Thank you for contacting us.
I was able to add a RadButtonElement
to the header of RadCollapsiblePanel
and to set its Shape
. In your case the image may be the one which is causing troubles. Since the RadCollapsiblePanel
actually uses a LightVisualElement
for its button, instead of RadButtonElement
. You can try to use CollapsiblePanelButtonElement
, which should result in the correct behavior.
I am also attaching a sample project for your reference.
Let me know if you have any other questions.