public boolean startDragging(MouseEvent mouseEvent) {
// Get the mouse position and the component of the mouse event.
Component mouseComponent = (Component) mouseEvent.getSource();
int x = mouseEvent.getX();
int y = mouseEvent.getY();
// Reset the fields.
reset();
// Initialize the fields for docking.
// Get the origin dock.
originDock = (LeafDock) SwingUtilities.getAncestorOfClass(LeafDock.class, mouseComponent);
if (originDock != null) {
// Control that the dragged dockable belongs to this dock.
if (originDock.containsDockable(draggedDockable)) {
// Calculate the dockable offset.
dockableOffset.setLocation(x, y);
dockableOffset =
SwingUtilities.convertPoint(
mouseComponent, dockableOffset, draggedDockable.getContent());
// We could find a dockable for dragging.
return true;
}
}
// We could not find a dockable for dragging.
return false;
}
/** Adds a drag listener on the content component of a dockable. */
private void createDockableDragger(Dockable dockable) {
// Create the dragger for the dockable.
DragListener dragListener =
DockingManager.getDockableDragListenerFactory().createDragListener(dockable);
dockable.getContent().addMouseListener(dragListener);
dockable.getContent().addMouseMotionListener(dragListener);
}