JavaFX Tutorial - JavaFX FlowPane








The FlowPane layouts nodes in a row based on the available horizontal spacing and wraps nodes to the next line when horizontal space is less than the total of all the nodes' widths.

By default a FlowPane layout flows child nodes from left to right (Pos.TOP_LEFT).

To change the flow alignment, call the setAlignment() method by passing in an enumerated value of type Pos.

The following code creates a FlowPane layout to flow child nodes from right to left (Pos.TOP_RIGHT). 


FlowPane  flowPane  = new FlowPane(); 
flowPane.setAlignment(Pos.TOP_RIGHT); 
flowPane.getChildren().addAll(...); // child nodes  to add.




Example

Adding Buttons to flow pane 

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;
 /*from  w w  w  .ja va2  s .  c o m*/
public class Main extends Application {

    @Override
    public void start(Stage stage) {
        stage.setTitle("HTML");
        stage.setWidth(500);
        stage.setHeight(500);
        Scene scene = new Scene(new Group());
        
        FlowPane flow = new FlowPane();
        flow.setVgap(8);
        flow.setHgap(4);
        flow.setPrefWrapLength(300); // preferred width = 300
        for (int i = 0; i < 10; i++) {
            flow.getChildren().add(new Button("asdf"));
        }
        scene.setRoot(flow);
 
        stage.setScene(scene);
        stage.show();
    }
 
    public static void main(String[] args) {
        launch(args);
    }
}

The code above generates the following result.

null




Example 2

FlowPane preferred width allows for two columns 

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;
//from w w  w. j a  v  a 2 s.  c om
public class Main extends Application {
  public static void main(String[] args) {
    launch(args);
  }

  @Override
  public void start(Stage primaryStage) {
    primaryStage.setTitle("FlowPane example");

    FlowPane flowPane = new FlowPane();
    flowPane.setPadding(new Insets(10, 10, 10, 10));
    flowPane.setVgap(4);
    flowPane.setHgap(4);
    flowPane.setPrefWrapLength(210);

    Button btn = new Button();

    for (int i = 0; i < 8; i++) {

      btn = new Button("Button");
      btn.setPrefSize(100, 50);
      flowPane.getChildren().add(btn);

    }

    Scene scene = new Scene(flowPane);
    primaryStage.setScene(scene);
    primaryStage.show();
  }
}

The code above generates the following result.

null