aPreviewer.py for Robofont, show the current glyph big and small as a simple alternative to looking at drawings in space center.

aPreviewer.py

# jackson @ okaytype.com
# simpler big glyph preview window v3

from vanilla import Window
from defconAppKit.windows.baseWindow import BaseWindowController
from mojo import events
from mojo.events import addObserver, removeObserver
from mojo.glyphPreview import GlyphPreview

class BigGlyphPreview(BaseWindowController):

    def __init__(self):
        
        self.font = CurrentFont()
        self.glyph = CurrentGlyph()
 
        ## create window
        self.w = Window((720, 600), self.glyphName(), minSize=(72, 86))
        self.w.preview = GlyphPreview((0, 20, 0, -20))
        self.glyphChanged(CurrentGlyph())

        events.addObserver(self, "glyphChanged", "currentGlyphChanged")
        addObserver(self, "stopObservers", "fontWillClose")
        self.setUpBaseWindowBehavior()
        self.w.open()

    def glyphName(self):
        if CurrentGlyph():
            return CurrentGlyph().name
        else:
            return 'Select a Glyph'
                        
    def windowCloseCallback(self, sender):
        events.removeObserver(self, "currentGlyphChanged")
        events.removeObserver(self, "fontWillClose")
        super(BigGlyphPreview, self).windowCloseCallback(sender)

    def glyphChanged(self, info):
        self.w.setTitle(self.glyphName())
        self.font = CurrentFont()
        self.glyph = CurrentGlyph()
        self.w.preview.setGlyph(CurrentGlyph())

BigGlyphPreview()