protected void processMouseWheelEvent(MouseWheelEvent e) {
MouseWheelEvent transformedEvent = (MouseWheelEvent) transformMouseEvent(e);
MouseWheelListener[] mouseWheelListeners =
transformedEvent.getComponent().getMouseWheelListeners();
for (MouseWheelListener listener : mouseWheelListeners) {
listener.mouseWheelMoved(transformedEvent);
}
super.processMouseWheelEvent(e);
}
private MouseEvent transformMouseEvent(MouseEvent event) {
if (event == null) {
throw new IllegalArgumentException("MouseEvent is null");
}
MouseEvent newEvent;
if (event instanceof MouseWheelEvent) {
MouseWheelEvent mouseWheelEvent = (MouseWheelEvent) event;
newEvent =
new MouseWheelEvent(
mouseWheelEvent.getComponent(),
mouseWheelEvent.getID(),
mouseWheelEvent.getWhen(),
mouseWheelEvent.getModifiers(),
mouseWheelEvent.getX(),
mouseWheelEvent.getY(),
mouseWheelEvent.getClickCount(),
mouseWheelEvent.isPopupTrigger(),
mouseWheelEvent.getScrollType(),
mouseWheelEvent.getScrollAmount(),
mouseWheelEvent.getWheelRotation());
} else {
newEvent =
new MouseEvent(
event.getComponent(),
event.getID(),
event.getWhen(),
event.getModifiers(),
event.getX(),
event.getY(),
event.getClickCount(),
event.isPopupTrigger(),
event.getButton());
}
if (view != null && at.getDeterminant() != 0) {
Rectangle viewBounds = getTransformedSize();
Insets insets = JXTransformer.this.getInsets();
int xgap = (getWidth() - (viewBounds.width + insets.left + insets.right)) / 2;
int ygap = (getHeight() - (viewBounds.height + insets.top + insets.bottom)) / 2;
double x = newEvent.getX() + viewBounds.getX() - insets.left;
double y = newEvent.getY() + viewBounds.getY() - insets.top;
Point2D p = new Point2D.Double(x - xgap, y - ygap);
Point2D tp;
try {
tp = at.inverseTransform(p, null);
} catch (NoninvertibleTransformException ex) {
// can't happen, we check it before
throw new AssertionError("NoninvertibleTransformException");
}
// Use transformed coordinates to get the current component
mouseCurrentComponent =
SwingUtilities.getDeepestComponentAt(view, (int) tp.getX(), (int) tp.getY());
if (mouseCurrentComponent == null) {
mouseCurrentComponent = JXTransformer.this;
}
Component tempComponent = mouseCurrentComponent;
if (mouseDraggedComponent != null) {
tempComponent = mouseDraggedComponent;
}
Point point =
SwingUtilities.convertPoint(view, (int) tp.getX(), (int) tp.getY(), tempComponent);
newEvent.setSource(tempComponent);
newEvent.translatePoint(point.x - event.getX(), point.y - event.getY());
}
return newEvent;
}