BUG: Application activation policy breaks floating status windows in fullscreen

Number:rdar://10800197 Date Originated:
Status:Open Resolved:
Product:Mac OS X Product Version:10.7.2 / 11C74
Classification:Serious Bug Reproducible:Always

NSApplicationActivationPolicyRegular causes irregular behavior with a borderless NSWindow in a popup menu window level while working in fullscreen desktops.

Steps to Reproduce:

Open the attached sample project that:

• Creates an application that uses NSApplicationActivationPolicyRegular
• Creates a borderless NSWindow with a level of kCGPopUpMenuWindowLevelKey
• Sets that window's collectionBehavior to NSWindowCollectionBehaviorCanJoinAllSpaces
• Creates a NSStatusItem that causes a second borderless window to be created


Run the application:

1) A green floating window will appear
2) Switch to an application running in a fullscreen desktop (e.g. Safari)
3) Click on the button in the green window
4) While in the fullscreen desktop, click on the menubar status item labelled "BUG"

Expected Results:

In step 3, the green window should remain in the fullscreen desktop.
In step 4, the red window should appear on the fullscreen desktop.

Actual Results:

In step 3, the green window switches to the first desktop.
In step 4, the red window never appears on the fullscreen desktop.


If the activation policy is set to NSApplicationActivationPolicyAccessory, the windows and desktops behave correctly. Unfortunately, this has a side-effect of removing the application's Dock icon and menubar.


To see these problems in a shipping application, please check out http://xScopeApp.com


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