Scroolbar is shown as a black box in windows 11 theme

Question

The scrollbar in the SfRichtextboxAdv is shown as a black box with the windows 11 theme: Is that on purpose?Thanks, Elke

Kalaivannan Ganesan · Accepted Answer

Elke, please use the below code in the constructor of the
extension class, where the scrollbars of the SfRichTextBoxAdv control will be
preserved properly. We have also attached the modified sample application.

SfSkinManager.SetTheme(this, new Theme("Windows11Light"));
  SetResourceReference(StyleProperty,
  typeof(SfRichTextBoxAdv));

Please refer to the following UG link for more details.
https://help.syncfusion.com/wpf/themes/skin-manager#apply-themes-to-the-controls-derived-from-syncfusion-controls
Attachment: SfRichTextBoxAdv_Windows11Light_7fb01b34.zip

Kalaivannan Ganesan · Answer

Elke, from the provided image, we found that you are using
the SfRichTextBoxAdv with the Windows 11 Dark theme applied. The dark
theme uses darker colors, often with dark backgrounds. So, in the
SfRichTextBoxAdv, primary controls including the scroll bars will be in dark
color, but the thumb, which is used to scroll, will be white for a
user-friendly interface, as shown below:We have also attached a sample application where the Windows
11 light and dark themes can be applied to the SfRichTextBoxAdv control.Attachment: SfRichTextBoxAdv_Windows11_56d98676.zip

Elke Goellinger · Answer

Hi,

we are using the Windows 11 Light Theme and the thumb is only visible when the mouse hovers over the scrollbarisn't visible at all. We use the SfRichtextBoxExtension from one of our samples, because we need a text property.

I attached our sample code.

Thanks in advance!

Elke

Attachment: Test_1c866302.zip

Kalaivannan Ganesan · Answer

Elke, we can reproduce the reported issue with "Scrollbars
are shown as black in the continuous layout mode of the extension class with
Windows 11 light theme applied" We will validate this issue and update
you with further details within two working days, on or before January 17,
2024.

Elke Goellinger · Answer

Thanks! Now the scrollbar is shown correctly with the theme.

Kalaivannan Ganesan · Answer

Elke, Most Welcome