static void DocumentManager_DocumentBecameCurrent(object sender, DocumentCollectionEventArgs e)
{
// DocumentBecameCurrent event fires multiple times for a document switch, it fires first with the new document with isActive = true,
// then fires with the old document with isActive false and then once again with the new document with isActive = true.
// Hence we put this double check below of processing only if active and different from the document stored in memory.
// The world outside the AutoCADManager will only see one event bubbled correctly.
if (e.Document != null)
{
var isActive = e.Document.IsActive;
if (isActive)
{
var documentThatJustBecameCurrent = e.Document == null ? null : e.Document.Name;
if (!String.Equals(documentThatJustBecameCurrent, currentDocument)) //currentDocument is saved from last time around.
{
currentDocument = documentThatJustBecameCurrent;
DocumentChanged(sender, e);
}
}
}
}
