JavaFX | ContextMenu with examples

ContextMenu is a part of the JavaFX library. ContextMenu can be associated with controls such as labels, textfield etc. The context menu is activated on right clicking over the associated controls. It shows a popup containing several menuitems or sub menu.

The Constructors of the class are:

1. ContextMenu(): creates a new empty context menu.
2. ContextMenu(MenuItem… i): creates a context menu that contains the menuitems.

Commonly used methods:

Below programs illustrate the use of ContextMenu:

1. Program to create a context menu and add it to label: A ContextMenu will be created by name ‘contextMenu’ and 3 menuitems: menuItem1, menuItem2, menuItem3 will be added to the menu contextMenu and the menu contextMenu will be associated with a label ‘label’. The label will be created inside a scene, which in turn will be hosted inside a stage. The function setTitle() is used to provide title to the stage. Then a VBox is created, on which addChildren() method is called to attach the menubar inside the scene. Finally, the show() method is called to display the final results.
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   // Program to create a context menu and add it to label import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.*; import javafx.scene.layout.*; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.collections.*; import javafx.stage.Stage; import javafx.scene.text.Text.*; import javafx.scene.paint.*; import javafx.scene.text.*; public class contextMenu_1 extends Application {     // labels     Label l;        // launch the application     public void start(Stage stage)     {         // set title for the stage         stage.setTitle("creating contextMenu ");            // create a label         Label label1 = new Label("This is a ContextMenu example ");            // create a menu         ContextMenu contextMenu = new ContextMenu();            // create menuitems         MenuItem menuItem1 = new MenuItem("menu item 1");         MenuItem menuItem2 = new MenuItem("menu item 2");         MenuItem menuItem3 = new MenuItem("menu item 3");            // add menu items to menu         contextMenu.getItems().add(menuItem1);         contextMenu.getItems().add(menuItem2);         contextMenu.getItems().add(menuItem3);            // create a tilepane         TilePane tilePane = new TilePane(label1);            // setContextMenu to label         label1.setContextMenu(contextMenu);            // create a scene         Scene sc = new Scene(tilePane, 200, 200);            // set the scene         stage.setScene(sc);            stage.show();     }        public static void main(String args[])     {         // launch the application         launch(args);     } }

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   Output:
   

2. Program to create a context menu and add it to label and associate the context menu with window event listener: A Contextmenu will be created by name contextMenu and 3 menuitems menuItem1, menuItem2, menuItem3 will be added to the menu contextMenu and the contextMenu will be associated with a label l. The label will be created inside a scene, which in turn will be hosted inside a stage. The function setTitle() is used to provide title to the stage. Then a VBox is created, on which addChildren() method is called to attach the menubar inside the scene. Finally, the show() method is called to display the final results. A Window event will be created that will handle the window events of the context menu and will display the state of the context menu by a Label ‘label’. The window event will be associated with the label using setOnHiding() and setOnShowing() functions.
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   // Program to create a context menu and add it to label // and associate the context menu with window event listener import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.*; import javafx.scene.layout.*; import javafx.stage.WindowEvent; import javafx.event.EventHandler; import javafx.collections.*; import javafx.stage.Stage; import javafx.scene.text.Text.*; import javafx.scene.paint.*; import javafx.scene.text.*; public class contextMenu extends Application {     // labels     Label label;        // launch the application     public void start(Stage stage)     {         // set title for the stage         stage.setTitle("creating contextMenu ");            // create a label         Label label1 = new Label("This is a ContextMenu example ");            // create a menu         ContextMenu contextMenu = new ContextMenu();            // create menuitems         MenuItem menuItem1 = new MenuItem("menu item 1");         MenuItem menuItem2 = new MenuItem("menu item 2");         MenuItem menuItem3 = new MenuItem("menu item 3");            // add menu items to menu         contextMenu.getItems().add(menuItem1);         contextMenu.getItems().add(menuItem2);         contextMenu.getItems().add(menuItem3);            // label to display events         Label label = new Label("context menu hidden");            // create window event         EventHandler<WindowEvent> event = new EventHandler<WindowEvent>() {             public void handle(WindowEvent e)             {                 if (contextMenu.isShowing())                     label.setText("context menu showing");                 else                     label.setText("context menu hidden");             }         };            // add event         contextMenu.setOnShowing(event);         contextMenu.setOnHiding(event);            // create a tilepane         TilePane tilePane = new TilePane(label1);            tilePane.getChildren().add(label);            // setContextMenu to label         label.setContextMenu(contextMenu);            // create a scene         Scene sc = new Scene(tilePane, 200, 200);            // set the scene         stage.setScene(sc);            stage.show();     }        public static void main(String args[])     {         // launch the application         launch(args);     } }

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   Output:
   

   
   
   
   

   

Note : The above programs might not run in an online compiler please use an offline IDE.

Reference: https://docs.oracle.com/javase/8/javafx/api/javafx/scene/control/ContextMenu.html

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andrew1234

Third year Department of Information Technology Jadavpur University