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AutoComplete and Locale Characters

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ComboBox

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answered on 29 Oct 2009, 01:15 PM

Hi Lars,

I am afraid that this time I will not be able to help. When RadComboBox is not editable (or is read-only) we cannot get the entered text from the TextBox and we rely on the KeyDown event to build a buffer with the typed keystrokes (because there is no TextInput event in Silverlight). Unfortunately, there is no reliable way to convert the PlatformKeyCode to its char representation for all cultures, hence the TextSearch does not work well with non english characters. Here is a forum thread about this problem:
http://forums.silverlight.net/forums/p/14567/48122.aspx

The scenario is not exactly the same, but we are affected by the same lack of functionality. Hopefuly in Silverlight 4 there will be a TextInput event and we will be able to fix this problem.

Regards,
Valeri Hristov
the Telerik team

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answered on 29 Oct 2009, 03:29 PM

Hi Lars,

I would not recommend changing the IsEditable from DropDownOpened/Closed events, since it might cause unexpected results. Here is how you can do it, though:
private void RadComboBox_DropDownOpened(object sender, EventArgs e)
{
Dispatcher.BeginInvoke(() => (sender as RadComboBox).IsEditable = true);
}
private void RadComboBox_DropDownClosed(object sender, EventArgs e)
{
Dispatcher.BeginInvoke(() => (sender as RadComboBox).IsEditable = false);
}

The problem is that when IsEditable is set, RadComboBox changes its control template, which disposes the dropdown Popup and the combo is automatically closed, because there is now a new Popup. The next click opens it, though.

All the best,
Valeri Hristov
the Telerik team

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answered on 29 Oct 2009, 04:48 PM

Hi Valeri,

It worked but it was not pretty. So I dropped the idea.

Autocomplete is not really useful without the danish characters - thinking about dropping it totally.

One last thought - is it possible to somehow customize the module responsible for getting keyboard characters.
Not a global solution but only to add 6 more characters to list.
- Working with Silverlight/keyboard is new to me. But I will be willing to spend some more time on this one !

Update:
Key = Unknown
PlaformKeyCode for "æ" = 192
PlaformKeyCode for "ø" = 222
PlaformKeyCode for "å" = 221

Please point me in the right direction - or tell me if you believe it's impossible :-)

/Lars

answered on 30 Oct 2009, 10:17 AM

Hi,

I did some Investigating on the subject, I was shocked to learn that silverlight don't have support for non-US keyboards !!
Lets hope for the best in SL4.
Also I wonder why Telerik don't have the support already.
See Link: http://michaelsync.net/2008/04/07/silverlight-2-beta1-international-non-us-textbox

The easy solution (for me) for the above is a custom Combobox with a change in the private method RadComboBoxKeyDown

to something like:

    
            char ch; 
        
            switch (e.PlatformKeyCode) 
        
            { 
        
               case 192: ch = 'Æ'; break; 
        
               case 222: ch = 'Ø'; break; 
        
               case 221: ch = 'Å'; break; 
        
               default: ch = Convert.ToChar(e.PlatformKeyCode); break; 
        
            } 
        
            this.AddTextInputString(ch);

/Lars