make JavaFX Node Draggable - Java JavaFX

Java examples for JavaFX:Node

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Description

make JavaFX Node Draggable

Demo Code


import javafx.scene.Cursor;
import javafx.scene.Node;
import javafx.scene.input.MouseEvent;
import javafx.stage.Stage;

public class Main{
    public static void makeDraggable(final Stage stage, final Node byNode) {
    final Delta dragDelta = new Delta();
    byNode.setOnMousePressed((MouseEvent event) -> {
        dragDelta.x = stage.getX() - event.getSceneX();
        dragDelta.y = stage.getY() - event.getSceneY();
        byNode.setCursor(Cursor.MOVE);
    });// w  w  w .j  a va  2 s  .  c  om
    byNode.setOnMouseReleased((MouseEvent event) -> {
        byNode.setCursor(Cursor.HAND);
    });
    byNode.setOnMouseDragged((MouseEvent mouseEvent) -> {
        stage.setX(mouseEvent.getScreenX() + dragDelta.x);
        stage.setY(mouseEvent.getScreenY() + dragDelta.y);
    });
    byNode.setOnMouseEntered((MouseEvent mouseEvent) -> {
        if (!mouseEvent.isPrimaryButtonDown()) {
            byNode.setCursor(Cursor.HAND);
        }
    });
    byNode.setOnMouseExited((MouseEvent mouseEvent) -> {
        if (!mouseEvent.isPrimaryButtonDown()) {
            byNode.setCursor(Cursor.DEFAULT);
        }
    });
}
}

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