I represent the top level control over scheduling which controller of a view on the screen the user is actively using. ScheduledControllers is the global reference to an instance of me, the one attached to the Project currently being used.

	displaying
	backgroundForm: restore restore: restore:below:without: restore:without: updateGray

	initialize-release
	initialize release

	private
	nextActiveController scheduled:from: unCacheWindows

	scheduling
	activateController: activateTranscript findWindow findWindowSatisfying: inActiveControllerProcess interruptName: promote: resetActiveController scheduleActive: scheduleActiveNoTerminate: scheduleOnBottom: schedulePassive: searchForActiveController unschedule: windowFromUser

	instance creation
	new

	snapshots
	shutDown startUp

	accessing	top
	activeController Answer the currently active controller.
	activeController: Set aController to be the currently active controller. Give the user control in it.
	activeControllerNoTerminate:andProcess: Set aController to be the currently active controller and aProcess to be the the process that handles controller scheduling activities in the system. This message differs from activeController:andProcess: in that it does not send controlTerminate to the currently active controller.
	activeControllerProcess Answer the process that is currently handling controller scheduling activities in the system.
	controllerSatisfying: Return the first scheduled controller which satisfies the 1-argument boolean-valued block, or nil if none. 7/25/96 sw
	controllerWhoseModelSatisfies: Return the first scheduled controller whose model satisfies the 1-argument boolean-valued block, or nil if none. 5/6/96 sw
	controllersSatisfying: Return a list of scheduled controllers satisfying aBlock
	includes:
	noteNewTop
	removeAllControllersSatisfying: Unschedule and delete all controllers satisfying aBlock. May not leave the screen exactly right sometimes.
	scheduledControllers Answer a copy of the ordered collection of scheduled controllers.
	scheduledWindowControllers Same as scheduled controllers, but without ScreenController. Avoids null views just after closing, eg, a debugger.
	screenController
	windowOriginsInUse Answer a collection of the origins of windows currently on the screen in the current project. 5/21/96 sw

	displaying	top
	backgroundForm:
	restore Clear the screen to gray and then redisplay all the scheduled views. Try to be a bit intelligent about the view that wants control and not display it twice if possible.
	restore: Restore all windows visible in aRectangle
	restore:below:without: Restore all windows visible in aRectangle, but without aView
	restore:without: Restore all windows visible in aRectangle
	updateGray From Georg Gollmann - 11/96. tell the Screen Controller's model to use the currently-preferred desktop color.

	initialize-release	top
	initialize Initialize the receiver to refer to only the background controller.
	release Refer to the comment in Object|release.

	private	top
	nextActiveController Answer the controller that would like control. If there was a click outside the active window, it's the top window that now has the mouse, otherwise it's just the top window.
	scheduled:from:
	unCacheWindows

	scheduling	top
	activateController: Make aController, which must already be a scheduled controller, the active window. 5/8/96 sw
	activateTranscript There is known to be a Transcript open in the current project; activate it. 2/5/96 sw
	findWindow Present a menu of window titles, and activate the one that gets chosen.
	findWindowSatisfying: Present a menu of window titles, and activate the one that gets chosen
	inActiveControllerProcess Answer whether the active scheduling process is the actual active process in the system.
	interruptName: Create a Notifier on the active scheduling process with the given label. Make the Notifier the active controller.
	promote: Make aController be the first scheduled controller in the ordered collection.
	resetActiveController When saving a morphic project whose parent is mvc, we need to set this up first
	scheduleActive: Make aController be scheduled as the active controller. Presumably the active scheduling process asked to schedule this controller and that a new process associated this controller takes control. So this is the last act of the active scheduling process.
	scheduleActiveNoTerminate: Make aController be the active controller. Presumably the process that requested the new active controller wants to keep control to do more activites before the new controller can take control. Therefore, do not terminate the currently active process.
	scheduleOnBottom: Make aController be scheduled as a scheduled controller, but not the active one. Put it at the end of the ordered collection of controllers.
	schedulePassive: Make aController be scheduled as a scheduled controller, but not the active one. Put it at the beginning of the ordered collection of controllers.
	searchForActiveController Find a scheduled controller that wants control and give control to it. If none wants control, then see if the System Menu has been requested.
	unschedule: Remove the view, aController, from the collection of scheduled controllers.
	windowFromUser Present a menu of window titles, and returns the StandardSystemController belonging to the one that gets chosen, or nil if none

	exchange	top
	newScheduler: When switching projects, the control scheduler has to be exchanged. The active one is the one associated with the current project.

	instance creation	top
	new Answer a new instance of the receiver (which is a class) with no indexable variables. Fail if the class is indexable.

	snapshots	top
	shutDown Saves space in snapshots
	startUp This message is sent to registered classes when the system is coming up.