c# - Border.IsMouseOver in RichTextBox ( InlineUIContainer in RichTextBox does not respond to event/trigger ) -

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say have following:

<grid>      <grid.resources>          <style targettype="{x:type border}">             <style.triggers>                 <trigger property="border.ismouseover" value="true">                     <setter property="background" value="black" />                     <setter property="borderbrush" value="red" />                     <setter property="borderthickness" value="2" />                     <setter property="cornerradius" value="7,2,10,2" />                 </trigger>                 <trigger property="border.ismouseover" value="false">                     <setter property="background" value="black" />                     <setter property="borderbrush" value="royalblue" />                     <setter property="borderthickness" value="2" />                     <setter property="cornerradius" value="7,2,10,2" />                 </trigger>             </style.triggers>          </style>          <style targettype="{x:type textblock}">             <setter property="margin" value="7,0,7,1" />             <setter property="fontsize" value="12" />             <setter property="foreground" value="white" />         </style>          <style targettype="{x:type run}">             <setter property="fontsize" value="12" />         </style>      </grid.resources>          <flowdocument >              <paragraph>                  <span>                      <border>                          <textblock>test</textblock>                      </border>                  </span>              </paragraph>          </flowdocument>      </richtextbox>  </grid>

the style triggers work beautifully when border outside of richtextbox, not when inside inlineuicontainer in richtextbox.

i able desired behavior setting properties in code behind use of mouseover event , using visualtreehelper.hittest() method, i'm pretty sure terribly inefficient , can't think there better way approach this?

if offer guidance here, appreciated.

i had search deepest , darkest corners of internet find one, looks there hack enable events inlineuielements within flowdocument:

public class eventenabledflowdocument : flowdocument {     protected override bool isenabledcore     {                 {             return true;         }     } }

note there nasty side effects doing this, seems work purposes. 1 side effect aware of - event handlers not saved if delete inlineuielement , undo deletion.


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