/**
* Erases and remarks this on the specified tracker panel. Remarking creates a new mark for the
* step and adds both the old and new bounds to the tracker panel's dirty region.
*
* @param trackerPanel the tracker panel
*/
public void remark(TrackerPanel trackerPanel) {
erase(trackerPanel);
trackerPanel.addDirtyRegion(getBounds(trackerPanel)); // new bounds
}
/**
* Erases this on the specified tracker panel. Erasing adds the current bounds to the dirty region
* and nulls the step's mark to trigger creation of a new one.
*
* @param trackerPanel the tracker panel
*/
public void erase(TrackerPanel trackerPanel) {
if (marks.get(trackerPanel) == null) return; // already dirty
trackerPanel.addDirtyRegion(getBounds(trackerPanel)); // old bounds
marks.put(trackerPanel, null); // triggers new mark
}