Example usage for javafx.scene Group addEventFilter

Introduction

In this page you can find the example usage for javafx.scene Group addEventFilter.

Prototype

public final <T extends Event> void addEventFilter(final EventType<T> eventType,
        final EventHandler<? super T> eventFilter) 

Source Link

Document

Registers an event filter to this node.

Usage

From source file:Main.java

private Node makeDraggable(final Node node) {
    final DragContext dragContext = new DragContext();
    final Group wrapGroup = new Group(node);

    wrapGroup.addEventFilter(MouseEvent.ANY, new EventHandler<MouseEvent>() {
        public void handle(final MouseEvent mouseEvent) {
            if (dragModeActiveProperty.get()) {
                // disable mouse events for all children
                mouseEvent.consume();//  w w  w .  j  ava2  s .  c o m
            }
        }
    });

    wrapGroup.addEventFilter(MouseEvent.MOUSE_PRESSED, new EventHandler<MouseEvent>() {
        public void handle(final MouseEvent mouseEvent) {
            if (dragModeActiveProperty.get()) {
                // remember initial mouse cursor coordinates
                // and node position
                dragContext.mouseAnchorX = mouseEvent.getX();
                dragContext.mouseAnchorY = mouseEvent.getY();
                dragContext.initialTranslateX = node.getTranslateX();
                dragContext.initialTranslateY = node.getTranslateY();
            }
        }
    });

    wrapGroup.addEventFilter(MouseEvent.MOUSE_DRAGGED, new EventHandler<MouseEvent>() {
        public void handle(final MouseEvent mouseEvent) {
            if (dragModeActiveProperty.get()) {
                // shift node from its initial position by delta
                // calculated from mouse cursor movement
                node.setTranslateX(
                        dragContext.initialTranslateX + mouseEvent.getX() - dragContext.mouseAnchorX);
                node.setTranslateY(
                        dragContext.initialTranslateY + mouseEvent.getY() - dragContext.mouseAnchorY);
            }
        }
    });

    return wrapGroup;
}

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