How to change header component in TitledPane in JavaFX

Question

I cannot find an answer about this anywhere on the internet.

I have an application that has to have collapsable panels, so the TitledPane and Accordion set-up in Jav

Answer 1

TitledPane is a Labeled, so you can set a graphic on it in a listener or a binding to the expanded property.

Changing background colors etc (including overriding styling of the :focused pseudo-class) is something that can be accomplished via css (refer to the TitledPane section of the caspian.css stylesheet in jfxrt.jar for examples).

If you need code based access to sub-components of the TitledPane, you can use the lookup function after the TitledPane has been added to a Scene shown on a Stage.

adminPane.lookup(".arrow").setVisible(false);

I'd advise trying the graphic/css stylesheet based approaches before trying a lookup.

If you don't need the Labeled to display text then set it display a graphic only.

titledPane.setContentDisplay(ContentDisplay.GRAPHIC_ONLY);

Here is some sample code which displays a TitledPane with a customized header next to a TitledPane without a customized header.

import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.geometry.Pos;
import javafx.scene.*;
import javafx.scene.control.*;
import javafx.scene.image.*;
import javafx.scene.layout.*;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

/** http://stackoverflow.com/questions/11765436/how-to-change-header-component-in-titledpane-in-javafx */
public class TitledPaneCustomization extends Application {
  public static void main(String[] args) { launch(args); }

  @Override public void start(Stage primaryStage) {
    TitledPane adminPane = new TitledPane("Administration", 
      VBoxBuilder.create().style("-fx-padding: 10").spacing(10).children(
        ButtonBuilder.create().text("Admin Client").maxWidth(Double.MAX_VALUE).build(),
        ButtonBuilder.create().text("Admin User").maxWidth(Double.MAX_VALUE).build()
      ).build()            
    );
    adminPane.setAnimated(false);
    adminPane.getStyleClass().add("admin");
    Node open   = HBoxBuilder.create().spacing(5).children(
      new Circle(4, 4, 8, Color.FORESTGREEN),
      new Rectangle(50, 16, Color.AQUAMARINE)
    ).build();
    Node closed = HBoxBuilder.create().spacing(5).children(
      new Circle(4, 4, 8, Color.GOLDENROD),
      new Rectangle(50, 16, Color.AQUAMARINE)
    ).build();

    adminPane.graphicProperty().bind(
      Bindings
        .when(adminPane.expandedProperty())
          .then(open)
          .otherwise(closed)
    );
    adminPane.setContentDisplay(ContentDisplay.GRAPHIC_ONLY);

    TitledPane viewPane = new TitledPane("View", 
      VBoxBuilder.create().style("-fx-padding: 10").spacing(10).children(
        ButtonBuilder.create().text("View Client").maxWidth(Double.MAX_VALUE).build(),
        ButtonBuilder.create().text("View User").maxWidth(Double.MAX_VALUE).build()
      ).build()            
    );
    viewPane.setAnimated(false);

    VBox errorPane = VBoxBuilder.create().style("-fx-padding: 10").spacing(10).children(
      new Label("500: Aug 8, 12:15pm"), 
      new Label("404: Aug 7, 3:27am")
    ).build();
    Label nErrors = new Label();
    nErrors.getStyleClass().add("nerrors");
    nErrors.textProperty().bind(Bindings.size(errorPane.getChildren()).asString());

    TitledPane connectivityPane = new TitledPane(
      "",      
      errorPane
    );
    Label connectivityErrorLabel = new Label("CONNECTIVITY ERROR");
    connectivityErrorLabel.getStyleClass().add("connectivityErrorLabel");
    connectivityPane.getStyleClass().add("connectivity");
    connectivityPane.setAnimated(false);
    connectivityPane.setGraphic(
      HBoxBuilder.create().spacing(2).alignment(Pos.CENTER).styleClass("header").children(
        nErrors,    
        new ImageView(
          new Image(
            "http://openiconlibrary.sourceforge.net/gallery2/open_icon_library-full/icons/png/48x48/actions/network-disconnect-2.png",
            0, 24, true, true
          )
        ),
        connectivityErrorLabel
      ).build()
    );

    HBox layout = new HBox(10);
    layout.setStyle("-fx-padding: 10; -fx-background-color: cornsilk;");
    layout.getChildren().addAll(adminPane, viewPane, connectivityPane);
    layout.setPrefHeight(150);
    layout.getStylesheets().add(this.getClass().getResource("titledpanecustomization.css").toExternalForm());
    primaryStage.setScene(new Scene(layout));
    primaryStage.show();

    Node arrow = adminPane.lookup(".arrow");
    arrow.setVisible(false);
    arrow.setManaged(false);

    // translate the titledpane arrow and header so that the arrow is displayed to right of the header.
    Pane connectivityArrow = (Pane) connectivityPane.lookup(".arrow");
    connectivityArrow.translateXProperty().bind(
      connectivityPane.widthProperty().subtract(connectivityArrow.widthProperty().multiply(2))
    );
    Pane connectivityTitle = (Pane) connectivityPane.lookup(".header");
    connectivityTitle.translateXProperty().bind(
      connectivityArrow.widthProperty().negate()
    );
  }
}

And some css to go with it:

/** titledpanecustomization.css place in same build directory as TitledPaneCustomization.java 
    and ensure build system copies it to the output classpath. */
.admin .titled-pane > .title {
  -fx-background-color: blue, yellow, linear-gradient(to bottom, derive(coral, +50%), coral);
}

.connectivity {
  -fx-text-fill: white;
}

.nerrors {
  -fx-background-color: derive(-fx-focus-color, -15%);
  -fx-padding: 5 8 5 8;
  -fx-text-fill: white;
}

.connectivityErrorLabel {
  -fx-text-fill: white;
  -fx-padding: 0 40 0 3; 
}

.connectivity .titled-pane > .title {
  -fx-background-color: -fx-box-border, -fx-inner-border, -fx-body-color;
  -fx-background-insets: 0, 1, 2;
  -fx-background-radius: 0 0 0 0, 0 0 0 0, 0 0 0 0;
  -fx-padding: 0.166667em 1.166667em 0.25em 0; /* 2 14 3 0 */
  -fx-color: -fx-focus-color;
}

.connectivity .titled-pane > .title > .arrow-button .arrow {
  -fx-background-color: white;
}

Answer 2

_{(Moved answer from question)}

This is the answer:

To remove the arrow, add this CSS declaration:

.titled-pane > .title > .arrow-button .arrow{
    -fx-shape: "";
}

The above CSS snippet will remove the arrow, but the space for the arrow is still occupied. This was really tricky and I couldn't find it documented anywhere on the internet, but I applied this CSS statement and it removed the gap from the arrow.

.titled-pane > .title{
   -fx-padding: 0 0 0 -4;
}

This may not be the best solution, but it is a solution that has worked for my needs.

Answer 3

This is how you remove the arrow:

.titled-pane > .title > .arrow-button > .arrow{
    -fx-shape: null;
}

Answer 4

In the present day at the end of 2018 nothing of these solutions works with JavaFX of JDK 1.8. So I've working on a simple solution. You can copy this method in and utility class:

public static boolean hideArrow(TitledPane pane) {
    Node arrowButton = pane.lookup(".arrow-button");
    if (arrowButton == null) {
        return false;
    }
    // I don't know how with this the arrow space disappears...., but it does
    arrowButton.setStyle("-fx-background-color: black;");
    Parent titleRegion = arrowButton.getParent();
    titleRegion.addEventFilter(MouseEvent.ANY, MouseEvent::consume);
    titleRegion.setCursor(Cursor.DEFAULT);
    ((StackPane) titleRegion).getChildren().remove(arrowButton);
    return true;
}