Comments on: Silverlight Slider that snaps to rounded value when dragged

By: Hair Loss Blog

Hair Loss Blog — Wed, 15 Jun 2011 05:59:25 +0000

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By: dhuxin

dhuxin — Sat, 09 Apr 2011 13:20:00 +0000

public class RounderValueSlider:Slider
{

protected override void OnValueChanged(double oldValue, double newValue)
{
base.OnValueChanged(oldValue, newValue);
int val = Convert.ToInt32(Math.Round(newValue));
if (val != newValue) Value = val;
}
}
work fine!
and won’t break data binding

By: Nishant

Nishant — Thu, 14 Oct 2010 06:04:19 +0000

Well guys it seems to be good solution provided by Martin.

I guess for this given problem I tried something and it works perfect for me and i guess it fits perfect in Jordan’s case as well i.e. “Not Breaking any Data Binding”

Well steps are

1. Set “TickFrequency” property = 1
2. Set “isSnapToTickEnabled” property = true (Select check box in Blend)

I hope it must work perfect for you case too

Cheers!
Nishant

By: Thomas

Thomas — Fri, 14 May 2010 13:44:54 +0000

Hi,

First of all: nice work, this override works like a charm.
Although i have an issue, because of the override the ValueChanged event is not called anymore. How can I fix this?

Thanks in advance!

Thomas

By: Jordan

Jordan — Thu, 18 Jun 2009 11:11:08 +0000

I know!!! too busy!

By: Asheesh Soni

Asheesh Soni — Thu, 18 Jun 2009 10:59:52 +0000

Thanks.

Now where is the post on SL->JS->HTML graceful degradation?

By: Jordan

Jordan — Thu, 18 Jun 2009 07:55:43 +0000

Very nice

By: Asheesh Soni

Asheesh Soni — Thu, 18 Jun 2009 07:51:29 +0000

http://asheeshsoni.blogspot.com/2009/06/silverlight-slider-jump-value-by.html

By: Jordan

Jordan — Sat, 06 Jun 2009 01:21:13 +0000

Hey Martin,

Thanks for your input

Yes your method works, but doesn’t take a couple if things in to account:

Firstly by setting Slide.Value manually you’ll break any data binding on the Value property -> my designs are usually MVVM, so this isnt a great idea.

Second – if you put a Debug.WriteLine in your value changed handler, you’ll see a non rounded change, then a rounded change – i.e. this method is calling Value twice. (0.951156812339332 then 1)

Third – your method assumes you have access to code behind, which is usually only the case in UserControls, not so much in data templates or CustomControls

I normally really hate inhertiting off controls to do something so simple, but unfortunately I was stuck with the restrictions I listed here.

Once again thanks for sharing your thoughts!

By: Martin Hägerås

Martin Hägerås — Fri, 05 Jun 2009 09:27:31 +0000

I just did this in the ValueChanged handler:
////
void Slider3_ValueChanged(object sender, RoutedPropertyChangedEventArgs e)
{
Slider3.Value = Math.Round(e.NewValue);
}
////

Seems to work fine