WPF Vault Addin - monitor DPI issue

mateusz_baczewski — Tue, 08 Apr 2025 06:56:01 GMT

Hi,

While developing an add-in for Vault, I encountered a scalability issue. The add-in has a WPF window. When the window is displayed on a monitor with DPI = 100%, everything works fine. However, if I move the window to a monitor with DPI > 100%, rendering issues occur—for example, with comboboxes. Has anyone experienced this problem before? Were you able to resolve it?

Re: WPF Vault Addin - monitor DPI issue

Markus.Koechl — Tue, 08 Apr 2025 08:05:11 GMT

You might need to apply the same setting that we recommend for VDS dialogs: Working with Vault with High DPI Settings

Re: WPF Vault Addin - monitor DPI issue

mateusz_baczewski — Tue, 08 Apr 2025 08:20:04 GMT

@Markus.Koechl

Thanks for the reply. Do you happen to know if there’s a way to achieve a similar effect programmatically? I would go with your solution for a single machine, but I’d need to implement this change company-wide.

Re: WPF Vault Addin - monitor DPI issue

mateusz_baczewski — Wed, 09 Apr 2025 08:43:58 GMT

Has anyone had a similar issue?

Re: WPF Vault Addin - monitor DPI issue

mateusz_baczewski — Tue, 15 Apr 2025 06:21:36 GMT

Hi,

I managed to solve this problem programmatically without the need to change any properties in the Vault startup file. The issue occurs when a WPF control, or part of it, has the property AllowsTransparency="True". In this case, you need to override the entire style of the control and change AllowsTransparency="False" wherever possible. In my case, the ComboBox's Popup had the property AllowsTransparency="True". After making these changes, the problem disappeared. I’m sending the style for the ComboBox that works.

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WPF Vault Addin - monitor DPI issue

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Re: WPF Vault Addin - monitor DPI issue

Re: WPF Vault Addin - monitor DPI issue

Re: WPF Vault Addin - monitor DPI issue