Le Tutoriel de JavaFX ContextMenu
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Vous ne pouvez pas attribuer tout l'espace de votre interface d'utilisateur pour une fonction nécessaire, vous pouvez utiliser un menu contextuel (Contextmenu). Un menu contextuel est une fenêtre pop-up qui apparait en réponse à un seul clic de souris. Un menu contextuel peut contenir un ou plusieur éléments de menu.
Il est à noter que le ContextMenu est tout à fait semblable à un Menu, vous pouvez ajouter des élements avec des types de Menultem, CheckMenultem, Radiomenultem et SeparatorMenultem.
L'exemple simple ci-dessous illustre un ContextMenu qui sera affiché lorsque les utilisateurs clic sur le bouton droit sur un cercle.
ContextMenuDemo.java
package org.o7planning.javafx.contextmenu;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.ContextMenu;
import javafx.scene.control.Label;
import javafx.scene.control.MenuItem;
import javafx.scene.input.ContextMenuEvent;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
public class ContextMenuDemo extends Application {
@Override
public void start(Stage stage) {
Label label = new Label();
Circle circle = new Circle();
circle.setRadius(80);
circle.setFill(Color.AQUA);
VBox root = new VBox();
root.setPadding(new Insets(5));
root.setSpacing(5);
root.getChildren().addAll(label, circle);
// Create ContextMenu
ContextMenu contextMenu = new ContextMenu();
MenuItem item1 = new MenuItem("Menu Item 1");
item1.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
label.setText("Select Menu Item 1");
}
});
MenuItem item2 = new MenuItem("Menu Item 2");
item2.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
label.setText("Select Menu Item 2");
}
});
// Add MenuItem to ContextMenu
contextMenu.getItems().addAll(item1, item2);
// When user right-click on Circle
circle.setOnContextMenuRequested(new EventHandler<ContextMenuEvent>() {
@Override
public void handle(ContextMenuEvent event) {
contextMenu.show(circle, event.getScreenX(), event.getScreenY());
}
});
Scene scene = new Scene(root, 400, 200);
stage.setTitle("JavaFX ContextMenu (o7planning.org)");
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
Application.launch(args);
}
}
Comme le Menu, vous povez ajouter des éléments de types de Munultem, CheckMenultem, RadioMenultem, Separatormenultem à ContextMenu. Vous pouvez également attacher les raccourcis (Accelerator) aux éléments, l'utilisateur peut appuyer des accourcis clavier au lieu de cliquer sur cet élément.
ContextMenuDemo2.java
package org.o7planning.javafx.contextmenu;
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.CheckMenuItem;
import javafx.scene.control.ContextMenu;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuItem;
import javafx.scene.control.RadioMenuItem;
import javafx.scene.control.SeparatorMenuItem;
import javafx.scene.control.ToggleGroup;
import javafx.scene.input.ContextMenuEvent;
import javafx.scene.input.KeyCombination;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
public class ContextMenuDemo2 extends Application {
@Override
public void start(Stage stage) {
Circle circle = new Circle();
circle.setRadius(80);
circle.setFill(Color.AQUA);
VBox root = new VBox();
root.setPadding(new Insets(5));
root.setSpacing(5);
root.getChildren().addAll(circle);
// Create ContextMenu
ContextMenu contextMenu = new ContextMenu();
MenuItem menuItem = new MenuItem("Menu Item");
// Set accelerator to menuItem.
menuItem.setAccelerator(KeyCombination.keyCombination("Ctrl+O"));
Menu parentMenu = new Menu("Parent");
MenuItem childMenuItem1 = new MenuItem("Child 1");
MenuItem childMenuItem2 = new MenuItem("Child 2");
parentMenu.getItems().addAll(childMenuItem1, childMenuItem2);
CheckMenuItem checkMenuItem = new CheckMenuItem("Check Menu Item");
checkMenuItem.setSelected(true);
SeparatorMenuItem separatorMenuItem = new SeparatorMenuItem();
RadioMenuItem radioMenuItem1 = new RadioMenuItem("Radio - Option 1");
RadioMenuItem radioMenuItem2 = new RadioMenuItem("Radio - Option 2");
ToggleGroup group = new ToggleGroup();
radioMenuItem1.setToggleGroup(group);
radioMenuItem2.setToggleGroup(group);
// Add MenuItem to ContextMenu
contextMenu.getItems().addAll(menuItem, parentMenu, checkMenuItem, //
separatorMenuItem, radioMenuItem1, radioMenuItem2);
// When user right-click on Circle
circle.setOnContextMenuRequested(new EventHandler<ContextMenuEvent>() {
@Override
public void handle(ContextMenuEvent event) {
contextMenu.show(circle, event.getScreenX(), event.getScreenY());
}
});
Scene scene = new Scene(root, 400, 200);
stage.setTitle("JavaFX ContextMenu (o7planning.org)");
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
Application.launch(args);
}
}
Certains événements de ContextMenu peuvent être utile pour vous. Par exemple, onShowing est un méthode pour gérér un vénement quit se produit avant que contextMenu commence à afficher. Vous povez profiter de cet événement pour faire quelque chose, par exemple en ajoutant des Menultem au ContextMenu.
// Called just prior to the ContextMenu being shown.
public final void setOnShowing(EventHandler<WindowEvent> value)
// Called just after the ContextMenu is shown.
public final void setOnShown(EventHandler<WindowEvent> value)
// Called just prior to the ContextMenu being hidden.
public final void setOnHiding(EventHandler<WindowEvent> value)
// Called just after the ContextMenu has been hidden.
public final void setOnHidden(EventHandler<WindowEvent> value)
// Called when there is an external request to close this
public final void setOnCloseRequest(EventHandler<WindowEvent> value)
ContextMenuEventDemo.java
package org.o7planning.javafx.contextmenu;
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.ContextMenu;
import javafx.scene.control.MenuItem;
import javafx.scene.control.TextArea;
import javafx.scene.input.ContextMenuEvent;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
import javafx.stage.WindowEvent;
public class ContextMenuEventDemo extends Application {
private int index = 1;
@Override
public void start(Stage stage) {
TextArea textArea = new TextArea();
textArea.setMinHeight(100);
Circle circle = new Circle();
circle.setRadius(80);
circle.setFill(Color.GRAY);
VBox root = new VBox();
root.setPadding(new Insets(5));
root.setSpacing(5);
root.getChildren().addAll(textArea, circle);
// Create ContextMenu
ContextMenu contextMenu = new ContextMenu();
MenuItem menuItem = new MenuItem("Menu Item");
contextMenu.getItems().add(menuItem);
// When user right-click on Circle
circle.setOnContextMenuRequested(new EventHandler<ContextMenuEvent>() {
@Override
public void handle(ContextMenuEvent event) {
contextMenu.show(circle, event.getScreenX(), event.getScreenY());
}
});
// Called just prior to the ContextMenu being shown.
// Add new MenuItem to ContextMenu.
contextMenu.setOnShowing(new EventHandler<WindowEvent>() {
@Override
public void handle(WindowEvent event) {
textArea.appendText("On Showing..\n");
MenuItem menuItem = new MenuItem("New Menu Item " + index++);
contextMenu.getItems().add(menuItem);
}
});
// Called just after the ContextMenu is shown.
contextMenu.setOnShown(new EventHandler<WindowEvent>() {
@Override
public void handle(WindowEvent event) {
textArea.appendText("On Show..\n");
}
});
// Called just prior to the ContextMenu being hidden.
contextMenu.setOnHiding(new EventHandler<WindowEvent>() {
@Override
public void handle(WindowEvent event) {
textArea.appendText("On Hiding..\n");
}
});
// Called just after the ContextMenu has been hidden.
contextMenu.setOnHidden(new EventHandler<WindowEvent>() {
@Override
public void handle(WindowEvent event) {
textArea.appendText("On Hidden..\n");
}
});
Scene scene = new Scene(root, 400, 250);
stage.setTitle("JavaFX ContextMenu (o7planning.org)");
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
Application.launch(args);
}
}
