java.awt.event.MouseWheelEvent#getID()源码实例Demo

@EventHandler
public void onMapZoom(MouseWheelEvent event) {
    if (event.getID() == MouseEvent.MOUSE_WHEEL) {
        if (getMapBounds().contains(event.getPoint()) && visible) {
            event.consume();
            int scroll = event.getWheelRotation();
            zoom += scroll * ZOOM_UNIT;
            if (scroll > 0) {
                zoom = Math.min(zoom, ZOOM_MAX);
            } else {
                zoom = Math.max(zoom, ZOOM_MIN);
            }
            if (zoom != lastZoom) {
                double dz = zoom - lastZoom;
                offset.x -= (dz * getMapWidth()) / 2;
                offset.y -= (dz * getMapHeight()) / 2;
            }
            lastZoom = zoom;
            refresh();
        }
    }
}
 

private MouseWheelEvent translateEvent(MouseWheelEvent e)
{
	Dimension stretchedDimensions = client.getStretchedDimensions();
	Dimension realDimensions = client.getRealDimensions();

	int newX = (int) (e.getX() / (stretchedDimensions.width / realDimensions.getWidth()));
	int newY = (int) (e.getY() / (stretchedDimensions.height / realDimensions.getHeight()));

	return new MouseWheelEvent((Component) e.getSource(), e.getID(), e.getWhen(), e.getModifiers(), newX, newY,
		e.getClickCount(), e.isPopupTrigger(), e.getScrollType(), e.getScrollAmount(), e.getWheelRotation());
}
 

private MouseWheelEvent createMouseWheelEvent(final MouseWheelEvent mouseWheelEvent, final Point point,
                                              final Component target) {
    return new MouseWheelEvent(target,
                               mouseWheelEvent.getID(),
                               mouseWheelEvent.getWhen(),
                               mouseWheelEvent.getModifiersEx(),
                               point.x,
                               point.y,
                               mouseWheelEvent.getClickCount(),
                               mouseWheelEvent.isPopupTrigger(),
                               mouseWheelEvent.getScrollType(),
                               mouseWheelEvent.getScrollAmount(),
                               mouseWheelEvent.getWheelRotation());
}
 

/**
 * Clones a {@link MouseEvent}.
 *
 * @param event The event to clone.
 * @return The new {@link MouseEvent}.
 */
public static final MouseEvent cloneMouseEvent(MouseEvent event) {
    if (event instanceof MouseWheelEvent) {
        MouseWheelEvent old = (MouseWheelEvent) event;
        return new MouseWheelEvent((Component) old.getSource(), old.getID(), System.currentTimeMillis(), old.getModifiersEx(), old.getX(), old.getY(), old.getClickCount(), old.isPopupTrigger(), old.getScrollType(), old.getScrollAmount(), old.getWheelRotation());
    }
    return new MouseEvent((Component) event.getSource(), event.getID(), System.currentTimeMillis(), event.getModifiersEx(), event.getX(), event.getY(), event.getClickCount(), event.isPopupTrigger());
}
 

/**
 * Clones a {@link MouseEvent}.
 *
 * @param event       The event to clone.
 * @param refreshTime Pass in {@code true} to generate a new time stamp.
 * @return The new {@link MouseEvent}.
 */
public static final MouseEvent cloneMouseEvent(MouseEvent event, boolean refreshTime) {
    if (event instanceof MouseWheelEvent) {
        MouseWheelEvent old = (MouseWheelEvent) event;
        return new MouseWheelEvent((Component) old.getSource(), old.getID(), refreshTime ? System.currentTimeMillis() : event.getWhen(), old.getModifiersEx(), old.getX(), old.getY(), old.getClickCount(), old.isPopupTrigger(), old.getScrollType(), old.getScrollAmount(), old.getWheelRotation());
    }
    return new MouseEvent((Component) event.getSource(), event.getID(), refreshTime ? System.currentTimeMillis() : event.getWhen(), event.getModifiersEx(), event.getX(), event.getY(), event.getClickCount(), event.isPopupTrigger());
}
 

private MouseWheelEvent translateEvent(MouseWheelEvent e)
{
	Dimension stretchedDimensions = client.getStretchedDimensions();
	Dimension realDimensions = client.getRealDimensions();

	int newX = (int) (e.getX() / (stretchedDimensions.width / realDimensions.getWidth()));
	int newY = (int) (e.getY() / (stretchedDimensions.height / realDimensions.getHeight()));

	return new MouseWheelEvent((Component) e.getSource(), e.getID(), e.getWhen(), e.getModifiers(), newX, newY,
			e.getClickCount(), e.isPopupTrigger(), e.getScrollType(), e.getScrollAmount(), e.getWheelRotation());
}
 

@Override
protected void processMouseWheelEvent(MouseWheelEvent e) {
    MouseWheelEvent ee = new MouseWheelEvent(
            (Component) e.getSource(), e.getID(), e.getWhen(),
            e.getModifiers(), e.getX(), e.getY(), e.getXOnScreen(),
            e.getYOnScreen(), e.getClickCount(),
            e.isPopupTrigger(), e.getScrollType(), e.getScrollAmount(),
            e.getWheelRotation(), e.getPreciseWheelRotation());
    super.processMouseWheelEvent(ee);
}
 

private MouseWheelEvent cloneEvent(MouseWheelEvent e) {
	return new MouseWheelEvent(getParentScrollPane(), e.getID(), e.getWhen(), e.getModifiers(), 1, 1,
			e.getClickCount(), false, e.getScrollType(), e.getScrollAmount(), e.getWheelRotation());
}
 

private MouseWheelEvent cloneEvent(MouseWheelEvent e) {
	return new MouseWheelEvent(getParentScrollPane(), e.getID(), e
			.getWhen(), e.getModifiers(), 1, 1, e
			.getClickCount(), false, e.getScrollType(), e
			.getScrollAmount(), e.getWheelRotation());
}
 

private MouseWheelEvent cloneEvent(MouseWheelEvent e) {
    return new MouseWheelEvent(getParentScrollPane(), e.getID(), e
            .getWhen(), e.getModifiersEx(), 1, 1, e
            .getClickCount(), false, e.getScrollType(), e
            .getScrollAmount(), e.getWheelRotation());
}
 

private MouseWheelEvent createScrollAmountEvent(MouseWheelEvent e) {
	//  Reset the scroll amount
	return new MouseWheelEvent(e.getComponent(), e.getID(), e.getWhen(), e.getModifiers(),
			e.getX(), e.getY(), e.getXOnScreen(), e.getYOnScreen(),
			e.getClickCount(), e.isPopupTrigger(), e.getScrollType(), scrollAmount, e.getWheelRotation());
}
 

/**
 * Clones a {@link MouseEvent}.
 *
 * @param event       The event to clone.
 * @param source      Pass in a new source.
 * @param where       Pass in a new location.
 * @param refreshTime Pass in {@code true} to generate a new time stamp.
 * @return The new {@link MouseEvent}.
 */
public static final MouseEvent cloneMouseEvent(MouseEvent event, Component source, Point where, boolean refreshTime) {
    if (event instanceof MouseWheelEvent) {
        MouseWheelEvent old = (MouseWheelEvent) event;
        return new MouseWheelEvent(source, old.getID(), refreshTime ? System.currentTimeMillis() : event.getWhen(), old.getModifiersEx(), where.x, where.y, old.getClickCount(), old.isPopupTrigger(), old.getScrollType(), old.getScrollAmount(), old.getWheelRotation());
    }
    return new MouseEvent(source, event.getID(), refreshTime ? System.currentTimeMillis() : event.getWhen(), event.getModifiersEx(), where.x, where.y, event.getClickCount(), event.isPopupTrigger());
}