How to reach javafx mouse click and hold event?

Question

I am developing a JavaFX project, and I need something similar to TouchEventwhich the push and hold event characterizes. But it should be displayed as MouseEventbecause I have problems with touch events in Linux. For example, in Ubuntu it does not respond to touch events.

Please let me know if you have any ideas on how to start MouseEventwhenever "click and hold" occurs on Linux?

Answer 1

Just use it PauseTransitionas a timer to hold it. Run it if the mouse is pressed, stop it if it is released or dragged.

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);
    }
}

Answer 2

on my project, it also worked like a charm !!! ..