topic Re: how to customerize the scalebar? in ArcGIS API for Silverlight Questions

how to customerize the scalebar?

DanDong — Tue, 26 Oct 2010 16:40:19 GMT

Hi all,

I want to have a scalebar like this, but right now, I can't find a way to change the style of scalebar in silverlight API.

Basically, I need the scalebar has many values displaying on the top of the scalebar and I want the scalebar to change the units as zoomin or zoomout, say on the state level, it display the unit of miles, when it becomes the county level, it displays the unit of feet.

Any suggestions, thanks very much!

Re: how to customerize the scalebar?

DominiqueBroux — Sat, 11 Dec 2021 06:53:15 GMT

You could change the scalebar displayunit when the map extent changes.

Something like (to adapt from your map units and the expected scalebar units):

       void Map_ExtentChanged(object sender, ExtentEventArgs e)
        {
            ScaleBarUnit scaleBarUnit;

            double width = e.NewExtent.Width;
            if (width < 10)
                scaleBarUnit = ScaleBarUnit.Centimeters;
            else if (width > 100000)
                scaleBarUnit = ScaleBarUnit.Kilometers;
            else
                scaleBarUnit = ScaleBarUnit.Meters;

            myScaleBar.DisplayUnit = scaleBarUnit;
        }

and XAML

       <esri:Map x:Name="Map" ExtentChanged="Map_ExtentChanged">

Re: how to customerize the scalebar?

DanDong — Sat, 11 Dec 2021 06:53:18 GMT

You could change the scalebar displayunit when the map extent changes.

Something like (to adapt from your map units and the expected scalebar units):

       void Map_ExtentChanged(object sender, ExtentEventArgs e)
        {
            ScaleBarUnit scaleBarUnit;

            double width = e.NewExtent.Width;
            if (width < 10)
                scaleBarUnit = ScaleBarUnit.Centimeters;
            else if (width > 100000)
                scaleBarUnit = ScaleBarUnit.Kilometers;
            else
                scaleBarUnit = ScaleBarUnit.Meters;

            myScaleBar.DisplayUnit = scaleBarUnit;
        }

and XAML

       <esri:Map x:Name="Map" ExtentChanged="Map_ExtentChanged">

Thanks dbroux. I will try this method. btw: how can I change the outlook of the scalebar, just like the image I attached, with different values on the top of the scalebar.

Re: how to customerize the scalebar?

JenniferNery — Tue, 26 Oct 2010 23:03:52 GMT

Please look at this related thread: http://forums.arcgis.com/threads/15157-Access-ScaleBars-Current-Value Post #4, you can update this style.

Re: how to customerize the scalebar?

DanDong — Sat, 30 Oct 2010 00:20:14 GMT

Please look at this related thread: http://forums.arcgis.com/threads/15157-Access-ScaleBars-Current-Value Post #4, you can update this style.

Thank you Jennifer, that helps a lot. 🙂 Now I have a dynamic scalebar.