[Mono-osx] [MonoMac] shared NSDocument

[Duane Wandless]

I'm trying to create a Document based app.  I need to share MyDocument
across multiple view controller NIBs.  So in each NIB I add an NSDocument
object then change the class to be MyDocument.  As each VC is loaded a new
MyDocument object is created.  However this is incorrect we want the initial
MyDocument object to be used.  In the obj-c app we have this is being done:

   static MyDocument* sharedDocument;


- (id)init

{

if(!sharedDocument)

{

 self = [super init];

  if (self != nil) {

 sharedDocument=self;

 }

}

     return sharedDocument;

}


+(MyDocument*)sharedDocument

{

if(!sharedDocument)

{

 [[MyDocument alloc] init];

}

 return sharedDocument;

}

And here is how I implemented this.  I'm not sure if this is the best
solution.  I'm concerned there will be a leak, though I have not looked yet.
 Any suggestions are appreciated.

public MyDocument (IntPtr handle) : base(SharedDocument == null ? handle :
SharedDocument.Handle)
{
if (SharedDocument == null)
{
SharedDocument = this;
}
}


Thanks,
Duane
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