How to center scaled vector graphic on Button?

问题

I want to draw scaled SVGPath nodes centered on button. Button should maintain its size independent of image size, and SVGPaths should retain their relative positions.

I am new to JavaFX so maybe I'm taking the wrong approach. Basically I'm trying to create button without text with overlayed SVG image.

Problem is that button image is displaced.

<Button prefWidth="30" prefHeight="30">
    <padding>
        <Insets top="0" right="0" bottom="0" left="0"/>
    </padding>
    <graphic>
        <Pane scaleX="0.3" scaleY="0.3">
            <SVGPath fill="BLACK" content="M92.032,33.384L69.047,55.835l5.465,31.662L46.057,72.576L17.634,87.557l5.398-31.673L0,33.481l31.791-4.654L45.98,0
l14.25,28.797L92.032,33.384z"/>
            <SVGPath fill="RED"
                     content="M65.681,48.339c0,10.776-8.804,19.512-19.665,19.512s-19.665-8.736-19.665-19.512
            s8.804-19.512,19.665-19.512S65.681,37.563,65.681,48.339z"/>
        </Pane>
    </graphic>
</Button>

回答1:

I found the solution. I think the key was this part of Group documentation:

"Any transform, effect, or state applied to a Group will be applied to all children of that group. Such transforms and effects will NOT be included in this Group's layout bounds, however if transforms and effects are set directly on children of this Group, those will be included in this Group's layout bounds."

<Group>
   <Pane scaleX="0.25" scaleY="0.25">
       <SVGPath fill="BLACK"
             content="M92.032,33.384L69.047,55.835l5.465,31.662L46.057,72.576L17.634,87.557l5.398-31.673L0,33.481l31.791-4.654L45.98,0
l14.25,28.797L92.032,33.384z"/>
       <SVGPath fill="RED"
             content="M65.681,48.339c0,10.776-8.804,19.512-19.665,19.512s-19.665-8.736-19.665-19.512
            s8.804-19.512,19.665-19.512S65.681,37.563,65.681,48.339z"/>
   </Pane>
</Group>

来源：https://stackoverflow.com/questions/29414611/how-to-center-scaled-vector-graphic-on-button