Java Community | Help. Code. Learn.•3y ago

Is this the best I can get to making a node draggable?

basically I've been trying to figure out how to properly make nodes draggable. Usually I always just add an offset so that the node appears to be dragged by where the mouse clicked but it's just the center of the node. I wanted to try and see If I could do it but that code that I used hasn't been that reliable either. Is there a better approach here?

7 Replies

JavaBot•3y ago

Hey, @Kar.Jar! Please remember to /close this post once your question has been answered!

CarterOP•3y ago

public class Draggable {

    private double xPosition;
    private double yPosition;

    public void makeDraggable(Node n) {

        n.setOnMousePressed(event -> {
            xPosition = event.getSceneX();
            yPosition = event.getSceneY();

        });

        n.setOnMouseDragged(event -> {

            n.setLayoutX(event.getSceneX() - xPosition);
            n.setLayoutY(event.getSceneY() - yPosition);

        });

    }


}

public class Draggable {

    private double xPosition;
    private double yPosition;

    public void makeDraggable(Node n) {

        n.setOnMousePressed(event -> {
            xPosition = event.getSceneX();
            yPosition = event.getSceneY();

        });

        n.setOnMouseDragged(event -> {

            n.setLayoutX(event.getSceneX() - xPosition);
            n.setLayoutY(event.getSceneY() - yPosition);

        });

    }


}

here is the code that sets a not to be draggable and here is the result

CarterOP•3y ago

as you can see the motion kind of jerks around

CarterOP•3y ago

Overall it's not too bad I just want to know if there is an easy fix for this or not.

Unknown User•3y ago

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CarterOP•3y ago

yeah it should be readable enough I'm pretty much doing the same thing

Unknown User•3y ago

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Is this the best I can get to making a node draggable?