Die Anleitung zu JavaFX Menu

JavaFX Menu
Das Beispiel JavaFX Menu
CheckMenuItem, RadioMenuItem und SeparatorMenuItem
Das Event und der Akzelator vom MenuItem
JavaFX ContextMenu

1. JavaFX Menu

Es gibt die Class für Erstellung der Effekte für die Menu. Sehen Sie die unten Liste

MenuItem
CheckMenuItem
RadioMenuItem
SeparatorMenuItem

2. Das Beispiel JavaFX Menu

Unten ist ein einfaches Beispiel von der Erstellung eines MenuBar mit Menu undMenuItem.

MenuDemo.java

package org.o7planning.javafx.menu;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class MenuDemo extends Application {

    @Override
    public void start(Stage stage) {

        // Create MenuBar
        MenuBar menuBar = new MenuBar();
       
        // Create menus
        Menu fileMenu = new Menu("File");
        Menu editMenu = new Menu("Edit");
        Menu helpMenu = new Menu("Help");
       
        // Create MenuItems
        MenuItem newItem = new MenuItem("New");
        MenuItem openFileItem = new MenuItem("Open File");
        MenuItem exitItem = new MenuItem("Exit");
       
        MenuItem copyItem = new MenuItem("Copy");
        MenuItem pasteItem = new MenuItem("Paste");
       
        // Add menuItems to the Menus
        fileMenu.getItems().addAll(newItem, openFileItem, exitItem);
        editMenu.getItems().addAll(copyItem, pasteItem);
       
        // Add Menus to the MenuBar
        menuBar.getMenus().addAll(fileMenu, editMenu, helpMenu);
       
        BorderPane root = new BorderPane();
        root.setTop(menuBar);
        Scene scene = new Scene(root, 350, 200);
       
        stage.setTitle("JavaFX Menu (o7planning.org)");
        stage.setScene(scene);
        stage.show();
    }

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

}

3. CheckMenuItem, RadioMenuItem und SeparatorMenuItem

WIe Button können Sie die MenuItem mit Text und Image erstellen. In ein Menu gibt es MenuItem, CheckMenuItem, RadioMenuItem or durch SeparatorMenuItem um die Item zu teilen

MenuDemo2.java

package org.o7planning.javafx.menu;

import org.o7planning.javafx.utils.MyImageUtils;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.CheckMenuItem;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.control.RadioMenuItem;
import javafx.scene.control.SeparatorMenuItem;
import javafx.scene.control.ToggleGroup;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class MenuDemo2 extends Application {

    @Override
    public void start(Stage stage) {

        // Create MenuBar
        MenuBar menuBar = new MenuBar();

        // Create menus
        Menu fileMenu = new Menu("File");
        Menu editMenu = new Menu("Edit");
        Menu projectMenu = new Menu("Project");
        Menu helpMenu = new Menu("Help");

        // Create MenuItems
        MenuItem newItem = new MenuItem("New");
        Image newImage = MyImageUtils.getImage("/org/o7planning/javafx/icon/new-16.png");
        newItem.setGraphic(new ImageView(newImage));

        MenuItem openFileItem = new MenuItem("Open File");
        // SeparatorMenuItem.
        SeparatorMenuItem separator= new SeparatorMenuItem();
        MenuItem exitItem = new MenuItem("Exit");

        MenuItem copyItem = new MenuItem("Copy");
        MenuItem pasteItem = new MenuItem("Paste");
       
        // CheckMenuItem
        CheckMenuItem buildItem = new CheckMenuItem("Build Automatically");
        Image buildImage = MyImageUtils.getImage("/org/o7planning/javafx/icon/build-16.png");
        buildItem.setGraphic(new ImageView(buildImage));
        buildItem.setSelected(true);

        // RadioMenuItem
        RadioMenuItem updateItem1 = new RadioMenuItem("Auto Update");
        RadioMenuItem updateItem2 = new RadioMenuItem("Ask for Update");
       
        ToggleGroup group = new ToggleGroup();
        updateItem1.setToggleGroup(group);
        updateItem2.setToggleGroup(group);
        updateItem1.setSelected(true);
       
       
       
        // Add menuItems to the Menus
        fileMenu.getItems().addAll(newItem, openFileItem,separator, exitItem);
        editMenu.getItems().addAll(copyItem, pasteItem);
        projectMenu.getItems().add(buildItem);
        helpMenu.getItems().addAll(updateItem1,updateItem2);

        // Add Menus to the MenuBar
        menuBar.getMenus().addAll(fileMenu, editMenu, projectMenu, helpMenu);

        BorderPane root = new BorderPane();
        root.setTop(menuBar);
        Scene scene = new Scene(root, 350, 200);

        stage.setTitle("JavaFX Menu (o7planning.org)");
        stage.setScene(scene);
        stage.show();
    }

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

}

MyImageUtils.java

package org.o7planning.javafx.utils;

import java.io.InputStream;

import javafx.scene.image.Image;

public class MyImageUtils {

    // sourcePath: /org/o7planning/javafx/icon/java-16.png
    public static Image getImage(String sourcePath) {
        InputStream input = null;
        try {
            Class<?> c = MyImageUtils.class;
            input = c.getResourceAsStream(sourcePath);
            Image img = new Image(input);
            return img;
        } finally {
            closeQuietly(input);
        }

    }

    private static void closeQuietly(InputStream is) {
        try {
            if (is != null) {
                is.close();
            }
        } catch (Exception e) {

        }
    }
}

4. Das Event und der Akzelator vom MenuItem

Mit MenuItem können Sie die Ereignis beim Klicken behandeln und die Accelerator für MenuItem setzen. Beispiel: Accelerator Ctrl+X für MenuItem "Exit". D.h Der Benutzer kann Ctrl + X drücken anstatt sie die MenuItem "Exit" klicken beim Austritt der Applikation.

// Set Accelerator for Exit MenuItem.
exitItem.setAccelerator(KeyCombination.keyCombination("Ctrl+X"));

// When user click on the Exit item.
exitItem.setOnAction(new EventHandler<ActionEvent>() {

    @Override
    public void handle(ActionEvent event) {
        System.exit(0);
    }
});

Beispiel

MenuEventDemo.java

package org.o7planning.javafx.menu;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.input.KeyCombination;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class MenuEventDemo extends Application {

    @Override
    public void start(Stage stage) {

        // Create MenuBar
        MenuBar menuBar = new MenuBar();

        // Create menus
        Menu fileMenu = new Menu("File");
        Menu editMenu = new Menu("Edit");
        Menu helpMenu = new Menu("Help");

        // Create MenuItems
        MenuItem newItem = new MenuItem("New");
        MenuItem openFileItem = new MenuItem("Open File");
        MenuItem exitItem = new MenuItem("Exit");

        // Set Accelerator for Exit MenuItem.
        exitItem.setAccelerator(KeyCombination.keyCombination("Ctrl+X"));

        // When user click on the Exit item.
        exitItem.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent event) {
                System.exit(0);
            }
        });

        // Add menuItems to the Menus
        fileMenu.getItems().addAll(newItem, openFileItem, exitItem);

        // Add Menus to the MenuBar
        menuBar.getMenus().addAll(fileMenu, editMenu, helpMenu);

        BorderPane root = new BorderPane();
        root.setTop(menuBar);
        Scene scene = new Scene(root, 350, 200);

        stage.setTitle("JavaFX Menu (o7planning.org)");
        stage.setScene(scene);
        stage.show();
    }

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

}

5. JavaFX ContextMenu

Mehr sehen:

Die Anleitung zu JavaFX ContextMenu