Modality of Stage

javafx.stage.Modality defines the possible modality types for a Stage.

• APPLICATION_MODAL
  Defines a modal window that blocks events from being delivered to any other application window.
• NONE
  Defines a top-level window that is not modal.
• WINDOW_MODAL
  Defines a modal window that block events from being delivered to its entire owner window hierarchy.

Modify the code of last article "Dialog with CLOSE button", try difference Modality to check the effect.

package javafx_mydialog;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBoxBuilder;
import javafx.scene.text.Text;
import javafx.stage.Modality;
import javafx.stage.Stage;

/**
*
* @web http://java-buddy.blogspot.com/
*/
public class JavaFX_MyDialog extends Application {

  /**
   * @param args the command line arguments
   */
  public static void main(String[] args) {
      launch(args);
  }

  @Override
  public void start(Stage primaryStage) {
      primaryStage.setTitle("http://java-buddy.blogspot.com/");
      Button btn = new Button();
      btn.setText("Open Dialog");
      btn.setOnAction(new EventHandler<ActionEvent>() {

          @Override
          public void handle(ActionEvent event) {
              final Stage myDialog = new Stage();
              //myDialog.initModality(Modality.WINDOW_MODAL);
              //myDialog.initModality(Modality.NONE);
              myDialog.initModality(Modality.APPLICATION_MODAL);
            
              Button okButton = new Button("CLOSE");
              okButton.setOnAction(new EventHandler<ActionEvent>(){

                  @Override
                  public void handle(ActionEvent arg0) {
                      myDialog.close();
                  }
                
              });
            
              Scene myDialogScene = new Scene(VBoxBuilder.create()
                      .children(new Text("Hello! it's My Dialog."), okButton)
                      .alignment(Pos.CENTER)
                      .padding(new Insets(10))
                      .build());
            
              myDialog.setScene(myDialogScene);
              myDialog.show();
          }
      });
    
      StackPane root = new StackPane();
      root.getChildren().add(btn);
      primaryStage.setScene(new Scene(root, 300, 250));
      primaryStage.show();
  }
}