottomSheet The bottom sheet view. 63dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * @param newState The new state. This will be one of {@link #STATE_DRAGGING}, 64dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * {@link #STATE_SETTLING}, {@link #STATE_EXPANDED}, 65dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * {@link #STATE_COLLAPSED}, or {@link #STATE_HIDDEN}. 66f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 67dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki public abstract void onStateChanged(@NonNull View bottomSheet, @State int newState); 68f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 69f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 70f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Called when the bottom sheet is being dragged. 71f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 72dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * @param bottomSheet The bottom sheet view. 7391177092bb7b2a0586f194de4d207349cdfabf30Aurimas Liutikas * @param slideOffset The new offset of this bottom sheet within [-1,1] range. Offset 7491177092bb7b2a0586f194de4d207349cdfabf30Aurimas Liutikas * increases as this bottom sheet is moving upward. From 0 to 1 the sheet 7591177092bb7b2a0586f194de4d207349cdfabf30Aurimas Liutikas * is between collapsed and expanded states and from -1 to 0 it is 7691177092bb7b2a0586f194de4d207349cdfabf30Aurimas Liutikas * between hidden and collapsed states. 77f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 78dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki public abstract void onSlide(@NonNull View bottomSheet, float slideOffset); 79f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 80f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 81f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 82452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is dragging. 83452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 84452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_DRAGGING = 1; 85452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 86452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 87452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is settling. 88452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 89452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_SETTLING = 2; 90452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 91452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 92452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is expanded. 93452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 94452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_EXPANDED = 3; 95452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 96452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 97452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is collapsed. 98452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 99452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_COLLAPSED = 4; 100452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 101f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 102f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * The bottom sheet is hidden. 103f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 104f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public static final int STATE_HIDDEN = 5; 105f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 106452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** @hide */ 1078e10080c914d1ad0784394fa3026b85535535847Aurimas Liutikas @RestrictTo(LIBRARY_GROUP) 108f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki @IntDef({STATE_EXPANDED, STATE_COLLAPSED, STATE_DRAGGING, STATE_SETTLING, STATE_HIDDEN}) 109452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Retention(RetentionPolicy.SOURCE) 110452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public @interface State {} 111452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 11201ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki /** 11301ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki * Peek at the 16:9 ratio keyline of its parent. 114645afdf27340a6620c9970d14923b556e3c66574Yuichi Araki * 115645afdf27340a6620c9970d14923b556e3c66574Yuichi Araki * <p>This can be used as a parameter for {@link #setPeekHeight(int)}. 116645afdf27340a6620c9970d14923b556e3c66574Yuichi Araki * {@link #getPeekHeight()} will return this when the value is set.</p> 11701ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki */ 11801ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki public static final int PEEK_HEIGHT_AUTO = -1; 11901ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki 120f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private static final float HIDE_THRESHOLD = 0.5f; 121f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 122f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private static final float HIDE_FRICTION = 0.1f; 123f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 124e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private float mMaximumVelocity; 125f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 126452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mPeekHeight; 127452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 12801ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki private boolean mPeekHeightAuto; 12901ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki 13001ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki private int mPeekHeightMin; 13101ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki 132657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas int mMinOffset; 133452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 134657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas int mMaxOffset; 135452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 136657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas boolean mHideable; 137f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 138362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki private boolean mSkipCollapsed; 139362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki 140452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 141657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas int mState = STATE_COLLAPSED; 142452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 143657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas ViewDragHelper mViewDragHelper; 144452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 145452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private boolean mIgnoreEvents; 146452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 147e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private int mLastNestedScrollDy; 148e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 14949a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki private boolean mNestedScrolled; 15049a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki 151657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas int mParentHeight; 152452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 153657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas WeakReference<V> mViewRef; 154452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 155657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas WeakReference<View> mNestedScrollingChildRef; 156f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 1579aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki private BottomSheetCallback mCallback; 158f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 159e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private VelocityTracker mVelocityTracker; 160e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 161657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas int mActivePointerId; 162f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 1634eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki private int mInitialY; 1644eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki 165657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas boolean mTouchingScrollingChild; 166b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki 167452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 168452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Default constructor for instantiating BottomSheetBehaviors. 169452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 170452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public BottomSheetBehavior() { 171452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 172452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 173452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 174452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Default constructor for inflating BottomSheetBehaviors from layout. 175452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 176452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param context The {@link Context}. 177452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param attrs The {@link AttributeSet}. 178452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 179452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public BottomSheetBehavior(Context context, AttributeSet attrs) { 180452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super(context, attrs); 181452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki TypedArray a = context.obtainStyledAttributes(attrs, 182c6cbbb50a06ec08e6888bd1c3dfd7fdf588d9db5Chris Banes R.styleable.BottomSheetBehavior_Layout); 18301ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki TypedValue value = a.peekValue(R.styleable.BottomSheetBehavior_Layout_behavior_peekHeight); 184606579592e9e9303a89cae2cf9bfe9f21572eec3Yuichi Araki if (value != null && value.data == PEEK_HEIGHT_AUTO) { 18501ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki setPeekHeight(value.data); 18601ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } else { 18701ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki setPeekHeight(a.getDimensionPixelSize( 18801ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki R.styleable.BottomSheetBehavior_Layout_behavior_peekHeight, PEEK_HEIGHT_AUTO)); 18901ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } 190c6cbbb50a06ec08e6888bd1c3dfd7fdf588d9db5Chris Banes setHideable(a.getBoolean(R.styleable.BottomSheetBehavior_Layout_behavior_hideable, false)); 191362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki setSkipCollapsed(a.getBoolean(R.styleable.BottomSheetBehavior_Layout_behavior_skipCollapsed, 192362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki false)); 193452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki a.recycle(); 194e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewConfiguration configuration = ViewConfiguration.get(context); 195e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); 196452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 197452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 198452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 199452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public Parcelable onSaveInstanceState(CoordinatorLayout parent, V child) { 200452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return new SavedState(super.onSaveInstanceState(parent, child), mState); 201452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 202452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 203452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 204452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void onRestoreInstanceState(CoordinatorLayout parent, V child, Parcelable state) { 205452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki SavedState ss = (SavedState) state; 206452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super.onRestoreInstanceState(parent, child, ss.getSuperState()); 207452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // Intermediate states are restored as collapsed state 208f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (ss.state == STATE_DRAGGING || ss.state == STATE_SETTLING) { 209452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mState = STATE_COLLAPSED; 210f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { 211f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki mState = ss.state; 212452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 213452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 214452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 215452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 216452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) { 2176bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) { 2186bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki ViewCompat.setFitsSystemWindows(child, true); 219f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 2206bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki int savedTop = child.getTop(); 2216bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki // First let the parent lay it out 2226bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki parent.onLayoutChild(child, layoutDirection); 223452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // Offset the bottom sheet 224452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mParentHeight = parent.getHeight(); 22501ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki int peekHeight; 22601ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki if (mPeekHeightAuto) { 22701ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki if (mPeekHeightMin == 0) { 22801ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki mPeekHeightMin = parent.getResources().getDimensionPixelSize( 22901ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki R.dimen.design_bottom_sheet_peek_height_min); 23001ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } 23101ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki peekHeight = Math.max(mPeekHeightMin, mParentHeight - parent.getWidth() * 9 / 16); 23201ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } else { 23301ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki peekHeight = mPeekHeight; 23401ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } 235452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mMinOffset = Math.max(0, mParentHeight - child.getHeight()); 23601ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki mMaxOffset = Math.max(mParentHeight - peekHeight, mMinOffset); 237452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mState == STATE_EXPANDED) { 238452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.offsetTopAndBottom(child, mMinOffset); 239f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mHideable && mState == STATE_HIDDEN) { 240f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki ViewCompat.offsetTopAndBottom(child, mParentHeight); 241f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mState == STATE_COLLAPSED) { 242452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.offsetTopAndBottom(child, mMaxOffset); 2436bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki } else if (mState == STATE_DRAGGING || mState == STATE_SETTLING) { 2446bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop()); 245452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 246452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper == null) { 247452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mViewDragHelper = ViewDragHelper.create(parent, mDragCallback); 248452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 249452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mViewRef = new WeakReference<>(child); 2509aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child)); 251452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return true; 252452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 253452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 254452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 255452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean onInterceptTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) { 25617fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki if (!child.isShown()) { 2576cb44089e8c7a5abf8aa7a0cdff3cb6888790708Yuichi Araki mIgnoreEvents = true; 25817fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki return false; 25917fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki } 2606ed40c1f86bcb172a1f0f069cde1c571a7781aeeAurimas Liutikas int action = event.getActionMasked(); 261e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki // Record the velocity 262e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (action == MotionEvent.ACTION_DOWN) { 263e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki reset(); 264e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 265e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mVelocityTracker == null) { 266e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker = VelocityTracker.obtain(); 267e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 268e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.addMovement(event); 269452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki switch (action) { 270452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki case MotionEvent.ACTION_UP: 271452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki case MotionEvent.ACTION_CANCEL: 272b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki mTouchingScrollingChild = false; 273e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mActivePointerId = MotionEvent.INVALID_POINTER_ID; 274452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // Reset the ignore flag 275452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mIgnoreEvents) { 276452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mIgnoreEvents = false; 277452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return false; 278452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 279452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki break; 280452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki case MotionEvent.ACTION_DOWN: 2814eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki int initialX = (int) event.getX(); 2824eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki mInitialY = (int) event.getY(); 283eb0922a6531ce1debff929814fff4b3df4159a45Geoffrey Métais View scroll = mNestedScrollingChildRef != null 284eb0922a6531ce1debff929814fff4b3df4159a45Geoffrey Métais ? mNestedScrollingChildRef.get() : null; 2854eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki if (scroll != null && parent.isPointInChildBounds(scroll, initialX, mInitialY)) { 286e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mActivePointerId = event.getPointerId(event.getActionIndex()); 287b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki mTouchingScrollingChild = true; 2889aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 289e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mIgnoreEvents = mActivePointerId == MotionEvent.INVALID_POINTER_ID && 2904eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki !parent.isPointInChildBounds(child, initialX, mInitialY); 291452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki break; 292452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 2934eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki if (!mIgnoreEvents && mViewDragHelper.shouldInterceptTouchEvent(event)) { 2944eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki return true; 2954eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki } 2964eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // We have to handle cases that the ViewDragHelper does not capture the bottom sheet because 2974eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // it is not the top most view of its parent. This is not necessary when the touch event is 2984eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // happening over the scrolling content as nested scrolling logic handles that case. 2994eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki View scroll = mNestedScrollingChildRef.get(); 3004eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki return action == MotionEvent.ACTION_MOVE && scroll != null && 3014eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki !mIgnoreEvents && mState != STATE_DRAGGING && 3024eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki !parent.isPointInChildBounds(scroll, (int) event.getX(), (int) event.getY()) && 3034eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki Math.abs(mInitialY - event.getY()) > mViewDragHelper.getTouchSlop(); 304452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 305452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 306452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 307452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean onTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) { 30817fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki if (!child.isShown()) { 30917fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki return false; 31017fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki } 3116ed40c1f86bcb172a1f0f069cde1c571a7781aeeAurimas Liutikas int action = event.getActionMasked(); 312e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mState == STATE_DRAGGING && action == MotionEvent.ACTION_DOWN) { 313e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return true; 314e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 315452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mViewDragHelper.processTouchEvent(event); 316e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki // Record the velocity 317e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (action == MotionEvent.ACTION_DOWN) { 318e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki reset(); 319e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 320e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mVelocityTracker == null) { 321e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker = VelocityTracker.obtain(); 322e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 323e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.addMovement(event); 3244eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // The ViewDragHelper tries to capture only the top-most View. We have to explicitly tell it 3254eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // to capture the bottom sheet in case it is not captured and the touch slop is passed. 326912d40d353f5b6d0a4fa18740ca40aa4b25b0f9cYuichi Araki if (action == MotionEvent.ACTION_MOVE && !mIgnoreEvents) { 3274eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki if (Math.abs(mInitialY - event.getY()) > mViewDragHelper.getTouchSlop()) { 3284eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki mViewDragHelper.captureChildView(child, event.getPointerId(event.getActionIndex())); 3294eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki } 3304eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki } 3311dbdc6baec537b45e9bd8e5afabcb5c35f1a8004Yuichi Araki return !mIgnoreEvents; 332452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 333452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 334e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 335e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, V child, 336e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki View directTargetChild, View target, int nestedScrollAxes) { 337e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mLastNestedScrollDy = 0; 33849a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki mNestedScrolled = false; 339e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return (nestedScrollAxes & ViewCompat.SCROLL_AXIS_VERTICAL) != 0; 340e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 341e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 342e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 343e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dx, 344e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int dy, int[] consumed) { 345e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki View scrollingChild = mNestedScrollingChildRef.get(); 346e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (target != scrollingChild) { 347e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return; 348e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 349e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int currentTop = child.getTop(); 350e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int newTop = currentTop - dy; 351e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (dy > 0) { // Upward 352e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (newTop < mMinOffset) { 353e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = currentTop - mMinOffset; 354e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -consumed[1]); 355e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_EXPANDED); 356e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 357e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = dy; 358e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -dy); 359e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_DRAGGING); 360e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 361e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else if (dy < 0) { // Downward 362e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (!ViewCompat.canScrollVertically(target, -1)) { 363e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (newTop <= mMaxOffset || mHideable) { 364e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = dy; 365e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -dy); 366e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_DRAGGING); 367e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 368e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = currentTop - mMaxOffset; 369e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -consumed[1]); 370e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_COLLAPSED); 371e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 372e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 373e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 374e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki dispatchOnSlide(child.getTop()); 375e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mLastNestedScrollDy = dy; 37649a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki mNestedScrolled = true; 377e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 378e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 379e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 380e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public void onStopNestedScroll(CoordinatorLayout coordinatorLayout, V child, View target) { 381b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki if (child.getTop() == mMinOffset) { 382b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki setStateInternal(STATE_EXPANDED); 383b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki return; 384b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki } 385d1e6ea34363dbb189490bb793692c86c2ebecf47Geoffrey Métais if (mNestedScrollingChildRef == null || target != mNestedScrollingChildRef.get() 386d1e6ea34363dbb189490bb793692c86c2ebecf47Geoffrey Métais || !mNestedScrolled) { 387e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return; 388e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 389e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int top; 390e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int targetState; 391e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mLastNestedScrollDy > 0) { 392e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki top = mMinOffset; 393e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki targetState = STATE_EXPANDED; 394e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else if (mHideable && shouldHide(child, getYVelocity())) { 395e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki top = mParentHeight; 396e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki targetState = STATE_HIDDEN; 39749a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else if (mLastNestedScrollDy == 0) { 39849a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki int currentTop = child.getTop(); 39949a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki if (Math.abs(currentTop - mMinOffset) < Math.abs(currentTop - mMaxOffset)) { 40049a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMinOffset; 40149a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_EXPANDED; 40249a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else { 40349a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMaxOffset; 40449a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_COLLAPSED; 40549a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } 406e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 407e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki top = mMaxOffset; 408e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki targetState = STATE_COLLAPSED; 409e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 410e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mViewDragHelper.smoothSlideViewTo(child, child.getLeft(), top)) { 411e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_SETTLING); 412e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.postOnAnimation(child, new SettleRunnable(child, targetState)); 413e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 414e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(targetState); 415e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 41649a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki mNestedScrolled = false; 417e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 418e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 419e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 420e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public boolean onNestedPreFling(CoordinatorLayout coordinatorLayout, V child, View target, 421e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki float velocityX, float velocityY) { 422e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return target == mNestedScrollingChildRef.get() && 423e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki (mState != STATE_EXPANDED || 424e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki super.onNestedPreFling(coordinatorLayout, child, target, 425e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki velocityX, velocityY)); 426e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 427e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 428452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 429452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Sets the height of the bottom sheet when it is collapsed. 430452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 43101ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki * @param peekHeight The height of the collapsed bottom sheet in pixels, or 432a36fbe5e02568bfae82904e7c7ac39438bde4551Yuichi Araki * {@link #PEEK_HEIGHT_AUTO} to configure the sheet to peek automatically 433a36fbe5e02568bfae82904e7c7ac39438bde4551Yuichi Araki * at 16:9 ratio keyline. 43473e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_peekHeight 435452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 436452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final void setPeekHeight(int peekHeight) { 43701ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki boolean layout = false; 43801ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki if (peekHeight == PEEK_HEIGHT_AUTO) { 43901ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki if (!mPeekHeightAuto) { 44001ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki mPeekHeightAuto = true; 44101ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki layout = true; 44201ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } 44301ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } else if (mPeekHeightAuto || mPeekHeight != peekHeight) { 44401ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki mPeekHeightAuto = false; 44501ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki mPeekHeight = Math.max(0, peekHeight); 44601ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki mMaxOffset = mParentHeight - peekHeight; 44701ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki layout = true; 44801ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } 44901ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki if (layout && mState == STATE_COLLAPSED && mViewRef != null) { 45001ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki V view = mViewRef.get(); 45101ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki if (view != null) { 45201ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki view.requestLayout(); 45301ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } 45401ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } 455452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 456452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 457452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 458452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Gets the height of the bottom sheet when it is collapsed. 459452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 460a36fbe5e02568bfae82904e7c7ac39438bde4551Yuichi Araki * @return The height of the collapsed bottom sheet in pixels, or {@link #PEEK_HEIGHT_AUTO} 461a36fbe5e02568bfae82904e7c7ac39438bde4551Yuichi Araki * if the sheet is configured to peek automatically at 16:9 ratio keyline 46273e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_peekHeight 463452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 464452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final int getPeekHeight() { 465a36fbe5e02568bfae82904e7c7ac39438bde4551Yuichi Araki return mPeekHeightAuto ? PEEK_HEIGHT_AUTO : mPeekHeight; 466452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 467452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 468452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 469f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Sets whether this bottom sheet can hide when it is swiped down. 470f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 471f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @param hideable {@code true} to make this bottom sheet hideable. 47273e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_hideable 473f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 474f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public void setHideable(boolean hideable) { 475f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki mHideable = hideable; 476f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 477f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 478f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 479f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Gets whether this bottom sheet can hide when it is swiped down. 480f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 481f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @return {@code true} if this bottom sheet can hide. 48273e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_hideable 483f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 484f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public boolean isHideable() { 485f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return mHideable; 486f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 487f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 488f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 489362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * Sets whether this bottom sheet should skip the collapsed state when it is being hidden 490362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * after it is expanded once. Setting this to true has no effect unless the sheet is hideable. 491362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * 492362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * @param skipCollapsed True if the bottom sheet should skip the collapsed state. 493362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_skipCollapsed 494362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki */ 495362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki public void setSkipCollapsed(boolean skipCollapsed) { 496362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki mSkipCollapsed = skipCollapsed; 497362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki } 498362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki 499362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki /** 500362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * Sets whether this bottom sheet should skip the collapsed state when it is being hidden 501362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * after it is expanded once. 502362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * 503362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * @return Whether the bottom sheet should skip the collapsed state. 504362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_skipCollapsed 505362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki */ 506362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki public boolean getSkipCollapsed() { 507362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki return mSkipCollapsed; 508362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki } 509362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki 510362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki /** 5114df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki * Sets a callback to be notified of bottom sheet events. 512f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 5134df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki * @param callback The callback to notify when bottom sheet events occur. 514f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 5154df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki public void setBottomSheetCallback(BottomSheetCallback callback) { 5164df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki mCallback = callback; 517f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 518f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 519f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 520452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Sets the state of the bottom sheet. The bottom sheet will transition to that state with 521452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * animation. 522452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 523f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @param state One of {@link #STATE_COLLAPSED}, {@link #STATE_EXPANDED}, or 524f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * {@link #STATE_HIDDEN}. 525452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 526bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki public final void setState(final @State int state) { 527e0573dfb5896eb66e266ea366d8c58437c739c95Yuichi Araki if (state == mState) { 528e0573dfb5896eb66e266ea366d8c58437c739c95Yuichi Araki return; 529e0573dfb5896eb66e266ea366d8c58437c739c95Yuichi Araki } 53098475d29e771d7b15e4a109b22f410c7c1cf33d7Taeho Kim if (mViewRef == null) { 5316deb3a9dc52be7ab61702c430bb327343ef099acYuichi Araki // The view is not laid out yet; modify mState and let onLayoutChild handle it later 5326deb3a9dc52be7ab61702c430bb327343ef099acYuichi Araki if (state == STATE_COLLAPSED || state == STATE_EXPANDED || 5336deb3a9dc52be7ab61702c430bb327343ef099acYuichi Araki (mHideable && state == STATE_HIDDEN)) { 5346deb3a9dc52be7ab61702c430bb327343ef099acYuichi Araki mState = state; 5356deb3a9dc52be7ab61702c430bb327343ef099acYuichi Araki } 53698475d29e771d7b15e4a109b22f410c7c1cf33d7Taeho Kim return; 53798475d29e771d7b15e4a109b22f410c7c1cf33d7Taeho Kim } 538bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki final V child = mViewRef.get(); 539452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (child == null) { 540452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return; 541452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 542bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki // Start the animation; wait until a pending layout if there is one. 543bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki ViewParent parent = child.getParent(); 544bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki if (parent != null && parent.isLayoutRequested() && ViewCompat.isAttachedToWindow(child)) { 545bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki child.post(new Runnable() { 546bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki @Override 547bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki public void run() { 548bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki startSettlingAnimation(child, state); 549bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki } 550bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki }); 551452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else { 552bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki startSettlingAnimation(child, state); 553452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 554452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 555452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 556452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 557452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Gets the current state of the bottom sheet. 558452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 559452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @return One of {@link #STATE_EXPANDED}, {@link #STATE_COLLAPSED}, {@link #STATE_DRAGGING}, 560452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * and {@link #STATE_SETTLING}. 561452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 562452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 563452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final int getState() { 564452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return mState; 565452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 566452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 567657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas void setStateInternal(@State int state) { 568452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mState == state) { 569452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return; 570452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 571452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mState = state; 572dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki View bottomSheet = mViewRef.get(); 573dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki if (bottomSheet != null && mCallback != null) { 574dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki mCallback.onStateChanged(bottomSheet, state); 575f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 576f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 577f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 578e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private void reset() { 579e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mActivePointerId = ViewDragHelper.INVALID_POINTER; 580e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mVelocityTracker != null) { 581e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.recycle(); 582e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker = null; 583e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 584e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 585e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 586657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas boolean shouldHide(View child, float yvel) { 587362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki if (mSkipCollapsed) { 588362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki return true; 589362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki } 590f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (child.getTop() < mMaxOffset) { 591f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki // It should not hide, but collapse. 592f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return false; 593f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 594f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki final float newTop = child.getTop() + yvel * HIDE_FRICTION; 595f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return Math.abs(newTop - mMaxOffset) / (float) mPeekHeight > HIDE_THRESHOLD; 596f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 597f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 59847a4a1aac79f0ad2279c7a3eeaad1673646f4d81Kassim Maguire @VisibleForTesting 59947a4a1aac79f0ad2279c7a3eeaad1673646f4d81Kassim Maguire View findScrollingChild(View view) { 60047a4a1aac79f0ad2279c7a3eeaad1673646f4d81Kassim Maguire if (ViewCompat.isNestedScrollingEnabled(view)) { 6019aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return view; 6029aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 6039aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (view instanceof ViewGroup) { 6049aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki ViewGroup group = (ViewGroup) view; 6059aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki for (int i = 0, count = group.getChildCount(); i < count; i++) { 6069aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki View scrollingChild = findScrollingChild(group.getChildAt(i)); 6079aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (scrollingChild != null) { 6089aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return scrollingChild; 6099aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 6109aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 6119aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 6129aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return null; 613452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 614452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 615e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private float getYVelocity() { 616e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 617374cad6778dfb6923f35bfc28290a9baad22743eAurimas Liutikas return mVelocityTracker.getYVelocity(mActivePointerId); 618e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 619e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 620657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas void startSettlingAnimation(View child, int state) { 621bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki int top; 622bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki if (state == STATE_COLLAPSED) { 623bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki top = mMaxOffset; 624bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki } else if (state == STATE_EXPANDED) { 625bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki top = mMinOffset; 626bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki } else if (mHideable && state == STATE_HIDDEN) { 627bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki top = mParentHeight; 628bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki } else { 629bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki throw new IllegalArgumentException("Illegal state argument: " + state); 630bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki } 631bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki if (mViewDragHelper.smoothSlideViewTo(child, child.getLeft(), top)) { 6325347bf6b48710e49eb2058403329bf821883959fYuichi Araki setStateInternal(STATE_SETTLING); 633bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki ViewCompat.postOnAnimation(child, new SettleRunnable(child, state)); 6345347bf6b48710e49eb2058403329bf821883959fYuichi Araki } else { 6355347bf6b48710e49eb2058403329bf821883959fYuichi Araki setStateInternal(state); 636bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki } 637bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki } 638bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki 639452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private final ViewDragHelper.Callback mDragCallback = new ViewDragHelper.Callback() { 640452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 641452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 642452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean tryCaptureView(View child, int pointerId) { 643e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mState == STATE_DRAGGING) { 644e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return false; 645e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 646b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki if (mTouchingScrollingChild) { 647b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki return false; 648b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki } 649e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mState == STATE_EXPANDED && mActivePointerId == pointerId) { 6509aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki View scroll = mNestedScrollingChildRef.get(); 6519aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (scroll != null && ViewCompat.canScrollVertically(scroll, -1)) { 6529aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki // Let the content scroll up 6539aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return false; 6549aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 6559aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 656f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return mViewRef != null && mViewRef.get() == child; 657f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 658f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 659f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki @Override 660f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) { 661f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki dispatchOnSlide(top); 662452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 663452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 664452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 665452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void onViewDragStateChanged(int state) { 666452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (state == ViewDragHelper.STATE_DRAGGING) { 667452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setStateInternal(STATE_DRAGGING); 668452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 669452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 670452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 671452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 672452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void onViewReleased(View releasedChild, float xvel, float yvel) { 673452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki int top; 674452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State int targetState; 675f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (yvel < 0) { // Moving up 676452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMinOffset; 677452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki targetState = STATE_EXPANDED; 678f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mHideable && shouldHide(releasedChild, yvel)) { 679f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki top = mParentHeight; 680f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki targetState = STATE_HIDDEN; 68149a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else if (yvel == 0.f) { 68249a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki int currentTop = releasedChild.getTop(); 68349a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki if (Math.abs(currentTop - mMinOffset) < Math.abs(currentTop - mMaxOffset)) { 68449a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMinOffset; 68549a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_EXPANDED; 68649a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else { 68749a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMaxOffset; 68849a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_COLLAPSED; 68949a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } 690452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else { 691452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMaxOffset; 692452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki targetState = STATE_COLLAPSED; 693452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 694452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper.settleCapturedViewAt(releasedChild.getLeft(), top)) { 695f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki setStateInternal(STATE_SETTLING); 696452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.postOnAnimation(releasedChild, 697452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki new SettleRunnable(releasedChild, targetState)); 698f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { 699f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki setStateInternal(targetState); 700452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 701452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 702452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 703452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 704452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public int clampViewPositionVertical(View child, int top, int dy) { 70512e0a308d1ab838cb05c395baa6f1251fcbb2363Aurimas Liutikas return MathUtils.clamp(top, mMinOffset, mHideable ? mParentHeight : mMaxOffset); 706452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 707452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 708452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 709452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public int clampViewPositionHorizontal(View child, int left, int dx) { 710452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return child.getLeft(); 711452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 712f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 7139aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki @Override 7149aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki public int getViewVerticalDragRange(View child) { 7159aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (mHideable) { 7169aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return mParentHeight - mMinOffset; 7179aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } else { 7189aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return mMaxOffset - mMinOffset; 7199aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 7209aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 721452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki }; 722452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 723657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas void dispatchOnSlide(int top) { 724dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki View bottomSheet = mViewRef.get(); 725dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki if (bottomSheet != null && mCallback != null) { 726f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (top > mMaxOffset) { 727e9864e3df037a1a5610752c6addc4d71e6b292c7Yuichi Araki mCallback.onSlide(bottomSheet, (float) (mMaxOffset - top) / 728e9864e3df037a1a5610752c6addc4d71e6b292c7Yuichi Araki (mParentHeight - mMaxOffset)); 729f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { 730dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki mCallback.onSlide(bottomSheet, 731dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki (float) (mMaxOffset - top) / ((mMaxOffset - mMinOffset))); 732f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 733f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 734f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 735f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 736a7a51521e1ecd8a009e4bd618520af05d9917671Yuichi Araki @VisibleForTesting 737a7a51521e1ecd8a009e4bd618520af05d9917671Yuichi Araki int getPeekHeightMin() { 738a7a51521e1ecd8a009e4bd618520af05d9917671Yuichi Araki return mPeekHeightMin; 739a7a51521e1ecd8a009e4bd618520af05d9917671Yuichi Araki } 740a7a51521e1ecd8a009e4bd618520af05d9917671Yuichi Araki 741452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private class SettleRunnable implements Runnable { 742452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 743452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private final View mView; 744452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 745452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 746452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private final int mTargetState; 747452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 748452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki SettleRunnable(View view, @State int targetState) { 749452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mView = view; 750452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mTargetState = targetState; 751452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 752452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 753452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 754452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void run() { 755452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper != null && mViewDragHelper.continueSettling(true)) { 756452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.postOnAnimation(mView, this); 757452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else { 758452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setStateInternal(mTargetState); 759452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 760452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 761452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 762452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 76305f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes protected static class SavedState extends AbsSavedState { 764452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 765452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki final int state; 766452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 767452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState(Parcel source) { 76805f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes this(source, null); 76905f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes } 77005f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes 77105f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes public SavedState(Parcel source, ClassLoader loader) { 77205f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes super(source, loader); 773452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki //noinspection ResourceType 774452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki state = source.readInt(); 775452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 776452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 777452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState(Parcelable superState, @State int state) { 778452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super(superState); 779452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki this.state = state; 780452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 781452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 782452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 783452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void writeToParcel(Parcel out, int flags) { 784452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super.writeToParcel(out, flags); 785452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki out.writeInt(state); 786452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 787452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 7884b25d63ff53d4676150ac54897851e4ff9f1049fAurimas Liutikas public static final Creator<SavedState> CREATOR = new ClassLoaderCreator<SavedState>() { 7894b25d63ff53d4676150ac54897851e4ff9f1049fAurimas Liutikas @Override 7904b25d63ff53d4676150ac54897851e4ff9f1049fAurimas Liutikas public SavedState createFromParcel(Parcel in, ClassLoader loader) { 7914b25d63ff53d4676150ac54897851e4ff9f1049fAurimas Liutikas return new SavedState(in, loader); 7924b25d63ff53d4676150ac54897851e4ff9f1049fAurimas Liutikas } 7934b25d63ff53d4676150ac54897851e4ff9f1049fAurimas Liutikas 7944b25d63ff53d4676150ac54897851e4ff9f1049fAurimas Liutikas @Override 7954b25d63ff53d4676150ac54897851e4ff9f1049fAurimas Liutikas public SavedState createFromParcel(Parcel in) { 7964b25d63ff53d4676150ac54897851e4ff9f1049fAurimas Liutikas return new SavedState(in, null); 7974b25d63ff53d4676150ac54897851e4ff9f1049fAurimas Liutikas } 798452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 7994b25d63ff53d4676150ac54897851e4ff9f1049fAurimas Liutikas @Override 8004b25d63ff53d4676150ac54897851e4ff9f1049fAurimas Liutikas public SavedState[] newArray(int size) { 8014b25d63ff53d4676150ac54897851e4ff9f1049fAurimas Liutikas return new SavedState[size]; 8024b25d63ff53d4676150ac54897851e4ff9f1049fAurimas Liutikas } 8034b25d63ff53d4676150ac54897851e4ff9f1049fAurimas Liutikas }; 804452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 805452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 806f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 807452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * A utility function to get the {@link BottomSheetBehavior} associated with the {@code view}. 808452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 809452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param view The {@link View} with {@link BottomSheetBehavior}. 810452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @return The {@link BottomSheetBehavior} associated with the {@code view}. 811452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 812452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @SuppressWarnings("unchecked") 813452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static <V extends View> BottomSheetBehavior<V> from(V view) { 814452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewGroup.LayoutParams params = view.getLayoutParams(); 815452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (!(params instanceof CoordinatorLayout.LayoutParams)) { 816452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki throw new IllegalArgumentException("The view is not a child of CoordinatorLayout"); 817452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 818452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki CoordinatorLayout.Behavior behavior = ((CoordinatorLayout.LayoutParams) params) 819452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki .getBehavior(); 820452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (!(behavior instanceof BottomSheetBehavior)) { 821452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki throw new IllegalArgumentException( 822452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki "The view is not associated with BottomSheetBehavior"); 823452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 824452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return (BottomSheetBehavior<V>) behavior; 825452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 826452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 827452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki} 828