JAVAFX - Adding Nodes To TitledPane's Header - layout

Question

I want to add nodes into the TitledPane's header. The only way I found to do it is using setGraphic() method.
The problem of using that way is I cannot place them neatly. Here is what I get:
The Codes
TitledPane tpane = new TitledPane();
tpane.setContent(new Text("Content"));
tpane.setExpanded(false);
Button b = new Button("Delete");
BorderPane box = new BorderPane();
box.setLeft(new Text("1 "));
box.setCenter(new Text("Single Pane"));
box.setRight(b);
AnchorPane par = new AnchorPane(box);
tpane.setGraphic(par);
VBox vbox = new VBox();
vbox.getChildren().add(tpane);
The Goal
I want to put the Delete button to the right, that's why I am using Borderpane. So the BorderPane need to fill the entire of the TitledPane's header width minus the space for small triangle
How can it be done inside setGraphic() method? Or are there any better way to achieve it?

Answer 1

To fix your problem try setting the width of the BorderPane to the width of the scene minus the arrow like this.
TitledPane tpane = new TitledPane();
tpane.setContent(new Text("Content"));
tpane.setExpanded(false);
Button b = new Button("Delete");
BorderPane box = new BorderPane();
box.setLeft(new Text("1 "));
box.setCenter(new Text("Single Pane"));
box.setRight(b);
AnchorPane par = new AnchorPane(box);
tpane.setGraphic(par);
VBox vbox = new VBox();
vbox.getChildren().add(tpane);
box.setPrefWidth(scene.getWidth()-30);//You can adjust the number to fit your needs and change scene to whatever the name of your scene is
I hope this helped

Answer 2

Well, it seems that support for javafx users is not as massive as the mainstream framework.
After some tries by the suggestion from #Austin, I found the way to do what I want, and this is also give dynamic sizing.
box.prefWidthProperty().bind(scene.widthProperty().subtract(35));
TitledPane tpane = new TitledPane();
tpane.setContent(new Text("Content"));
tpane.setExpanded(false);
Button b = new Button("Delete");
BorderPane box = new BorderPane();
box.setLeft(new Text("1 "));
box.setCenter(new Text("Single Pane"));
box.setRight(b);
tpane.setGraphic(box);
box.prefWidthProperty().bind(scene.widthProperty().subtract(35));
VBox vbox = new VBox();
vbox.getChildren().add(tpane);