package com.gh4a.widget;
import android.content.Context;
import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.v4.view.ViewCompat;
import android.util.AttributeSet;
import android.view.View;
import com.gh4a.R;
@SuppressWarnings("unused")
public class ScrollAwareFloatingActionButtonBehavior extends FloatingActionButton.Behavior {
public ScrollAwareFloatingActionButtonBehavior(Context context, AttributeSet attrs) {
super();
}
@Override
public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout,
FloatingActionButton child, View directTargetChild, View target, int nestedScrollAxes) {
if (target.getTag(R.id.FloatingActionButtonScrollEnabled) == null) {
return super.onStartNestedScroll(coordinatorLayout, child,
directTargetChild, target, nestedScrollAxes);
}
return nestedScrollAxes == ViewCompat.SCROLL_AXIS_VERTICAL;
}
@Override
public void onNestedScroll(CoordinatorLayout coordinatorLayout, FloatingActionButton child,
View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed) {
super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, dxUnconsumed,
dyUnconsumed);
if (dyConsumed > 0 && child.getVisibility() == View.VISIBLE) {
child.hide();
} else if (dyConsumed < 0 && child.getVisibility() != View.VISIBLE) {
child.show();
}
}
}