RoboFont subscriber to rotate both the glyph view and space center to help out drawing Mongolian, where the letter shapes are stored in binaries 90° rotated.

rotateSubscribers.py

"""
RoboFont subscriber to rotate both the glyph view and space center to help out drawing Mongolian, 
where the letter shapes are stored in binaries 90° rotated.
"""

from AppKit import NSNotificationCenter, NSViewFrameDidChangeNotification

import ezui
from mojo.subscriber import Subscriber, registerSpaceCenterSubscriber, unregisterSpaceCenterSubscriber, registerGlyphEditorSubscriber, unregisterGlyphEditorSubscriber, WindowController
from mojo.tools import CallbackWrapper


class RotatedMixin:
    
    rotation = -90
                    
    def subscribeView(self):
        self.rotateView(self.rotatedView, self.rotation)
        self._callback = CallbackWrapper(self.rotateViewFrameChanged)
        NSNotificationCenter.defaultCenter().addObserver_selector_name_object_(self._callback, "action:", NSViewFrameDidChangeNotification, self.rotatedView)

    def unsubscribeView(self):
        NSNotificationCenter.defaultCenter().removeObserver_(self._callback)
        if self.rotatedView.frameRotation() != 0:
            self.rotateView(self.rotatedView, 0)
            
    def rotateView(self, view, rotation):
        (x, y), (w, h) = view.frame()
        view.setFrameRotation_(rotation)
        self._ignoreFrameChanges = True
        
        if rotation == 0:
            view.setFrame_(((x, y-w), (h, w)))
        elif rotation == -90:
            view.setFrame_(((x, h + y), (h, w)))

        documentView = view.documentView()
        if hasattr(documentView, "recalculateFrame"):
            documentView.recalculateFrame()
        self._ignoreFrameChanges = False
    
    def rotateViewFrameChanged(self, notification):
        if self._ignoreFrameChanges:
            return
        view = notification.object()

        superview = view.superview()
        bounds = superview.bounds()

        self._ignoreFrameChanges = True
        (x, y), (w, h) = bounds

        view.setFrame_(((x + self.frameAdjustments[0], h + y + self.frameAdjustments[1]),
                        (h + self.frameAdjustments[2], w + self.frameAdjustments[3])))
        self._ignoreFrameChanges = False
    
class RotateGlyphEditorSubscriber(Subscriber, RotatedMixin):
    
    debug = True
    
    frameAdjustments = 0, 0, 0, 0
    
    def started(self):        
        glyphEditor = self.getGlyphEditor()
        self.rotatedView = glyphEditor.editGlyphView.enclosingScrollView()
        self.subscribeView()
    
    def destroy(self):
        self.unsubscribeView()

    
class RotateSpaceCenterSubscriber(Subscriber, RotatedMixin):
    
    debug = True
    
    frameAdjustments = 0, -40, -89, 0
    
    def started(self):
        spaceCenter = self.getSpaceCenter()
        self.rotatedView = spaceCenter.glyphLineView.getNSScrollView()
        self.rotatedView.setScrollerStyle_(0)
        self.subscribeView()
    
    def destroy(self):
        self.unsubscribeView()

            
class RotateController(WindowController):
    
    def build(self):
        content = """
        [X] Rotate Views  @rotateViews
        """
        descriptionData = dict()
        self.w = ezui.EZPanel(
            title="Rotator",
            content=content,
            descriptionData=descriptionData,
            size="auto",
            controller=self
        )
    
    def activate(self):
        registerGlyphEditorSubscriber(RotateGlyphEditorSubscriber)
        registerSpaceCenterSubscriber(RotateSpaceCenterSubscriber)
    
    def deactivate(self):
        unregisterGlyphEditorSubscriber(RotateGlyphEditorSubscriber)
        unregisterSpaceCenterSubscriber(RotateSpaceCenterSubscriber)
        
    def started(self):
        self.w.open()
        self.activate()        
    
    def destroy(self):
        self.deactivate()
        
    def rotateViewsCallback(self, sender):
        if sender.get():
            self.activate()
        else:
            self.deactivate()
        

OpenWindow(RotateController)