How to change the value of a color picker?

Hi *.

I am currently working on a small project and I would use the colorpicker. When I initialize the colorpicker, the widget is updated and displays the correct color, but when I try to change the value when running, nothing happens. I missed something?

Thank you very much
 
package javafx.tests.colorpicker;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ColorPicker;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

public class ColorPickerChangeColor extends Application {

     public static void main(String[] args) {
          Application.launch(args);
     }

     @Override
     public void start(Stage stage) throws Exception {

          VBox vbox = new VBox();
          vbox.setPadding(new Insets(10));
          vbox.setSpacing(10);
          Button button = new Button("Press me.");
          final ColorPicker colorpicker = new ColorPicker(Color.BLUE);

          button.setOnAction(new EventHandler<ActionEvent>() {
               @Override
               public void handle(ActionEvent arg0) {
                    colorpicker.setValue(Color.YELLOW);
                    System.out.println("Set color of the picker to yellow.");
               }
          });

          vbox.getChildren().add(colorpicker);
          vbox.getChildren().add(button);

          StackPane root = new StackPane();

          root.getChildren().add(vbox);
          stage.setTitle("ColorPicker");
          Scene scene = new Scene(root, 200, 200);

          stage.setScene(scene);
          stage.show();

     }
}
Published by: 963445 on January 3, 2013 12:23

Addition of

colorpicker.fireEvent(new ActionEvent());

After you set the color seems to be a workaround; Although I don't know how it works if the colorpicker popup is displayed.

Tags: Java

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