如何实现javafx鼠标事件的“按下并按住”？

如何实现javafx鼠标事件的“按下并按住”？

只需将a

PauseTransition

用作“保持”的计时器即可。如果按下鼠标，则将其启动；如果释放或拖动，则将其停止。

import javafx.animation.PauseTransition;import javafx.application.Application;import javafx.event.EventHandler;import javafx.scene.Node;import javafx.scene.Scene;import javafx.scene.input.MouseEvent;import javafx.scene.layout.Pane;import javafx.stage.Stage;import javafx.util.Duration;public class MousePressAndHoldTest extends Application {    @Override    public void start(Stage primaryStage) {        Pane root = new Pane();        addPressAndHoldHandler(root, Duration.seconds(1),      event -> System.out.println("Press and hold"));        primaryStage.setScene(new Scene(root, 400, 400));        primaryStage.show();    }    private void addPressAndHoldHandler(Node node, Duration holdTime,  EventHandler<MouseEvent> handler) {        class Wrapper<T> { T content ; }        Wrapper<MouseEvent> eventWrapper = new Wrapper<>();        PauseTransition holdTimer = new PauseTransition(holdTime);        holdTimer.setonFinished(event -> handler.handle(eventWrapper.content));        node.addEventHandler(MouseEvent.MOUSE_PRESSED, event -> { eventWrapper.content = event ; holdTimer.playFromStart();        });        node.addEventHandler(MouseEvent.MOUSE_RELEASED, event -> holdTimer.stop());        node.addEventHandler(MouseEvent.DRAG_DETECTED, event -> holdTimer.stop());    }    public static void main(String[] args) {        launch(args);    }}