Question

I am looking for a way to know when a user is scrolling the listbox on my Windows Phone 7 application up or down.

The closest I can come to is:

    private double fDown = 0.6;

    private void buddyList_ManipulationCompleted(object sender, ManipulationCompletedEventArgs e)
    {
        var sView = e.ManipulationContainer as ScrollViewer;

        double lBox = 25 - fDown;

        double nBox = 25 - sView.VerticalOffset;

        if (nBox > lBox)
            MessageBox.Show("up!");
        else
            MessageBox.Show("down!");
    }

However, that doesn’t work correctly. I need to know when it’s at the bottom of the listbox compared to scrolling through the middle of it.

When it’s at the bottom of the listbox I want to enable a timer to keep it at the bottom constantly. Or is there another way to keep it at the bottom constantly…? Is there anyway I can do this?

Thanks.

Answer 1

I talked to a friend and he gave me this as an answer (to anyone who looks in the futue):

        var sView = e.ManipulationContainer as ScrollViewer;

        double lBox = 25 - sView.ScrollableHeight;

        double nBox = 25 - sView.VerticalOffset;

        if (lBox < nBox)
            //Listbox Scrolled Up
        else
            //Listbox at Bottom

Thanks.