private void EnsureOrCancelAnimator(View child)
{
if (translationAnimator == null)
{
translationAnimator = ViewCompat.Animate(child);
translationAnimator.SetDuration(300);
translationAnimator.SetInterpolator(InInterpolator);
}
else
{
translationAnimator.Cancel();
}
}
public override bool OnDependentViewChanged(CoordinatorLayout parent, Java.Lang.Object child, View dependency)
{
View _child = child as View;
if (_child.TranslationY > 0)
{
return(true);
}
if (animation != null)
{
animation.Cancel();
animation = null;
}
_child.TranslationY = Math.Min(0f, dependency.TranslationY - dependency.Height);
return(true);
}
//public override bool LayoutDependsOn(CoordinatorLayout parent, Java.Lang.Object child, View dependency)
//{
// var s = dependency is AppBarLayout;
// return base.LayoutDependsOn(parent, child, dependency);
//}
//public override bool OnDependentViewChanged(CoordinatorLayout parent, Java.Lang.Object child, View dependency)
//{
// //float scaleY = System.Math.Abs(dependency.GetY());
// //View _child = child as View;
// ////child.TranslationY
// //AnimateOffset(_child);
// return true;
// // return base.OnDependentViewChanged(parent, child, dependency);
//}
void AnimateOffset(View child, ScrollDirection scrollDirection)
{
if (translationAnimator == null)
{
translationAnimator = ViewCompat.Animate(child);
translationAnimator.SetDuration(300);
translationAnimator.SetInterpolator(InInterpolator);
}
else
{
translationAnimator.Cancel();
}
if (scrollDirection == ScrollDirection.Up)
{
translationAnimator.TranslationY(child.Height).Start();
}
else if (scrollDirection == ScrollDirection.Down)
{
translationAnimator.TranslationY(0).Start();
}
}
/**
* Manage animation for Android >= KITKAT
*
* @param child
*/
private void ensureOrCancelAnimator(T child, bool withAnimation)
{
if (translationAnimator == null)
{
translationAnimator = ViewCompat.Animate(child);
translationAnimator.SetDuration(withAnimation ? ANIM_DURATION : 0);
translationAnimator.SetUpdateListener(
new CustomViewPropertyAnimatorUpdateListener((view) =>
{
// Animate snackbar
if (snackbarLayout != null && snackbarLayout.LayoutParameters is ViewGroup.MarginLayoutParams)
{
targetOffset = view.MeasuredHeight - view.TranslationY;
ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams)snackbarLayout.LayoutParameters;
p.SetMargins(p.LeftMargin, p.TopMargin, p.RightMargin, (int)targetOffset);
snackbarLayout.RequestLayout();
}
// Animate Floating Action Button
if (floatingActionButton != null && floatingActionButton.LayoutParameters is ViewGroup.MarginLayoutParams)
{
ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams)floatingActionButton.LayoutParameters;
fabTargetOffset = fabDefaultBottomMargin - view.TranslationY + snackBarY;
p.SetMargins(p.LeftMargin, p.TopMargin, p.RightMargin, (int)fabTargetOffset);
floatingActionButton.RequestLayout();
}
// Pass navigation height to listener
if (navigationPositionListener != null)
{
navigationPositionListener.onPositionChange((int)(view.MeasuredHeight - view.TranslationY + snackBarY));
}
})
);
translationAnimator.SetInterpolator(INTERPOLATOR);
}
else
{
translationAnimator.SetDuration(withAnimation ? ANIM_DURATION : 0);
translationAnimator.Cancel();
}
}