private void AddScrollListener(ViewGroup vg, bool setForTop, bool setForBottom)
{
if ((!setForBottom && mTopOnScrollChangedListener == null ||
(setForBottom && mBottomOnScrollChangedListener == null)))
{
ViewTreeObserver.IOnScrollChangedListener onScrollChangedListener = new DelegateScrollChangeListener
{
ScrollChanged = () =>
{
bool hasButtons = false;
foreach (MDButton button in mButtons)
{
if (button != null && button.Visibility != ViewStates.Gone)
{
hasButtons = true;
break;
}
}
if (vg is WebView)
{
InvalidateDividersForWebView((WebView)vg, setForTop, setForBottom, hasButtons);
}
else
{
InvalidateDividersForScrollingView(vg, setForTop, setForBottom, hasButtons);
}
Invalidate();
}
};
if (!setForBottom)
{
mTopOnScrollChangedListener = onScrollChangedListener;
vg.ViewTreeObserver.AddOnScrollChangedListener(mTopOnScrollChangedListener);
}
else
{
mBottomOnScrollChangedListener = onScrollChangedListener;
vg.ViewTreeObserver.AddOnScrollChangedListener(mBottomOnScrollChangedListener);
}
onScrollChangedListener.OnScrollChanged();
}
}
private void AddScrollListener(ViewGroup vg, bool setForTop, bool setForBottom)
{
if ((!setForBottom && mTopOnScrollChangedListener == null
|| (setForBottom && mBottomOnScrollChangedListener == null)))
{
ViewTreeObserver.IOnScrollChangedListener onScrollChangedListener = new DelegateScrollChangeListener
{
ScrollChanged = () =>
{
bool hasButtons = false;
foreach (MDButton button in mButtons)
{
if (button != null && button.Visibility != ViewStates.Gone)
{
hasButtons = true;
break;
}
}
if (vg is WebView)
{
InvalidateDividersForWebView((WebView)vg, setForTop, setForBottom, hasButtons);
}
else
{
InvalidateDividersForScrollingView(vg, setForTop, setForBottom, hasButtons);
}
Invalidate();
}
};
if (!setForBottom)
{
mTopOnScrollChangedListener = onScrollChangedListener;
vg.ViewTreeObserver.AddOnScrollChangedListener(mTopOnScrollChangedListener);
}
else
{
mBottomOnScrollChangedListener = onScrollChangedListener;
vg.ViewTreeObserver.AddOnScrollChangedListener(mBottomOnScrollChangedListener);
}
onScrollChangedListener.OnScrollChanged();
}
}
