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Popup Box visibility issue

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ComboBox
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Alan
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Alan asked on 15 Oct 2013, 05:17 PM
Hi I'm having a strange issue with the RadComboBox popup menu not appearing. The project is designing a number of WPF applications to be used for a utility company's control center. They're using a Barco application to screen scrape the images from the image buffer and push them to the video wall controller. We had a similar problem where the application was not being detected by the Barco application and could not be pushed to the video wall. We found that if we set the <Window> element 'AllowsTransparency' property to false in the MainWindow.xaml  that the Barco would properly display the application.

The newest problem to occur is that the RadComboBox popup box isn't detected by the Barco while everything else on the application is. We're using the RadComboBox within a custom user control, so there is no 'AllowTransparency' property available. 

Is there some setting available on the RadComboBox that might be causing this issue? This problem is very unique and luckily we stumbled upon the 'AllowsTransparency' property originally. 

Thanks

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Vladi
Telerik team
answered on 18 Oct 2013, 11:04 AM
Hi,

We are not aware of such issue in that current version of RadComboBox. The control hasn't been tested with the mentioned Barco application and there could be issues with that integration. You could set the AllowsTransparency directly to the Popup of the RadComboBox by adding a Style with TargetType="Popup" and set the property to the desired value. The next code snippet shows how to declare the described style in the App.xaml of your project:
<Style TargetType="Popup">
    <Setter Property="AllowsTransparency" Value="True"/>
</Style>

Hope this is helpful.

Regards,
Vladi
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Alan
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answered on 21 Oct 2013, 08:42 PM
Thank you, we tried a number of other WPF controls and the problem still occurs. This is clearly an issue with Barco.

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Vladi
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Alan
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