from vanilla import *
from mojo.glyphPreview import GlyphPreview
from mojo.events import addObserver
from mojo.roboFont import OpenWindow

class InterpTool:

    def __init__(self):
        self.w = Window((440, 400), "Interpolator Tool", minSize=(100, 100))
        self.w.preview = GlyphPreview((0, 30, -0, -0))
        
        self.w.t = TextBox((10,50,100,20))

        self.factor = 2.0

        addObserver(self, "_currentGlyphChanged", "currentGlyphChanged")
        
        
        self.w.slider = Slider((10,10,-10,23), 
                               tickMarkCount=4,
                               callback=self.setFactor,
                               minValue=-1,
                               maxValue=2,
                               value=self.factor,
                               continuous=False)

        
        self.fs = AllFonts()
        
        self.setGlyph()
        self.w.open()

    def _currentGlyphChanged(self, glyph, info):
        self.setGlyph()

    def setGlyph(self):
        if not CurrentGlyph():
            return
            
        glyphname = CurrentGlyph().name
        
        if len(self.fs) > 0:
            if self.fs[0][glyphname].isCompatible(self.fs[1][glyphname])[0]:
                newGlyph = RGlyph()
                newGlyph.interpolate(self.factor, self.fs[0][glyphname], self.fs[1][glyphname])
                self.w.t.set("Compatible")
                self.w.preview.setGlyph(newGlyph)
            else:
                self.w.t.set("Incompatible")
                self.w.preview.setGlyph(CurrentGlyph())

    def setFactor(self, sender):
        self.factor = sender.get()
        print self.factor
        self.setGlyph()
        
OpenWindow(InterpTool)