Funnel represented objects between stages, fixed bug with non-animate…

…d window calling didDoSomething methods.

DPSetupWindow.h

@@ -71,6 +71,7 @@
 @property (retain) NSImage *backgroundImage;
 @property (assign) BOOL animates;
 @property (retain) NSArray *viewControllers;
+@property (assign) BOOL funnelsRepresentedObjects;
 
 - (id)initWithViewControllers:(NSArray *)viewControllers completionHandler:(void (^)(BOOL completed))completionHandler;
 

DPSetupWindow.m

@@ -35,6 +35,7 @@ - (id)initWithViewControllers:(NSArray *)viewControllers completionHandler:(void
 
 	currentStage = -1;
 	_animates = YES;
+	_funnelsRepresentedObjects = NO;
 	[self setViewControllers:viewControllers];
 	[self setCompletionHandler:completionHandler];
 	[[self viewControllers] enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
@@ -171,6 +172,20 @@ - (void)shift:(DPSetupWindowDirection)direction {
 		[nextViewController performSelectorIfExists:@selector(willRevertToStage)];
 	}
 
+	void (^finished)() = ^{
+		if (direction == DPSetupWindowNextDirection) {
+			[previousViewController performSelectorIfExists:@selector(didProgressToNextStage)];
+			[nextViewController performSelectorIfExists:@selector(didProgressToStage)];
+		} else if (direction == DPSetupWindowBackDirection)	{
+			[previousViewController performSelectorIfExists:@selector(didRevertToPreviousStage)];
+			[nextViewController performSelectorIfExists:@selector(didRevertToStage)];
+		}
+	};
+
+	if ([self funnelsRepresentedObjects]) {
+		[nextViewController setRepresentedObject:[previousViewController representedObject]];
+	}
+
 	if ([self animates] && previousViewController) {
 		[NSAnimationContext beginGrouping];
 
@@ -179,13 +194,7 @@ - (void)shift:(DPSetupWindowDirection)direction {
 		}
 		[[NSAnimationContext currentContext] setCompletionHandler:^{
 			[[previousViewController view] removeFromSuperviewWithoutNeedingDisplay];
-			if (direction == DPSetupWindowNextDirection) {
-				[previousViewController performSelectorIfExists:@selector(didProgressToNextStage)];
-				[nextViewController performSelectorIfExists:@selector(didProgressToStage)];
-			} else if (direction == DPSetupWindowBackDirection)	{
-				[previousViewController performSelectorIfExists:@selector(didRevertToPreviousStage)];
-				[nextViewController performSelectorIfExists:@selector(didRevertToStage)];
-			}
+			finished();
 		}];
 
 		[view setFrame:NSMakeRect((400 * direction), 0, 400, 330)];
@@ -200,6 +209,7 @@ - (void)shift:(DPSetupWindowDirection)direction {
 			[[previousViewController view] removeFromSuperviewWithoutNeedingDisplay];
 		}
 		[[self contentBox] addSubview:view];
+		finished();
 	}
 
 	currentStage = nextStage;

Readme.md

@@ -53,6 +53,11 @@ application's icon.
 [setupFlow setBackgroundImage:[NSImage imageNamed:@"NSUserAccounts"]];
 ```
 
+The setup process can also be set to funnel the `representedObject` property of
+each view controller along to the next as a way of moving state between stages.
+This is not enabled by default and can be set by calling 
+`setFunnelsRepresentedObjects:` on the setup process window.
+
 Each view controller in the setup process must implement the optional
 `DPSetupWindowStageViewController` protocol.