a simply RF popover to jump between fonts

frontAndCenterPopover.py

import ezui
from merz.tools.drawingTools import NSImageDrawingTools 
from mojo.UI import AllFontWindows, CurrentFontWindow, AllWindows, CurrentGlyphWindow

class frontAndCenter(ezui.WindowController):

    def build(self, parent, viewType):
        
        self.buttonMap = {}
        self.parent = parent
        self.font = None
        self.viewType = viewType
        
        self.fontWindows = [(w.document.font,w) for w in AllFontWindows()]
                    
        content = "* VerticalStack\n"
        descriptionData = {}
        for i,f in enumerate(AllFonts(sortOptions="magic")):
            if i % 4 == 0: content += "* HorizontalStack\n"
            content += f"> ({{}}) @image{i}\n"
            descriptionData[f"image{i}"] = {"image":self._glyphToToolbarImage(f,"a"), "callback":self.buttonCallback, "identifier":f.path}
        
        self.w = ezui.EZPopover(
            size=("auto", "auto"),
            content=content,
            descriptionData=descriptionData,
            parent=parent,
            behavior="semitransient",
            controller=self
        )
        
        for i,f in enumerate(AllFonts(sortOptions="magic")):
            item = self.w.getItem(f.path)
            self.buttonMap[item._button] = f


    def started(self):    
        if self.viewType == "fontWindow":
            left, top, width, height = self.parent.getPosSize()
            self.w.open(location=(int(width/2),int(height/2)+top, 1, 1))
        else:
            x,y = self.parent._getMousePosition()
            self.w.open(location=(x, y, 1, 1))
        
    def buttonCallback(self,sender):
        self.font = self.buttonMap.get(sender)
        self.w.close()
        self.bringWindowToFront()
        
    def bringWindowToFront(self):
        for font, win in self.fontWindows:
            f = RFont(font)
            if f == self.font:
                win.w.getNSWindow().makeKeyAndOrderFront_(None)

        if viewType == "glyphWindow":
            window = CurrentGlyphWindow()
            window.setGlyph(self.font[window.getGlyph().name])

    def _glyphToToolbarImage(self,font,glyphName):
        glyph = font[glyphName]
        w = font.info.unitsPerEm 
        sf = 1000/w
        bot = NSImageDrawingTools((w, font.info.xHeight * 1.1), scale=.045 * sf)
        bot.translate((w - glyph.width)/2,abs(glyph.bounds[1]))
        bot.fill(0, 0, 0, 1)
        pen = bot.BezierPath()
        glyph.draw(pen)
        bot.drawPath(pen)
        image = bot.getImage()
        image.setTemplate_(True)
        return image
    
if AllWindows()[0] == CurrentFontWindow():
    w = CurrentFontWindow().window()
    viewType = "fontWindow"
elif AllWindows()[0] == CurrentGlyphWindow():
    w = CurrentGlyphWindow().getGlyphView()
    viewType = "glyphWindow"
frontAndCenter(w,viewType)