So, I have a control. It displays an image based some xml document and an optional parameter

• "Document" - XML document
• "RenderingOption" - optional image-rendering ( sharpen, soften )

So:

<XMLRenderingWidget Document="xxxxxx"/>

The above will render the document once

<XMLRenderingWidget Document="xxxxxx" RenderingOption="Sharpen"/>

The above will, sometimes render the document once, more oftentimes:

• Perform the rendering of the document as if no Rendering was set
• then, re-render the document with the Sharpen option

I do the rendering on the PropertyChangedCallback assigned to the property. How do I tell the control to "hey, before doing the rendering, apply the changes on the other properties being set, too"

Is this not possible? Should I bundle them up as one property instead?