simple objective C observer inside RoboFont

simpleRFobserver.py

"""
You can use this to get the window name if it has become the key window in
RoboFont. But the same data model can be used to create notifications inside
objc apps.
"""
from objc import python_method

import AppKit
from vanilla import FloatingWindow
from lib.tools.debugTools import ClassNameIncrementer

class _myObserver(AppKit.NSObject, metaclass=ClassNameIncrementer):

	@python_method
	def _start(self):
		self.w = FloatingWindow((300, 90), "KeyEventMonitor Debuggin window")
		self.w.bind("close", self._stop)
		self.w.open()
		nc = AppKit.NSNotificationCenter.defaultCenter()
		nc.addObserver_selector_name_object_(self, 'mainWindowChanged:', AppKit.NSWindowDidBecomeKeyNotification, None)

	def mainWindowChanged_(self, info):
		w = info.object()
		if hasattr(w, 'windowName'):
			print(w.windowName())

	@python_method
	def _stop(self, _):
		AppKit.NSNotificationCenter.defaultCenter().removeObserver_(self)

ob = _myObserver.new()
ob._start()

"""
A list of notifications:

AppKit.NSAccessibilityAnnouncementRequestedNotification
AppKit.NSAccessibilityApplicationActivatedNotification
AppKit.NSAccessibilityApplicationDeactivatedNotification
AppKit.NSAccessibilityApplicationHiddenNotification
AppKit.NSAccessibilityApplicationShownNotification
AppKit.NSAccessibilityCreatedNotification
AppKit.NSAccessibilityDrawerCreatedNotification
AppKit.NSAccessibilityFocusedUIElementChangedNotification
AppKit.NSAccessibilityFocusedWindowChangedNotification
AppKit.NSAccessibilityHelpTagCreatedNotification
AppKit.NSAccessibilityLayoutChangedNotification
AppKit.NSAccessibilityMainWindowChangedNotification
AppKit.NSAccessibilityMovedNotification
AppKit.NSAccessibilityPostNotification
AppKit.NSAccessibilityResizedNotification
AppKit.NSAccessibilityRowCollapsedNotification
AppKit.NSAccessibilityRowCountChangedNotification
AppKit.NSAccessibilityRowExpandedNotification
AppKit.NSAccessibilitySelectedCellsChangedNotification
AppKit.NSAccessibilitySelectedChildrenChangedNotification
AppKit.NSAccessibilitySelectedChildrenMovedNotification
AppKit.NSAccessibilitySelectedColumnsChangedNotification
AppKit.NSAccessibilitySelectedRowsChangedNotification
AppKit.NSAccessibilitySelectedTextChangedNotification
AppKit.NSAccessibilitySheetCreatedNotification
AppKit.NSAccessibilityTitleChangedNotification
AppKit.NSAccessibilityUIElementDestroyedNotification
AppKit.NSAccessibilityUnitsChangedNotification
AppKit.NSAccessibilityValueChangedNotification
AppKit.NSAccessibilityWindowCreatedNotification
AppKit.NSAccessibilityWindowDeminiaturizedNotification
AppKit.NSAccessibilityWindowMiniaturizedNotification
AppKit.NSAccessibilityWindowMovedNotification
AppKit.NSAccessibilityWindowResizedNotification
AppKit.NSAnimationProgressMarkNotification
AppKit.NSAntialiasThresholdChangedNotification
AppKit.NSApplication.isRegisteredForRemoteNotification
AppKit.NSApplicationDidBecomeActiveNotification
AppKit.NSApplicationDidChangeOcclusionStateNotification
AppKit.NSApplicationDidChangeScreenParametersNotification
AppKit.NSApplicationDidFinishLaunchingNotification
AppKit.NSApplicationDidFinishRestoringWindowsNotification
AppKit.NSApplicationDidHideNotification
AppKit.NSApplicationDidResignActiveNotification
AppKit.NSApplicationDidUnhideNotification
AppKit.NSApplicationDidUpdateNotification
AppKit.NSApplicationLaunchRemoteNotification
AppKit.NSApplicationLaunchUserNotification
AppKit.NSApplicationWillBecomeActiveNotification
AppKit.NSApplicationWillFinishLaunchingNotification
AppKit.NSApplicationWillHideNotification
AppKit.NSApplicationWillResignActiveNotification
AppKit.NSApplicationWillTerminateNotification
AppKit.NSApplicationWillUnhideNotification
AppKit.NSApplicationWillUpdateNotification
AppKit.NSBrowserColumnConfigurationDidChangeNotification
AppKit.NSBundleDidLoadNotification
AppKit.NSCell.wantsNotification
AppKit.NSColorListDidChangeNotification
AppKit.NSColorPanelColorDidChangeNotification
AppKit.NSComboBoxSelectionDidChangeNotification
AppKit.NSComboBoxSelectionIsChangingNotification
AppKit.NSComboBoxWillDismissNotification
AppKit.NSComboBoxWillPopUpNotification
AppKit.NSContextHelpModeDidActivateNotification
AppKit.NSContextHelpModeDidDeactivateNotification
AppKit.NSControlTextDidBeginEditingNotification
AppKit.NSControlTextDidChangeNotification
AppKit.NSControlTextDidEndEditingNotification
AppKit.NSControlTintDidChangeNotification
AppKit.NSDrawerDidCloseNotification
AppKit.NSDrawerDidOpenNotification
AppKit.NSDrawerWillCloseNotification
AppKit.NSDrawerWillOpenNotification
AppKit.NSFontCollectionDidChangeNotification
AppKit.NSFontSetChangedNotification
AppKit.NSImageRepRegistryChangedNotification
AppKit.NSImageRepRegistryDidChangeNotification
AppKit.NSInputManager.wantsToDelayTextChangeNotification
AppKit.NSMenuDidAddItemNotification
AppKit.NSMenuDidBeginTrackingNotification
AppKit.NSMenuDidChangeItemNotification
AppKit.NSMenuDidEndTrackingNotification
AppKit.NSMenuDidRemoveItemNotification
AppKit.NSMenuDidSendActionNotification
AppKit.NSMenuWillSendActionNotification
AppKit.NSOutlineViewColumnDidMoveNotification
AppKit.NSOutlineViewColumnDidResizeNotification
AppKit.NSOutlineViewItemDidCollapseNotification
AppKit.NSOutlineViewItemDidExpandNotification
AppKit.NSOutlineViewItemWillCollapseNotification
AppKit.NSOutlineViewItemWillExpandNotification
AppKit.NSOutlineViewSelectionDidChangeNotification
AppKit.NSOutlineViewSelectionIsChangingNotification
AppKit.NSPopUpButtonCellWillPopUpNotification
AppKit.NSPopUpButtonWillPopUpNotification
AppKit.NSPopoverDidCloseNotification
AppKit.NSPopoverDidShowNotification
AppKit.NSPopoverWillCloseNotification
AppKit.NSPopoverWillShowNotification
AppKit.NSPreferredScrollerStyleDidChangeNotification
AppKit.NSRemoteNotification
AppKit.NSRuleEditorRowsDidChangeNotification
AppKit.NSScreenColorSpaceDidChangeNotification
AppKit.NSScrollViewDidEndLiveMagnifyNotification
AppKit.NSScrollViewDidEndLiveScrollNotification
AppKit.NSScrollViewDidLiveScrollNotification
AppKit.NSScrollViewWillStartLiveMagnifyNotification
AppKit.NSScrollViewWillStartLiveScrollNotification
AppKit.NSSpellCheckerDidChangeAutomaticCapitalizationNotification
AppKit.NSSpellCheckerDidChangeAutomaticDashSubstitutionNotification
AppKit.NSSpellCheckerDidChangeAutomaticPeriodSubstitutionNotification
AppKit.NSSpellCheckerDidChangeAutomaticQuoteSubstitutionNotification
AppKit.NSSpellCheckerDidChangeAutomaticSpellingCorrectionNotification
AppKit.NSSpellCheckerDidChangeAutomaticTextCompletionNotification
AppKit.NSSpellCheckerDidChangeAutomaticTextReplacementNotification
AppKit.NSSplitViewDidResizeSubviewsNotification
AppKit.NSSplitViewWillResizeSubviewsNotification
AppKit.NSSystemClockDidChangeNotification
AppKit.NSSystemColorsDidChangeNotification
AppKit.NSTableViewColumnDidMoveNotification
AppKit.NSTableViewColumnDidResizeNotification
AppKit.NSTableViewSelectionDidChangeNotification
AppKit.NSTableViewSelectionIsChangingNotification
AppKit.NSTextAlternativesSelectedAlternativeStringNotification
AppKit.NSTextDidBeginEditingNotification
AppKit.NSTextDidChangeNotification
AppKit.NSTextDidEndEditingNotification
AppKit.NSTextFieldCell.setWantsNotification
AppKit.NSTextInputContextKeyboardSelectionDidChangeNotification
AppKit.NSTextStorageDidProcessEditingNotification
AppKit.NSTextStorageWillProcessEditingNotification
AppKit.NSTextViewDidChangeSelectionNotification
AppKit.NSTextViewDidChangeTypingAttributesNotification
AppKit.NSTextViewWillChangeNotifyingTextViewNotification
AppKit.NSToolbarDidRemoveItemNotification
AppKit.NSToolbarWillAddItemNotification
AppKit.NSView.postsBoundsChangedNotification
AppKit.NSView.postsFrameChangedNotification
AppKit.NSView.setPostsBoundsChangedNotification
AppKit.NSView.setPostsFrameChangedNotification
AppKit.NSViewBoundsDidChangeNotification
AppKit.NSViewDidUpdateTrackingAreasNotification
AppKit.NSViewFocusDidChangeNotification
AppKit.NSViewFrameDidChangeNotification
AppKit.NSViewGlobalFrameDidChangeNotification
AppKit.NSWindowDidBecomeKeyNotification
AppKit.NSWindowDidBecomeMainNotification
AppKit.NSWindowDidChangeBackingPropertiesNotification
AppKit.NSWindowDidChangeOcclusionStateNotification
AppKit.NSWindowDidChangeScreenNotification
AppKit.NSWindowDidChangeScreenProfileNotification
AppKit.NSWindowDidDeminiaturizeNotification
AppKit.NSWindowDidEndLiveResizeNotification
AppKit.NSWindowDidEndSheetNotification
AppKit.NSWindowDidEnterFullScreenNotification
AppKit.NSWindowDidEnterVersionBrowserNotification
AppKit.NSWindowDidExitFullScreenNotification
AppKit.NSWindowDidExitVersionBrowserNotification
AppKit.NSWindowDidExposeNotification
AppKit.NSWindowDidMiniaturizeNotification
AppKit.NSWindowDidMoveNotification
AppKit.NSWindowDidResignKeyNotification
AppKit.NSWindowDidResignMainNotification
AppKit.NSWindowDidResizeNotification
AppKit.NSWindowDidUpdateNotification
AppKit.NSWindowWillBeginSheetNotification
AppKit.NSWindowWillCloseNotification
AppKit.NSWindowWillEnterFullScreenNotification
AppKit.NSWindowWillEnterVersionBrowserNotification
AppKit.NSWindowWillExitFullScreenNotification
AppKit.NSWindowWillExitVersionBrowserNotification
AppKit.NSWindowWillMiniaturizeNotification
AppKit.NSWindowWillMoveNotification
AppKit.NSWindowWillStartLiveResizeNotification
AppKit.NSWorkspaceAccessibilityDisplayOptionsDidChangeNotification
AppKit.NSWorkspaceActiveSpaceDidChangeNotification
AppKit.NSWorkspaceDidActivateApplicationNotification
AppKit.NSWorkspaceDidChangeFileLabelsNotification
AppKit.NSWorkspaceDidDeactivateApplicationNotification
AppKit.NSWorkspaceDidHideApplicationNotification
AppKit.NSWorkspaceDidLaunchApplicationNotification
AppKit.NSWorkspaceDidMountNotification
AppKit.NSWorkspaceDidPerformFileOperationNotification
AppKit.NSWorkspaceDidRenameVolumeNotification
AppKit.NSWorkspaceDidTerminateApplicationNotification
AppKit.NSWorkspaceDidUnhideApplicationNotification
AppKit.NSWorkspaceDidUnmountNotification
AppKit.NSWorkspaceDidWakeNotification
AppKit.NSWorkspaceScreensDidSleepNotification
AppKit.NSWorkspaceScreensDidWakeNotification
AppKit.NSWorkspaceSessionDidBecomeActiveNotification
AppKit.NSWorkspaceSessionDidResignActiveNotification
AppKit.NSWorkspaceWillLaunchApplicationNotification
AppKit.NSWorkspaceWillPowerOffNotification
AppKit.NSWorkspaceWillSleepNotification
AppKit.NSWorkspaceWillUnmountNotification
"""