private void fireDescriptionChanged() {
for (TriangleListener listener : new ArrayList<TriangleListener>(listeners))
listener.descriptionChanged(this);
}
private void fireGeometryChanged() {
for (TriangleListener listener : new ArrayList<TriangleListener>(listeners))
listener.geometryChanged(this);
}
private void fireNameChanged() {
for (TriangleListener listener : new ArrayList<TriangleListener>(listeners))
listener.nameChanged(this);
}