Open a new Window in JavaFX

Window in JavaFX
Example, Open a Modeless Window
Example, Open a Modal Window

1. Window in JavaFX

In JavaFX, to create awindow, you use Stage class.

There are three modelities that you can apply to the Stage through the stage.initModality(Modelity) method.

Modelity.NONE
Modelity.WINDOW_MODAL
Modelity.APPLICATION_MODAL

When creating a new Stage, you can set up a parent window for it (also called the window owning it), via the stage.initOwner(parentStage) method.

No	Modelity	Description
1	Modelity.NONE	When you open a new window with this modelity, the new window will be independent from the parent window. You can interact with the parent window, or close it without affecting the new window.
2	Modelity.WINDOW_MODAL	When you open a new window with this modelity, it will lock the parent window. You can not interact with the parent window until this window is closed.
3	Modelity.APPLICATION_MODAL	When you open a new window with this modelity, it will lock any other windows of the application. You can not interact with any other windows until this window is closed.

2. Example, Open a Modeless Window

For example, when you press a Button on the window 1, it will open the second window with the default modelity (Modeless Window / Modelity.NONE).

OpenNewModelessWindowExample.java

package org.o7planning.javafx.window;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class OpenNewModelessWindowExample extends Application {

	@Override
	public void start(final Stage primaryStage) {

		Button button = new Button();
		button.setText("Open a New Window");

		button.setOnAction(new EventHandler<ActionEvent>() {

			@Override
			public void handle(ActionEvent event) {

				Label secondLabel = new Label("I'm a Label on new Window");

				StackPane secondaryLayout = new StackPane();
				secondaryLayout.getChildren().add(secondLabel);

				Scene secondScene = new Scene(secondaryLayout, 230, 100);

				// New window (Stage)
				Stage newWindow = new Stage();
				newWindow.setTitle("Second Stage");
				newWindow.setScene(secondScene);

				// Set position of second window, related to primary window.
				newWindow.setX(primaryStage.getX() + 200);
				newWindow.setY(primaryStage.getY() + 100);

				newWindow.show();
			}
		});

		StackPane root = new StackPane();
		root.getChildren().add(button);

		Scene scene = new Scene(root, 450, 250);

		primaryStage.setTitle("JavaFX Open a new Window (o7planning.org)");
		primaryStage.setScene(scene);
		primaryStage.show();
	}

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

}

3. Example, Open a Modal Window

For example, when you press a Button on the window 1, it will open a new window with the Modal Window modelity (Modelity.WINDOW_MODAL) . When the new window still displays you can not interact with the father window.

OpenNewModelWindowExample.java

package org.o7planning.javafx.window;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.StackPane;
import javafx.stage.Modality;
import javafx.stage.Stage;

public class OpenNewModelWindowExample extends Application {

   @Override
   public void start(final Stage primaryStage) {

      Button button = new Button();
      button.setText("Open a New Window");

      button.setOnAction(new EventHandler<ActionEvent>() {

         @Override
         public void handle(ActionEvent event) {

            Label secondLabel = new Label("I'm a Label on new Window");

            StackPane secondaryLayout = new StackPane();
            secondaryLayout.getChildren().add(secondLabel);

            Scene secondScene = new Scene(secondaryLayout, 230, 100);

            // New window (Stage)
            Stage newWindow = new Stage();
            newWindow.setTitle("Second Stage");
            newWindow.setScene(secondScene);

            // Specifies the modality for new window.
            newWindow.initModality(Modality.WINDOW_MODAL);

            // Specifies the owner Window (parent) for new window
            newWindow.initOwner(primaryStage);

            // Set position of second window, related to primary window.
            newWindow.setX(primaryStage.getX() + 200);
            newWindow.setY(primaryStage.getY() + 100);

            newWindow.show();
         }
      });

      StackPane root = new StackPane();
      root.getChildren().add(button);

      Scene scene = new Scene(root, 450, 250);

      primaryStage.setTitle("JavaFX Open a new Window (o7planning.org)");
      primaryStage.setScene(scene);
      primaryStage.show();
   }

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

}

Open a new Window in JavaFX

1. Window in JavaFX

2. Example, Open a Modeless Window

3. Example, Open a Modal Window

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