package com.mm.android.deviceaddmodule.mobilecommon.widget.slidinguplayout;
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import android.annotation.SuppressLint;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.graphics.Canvas;
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import android.graphics.Paint;
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import android.graphics.PixelFormat;
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import android.graphics.Rect;
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import android.graphics.drawable.Drawable;
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import android.os.Bundle;
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import android.os.Parcelable;
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import android.support.v4.view.MotionEventCompat;
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import android.support.v4.view.ViewCompat;
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import android.util.AttributeSet;
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import android.view.Gravity;
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import android.view.MotionEvent;
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import android.view.View;
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import android.view.ViewGroup;
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import android.view.accessibility.AccessibilityEvent;
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import android.view.animation.AnimationUtils;
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import android.view.animation.Interpolator;
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import com.mm.android.deviceaddmodule.R;
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import com.mm.android.deviceaddmodule.mobilecommon.utils.LogUtil;
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import java.util.List;
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import java.util.concurrent.CopyOnWriteArrayList;
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public class SlidingUpPanelLayout extends ViewGroup {
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private static final String TAG = SlidingUpPanelLayout.class.getSimpleName();
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/**
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* Default peeking out panel heightumanoScrollableView
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*/
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private static final int DEFAULT_PANEL_HEIGHT = 68; // dp;
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/**
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* Default anchor point height
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*/
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private static final float DEFAULT_ANCHOR_POINT = 1.0f; // In relative %
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/**
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* Default initial state for the component
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*/
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private static PanelState DEFAULT_SLIDE_STATE = PanelState.COLLAPSED;
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/**
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* Default height of the shadow above the peeking out panel
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*/
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private static final int DEFAULT_SHADOW_HEIGHT = 4; // dp;
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/**
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* If no fade color is given by default it will fade to 80% gray.
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*/
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private static final int DEFAULT_FADE_COLOR = 0x99000000;
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/**
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* Default Minimum velocity that will be detected as a fling
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*/
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private static final int DEFAULT_MIN_FLING_VELOCITY = 400; // dips per second
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/**
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* Default is set to false because that is how it was written
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*/
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private static final boolean DEFAULT_OVERLAY_FLAG = false;
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/**
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* Default is set to true for clip panel for performance reasons
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*/
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private static final boolean DEFAULT_CLIP_PANEL_FLAG = true;
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/**
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* Default attributes for layout
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*/
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private static final int[] DEFAULT_ATTRS = new int[]{
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android.R.attr.gravity
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};
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/**
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* Tag for the sliding state stored inside the bundle
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*/
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public static final String SLIDING_STATE = "sliding_state";
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/**
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* Minimum velocity that will be detected as a fling
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*/
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private int mMinFlingVelocity = DEFAULT_MIN_FLING_VELOCITY;
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/**
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* The fade color used for the panel covered by the slider. 0 = no fading.
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*/
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private int mCoveredFadeColor = DEFAULT_FADE_COLOR;
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/**
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* Default parallax length of the main view
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*/
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private static final int DEFAULT_PARALLAX_OFFSET = 0;
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/**
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* The paint used to dim the main layout when sliding
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*/
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private final Paint mCoveredFadePaint = new Paint();
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/**
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* Drawable used to draw the shadow between panes.
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*/
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private final Drawable mShadowDrawable;
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/**
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* The size of the overhang in pixels.
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*/
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private int mPanelHeight = -1;
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/**
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* The size of the shadow in pixels.
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*/
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private int mShadowHeight = -1;
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/**
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* Parallax offset
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*/
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private int mParallaxOffset = -1;
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/**
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* True if the collapsed panel should be dragged up.
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*/
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private boolean mIsSlidingUp;
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/**
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* Panel overlays the windows instead of putting it underneath it.
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*/
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private boolean mOverlayContent = DEFAULT_OVERLAY_FLAG;
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/**
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* The main view is clipped to the main top border
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*/
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private boolean mClipPanel = DEFAULT_CLIP_PANEL_FLAG;
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/**
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* If provided, the panel can be dragged by only this view. Otherwise, the entire panel can be
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* used for dragging.
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*/
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private View mDragView;
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/**
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* If provided, the panel can be dragged by only this view. Otherwise, the entire panel can be
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* used for dragging.
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*/
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private int mDragViewResId = -1;
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/**
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* If provided, the panel will transfer the scroll from this view to itself when needed.
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*/
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private View mScrollableView;
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private int mScrollableViewResId;
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private ScrollableViewHelper mScrollableViewHelper = new ScrollableViewHelper();
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/**
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* The child view that can slide, if any.
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*/
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private View mSlideableView;
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/**
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* The main view
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*/
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private View mMainView;
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/**
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* Current state of the slideable view.
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*/
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public enum PanelState {
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EXPANDED,
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COLLAPSED,
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ANCHORED,
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HIDDEN,
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DRAGGING
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}
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private PanelState mSlideState = DEFAULT_SLIDE_STATE;
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/**
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* If the current slide state is DRAGGING, this will store the last non dragging state
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*/
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private PanelState mLastNotDraggingSlideState = DEFAULT_SLIDE_STATE;
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/**
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* How far the panel is offset from its expanded position.
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* range [0, 1] where 0 = collapsed, 1 = expanded.
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*/
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private float mSlideOffset;
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/**
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* How far in pixels the slideable panel may move.
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*/
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private int mSlideRange;
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/**
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* An anchor point where the panel can stop during sliding
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*/
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private float mAnchorPoint = 1.f;
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/**
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* A panel view is locked into internal scrolling or another condition that
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* is preventing a drag.
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*/
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private boolean mIsUnableToDrag;
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/**
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* Flag indicating that sliding feature is enabled\disabled
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*/
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private boolean mIsTouchEnabled;
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private float mPrevMotionX;
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private float mPrevMotionY;
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private float mInitialMotionX;
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private float mInitialMotionY;
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private boolean mIsScrollableViewHandlingTouch = false;
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private final List<PanelSlideListener> mPanelSlideListeners = new CopyOnWriteArrayList<>();
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private OnClickListener mFadeOnClickListener;
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private final ViewDragHelper mDragHelper;
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/**
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* Stores whether or not the pane was expanded the last time it was slideable.
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* If expand/collapse operations are invoked this state is modified. Used by
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* instance state save/restore.
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*/
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private boolean mFirstLayout = true;
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private final Rect mTmpRect = new Rect();
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/**
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* Listener for monitoring events about sliding panes.
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*/
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public interface PanelSlideListener {
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/**
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* Called when a sliding pane's position changes.
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*
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* @param panel The child view that was moved
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* @param slideOffset The new offset of this sliding pane within its range, from 0-1
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*/
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public void onPanelSlide(View panel, float slideOffset);
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/**
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* Called when a sliding panel state changes
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*
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* @param panel The child view that was slid to an collapsed position
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*/
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public void onPanelStateChanged(View panel, PanelState previousState, PanelState newState);
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}
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/**
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* No-op stubs for {@link PanelSlideListener}. If you only want to implement a subset
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* of the listener methods you can extend this instead of implement the full interface.
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*/
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public static class SimplePanelSlideListener implements PanelSlideListener {
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@Override
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public void onPanelSlide(View panel, float slideOffset) {
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}
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@Override
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public void onPanelStateChanged(View panel, PanelState previousState, PanelState newState) {
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}
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}
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public SlidingUpPanelLayout(Context context) {
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this(context, null);
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}
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public SlidingUpPanelLayout(Context context, AttributeSet attrs) {
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this(context, attrs, 0);
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}
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public SlidingUpPanelLayout(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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if (isInEditMode()) {
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mShadowDrawable = null;
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mDragHelper = null;
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return;
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}
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Interpolator scrollerInterpolator = null;
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if (attrs != null) {
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TypedArray defAttrs = context.obtainStyledAttributes(attrs, DEFAULT_ATTRS);
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if (defAttrs != null) {
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int gravity = defAttrs.getInt(0, Gravity.NO_GRAVITY);
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setGravity(gravity);
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defAttrs.recycle();
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}
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TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.SlidingUpPanelLayout);
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if (ta != null) {
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mPanelHeight = ta.getDimensionPixelSize(R.styleable.SlidingUpPanelLayout_umanoPanelHeight, -1);
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mShadowHeight = ta.getDimensionPixelSize(R.styleable.SlidingUpPanelLayout_umanoShadowHeight, -1);
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mParallaxOffset = ta.getDimensionPixelSize(R.styleable.SlidingUpPanelLayout_umanoParallaxOffset, -1);
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mMinFlingVelocity = ta.getInt(R.styleable.SlidingUpPanelLayout_umanoFlingVelocity, DEFAULT_MIN_FLING_VELOCITY);
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mCoveredFadeColor = ta.getColor(R.styleable.SlidingUpPanelLayout_umanoFadeColor, DEFAULT_FADE_COLOR);
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mDragViewResId = ta.getResourceId(R.styleable.SlidingUpPanelLayout_umanoDragView, -1);
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mScrollableViewResId = ta.getResourceId(R.styleable.SlidingUpPanelLayout_umanoScrollableView, -1);
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mOverlayContent = ta.getBoolean(R.styleable.SlidingUpPanelLayout_umanoOverlay, DEFAULT_OVERLAY_FLAG);
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mClipPanel = ta.getBoolean(R.styleable.SlidingUpPanelLayout_umanoClipPanel, DEFAULT_CLIP_PANEL_FLAG);
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mAnchorPoint = ta.getFloat(R.styleable.SlidingUpPanelLayout_umanoAnchorPoint, DEFAULT_ANCHOR_POINT);
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mSlideState = PanelState.values()[ta.getInt(R.styleable.SlidingUpPanelLayout_umanoInitialState, DEFAULT_SLIDE_STATE.ordinal())];
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int interpolatorResId = ta.getResourceId(R.styleable.SlidingUpPanelLayout_umanoScrollInterpolator, -1);
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ta.recycle();
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if (interpolatorResId != -1) {
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scrollerInterpolator = AnimationUtils.loadInterpolator(context, interpolatorResId);
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}
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}
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}
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final float density = context.getResources().getDisplayMetrics().density;
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if (mPanelHeight == -1) {
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mPanelHeight = (int) (DEFAULT_PANEL_HEIGHT * density + 0.5f);
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}
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if (mShadowHeight == -1) {
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mShadowHeight = (int) (DEFAULT_SHADOW_HEIGHT * density + 0.5f);
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}
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if (mParallaxOffset == -1) {
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mParallaxOffset = (int) (DEFAULT_PARALLAX_OFFSET * density);
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}
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// If the shadow height is zero, don't show the shadow
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if (mShadowHeight > 0) {
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if (mIsSlidingUp) {
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mShadowDrawable = getResources().getDrawable(R.drawable.above_shadow);
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} else {
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mShadowDrawable = getResources().getDrawable(R.drawable.below_shadow);
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}
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} else {
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mShadowDrawable = null;
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}
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setWillNotDraw(false);
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mDragHelper = ViewDragHelper.create(this, 0.5f, scrollerInterpolator, new DragHelperCallback());
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mDragHelper.setMinVelocity(mMinFlingVelocity * density);
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mIsTouchEnabled = true;
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}
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/**
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* Set the Drag View after the view is inflated
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*/
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@Override
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protected void onFinishInflate() {
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super.onFinishInflate();
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if (mDragViewResId != -1) {
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setDragView(findViewById(mDragViewResId));
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}
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if (mScrollableViewResId != -1) {
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setScrollableView(findViewById(mScrollableViewResId));
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}
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}
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public void setGravity(int gravity) {
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if (gravity != Gravity.TOP && gravity != Gravity.BOTTOM) {
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throw new IllegalArgumentException("gravity must be set to either top or bottom");
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}
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mIsSlidingUp = gravity == Gravity.BOTTOM;
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if (!mFirstLayout) {
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requestLayout();
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}
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}
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/**
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* Set the color used to fade the pane covered by the sliding pane out when the pane
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* will become fully covered in the expanded state.
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*
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* @param color An ARGB-packed color value
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*/
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public void setCoveredFadeColor(int color) {
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mCoveredFadeColor = color;
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requestLayout();
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}
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/**
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* @return The ARGB-packed color value used to fade the fixed pane
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*/
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public int getCoveredFadeColor() {
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return mCoveredFadeColor;
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}
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/**
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* Set sliding enabled flag
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*
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* @param enabled flag value
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*/
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public void setTouchEnabled(boolean enabled) {
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mIsTouchEnabled = enabled;
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}
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public boolean isTouchEnabled() {
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return mIsTouchEnabled && mSlideableView != null && mSlideState != PanelState.HIDDEN;
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}
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/**
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* Set the collapsed panel height in pixels
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*
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* @param val A height in pixels
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*/
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public void setPanelHeight(int val) {
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if (getPanelHeight() == val) {
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return;
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}
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mPanelHeight = val;
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if (!mFirstLayout) {
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requestLayout();
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}
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if (getPanelState() == PanelState.COLLAPSED) {
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smoothToBottom();
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invalidate();
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return;
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}
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}
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protected void smoothToBottom() {
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smoothSlideTo(0, 0);
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}
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/**
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* @return The current shadow height
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*/
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public int getShadowHeight() {
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return mShadowHeight;
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}
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/**
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* Set the shadow height
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*
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* @param val A height in pixels
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*/
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public void setShadowHeight(int val) {
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mShadowHeight = val;
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if (!mFirstLayout) {
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invalidate();
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}
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}
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/**
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* @return The current collapsed panel height
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*/
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public int getPanelHeight() {
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return mPanelHeight;
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}
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/**
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* @return The current parallax offset
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*/
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public int getCurrentParallaxOffset() {
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// Clamp slide offset at zero for parallax computation;
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int offset = (int) (mParallaxOffset * Math.max(mSlideOffset, 0));
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return mIsSlidingUp ? -offset : offset;
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}
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/**
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* Set parallax offset for the panel
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*
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* @param val A height in pixels
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*/
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public void setParallaxOffset(int val) {
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mParallaxOffset = val;
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if (!mFirstLayout) {
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requestLayout();
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}
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}
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/**
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* @return The current minimin fling velocity
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*/
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public int getMinFlingVelocity() {
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return mMinFlingVelocity;
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}
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/**
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* Sets the minimum fling velocity for the panel
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*
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* @param val the new value
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*/
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public void setMinFlingVelocity(int val) {
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mMinFlingVelocity = val;
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}
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/**
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* Adds a panel slide listener
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*
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* @param listener
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*/
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public void addPanelSlideListener(PanelSlideListener listener) {
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synchronized (mPanelSlideListeners) {
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mPanelSlideListeners.add(listener);
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}
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}
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/**
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* Removes a panel slide listener
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*
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* @param listener
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*/
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public void removePanelSlideListener(PanelSlideListener listener) {
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synchronized (mPanelSlideListeners) {
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mPanelSlideListeners.remove(listener);
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}
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}
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/**
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* Provides an on click for the portion of the main view that is dimmed. The listener is not
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* triggered if the panel is in a collapsed or a hidden position. If the on click listener is
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* not provided, the clicks on the dimmed area are passed through to the main layout.
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*
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* @param listener
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*/
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public void setFadeOnClickListener(OnClickListener listener) {
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mFadeOnClickListener = listener;
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}
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/**
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* Set the draggable view portion. Use to null, to allow the whole panel to be draggable
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*
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* @param dragView A view that will be used to drag the panel.
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*/
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public void setDragView(View dragView) {
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if (mDragView != null) {
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mDragView.setOnClickListener(null);
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}
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mDragView = dragView;
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if (mDragView != null) {
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mDragView.setClickable(true);
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mDragView.setFocusable(false);
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mDragView.setFocusableInTouchMode(false);
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mDragView.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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if (!isEnabled() || !isTouchEnabled()) return;
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if (mSlideState != PanelState.EXPANDED && mSlideState != PanelState.ANCHORED) {
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if (mAnchorPoint < 1.0f) {
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setPanelState(PanelState.ANCHORED);
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} else {
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setPanelState(PanelState.EXPANDED);
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}
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} else {
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setPanelState(PanelState.COLLAPSED);
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}
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}
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});
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;
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}
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}
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/**
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* Set the draggable view portion. Use to null, to allow the whole panel to be draggable
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*
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* @param dragViewResId The resource ID of the new drag view
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*/
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public void setDragView(int dragViewResId) {
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mDragViewResId = dragViewResId;
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setDragView(findViewById(dragViewResId));
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}
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/**
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* Set the scrollable child of the sliding layout. If set, scrolling will be transfered between
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* the panel and the view when necessary
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*
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* @param scrollableView The scrollable view
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*/
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public void setScrollableView(View scrollableView) {
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mScrollableView = scrollableView;
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}
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/**
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* Sets the current scrollable view helper. See ScrollableViewHelper description for details.
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*
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* @param helper
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*/
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public void setScrollableViewHelper(ScrollableViewHelper helper) {
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mScrollableViewHelper = helper;
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}
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/**
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* Set an anchor point where the panel can stop during sliding
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*
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* @param anchorPoint A value between 0 and 1, determining the position of the anchor point
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* starting from the top of the layout.
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*/
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public void setAnchorPoint(float anchorPoint) {
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if (anchorPoint > 0 && anchorPoint <= 1) {
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mAnchorPoint = anchorPoint;
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mFirstLayout = true;
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requestLayout();
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}
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}
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/**
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* Gets the currently set anchor point
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*
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* @return the currently set anchor point
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*/
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public float getAnchorPoint() {
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return mAnchorPoint;
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}
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/**
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* Sets whether or not the panel overlays the content
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*
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* @param overlayed
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*/
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public void setOverlayed(boolean overlayed) {
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mOverlayContent = overlayed;
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}
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/**
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* Check if the panel is set as an overlay.
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*/
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public boolean isOverlayed() {
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return mOverlayContent;
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}
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/**
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* Sets whether or not the main content is clipped to the top of the panel
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*
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* @param clip
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*/
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public void setClipPanel(boolean clip) {
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mClipPanel = clip;
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}
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/**
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* Check whether or not the main content is clipped to the top of the panel
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*/
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public boolean isClipPanel() {
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return mClipPanel;
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}
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void dispatchOnPanelSlide(View panel) {
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synchronized (mPanelSlideListeners) {
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for (PanelSlideListener l : mPanelSlideListeners) {
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l.onPanelSlide(panel, mSlideOffset);
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}
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}
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}
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void dispatchOnPanelStateChanged(View panel, PanelState previousState, PanelState newState) {
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synchronized (mPanelSlideListeners) {
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for (PanelSlideListener l : mPanelSlideListeners) {
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l.onPanelStateChanged(panel, previousState, newState);
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}
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}
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sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
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}
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void updateObscuredViewVisibility() {
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if (getChildCount() == 0) {
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return;
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}
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final int leftBound = getPaddingLeft();
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final int rightBound = getWidth() - getPaddingRight();
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final int topBound = getPaddingTop();
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final int bottomBound = getHeight() - getPaddingBottom();
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final int left;
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final int right;
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final int top;
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final int bottom;
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if (mSlideableView != null && hasOpaqueBackground(mSlideableView)) {
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left = mSlideableView.getLeft();
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right = mSlideableView.getRight();
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top = mSlideableView.getTop();
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bottom = mSlideableView.getBottom();
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} else {
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left = right = top = bottom = 0;
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}
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View child = getChildAt(0);
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final int clampedChildLeft = Math.max(leftBound, child.getLeft());
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final int clampedChildTop = Math.max(topBound, child.getTop());
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final int clampedChildRight = Math.min(rightBound, child.getRight());
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final int clampedChildBottom = Math.min(bottomBound, child.getBottom());
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final int vis;
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if (clampedChildLeft >= left && clampedChildTop >= top &&
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clampedChildRight <= right && clampedChildBottom <= bottom) {
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vis = INVISIBLE;
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} else {
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vis = VISIBLE;
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}
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child.setVisibility(vis);
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}
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void setAllChildrenVisible() {
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for (int i = 0, childCount = getChildCount(); i < childCount; i++) {
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final View child = getChildAt(i);
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if (child.getVisibility() == INVISIBLE) {
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child.setVisibility(VISIBLE);
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}
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}
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}
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private static boolean hasOpaqueBackground(View v) {
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final Drawable bg = v.getBackground();
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return bg != null && bg.getOpacity() == PixelFormat.OPAQUE;
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}
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@Override
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protected void onAttachedToWindow() {
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super.onAttachedToWindow();
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mFirstLayout = true;
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}
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@Override
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protected void onDetachedFromWindow() {
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super.onDetachedFromWindow();
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mFirstLayout = true;
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
|
final int widthMode = MeasureSpec.getMode(widthMeasureSpec);
|
final int widthSize = MeasureSpec.getSize(widthMeasureSpec);
|
final int heightMode = MeasureSpec.getMode(heightMeasureSpec);
|
final int heightSize = MeasureSpec.getSize(heightMeasureSpec);
|
|
if (widthMode != MeasureSpec.EXACTLY && widthMode != MeasureSpec.AT_MOST) {
|
throw new IllegalStateException("Width must have an exact value or MATCH_PARENT");
|
} else if (heightMode != MeasureSpec.EXACTLY && heightMode != MeasureSpec.AT_MOST) {
|
throw new IllegalStateException("Height must have an exact value or MATCH_PARENT");
|
}
|
|
final int childCount = getChildCount();
|
|
if (childCount != 2) {
|
throw new IllegalStateException("Sliding up panel layout must have exactly 2 children!");
|
}
|
|
mMainView = getChildAt(0);
|
mSlideableView = getChildAt(1);
|
if (mDragView == null) {
|
setDragView(mSlideableView);
|
}
|
|
// If the sliding panel is not visible, then put the whole view in the hidden state
|
if (mSlideableView.getVisibility() != VISIBLE) {
|
mSlideState = PanelState.HIDDEN;
|
}
|
|
int layoutHeight = heightSize - getPaddingTop() - getPaddingBottom();
|
int layoutWidth = widthSize - getPaddingLeft() - getPaddingRight();
|
|
// First pass. Measure based on child LayoutParams width/height.
|
for (int i = 0; i < childCount; i++) {
|
final View child = getChildAt(i);
|
final LayoutParams lp = (LayoutParams) child.getLayoutParams();
|
|
// We always measure the sliding panel in order to know it's height (needed for show panel)
|
if (child.getVisibility() == GONE && i == 0) {
|
continue;
|
}
|
|
int height = layoutHeight;
|
int width = layoutWidth;
|
if (child == mMainView) {
|
if (!mOverlayContent && mSlideState != PanelState.HIDDEN) {
|
height -= mPanelHeight;
|
}
|
|
width -= lp.leftMargin + lp.rightMargin;
|
} else if (child == mSlideableView) {
|
// The slideable view should be aware of its top margin.
|
// See https://github.com/umano/AndroidSlidingUpPanel/issues/412.
|
height -= lp.topMargin;
|
}
|
|
int childWidthSpec;
|
if (lp.width == LayoutParams.WRAP_CONTENT) {
|
childWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.AT_MOST);
|
} else if (lp.width == LayoutParams.MATCH_PARENT) {
|
childWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY);
|
} else {
|
childWidthSpec = MeasureSpec.makeMeasureSpec(lp.width, MeasureSpec.EXACTLY);
|
}
|
|
int childHeightSpec;
|
if (lp.height == LayoutParams.WRAP_CONTENT) {
|
childHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.AT_MOST);
|
} else {
|
// Modify the height based on the weight.
|
if (lp.weight > 0 && lp.weight < 1) {
|
height = (int) (height * lp.weight);
|
} else if (lp.height != LayoutParams.MATCH_PARENT) {
|
height = lp.height;
|
}
|
childHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
|
}
|
|
child.measure(childWidthSpec, childHeightSpec);
|
|
if (child == mSlideableView) {
|
mSlideRange = mSlideableView.getMeasuredHeight() - mPanelHeight;
|
}
|
}
|
|
setMeasuredDimension(widthSize, heightSize);
|
}
|
|
@Override
|
protected void onLayout(boolean changed, int l, int t, int r, int b) {
|
final int paddingLeft = getPaddingLeft();
|
final int paddingTop = getPaddingTop();
|
|
final int childCount = getChildCount();
|
|
if (mFirstLayout) {
|
switch (mSlideState) {
|
case EXPANDED:
|
mSlideOffset = 1.0f;
|
break;
|
case ANCHORED:
|
mSlideOffset = mAnchorPoint;
|
break;
|
case HIDDEN:
|
int newTop = computePanelTopPosition(0.0f) + (mIsSlidingUp ? +mPanelHeight : -mPanelHeight);
|
mSlideOffset = computeSlideOffset(newTop);
|
break;
|
default:
|
mSlideOffset = 0.f;
|
break;
|
}
|
}
|
|
for (int i = 0; i < childCount; i++) {
|
final View child = getChildAt(i);
|
final LayoutParams lp = (LayoutParams) child.getLayoutParams();
|
|
// Always layout the sliding view on the first layout
|
if (child.getVisibility() == GONE && (i == 0 || mFirstLayout)) {
|
continue;
|
}
|
|
final int childHeight = child.getMeasuredHeight();
|
int childTop = paddingTop;
|
|
if (child == mSlideableView) {
|
childTop = computePanelTopPosition(mSlideOffset);
|
}
|
|
if (!mIsSlidingUp) {
|
if (child == mMainView && !mOverlayContent) {
|
childTop = computePanelTopPosition(mSlideOffset) + mSlideableView.getMeasuredHeight();
|
}
|
}
|
final int childBottom = childTop + childHeight;
|
final int childLeft = paddingLeft + lp.leftMargin;
|
final int childRight = childLeft + child.getMeasuredWidth();
|
|
child.layout(childLeft, childTop, childRight, childBottom);
|
}
|
|
if (mFirstLayout) {
|
updateObscuredViewVisibility();
|
}
|
applyParallaxForCurrentSlideOffset();
|
|
mFirstLayout = false;
|
}
|
|
@Override
|
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
|
super.onSizeChanged(w, h, oldw, oldh);
|
// Recalculate sliding panes and their details
|
if (h != oldh) {
|
mFirstLayout = true;
|
}
|
}
|
|
@Override
|
public boolean onInterceptTouchEvent(MotionEvent ev) {
|
// If the scrollable view is handling touch, never intercept
|
if (mIsScrollableViewHandlingTouch || !isTouchEnabled()) {
|
mDragHelper.abort();
|
return false;
|
}
|
|
final int action = MotionEventCompat.getActionMasked(ev);
|
final float x = ev.getX();
|
final float y = ev.getY();
|
final float adx = Math.abs(x - mInitialMotionX);
|
final float ady = Math.abs(y - mInitialMotionY);
|
final int dragSlop = mDragHelper.getTouchSlop();
|
|
switch (action) {
|
case MotionEvent.ACTION_DOWN: {
|
mIsUnableToDrag = false;
|
mInitialMotionX = x;
|
mInitialMotionY = y;
|
if (!isViewUnder(mDragView, (int) x, (int) y)) {
|
mDragHelper.cancel();
|
mIsUnableToDrag = true;
|
return false;
|
}
|
|
break;
|
}
|
|
case MotionEvent.ACTION_MOVE: {
|
if (ady > dragSlop && adx > ady) {
|
mDragHelper.cancel();
|
mIsUnableToDrag = true;
|
return false;
|
}
|
break;
|
}
|
|
case MotionEvent.ACTION_CANCEL:
|
case MotionEvent.ACTION_UP:
|
// If the dragView is still dragging when we get here, we need to call processTouchEvent
|
// so that the view is settled
|
// Added to make scrollable views work (tokudu)
|
if (mDragHelper.isDragging()) {
|
mDragHelper.processTouchEvent(ev);
|
return true;
|
}
|
// Check if this was a click on the faded part of the screen, and fire off the listener if there is one.
|
if (ady <= dragSlop
|
&& adx <= dragSlop
|
&& mSlideOffset > 0 && !isViewUnder(mSlideableView, (int) mInitialMotionX, (int) mInitialMotionY) && mFadeOnClickListener != null) {
|
playSoundEffect(android.view.SoundEffectConstants.CLICK);
|
mFadeOnClickListener.onClick(this);
|
return true;
|
}
|
break;
|
}
|
return mDragHelper.shouldInterceptTouchEvent(ev);
|
}
|
|
@Override
|
public boolean onTouchEvent(MotionEvent ev) {
|
if (!isEnabled() || !isTouchEnabled()) {
|
return super.onTouchEvent(ev);
|
}
|
try {
|
mDragHelper.processTouchEvent(ev);
|
return true;
|
} catch (Exception ex) {
|
// Ignore the pointer out of range exception
|
return false;
|
}
|
}
|
|
@Override
|
public boolean dispatchTouchEvent(MotionEvent ev) {
|
final int action = MotionEventCompat.getActionMasked(ev);
|
|
if (!isEnabled() || !isTouchEnabled() || (mIsUnableToDrag && action != MotionEvent.ACTION_DOWN)) {
|
mDragHelper.abort();
|
return super.dispatchTouchEvent(ev);
|
}
|
|
final float x = ev.getX();
|
final float y = ev.getY();
|
|
if (action == MotionEvent.ACTION_DOWN) {
|
mIsScrollableViewHandlingTouch = false;
|
mPrevMotionX = x;
|
mPrevMotionY = y;
|
} else if (action == MotionEvent.ACTION_MOVE) {
|
float dx = x - mPrevMotionX;
|
float dy = y - mPrevMotionY;
|
mPrevMotionX = x;
|
mPrevMotionY = y;
|
|
if (Math.abs(dx) > Math.abs(dy)) {
|
// Scrolling horizontally, so ignore
|
return super.dispatchTouchEvent(ev);
|
}
|
|
// If the scroll view isn't under the touch, pass the
|
// event along to the dragView.
|
if (!isViewUnder(mScrollableView, (int) mInitialMotionX, (int) mInitialMotionY)) {
|
return super.dispatchTouchEvent(ev);
|
}
|
|
// Which direction (up or down) is the drag moving?
|
if (dy * (mIsSlidingUp ? 1 : -1) > 0) { // Collapsing
|
// Is the child less than fully scrolled?
|
// Then let the child handle it.
|
if (mScrollableViewHelper.getScrollableViewScrollPosition(mScrollableView, mIsSlidingUp) > 0) {
|
mIsScrollableViewHandlingTouch = true;
|
return super.dispatchTouchEvent(ev);
|
}
|
|
// Was the child handling the touch previously?
|
// Then we need to rejigger things so that the
|
// drag panel gets a proper down event.
|
if (mIsScrollableViewHandlingTouch) {
|
// Send an 'UP' event to the child.
|
MotionEvent up = MotionEvent.obtain(ev);
|
up.setAction(MotionEvent.ACTION_CANCEL);
|
super.dispatchTouchEvent(up);
|
up.recycle();
|
|
// Send a 'DOWN' event to the panel. (We'll cheat
|
// and hijack this one)
|
ev.setAction(MotionEvent.ACTION_DOWN);
|
}
|
|
mIsScrollableViewHandlingTouch = false;
|
return this.onTouchEvent(ev);
|
} else if (dy * (mIsSlidingUp ? 1 : -1) < 0) { // Expanding
|
// Is the panel less than fully expanded?
|
// Then we'll handle the drag here.
|
if (mSlideOffset < 1.0f) {
|
mIsScrollableViewHandlingTouch = false;
|
return this.onTouchEvent(ev);
|
}
|
|
// Was the panel handling the touch previously?
|
// Then we need to rejigger things so that the
|
// child gets a proper down event.
|
if (!mIsScrollableViewHandlingTouch && mDragHelper.isDragging()) {
|
mDragHelper.cancel();
|
ev.setAction(MotionEvent.ACTION_DOWN);
|
}
|
|
mIsScrollableViewHandlingTouch = true;
|
return super.dispatchTouchEvent(ev);
|
}
|
} else if (action == MotionEvent.ACTION_UP) {
|
// If the scrollable view was handling the touch and we receive an up
|
// we want to clear any previous dragging state so we don't intercept a touch stream accidentally
|
if (mIsScrollableViewHandlingTouch) {
|
mDragHelper.setDragState(ViewDragHelper.STATE_IDLE);
|
}
|
}
|
|
// In all other cases, just let the default behavior take over.
|
return super.dispatchTouchEvent(ev);
|
}
|
|
private boolean isViewUnder(View view, int x, int y) {
|
if (view == null) return false;
|
int[] viewLocation = new int[2];
|
view.getLocationOnScreen(viewLocation);
|
int[] parentLocation = new int[2];
|
this.getLocationOnScreen(parentLocation);
|
int screenX = parentLocation[0] + x;
|
int screenY = parentLocation[1] + y;
|
return screenX >= viewLocation[0] && screenX < viewLocation[0] + view.getWidth() &&
|
screenY >= viewLocation[1] && screenY < viewLocation[1] + view.getHeight();
|
}
|
|
/*
|
* Computes the top position of the panel based on the slide offset.
|
*/
|
private int computePanelTopPosition(float slideOffset) {
|
int slidingViewHeight = mSlideableView != null ? mSlideableView.getMeasuredHeight() : 0;
|
int slidePixelOffset = (int) (slideOffset * mSlideRange);
|
// Compute the top of the panel if its collapsed
|
return mIsSlidingUp
|
? getMeasuredHeight() - getPaddingBottom() - mPanelHeight - slidePixelOffset
|
: getPaddingTop() - slidingViewHeight + mPanelHeight + slidePixelOffset;
|
}
|
|
/*
|
* Computes the slide offset based on the top position of the panel
|
*/
|
private float computeSlideOffset(int topPosition) {
|
// Compute the panel top position if the panel is collapsed (offset 0)
|
final int topBoundCollapsed = computePanelTopPosition(0);
|
|
// Determine the new slide offset based on the collapsed top position and the new required
|
// top position
|
return (mIsSlidingUp
|
? (float) (topBoundCollapsed - topPosition) / mSlideRange
|
: (float) (topPosition - topBoundCollapsed) / mSlideRange);
|
}
|
|
/**
|
* Returns the current state of the panel as an enum.
|
*
|
* @return the current panel state
|
*/
|
public PanelState getPanelState() {
|
return mSlideState;
|
}
|
|
/**
|
* Change panel state to the given state with
|
*
|
* @param state - new panel state
|
*/
|
public void setPanelState(PanelState state) {
|
|
// Abort any running animation, to allow state change
|
if(mDragHelper.getViewDragState() == ViewDragHelper.STATE_SETTLING){
|
LogUtil.debugLog(TAG, "View is settling. Aborting animation.");
|
mDragHelper.abort();
|
}
|
|
if (state == null || state == PanelState.DRAGGING) {
|
throw new IllegalArgumentException("Panel state cannot be null or DRAGGING.");
|
}
|
if (!isEnabled()
|
|| (!mFirstLayout && mSlideableView == null)
|
|| state == mSlideState
|
|| mSlideState == PanelState.DRAGGING) return;
|
|
if (mFirstLayout) {
|
setPanelStateInternal(state);
|
} else {
|
if (mSlideState == PanelState.HIDDEN) {
|
mSlideableView.setVisibility(View.VISIBLE);
|
requestLayout();
|
}
|
switch (state) {
|
case ANCHORED:
|
smoothSlideTo(mAnchorPoint, 0);
|
break;
|
case COLLAPSED:
|
smoothSlideTo(0, 0);
|
break;
|
case EXPANDED:
|
smoothSlideTo(1.0f, 0);
|
break;
|
case HIDDEN:
|
int newTop = computePanelTopPosition(0.0f) + (mIsSlidingUp ? +mPanelHeight : -mPanelHeight);
|
smoothSlideTo(computeSlideOffset(newTop), 0);
|
break;
|
}
|
}
|
}
|
|
private void setPanelStateInternal(PanelState state) {
|
if (mSlideState == state) return;
|
PanelState oldState = mSlideState;
|
mSlideState = state;
|
dispatchOnPanelStateChanged(this, oldState, state);
|
}
|
|
/**
|
* Update the parallax based on the current slide offset.
|
*/
|
@SuppressLint("NewApi")
|
private void applyParallaxForCurrentSlideOffset() {
|
if (mParallaxOffset > 0) {
|
int mainViewOffset = getCurrentParallaxOffset();
|
ViewCompat.setTranslationY(mMainView, mainViewOffset);
|
}
|
}
|
|
private void onPanelDragged(int newTop) {
|
if (mSlideState != PanelState.DRAGGING) {
|
mLastNotDraggingSlideState = mSlideState;
|
}
|
setPanelStateInternal(PanelState.DRAGGING);
|
// Recompute the slide offset based on the new top position
|
mSlideOffset = computeSlideOffset(newTop);
|
applyParallaxForCurrentSlideOffset();
|
// Dispatch the slide event
|
dispatchOnPanelSlide(mSlideableView);
|
// If the slide offset is negative, and overlay is not on, we need to increase the
|
// height of the main content
|
LayoutParams lp = (LayoutParams) mMainView.getLayoutParams();
|
int defaultHeight = getHeight() - getPaddingBottom() - getPaddingTop() - mPanelHeight;
|
|
if (mSlideOffset <= 0 && !mOverlayContent) {
|
// expand the main view
|
lp.height = mIsSlidingUp ? (newTop - getPaddingBottom()) : (getHeight() - getPaddingBottom() - mSlideableView.getMeasuredHeight() - newTop);
|
if (lp.height == defaultHeight) {
|
lp.height = LayoutParams.MATCH_PARENT;
|
}
|
mMainView.requestLayout();
|
} else if (lp.height != LayoutParams.MATCH_PARENT && !mOverlayContent) {
|
lp.height = LayoutParams.MATCH_PARENT;
|
mMainView.requestLayout();
|
}
|
}
|
|
@Override
|
protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
|
boolean result;
|
|
final int save = canvas.save();
|
if (mSlideableView != null && mSlideableView != child) { // if main view
|
// Clip against the slider; no sense drawing what will immediately be covered,
|
// Unless the panel is set to overlay content
|
canvas.getClipBounds(mTmpRect);
|
if (!mOverlayContent) {
|
if (mIsSlidingUp) {
|
mTmpRect.bottom = Math.min(mTmpRect.bottom, mSlideableView.getTop());
|
} else {
|
mTmpRect.top = Math.max(mTmpRect.top, mSlideableView.getBottom());
|
}
|
}
|
if (mClipPanel) {
|
canvas.clipRect(mTmpRect);
|
}
|
|
result = super.drawChild(canvas, child, drawingTime);
|
|
if (mCoveredFadeColor != 0 && mSlideOffset > 0) {
|
final int baseAlpha = (mCoveredFadeColor & 0xff000000) >>> 24;
|
final int imag = (int) (baseAlpha * mSlideOffset);
|
final int color = imag << 24 | (mCoveredFadeColor & 0xffffff);
|
mCoveredFadePaint.setColor(color);
|
canvas.drawRect(mTmpRect, mCoveredFadePaint);
|
}
|
} else {
|
result = super.drawChild(canvas, child, drawingTime);
|
}
|
|
canvas.restoreToCount(save);
|
|
return result;
|
}
|
|
/**
|
* Smoothly animate mDraggingPane to the target X position within its range.
|
*
|
* @param slideOffset position to animate to
|
* @param velocity initial velocity in case of fling, or 0.
|
*/
|
boolean smoothSlideTo(float slideOffset, int velocity) {
|
if (!isEnabled() || mSlideableView == null) {
|
// Nothing to do.
|
return false;
|
}
|
|
int panelTop = computePanelTopPosition(slideOffset);
|
|
if (mDragHelper.smoothSlideViewTo(mSlideableView, mSlideableView.getLeft(), panelTop)) {
|
setAllChildrenVisible();
|
ViewCompat.postInvalidateOnAnimation(this);
|
return true;
|
}
|
return false;
|
}
|
|
@Override
|
public void computeScroll() {
|
if (mDragHelper != null && mDragHelper.continueSettling(true)) {
|
if (!isEnabled()) {
|
mDragHelper.abort();
|
return;
|
}
|
|
ViewCompat.postInvalidateOnAnimation(this);
|
}
|
}
|
|
@Override
|
public void draw(Canvas c) {
|
super.draw(c);
|
|
// draw the shadow
|
if (mShadowDrawable != null && mSlideableView != null) {
|
final int right = mSlideableView.getRight();
|
final int top;
|
final int bottom;
|
if (mIsSlidingUp) {
|
top = mSlideableView.getTop() - mShadowHeight;
|
bottom = mSlideableView.getTop();
|
} else {
|
top = mSlideableView.getBottom();
|
bottom = mSlideableView.getBottom() + mShadowHeight;
|
}
|
final int left = mSlideableView.getLeft();
|
mShadowDrawable.setBounds(left, top, right, bottom);
|
mShadowDrawable.draw(c);
|
}
|
}
|
|
/**
|
* Tests scrollability within child views of v given a delta of dx.
|
*
|
* @param v View to test for horizontal scrollability
|
* @param checkV Whether the view v passed should itself be checked for scrollability (true),
|
* or just its children (false).
|
* @param dx Delta scrolled in pixels
|
* @param x X coordinate of the active touch point
|
* @param y Y coordinate of the active touch point
|
* @return true if child views of v can be scrolled by delta of dx.
|
*/
|
protected boolean canScroll(View v, boolean checkV, int dx, int x, int y) {
|
if (v instanceof ViewGroup) {
|
final ViewGroup group = (ViewGroup) v;
|
final int scrollX = v.getScrollX();
|
final int scrollY = v.getScrollY();
|
final int count = group.getChildCount();
|
// Count backwards - let topmost views consume scroll distance first.
|
for (int i = count - 1; i >= 0; i--) {
|
final View child = group.getChildAt(i);
|
if (x + scrollX >= child.getLeft() && x + scrollX < child.getRight() &&
|
y + scrollY >= child.getTop() && y + scrollY < child.getBottom() &&
|
canScroll(child, true, dx, x + scrollX - child.getLeft(),
|
y + scrollY - child.getTop())) {
|
return true;
|
}
|
}
|
}
|
return checkV && ViewCompat.canScrollHorizontally(v, -dx);
|
}
|
|
|
@Override
|
protected ViewGroup.LayoutParams generateDefaultLayoutParams() {
|
return new LayoutParams();
|
}
|
|
@Override
|
protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) {
|
return p instanceof MarginLayoutParams
|
? new LayoutParams((MarginLayoutParams) p)
|
: new LayoutParams(p);
|
}
|
|
@Override
|
protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
|
return p instanceof LayoutParams && super.checkLayoutParams(p);
|
}
|
|
@Override
|
public ViewGroup.LayoutParams generateLayoutParams(AttributeSet attrs) {
|
return new LayoutParams(getContext(), attrs);
|
}
|
|
@Override
|
public Parcelable onSaveInstanceState() {
|
Bundle bundle = new Bundle();
|
bundle.putParcelable("superState", super.onSaveInstanceState());
|
bundle.putSerializable(SLIDING_STATE, mSlideState != PanelState.DRAGGING ? mSlideState : mLastNotDraggingSlideState);
|
return bundle;
|
}
|
|
@Override
|
public void onRestoreInstanceState(Parcelable state) {
|
if (state instanceof Bundle) {
|
Bundle bundle = (Bundle) state;
|
mSlideState = (PanelState) bundle.getSerializable(SLIDING_STATE);
|
mSlideState = mSlideState == null ? DEFAULT_SLIDE_STATE : mSlideState;
|
state = bundle.getParcelable("superState");
|
}
|
super.onRestoreInstanceState(state);
|
}
|
|
private class DragHelperCallback extends ViewDragHelper.Callback {
|
|
@Override
|
public boolean tryCaptureView(View child, int pointerId) {
|
return !mIsUnableToDrag && child == mSlideableView;
|
|
}
|
|
@Override
|
public void onViewDragStateChanged(int state) {
|
if (mDragHelper != null && mDragHelper.getViewDragState() == ViewDragHelper.STATE_IDLE) {
|
mSlideOffset = computeSlideOffset(mSlideableView.getTop());
|
applyParallaxForCurrentSlideOffset();
|
|
if (mSlideOffset == 1) {
|
updateObscuredViewVisibility();
|
setPanelStateInternal(PanelState.EXPANDED);
|
} else if (mSlideOffset == 0) {
|
setPanelStateInternal(PanelState.COLLAPSED);
|
} else if (mSlideOffset < 0) {
|
setPanelStateInternal(PanelState.HIDDEN);
|
mSlideableView.setVisibility(View.INVISIBLE);
|
} else {
|
updateObscuredViewVisibility();
|
setPanelStateInternal(PanelState.ANCHORED);
|
}
|
}
|
}
|
|
@Override
|
public void onViewCaptured(View capturedChild, int activePointerId) {
|
setAllChildrenVisible();
|
}
|
|
@Override
|
public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) {
|
onPanelDragged(top);
|
invalidate();
|
}
|
|
@Override
|
public void onViewReleased(View releasedChild, float xvel, float yvel) {
|
int target = 0;
|
|
// direction is always positive if we are sliding in the expanded direction
|
float direction = mIsSlidingUp ? -yvel : yvel;
|
|
if (direction > 0 && mSlideOffset <= mAnchorPoint) {
|
// swipe up -> expand and stop at anchor point
|
target = computePanelTopPosition(mAnchorPoint);
|
} else if (direction > 0 && mSlideOffset > mAnchorPoint) {
|
// swipe up past anchor -> expand
|
target = computePanelTopPosition(1.0f);
|
} else if (direction < 0 && mSlideOffset >= mAnchorPoint) {
|
// swipe down -> collapse and stop at anchor point
|
target = computePanelTopPosition(mAnchorPoint);
|
} else if (direction < 0 && mSlideOffset < mAnchorPoint) {
|
// swipe down past anchor -> collapse
|
target = computePanelTopPosition(0.0f);
|
} else if (mSlideOffset >= (1.f + mAnchorPoint) / 2) {
|
// zero velocity, and far enough from anchor point => expand to the top
|
target = computePanelTopPosition(1.0f);
|
} else if (mSlideOffset >= mAnchorPoint / 2) {
|
// zero velocity, and close enough to anchor point => go to anchor
|
target = computePanelTopPosition(mAnchorPoint);
|
} else {
|
// settle at the bottom
|
target = computePanelTopPosition(0.0f);
|
}
|
|
if (mDragHelper != null) {
|
mDragHelper.settleCapturedViewAt(releasedChild.getLeft(), target);
|
}
|
invalidate();
|
}
|
|
@Override
|
public int getViewVerticalDragRange(View child) {
|
return mSlideRange;
|
}
|
|
@Override
|
public int clampViewPositionVertical(View child, int top, int dy) {
|
final int collapsedTop = computePanelTopPosition(0.f);
|
final int expandedTop = computePanelTopPosition(1.0f);
|
if (mIsSlidingUp) {
|
return Math.min(Math.max(top, expandedTop), collapsedTop);
|
} else {
|
return Math.min(Math.max(top, collapsedTop), expandedTop);
|
}
|
}
|
}
|
|
public static class LayoutParams extends MarginLayoutParams {
|
private static final int[] ATTRS = new int[]{
|
android.R.attr.layout_weight
|
};
|
|
public float weight = 0;
|
|
public LayoutParams() {
|
super(MATCH_PARENT, MATCH_PARENT);
|
}
|
|
public LayoutParams(int width, int height) {
|
super(width, height);
|
}
|
|
public LayoutParams(int width, int height, float weight) {
|
super(width, height);
|
this.weight = weight;
|
}
|
|
public LayoutParams(ViewGroup.LayoutParams source) {
|
super(source);
|
}
|
|
public LayoutParams(MarginLayoutParams source) {
|
super(source);
|
}
|
|
public LayoutParams(LayoutParams source) {
|
super(source);
|
}
|
|
public LayoutParams(Context c, AttributeSet attrs) {
|
super(c, attrs);
|
|
final TypedArray ta = c.obtainStyledAttributes(attrs, ATTRS);
|
if (ta != null) {
|
this.weight = ta.getFloat(0, 0);
|
ta.recycle();
|
}
|
|
|
}
|
}
|
}
|
