/** * Notify any DialogListeners of changes having occurred If a listener returns false, do not call * further listeners and disable the OK button and preview Checkbox (if it exists). For * PlugInFilters, this ensures that the PlugInFilterRunner, which listens as the last one, is not * called if the PlugInFilter has detected invalid parameters. Thus, unnecessary calling the * run(ip) method of the PlugInFilter for preview is avoided in that case. */ private void notifyListeners(AWTEvent e) { if (dialogListeners == null) return; boolean everythingOk = true; for (int i = 0; everythingOk && i < dialogListeners.size(); i++) try { resetCounters(); if (!((DialogListener) dialogListeners.elementAt(i)).dialogItemChanged(this, e)) everythingOk = false; } // disable further listeners if false (invalid parameters) returned catch (Exception err) { // for exceptions, don't cover the input by a window but IJ.beep(); // show them at in the "Log" IJ.log( "ERROR: " + err + "\nin DialogListener of " + dialogListeners.elementAt(i) + "\nat " + (err.getStackTrace()[0]) + "\nfrom " + (err.getStackTrace()[1])); // requires Java 1.4 } boolean workaroundOSXbug = IJ.isMacOSX() && okay != null && !okay.isEnabled() && everythingOk; if (previewCheckbox != null) previewCheckbox.setEnabled(everythingOk); if (okay != null) okay.setEnabled(everythingOk); if (workaroundOSXbug) repaint(); // OSX 10.4 bug delays update of enabled until the next input }