title: how to remove default graphic assigned to a control (like buttons and checkboxes) before setting new graphic to that control in java fx scene builder?
body: <p>i am making a java desktop application using javafx. For gui building i am using scene builder 2.0.
  Everything is just perfect as expected just 1 thing. I want to customize the buttons. i want to assign a custom graphic to a button.</p>
  
  <p>When i use [button.setgraphic(node)] , this statement set the new graphic to the button but default graphic of button also remains present as well. </p>
  
  <p>I just want to remove the default graphic and then want to assign the new (custom) garaphic to a control like buttons and radio buttons in javafx. 1 thing again i must tell that i am using scene  builder for building gui. </p>
  
  <p>How can i achieve this ?
  thanks in advance....</p>
  
  <p>Below is the screen-shot of current occuring situation, ..... </p>
  
  <p><img src="https://i.stack.imgur.com/Ydd8v.png" alt="enter image description here"> </p>
  
  <p>Here i have made a button using javafx scene builder , and then in the controller of the fxml file (.java file) i am trying to set the image (shown in orange box in snapshot) to that button by using setGraphics property of button ..... i just need that button to be of following shape ... </p>
  
  <p><img src="https://i.stack.imgur.com/0d56a.png" alt="enter image description here"></p>