Exemple #1
0
    def drawOnGlyphCanvas(self, infoDict):
        glyphOnCanvas = infoDict['glyph']
        scalingFactor = infoDict['scale']
        bodySize = .25
        horizontalOffset = 80

        if PLUGIN_LIB_NAME in glyphOnCanvas.lib:
            thisLib = glyphOnCanvas.lib[PLUGIN_LIB_NAME]
        else:
            return None

        lftGlyph = None
        if thisLib['lft'] != '':
            lftGlyph = self.selectedFont[thisLib['lft']]

        rgtGlyph = None
        if thisLib['rgt'] != '':
            rgtGlyph = self.selectedFont[thisLib['rgt']]

        try:
            dt.fill(*GRAY)

            if lftGlyph is not None:
                dt.save()
                dt.translate(-lftGlyph.width * bodySize - horizontalOffset,
                             -self.selectedFont.info.unitsPerEm * bodySize)

                # glyph
                dt.scale(bodySize)
                dt.drawGlyph(lftGlyph)

                # lock
                if thisLib['lftActive'] is True:
                    txt = u'🔒'
                else:
                    txt = u'🔓'
                dt.fontSize(300)
                txtWdt, txtHgt = dt.textSize(txt)
                dt.text(txt, (-txtWdt, 0))
                dt.restore()

            if rgtGlyph is not None:
                dt.save()
                dt.translate(glyphOnCanvas.width + horizontalOffset,
                             -self.selectedFont.info.unitsPerEm * bodySize)
                dt.scale(bodySize)
                dt.drawGlyph(rgtGlyph)

                # lock
                if thisLib['rgtActive'] is True:
                    txt = u'🔒'
                else:
                    txt = u'🔓'
                dt.fontSize(300)
                dt.text(txt, (rgtGlyph.width, 0))

                dt.restore()

        except Exception as error:
            print(error)
Exemple #2
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def textQualities(scaledFontSize, weight='regular', color=BLACK_COLOR):
    dt.stroke(None)
    dt.fill(*color)
    if weight == 'bold':
        dt.font(SYSTEM_FONT_NAME_BOLD)
    else:
        dt.font(SYSTEM_FONT_NAME)
    dt.fontSize(scaledFontSize)
Exemple #3
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def drawLock(closed, startingX, glyphQuota, scalingFactor):
    dt.save()
    dt.fill(*BLACK)
    dt.translate(startingX, 0)
    dt.scale(scalingFactor, scalingFactor)
    dt.translate(0, glyphQuota)
    dt.fontSize(300)
    if closed is True:
        txt = u'🔒'
    else:
        txt = u'🔓'
    txtWdt, txtHgt = dt.textSize(txt)
    dt.text(txt, (-txtWdt / 2, 0))
    dt.restore()
    def drawObserver(self, notification):

        glyph = notification['glyph']
        scale = notification['scale']

        lockStatus = self.getLockStatus(glyph)
        if not lockStatus:  # is None:
            return

        lockStatusIcon = '🔒' if lockStatus else '🔓'
        ctx.save()
        ctx.fontSize(24 * scale)
        ctx.textBox(lockStatusIcon, (0, -100, glyph.width, 24 * scale),
                    align='right')
        ctx.restore()
    def spaceCenterDrawObserver(self, notification):

        glyph = notification['glyph']
        scale = notification['scale']

        lockStatus = self.getLockStatus(glyph)
        if not lockStatus:  # is None:
            return

        lockStatusIcon = '🔒' if lockStatus else '🔓'  # 'L' if lockStatus else 'U'
        ctx.save()
        ctx.scale(1, -1)
        ctx.fontSize(120)
        ctx.text(lockStatusIcon, (glyph.width - 100, 30))
        ctx.restore()
Exemple #6
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 def _drawMetricsCorrection(self, correction):
     dt.save()
     dt.fill(*BLACK)
     dt.stroke(None)
     dt.translate(
         0,
         self.fontObj.info.unitsPerEm + self.fontObj.info.descender + 100)
     dt.scale(1 /
              (self.ctrlHeight /
               (self.canvasScalingFactor * self.fontObj.info.unitsPerEm)))
     dt.font(SYSTEM_FONT_NAME)
     dt.fontSize(BODY_SIZE)
     textWidth, textHeight = dt.textSize('{:+d}'.format(correction))
     dt.textBox('{:+d}'.format(correction),
                (-textWidth / 2., -textHeight / 2., textWidth, textHeight),
                align='center')
     dt.restore()
Exemple #7
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 def _drawArrow(self, position, kind, size, width):
     x, y = position
     save()
     translate(x, y)
     fill(0, 0.8, 0, 0.1)
     strokeWidth(width)
     stroke(0.9, 0.1, 0, 0.85)
     line(-width / 2, 0, size, 0)
     line(0, width / 2, 0, -size)
     line(0, 0, size, -size)
     #rect(x-scale, y-scale, scale, scale)
     if self.showLabels:
         fill(0.4, 0.4, 0.4, 0.7)
         stroke(None)
         font("LucidaGrande")
         fontSize(int(round(size * 1.1)))
         text(kind, (int(round(size * 1.8)), int(round(-size))))
     restore()
Exemple #8
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 def _drawArrow(self, position, kind, size, width):
     x, y = position
     save()
     translate(x, y)
     fill(0, 0.8, 0, 0.1)
     strokeWidth(width)
     stroke(0.9, 0.1, 0, 0.85)
     line(-width/2, 0, size, 0)
     line(0, width/2, 0, -size)
     line(0, 0, size, -size)
     #rect(x-scale, y-scale, scale, scale)
     if self.showLabels:
         fill(0.4, 0.4, 0.4, 0.7)
         stroke(None)
         font("LucidaGrande")
         fontSize(int(round(size * 1.1)))
         text(kind, (int(round(size * 1.8)), int(round(-size))))
     restore()
    def drawCellObserver(self, notification):
        # print(notification.keys())
        # print(notification["glyphCell"])
        # print(notification["cell"])

        glyph = notification["glyph"]

        if self.w.mode.get() == 0:
            return

        lockStatus = self.getLockStatus(glyph)
        if not lockStatus:  # is None:
            return

        lockStatusIcon = '🔒' if lockStatus else '🔓'
        ctx.save()
        ctx.fontSize(16)
        ctx.text(lockStatusIcon, (0, 0))
        ctx.restore()
Exemple #10
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    def draw(self):
        try:
            dt.save()
            dt.font(SYSTEM_FONT_NAME)
            dt.fontSize(CAPTION_BODY_SIZE)
            for indexGlyphName, eachGlyphName in enumerate(
                    self.glyphNamesToDisplay):

                # in this way it does not draw what's outside the canvas frame!
                if SPACING_COL_WIDTH * indexGlyphName > self.getPosSize()[2]:
                    continue

                self._drawMatrixColumn(eachGlyphName)
                dt.translate(SPACING_COL_WIDTH, 0)

                self._setBoxQualities()
                dt.line((0, 0), (0, self.getPosSize()[3]))

            dt.restore()

        except Exception, error:
            print traceback.format_exc()
Exemple #11
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    def _drawCollisions(self, aPair):
        dt.save()

        correction, kerningReference, pairKind = getCorrection(
            aPair, self.fontObj)

        if kerningReference is None:
            lftName, rgtName = aPair
        else:
            lftName, rgtName = kerningReference

        lftGlyphs = []
        if lftName.startswith('@MMK') is True:
            lftGlyphs = self.fontObj.groups[lftName]
        else:
            lftGlyphs = [lftName]

        rgtGlyphs = []
        if rgtName.startswith('@MMK') is True:
            rgtGlyphs = self.fontObj.groups[rgtName]
        else:
            rgtGlyphs = [rgtName]

        dt.fontSize(COLLISION_BODY_SIZE)

        breakCycle = False
        for eachLftName in lftGlyphs:
            for eachRgtName in rgtGlyphs:
                isTouching = checkIfPairOverlaps(self.fontObj[eachLftName],
                                                 self.fontObj[eachRgtName])
                if isTouching:
                    dt.text(u'💥', (0, 0))
                    breakCycle = True
                    break

            if breakCycle is True:
                break
        dt.restore()
Exemple #12
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    def _drawMetricsData(self, glyphName, offset):
        dt.save()
        glyphToDisplay = self.fontObj[glyphName]
        dt.translate(0, self.fontObj.info.descender)
        reverseScalingFactor = 1 / (
            self.ctrlHeight /
            (self.canvasScalingFactor * self.fontObj.info.unitsPerEm))

        if self.isSidebearingsActive is True:
            dt.fill(None)
            dt.stroke(*BLACK)
            dt.strokeWidth(reverseScalingFactor)
            dt.line((0, 0), (0, -offset * reverseScalingFactor))
            dt.line((glyphToDisplay.width, 0),
                    (glyphToDisplay.width, -offset * reverseScalingFactor))
        dt.restore()

        dt.save()
        dt.translate(0, self.fontObj.info.descender)
        dt.translate(0, -offset * reverseScalingFactor)
        dt.fill(*BLACK)

        dt.stroke(None)
        dt.font(SYSTEM_FONT_NAME)
        dt.fontSize(BODY_SIZE * reverseScalingFactor)

        textWidth, textHeight = dt.textSize(u'{}'.format(glyphToDisplay.width))
        dt.textBox(u'{:d}'.format(int(glyphToDisplay.width)),
                   (0, 0, glyphToDisplay.width, textHeight * 2),
                   align='center')
        dt.textBox(u'\n{:d}'.format(int(glyphToDisplay.leftMargin)),
                   (0, 0, glyphToDisplay.width / 2., textHeight * 2),
                   align='center')
        dt.textBox(u'\n{:d}'.format(int(glyphToDisplay.rightMargin)),
                   (glyphToDisplay.width / 2., 0, glyphToDisplay.width / 2.,
                    textHeight * 2),
                   align='center')
        dt.restore()
Exemple #13
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 def _setTypeQualities(self, color):
     dt.fill(*color)
     dt.stroke(None)
     dt.fontSize(CAPTION_BODY_SIZE)
     dt.font(SYSTEM_FONT_NAME)
Exemple #14
0
    def draw(self, scale):
        if not self._didCalculate: return
        cornerDot = bcpDot = tanDot = 4
        if self.dragState == 'flats':
            tanDot = 10
        elif self.dragState == "curves":
            bcpDot = 10

        stackedbv = self._b1_v == self._b2_v
        stackedbh = self._b1_h == self._b2_h
        stackedtv = self._t1_v == self._t2_v
        stackedth = self._t1_h == self._t2_h
        self.dot((self._xMin, self._t1_v),
                 s=tanDot,
                 scale=scale,
                 stacked=stackedtv)
        self.dot((self._xMax, self._t1_v),
                 s=tanDot,
                 scale=scale,
                 stacked=stackedtv)
        self.dot((self._xMin, self._t2_v),
                 s=tanDot,
                 scale=scale,
                 stacked=stackedtv)
        self.dot((self._xMax, self._t2_v),
                 s=tanDot,
                 scale=scale,
                 stacked=stackedtv)
        self.dot((self._t1_h, self._yMin),
                 s=tanDot,
                 scale=scale,
                 stacked=stackedth)
        self.dot((self._t1_h, self._yMax),
                 s=tanDot,
                 scale=scale,
                 stacked=stackedth)
        self.dot((self._t2_h, self._yMin),
                 s=tanDot,
                 scale=scale,
                 stacked=stackedth)
        self.dot((self._t2_h, self._yMax),
                 s=tanDot,
                 scale=scale,
                 stacked=stackedth)
        self.dot((self._xMin, self._b1_v),
                 s=bcpDot,
                 scale=scale,
                 stacked=stackedbv)
        self.dot((self._xMax, self._b1_v),
                 s=bcpDot,
                 scale=scale,
                 stacked=stackedbv)
        self.dot((self._xMin, self._b2_v),
                 s=bcpDot,
                 scale=scale,
                 stacked=stackedbv)
        self.dot((self._xMax, self._b2_v),
                 s=bcpDot,
                 scale=scale,
                 stacked=stackedbv)
        self.dot((self._b1_h, self._yMax),
                 s=bcpDot,
                 scale=scale,
                 stacked=stackedbh)
        self.dot((self._b2_h, self._yMax),
                 s=bcpDot,
                 scale=scale,
                 stacked=stackedbh)
        self.dot((self._b1_h, self._yMin),
                 s=bcpDot,
                 scale=scale,
                 stacked=stackedbh)
        self.dot((self._b2_h, self._yMin),
                 s=bcpDot,
                 scale=scale,
                 stacked=stackedbh)
        ctx.save()
        ctx.stroke(1, 0, 0, .4)
        ctx.fill(0, 0, 0, 0.03)
        ctx.strokeWidth(.5 * scale)
        self.buildShapePath(scale)
        ctx.drawPath()

        center = .5 * (self._xMax + self._xMin), .5 * (self._yMax + self._yMin)
        self.dot(center, scale=scale)
        ctx.fontSize(10 * scale)
        ctx.fill(1, 0.5, 0)
        ctx.font("Menlo-Regular")
        ctx.stroke(None)
        t = "the symmetrical,\nround shape\ndrawing tool\npress command to move the flat\npress option to move the bcps\n\nwidth %3.3f\nheight %3.3f" % (
            self._width, self._height)
        if self._orientation:
            t += "\nhorizontal"
        else:
            t += "\nvertical"
        if self.dragState == "flats":
            t += "\n\nyou're changing the flat factor\nx %3.3f\ny %3.3f" % (
                self.flatFactor_x, self.flatFactor_y)
        elif self.dragState == "curves":
            t += "\n\nyou're changing the bcp factor\nx %3.3f\ny %3.3f" % (
                self.bcpFactor_x, self.bcpFactor_y)
        ctx.text(t, center)
        ctx.restore()
Exemple #15
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 def draw(self, scale):
     circleRadius = 12 * scale
     if self.selectionBounds:
         # The selection rect
         rect = (self.selectionBounds[0], self.selectionBounds[1],
                 self.selectionBounds[2] - self.selectionBounds[0],
                 self.selectionBounds[3] - self.selectionBounds[1])
         dt.save()
         dt.font("Lucida Grande")
         dt.fontSize(11 * scale)
         # Circles around opoints
         dt.fill(None)
         dt.stroke(*self.selectionColor[0:3], 0.25)
         dt.strokeWidth(7 * scale)
         for point in self.glyph.selection:
             dt.oval(point.x - circleRadius, point.y - circleRadius,
                     circleRadius * 2, circleRadius * 2)
         # Bounding box
         dt.strokeWidth(1 * scale)
         dt.stroke(*self.selectionColor)
         dt.rect(*rect)
         # Boxes on the handles
         for handle, handleLoc in self.selectionHandles.items():
             dt.strokeWidth(2 * scale)
             dt.stroke(*self.selectionColor[0:3], 1)
             if handle == self.selectedHandle:
                 dt.fill(*self.selectionColor[0:3], 1)
                 boxRadius = 6 * scale
             else:
                 dt.fill(None)
                 boxRadius = 4 * scale
             # Draw the handle
             dt.rect(handleLoc[0] - boxRadius, handleLoc[1] - boxRadius,
                     boxRadius * 2, boxRadius * 2)
             # Draw the handle delta text
             dt.stroke(None)
             dt.fill(*self.selectionColor[0:3], 1)
             if handle == "N":
                 dt.textBox(str(
                     int(self.selectionBounds[3] -
                         self.cachedSelectionBounds[3])),
                            (handleLoc[0] - (100 * scale), handleLoc[1],
                             (200 * scale), (20 * scale)),
                            align="center")
             if handle == "S":
                 dt.textBox(str(
                     int(self.selectionBounds[1] -
                         self.cachedSelectionBounds[1])),
                            (handleLoc[0] - (100 * scale), handleLoc[1] -
                             (30 * scale), (200 * scale), (20 * scale)),
                            align="center")
             if handle == "E":
                 dt.textBox(str(
                     int(self.selectionBounds[2] -
                         self.cachedSelectionBounds[2])),
                            (handleLoc[0] + (10 * scale), handleLoc[1] -
                             (11 * scale), (200 * scale), (20 * scale)),
                            align="left")
             if handle == "W":
                 dt.textBox(str(
                     int(self.selectionBounds[0] -
                         self.cachedSelectionBounds[0])),
                            (handleLoc[0] - (211 * scale), handleLoc[1] -
                             (11 * scale), (200 * scale), (20 * scale)),
                            align="right")
         # Draw the scale text
         dt.stroke(None)
         dt.fill(*self.selectionColor[0:3], 1)
         infoText = "Scale: %.3f %.3f" % self.currentScale
         dt.text(infoText, self.selectionBounds[2] + (10 * scale),
                 self.selectionBounds[1] - (20 * scale))
         dt.restore()
Exemple #16
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    def drawAxisPreview(self,
                        glyph,
                        color,
                        scale,
                        customColor,
                        view=False,
                        flatComponentColor=(.8, .6, 0, .7),
                        drawSelectedElements=True):
        mjdt.save()
        index = None
        # loc = {}
        # if glyph.selectedSourceAxis:
        #     loc = {glyph.selectedSourceAxis:1}
        # for i, atomicInstance in enumerate(glyph.preview()):
        for i, atomicInstance in enumerate(
                glyph.preview(forceRefresh=False, axisPreview=True)):
            # for i, atomicInstance in enumerate(glyph.previewGlyph):
            transformIntance = atomicInstance._transformation
            atomicInstance = atomicInstance.glyph

            mjdt.fill(*color)
            if drawSelectedElements and i in glyph.selectedElement:
                mjdt.save()
                mjdt.stroke(1, 0, 0, 1)
                mjdt.strokeWidth(1 * scale)
                tx = transformIntance['x'] + transformIntance['tcenterx']
                ty = transformIntance['y'] + transformIntance['tcentery']
                mjdt.line((tx - 5 * scale, ty), (tx + 5 * scale, ty))
                mjdt.line((tx, ty - 5 * scale), (tx, ty + 5 * scale))
                mjdt.stroke(None)
                mjdt.fill(1, 0, 0, 1)
                mjdt.fontSize(8 * scale)
                mjdt.textBox(
                    f"{int(transformIntance['tcenterx'])} {int(transformIntance['tcentery'])}",
                    ((tx - 30 * scale, ty - 30 * scale, 60 * scale,
                      20 * scale)),
                    align="center")
                mjdt.restore()
                mjdt.fill(0, .8, .8, .5)

            # for c in atomicInstance:
            #     if c.clockwise:
            #         mjdt.stroke(1, 0, 0, 1)
            #         mjdt.strokeWidth(2*scale)
            mjdt.save()
            # mjdt.drawGlyph(atomicInstance.getTransformedGlyph(round = self.RCJKI.roundToGrid))
            mjdt.drawGlyph(atomicInstance)
            mjdt.restore()
            if customColor is None and view:
                if i != index:
                    self.drawIndexOfElements(i, atomicInstance, view)
                    if glyph.type == "characterGlyph":
                        response = self.RCJKI.currentFont.mysqlGlyphData.get(
                            glyph.name, False)
                        try:
                            if response:
                                for dc in response["made_of"]:
                                    if dc["name"] != glyph._deepComponents[
                                            i].name:
                                        continue
                                    char = getChar(dc["name"])
                                    if not char: continue
                                    txt = "%s/%s\nused at %s%s" % (
                                        len(dc["used_by"]),
                                        len(self.RCJKI.currentFont.
                                            deepComponents2Chars[char]),
                                        round(
                                            (len(dc["used_by"]) /
                                             len(self.RCJKI.currentFont.
                                                 deepComponents2Chars[char])) *
                                            100), "%")
                                    x, y = atomicInstance[0].points[
                                        0].x, atomicInstance[0].points[0].y
                                    mjdt.fill(1, 0, 1, 1)
                                    mjdt.fontSize(10 * scale)
                                    mjdt.text(txt, (x, y - 30 * scale))
                        except Exception as e:
                            pass
            index = i
        if customColor is None:
            mjdt.fill(customColor)
        else:
            mjdt.fill(*customColor)

        mjdt.drawGlyph(glyph)
        mjdt.restore()

        for c in glyph.flatComponents:
            if self.RCJKI.currentFont[c.baseGlyph].type == "atomicElement":
                mjdt.drawGlyph(
                    self.roundGlyph(self.RCJKI.currentFont[c.baseGlyph]))
            else:
                # self.RCJKI.currentFont[c.baseGlyph].preview.computeDeepComponents(update = False)
                self.drawAxisPreview(self.RCJKI.currentFont[c.baseGlyph],
                                     flatComponentColor, scale, customColor,
                                     view)
    def draw(self):
        w = self.w.c.width()
        h = self.w.c.height()
        m = 130
        center = w * .5, h * .5
        d = self.dotSize
        r = min(.5 * (h - 2 * m), .5 * (w - 2 * m))
        if self.pointer is None:
            self.pointer = center

        a1 = self.orientation * math.pi
        a2 = a1 + 2 / 3 * math.pi
        a3 = a1 - 2 / 3 * math.pi
        self.p1 = p1 = center[0] + (r * math.sin(a1)), center[1] + (
            r * math.cos(a1))
        self.p2 = p2 = center[0] + (r * math.sin(a2)), center[1] + (
            r * math.cos(a2))
        self.p3 = p3 = center[0] + (r * math.sin(a3)), center[1] + (
            r * math.cos(a3))

        self.snapped = None
        if self.closeToPoint(self.p1, self.pointer):
            self.pointer = self.p1
            self.snapped = 0
        if self.closeToPoint(self.p2, self.pointer):
            self.pointer = self.p2
            self.snapped = 1
        if self.closeToPoint(self.p3, self.pointer):
            self.pointer = self.p3
            self.snapped = 2

        p1d = p1[0] - .5 * d, p1[1] - .5 * d, d, d
        p2d = p2[0] - .5 * d, p2[1] - .5 * d, d, d
        p3d = p3[0] - .5 * d, p3[1] - .5 * d, d, d

        ctx.save()
        ctx.stroke(.8, .8, .7)
        ctx.strokeWidth(.4)
        ctx.strokeWidth(.8)
        ctx.line(p1, p2)
        ctx.line(p2, p3)
        ctx.line(p3, p1)

        if self.pointer is not None:
            ctx.line(p1, self.pointer)
            ctx.line(p2, self.pointer)
            ctx.line(p3, self.pointer)

        ctx.stroke(None)
        ctx.fill(0)
        ctx.oval(*p1d)
        ctx.oval(*p2d)
        ctx.oval(*p3d)

        g1, g2, g3 = self.glyphs
        if g1 is not None:
            ctx.save()
            ctx.translate(p1[0], p1[1])
            ctx.scale(self.glyphScale)
            ctx.translate(100, 0)
            ctx.drawGlyph(g1)
            ctx.restore()
        if g2 is not None:
            ctx.save()
            ctx.translate(p2[0], p2[1])
            ctx.scale(self.glyphScale)
            ctx.translate(100, 0)
            ctx.drawGlyph(g2)
            ctx.restore()
        if g3 is not None:
            ctx.save()
            ctx.translate(p3[0], p3[1])
            ctx.scale(self.glyphScale)
            ctx.translate(100, 0)
            ctx.drawGlyph(g3)
            ctx.restore()

        if self.pointer:
            ctx.save()
            ctx.fill(1, 0, 0)
            ctx.stroke(None)
            d = 10
            ctx.oval(self.pointer[0] - .5 * d, self.pointer[1] - .5 * d, d, d)

            f1, f2, f3 = ip(p1, p2, p3, self.pointer)
            self._factors = f1, f2, f3
            r = None
            if self.mGlyphs is not None:
                if None not in self.mGlyphs:
                    try:
                        self.result = r = f1 * self.mGlyphs[
                            0] + f2 * self.mGlyphs[1] + f3 * self.mGlyphs[2]
                    except IndexError or TypeError:
                        print("Sorry, these glyphs can't interpolate..")
                    if r:
                        ctx.save()
                        ctx.translate(self.pointer[0], self.pointer[1])
                        ctx.scale(self.glyphScale)
                        ctx.translate(100, 0)
                        g = RGlyph()
                        g.fromMathGlyph(r)
                        ctx.drawGlyph(g)

                        t = "{:02.2f}, {:02.2f}, {:02.2f}".format(f1, f2, f3)
                        ctx.font("Menlo-Regular")
                        ctx.fontSize(6 / self.glyphScale)
                        ctx.text(t, (0, -200))
                        ctx.restore()
            ctx.restore()
        ctx.restore()
Exemple #18
0
    def _drawGlyphOutlinesFromGroups(self, aPair, kerningReference,
                                     correction):
        prevGlyphName, eachGlyphName = aPair
        if kerningReference is not None:
            lftReference, rgtReference = kerningReference
        else:
            lftReference = whichGroup(prevGlyphName, 'left', self.fontObj)
            rgtReference = whichGroup(eachGlyphName, 'right', self.fontObj)

        prevGlyph, eachGlyph = self.fontObj[prevGlyphName], self.fontObj[
            eachGlyphName]
        reverseScalingFactor = 1 / (
            self.ctrlHeight /
            (self.canvasScalingFactor * self.fontObj.info.unitsPerEm))

        # _L__ group
        if lftReference:
            if lftReference.startswith('@MMK_L_'):
                dt.save()
                dt.fill(*LAYERED_GLYPHS_COLOR)
                groupContent = self.fontObj.groups[lftReference]
                if len(groupContent) > 1:
                    for eachGroupSibling in groupContent:
                        if eachGroupSibling != prevGlyphName:
                            glyphToDisplay = self.fontObj[eachGroupSibling]
                            dt.save()
                            dt.translate(
                                -glyphToDisplay.width, 0
                            )  # back, according to his width, otherwise it does not coincide
                            dt.drawGlyph(glyphToDisplay)
                            dt.restore()

                dt.fill(*BLACK)  # caption
                dt.translate(-prevGlyph.width,
                             0)  # we need a caption in the right place
                dt.font(SYSTEM_FONT_NAME)
                dt.fontSize(GROUP_NAME_BODY_SIZE * reverseScalingFactor)
                textWidth, textHeight = dt.textSize(lftReference)
                dt.text(lftReference,
                        (glyphToDisplay.width / 2. - textWidth / 2.,
                         -GROUP_NAME_BODY_SIZE * reverseScalingFactor * 2))
                dt.restore()

        # _R__ group
        if rgtReference:
            if rgtReference.startswith('@MMK_R_'):
                dt.save()
                dt.translate(correction, 0)
                dt.fill(*LAYERED_GLYPHS_COLOR)
                groupContent = self.fontObj.groups[rgtReference]

                if len(groupContent) > 1:
                    for eachGroupSibling in groupContent:
                        if eachGroupSibling != eachGlyphName:
                            glyphToDisplay = self.fontObj[eachGroupSibling]
                            dt.drawGlyph(glyphToDisplay)

                dt.fill(*BLACK)
                dt.font(SYSTEM_FONT_NAME)
                dt.fontSize(GROUP_NAME_BODY_SIZE * reverseScalingFactor)
                textWidth, textHeight = dt.textSize(rgtReference)
                dt.text(rgtReference,
                        (glyphToDisplay.width / 2. - textWidth / 2.,
                         -GROUP_NAME_BODY_SIZE * reverseScalingFactor * 2))
                dt.restore()