package com.lqr.materialdesigndemo.behavior;

import android.content.Context;
import android.support.design.widget.CoordinatorLayout;
import android.support.v4.view.ViewCompat;
import android.support.v4.widget.NestedScrollView;
import android.util.AttributeSet;
import android.view.View;

public class CustomerBehavior2 extends CoordinatorLayout.Behavior<View> {

    public CustomerBehavior2(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    /**
     * 开始滚动前
     */
    @Override
    public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, View child, View target, int dx, int dy, int[] consumed) {
        int scrollY = target.getScrollY();
        child.setScrollY(scrollY);
        super.onNestedPreScroll(coordinatorLayout, child, target, dx, dy, consumed);
    }

    /**
     * 开始滚动时
     */
    @Override
    public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, View child, View directTargetChild, View target, int nestedScrollAxes) {
        // 监听竖直滚动
        return nestedScrollAxes == ViewCompat.SCROLL_AXIS_VERTICAL || super.onStartNestedScroll(coordinatorLayout, child, directTargetChild, target, nestedScrollAxes);
    }

    /**
     * 开始滚动后
     */
    @Override
    public void onNestedScroll(CoordinatorLayout coordinatorLayout, View child, View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed) {
        super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed);
    }

    /**
     * 松开手指后惯性滑动之前
     */
    @Override
    public boolean onNestedPreFling(CoordinatorLayout coordinatorLayout, View child, View target, float velocityX, float velocityY) {
        return super.onNestedPreFling(coordinatorLayout, child, target, velocityX, velocityY);
    }

    /**
     * 松开手指后惯性滑动时
     */
    @Override
    public boolean onNestedFling(CoordinatorLayout coordinatorLayout, View child, View target, float velocityX, float velocityY, boolean consumed) {
        ((NestedScrollView) child).fling((int) velocityY);
        return super.onNestedFling(coordinatorLayout, child, target, velocityX, velocityY, consumed);
    }

    int count = 1;

    /**
     * 滚动结束
     */
    @Override
    public void onStopNestedScroll(CoordinatorLayout coordinatorLayout, View child, View target) {
        child.animate().rotation(count++ * 360);
        super.onStopNestedScroll(coordinatorLayout, child, target);
    }
}