link graphics, turtle

global  xsize,
        ysize,
        fontsize

procedure main(args)
    if *args > 0 then xsize := ysize := numeric(args[1])

    /xsize := /ysize := 200
    WIN := WOpen("size=" || xsize || "," || ysize, "label=Clock", "resize=on") | stop("Fenster geht nicht auf!", image(xsize), " - ", image(ysize))
    ziffernblatt()

    TInit()

#    clocker := create((right("0" || (0 to 23), 2) || ":" || right("0" || (0 to 59), 2) || ":" || right("0" || (0 to 59), 2)))  # simul_clock()

    repeat
    {   write(&time)

        if *Pending(WIN) > 1 then
        {   while *Pending() > 0 do e := Event()
            ziffernblatt()
        }

        Fg("#CFB53B")
        FillCircle(xsize/2, ysize/2, xsize/2 * 0.81)
        Fg("black")

        clock := &clock #clock := @clocker
        sec  := clock[7:0]
        min  := clock[4:6]
        hour := clock[1:3]

        if fontsize > 7 then
        {   altfg := Fg()
            Fg("blue")
            altbg := Bg()
            Bg("black")

            if fh := open("/etc/timezone", "r") then
            {   timezone := read(fh)
                close(fh)
            }

            erase := TextWidth(clock)
            erase <:= TextWidth(&date)
            erase <:= TextWidth(timezone)

            EraseArea(xsize/2 - erase / 2, ysize * 7 / 8, erase, WAttrib("fheight"))
            DrawString(xsize/2 - TextWidth(clock) / 2,ysize * 7 / 8 + WAttrib("fheight") - WAttrib("descent"), clock)

            EraseArea(xsize/2 - erase / 2, ysize * 7 / 8 - WAttrib("fheight"), erase,WAttrib("fheight"))
            DrawString(xsize/2 - TextWidth(&date) / 2,ysize * 7 / 8 - WAttrib("fheight") + WAttrib("fheight") - WAttrib("descent"), &date)


            EraseArea(xsize/2 - erase / 2, ysize * 7 / 8 - 2 * WAttrib("fheight"), erase,WAttrib("fheight"))
            DrawString(xsize/2 - TextWidth(timezone) / 2,ysize * 7 / 8 - 2 * WAttrib("fheight") + WAttrib("fheight") - WAttrib("descent"), timezone)

            Bg(altbg)
            Fg(altfg)
        }

        draw_zeiger(hour, min, sec)

        Fg("#D4AF37")
        FillCircle(xsize/2, ysize/2, 5 * xsize / 400.0)
        Fg("black")
        WAttrib("linewidth=" || 2 * xsize / 400)

        DrawCircle(xsize/2, ysize/2, 5 * xsize / 400.0)

        WAttrib("linewidth=1")

        WFlush()
        delay(50)
    }
end

procedure ziffernblatt()
        xsize := WAttrib("width")
        ysize := WAttrib("height")
        if xsize < ysize then ysize := xsize
        if ysize < xsize then xsize := ysize

        EraseArea(0,0,WAttrib("width"),WAttrib("height"))

        Fg("#CFB53B")
        FillCircle(xsize/2, ysize/2, xsize/2)
        Fg("black")
        fontsize := fontsize := 30 * xsize / 800.0
        WAttrib("linewidth=1")

        every i := 1 to 60 do
        {   winkel := 6 * i / 180.0 * &pi
            TX(xsize/2)
            TY(ysize/2)
            THeading(i * 6)

            if i % 5 = 0 then
            {   laenge := 0.95
                if fontsize > 15 then
                {   Font("mono," || integer(fontsize) || ",bold")
                    WAttrib("linewidth=3")
                }
                if fontsize > 8 then
                {   Font("sans," || integer(fontsize))
                    WAttrib("linewidth=2")
                }

                if fontsize > 8 then DrawString(xsize/2 + 0.90 * xsize/2 * sin(winkel) - fontsize / 2, ysize/2 - 0.90 * ysize/2 * cos(winkel) + fontsize/2, (i/5)("I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX", "X", "XI", "XII"))
            }
            else
            {   laenge := 0.98
                if fontsize > 15 then WAttrib("linewidth=3")
                if fontsize >  8 then WAttrib("linewidth=2")
                if fontsize <  5 then WAttrib("linewidth=1")

            }
            if fontsize >= 5 then {TSkip(laenge * xsize/2); TDraw((0.99-laenge) * xsize / 2)}   #DrawLine(xsize/2 + laenge * xsize/2 * sin(winkel), ysize/2 - laenge * ysize/2 * cos(winkel), xsize/2 + 0.99 * xsize/2 * sin(winkel), ysize/2 - 0.99 * ysize/2 * cos(winkel))
            if fontsize < 5 then if i % 5 = 0 then
            {   WAttrib("linewidth=1")
                TSkip(laenge * xsize/2); TDraw((0.99-laenge) * xsize / 2)  #DrawLine(xsize/2 + laenge * xsize/2 * sin(winkel), ysize/2 - laenge * ysize/2 * cos(winkel), xsize/2 + 0.99 * xsize/2 * sin(winkel), ysize/2 - 0.99 * ysize/2 * cos(winkel))
            }
        }
        clock := &clock
        sec  := clock[7:0]
        min  := clock[4:6]
        hour := clock[1:3]

        #if fontsize > 7 then
        #{   EraseArea(10,0, TextWidth(clock),WAttrib("fheight"))
        #    DrawString(10,fontsize, clock)
        #}
        draw_zeiger(hour, min, sec)
end

procedure draw(zeiger, laenge, breite, winkel)
    TX(xsize/2); TY(ysize/2); THeading(winkel - 90)
    WAttrib("linewidth=" || breite)
    TDraw(laenge)
    if zeiger == ("h" | "m" | "s") then
    {
        TSkip((0.05 + breite / 250.0) * xsize / 5)
        WAttrib("linewidth=1")
        TFPoly((0.05 + breite / 250.0) * xsize,3)
    }
    if zeiger == ("h" | "m" | "s") then
    {   Fg("green yellow")
        TFPoly(0.04 * xsize, 3)
        Fg("black")
    }
    WAttrib("linewidth=" || breite)

    if zeiger == "r" then
    {   TSkip(0.025 * xsize)
        TCircle(0.05 * xsize)
    }
    if breite > 7 then
    {   Fg("green yellow")
        TX(xsize/2); TY(ysize/2); THeading(winkel -90)
        TSkip(laenge / 2)
        TFRect(laenge / 2, breite -5)
        Fg("black")
    }
end

procedure draw_zeiger(h, m, s)
    wh := 30 * ((h % 12) + m / 60.0 + s / 3600.0) #/ 180 * &pi
    wm := 6 * (m + s / 60.0) #/ 180.0 * &pi
    ws := 6 * s #/ 180.0 * &pi

    draw("h", xsize/2 * 0.45,20 * xsize / 800, wh) # Stundenzeiger
    draw("r", xsize/2 * 0.15,20 * xsize / 800, wh - 180)

    draw("m", xsize/2 * 0.60,12 * xsize / 800, wm) # Minutenzeiger
    draw("r", xsize/2 * 0.20,12 * xsize / 800, wm - 180)

    draw("s", xsize/2 * 0.70, 4 * xsize / 800, ws) # Sekundenzeiger
    draw("r", xsize/2 * 0.25, 8 * xsize / 800, ws - 180)
end