__version__ = "5.0"

# Version 5 8/26/2016
#     * update at bottom to fix MacOS issue causing askopenfile() to hang
#     * update takes an optional parameter specifying update rate
#     * Entry objects get focus when drawn
#     * __repr_ for all objects
#     * fixed offset problem in window, made canvas borderless

# Version 4.3 4/25/2014
#     * Fixed Image getPixel to work with Python 3.4, TK 8.6 (tuple type handling)
#     * Added interactive keyboard input (getKey and checkKey) to GraphWin
#     * Modified setCoords to cause redraw of current objects, thus
#       changing the view. This supports scrolling around via setCoords.
#
# Version 4.2 5/26/2011
#     * Modified Image to allow multiple undraws like other GraphicsObjects
# Version 4.1 12/29/2009
#     * Merged Pixmap and Image class. Old Pixmap removed, use Image.
# Version 4.0.1 10/08/2009
#     * Modified the autoflush on GraphWin to default to True
#     * Autoflush check on close, setBackground
#     * Fixed getMouse to flush pending clicks at entry
# Version 4.0 08/2009
#     * Reverted to non-threaded version. The advantages (robustness,
#         efficiency, ability to use with other Tk code, etc.) outweigh
#         the disadvantage that interactive use with IDLE is slightly more
#         cumbersome.
#     * Modified to run in either Python 2.x or 3.x (same file).
#     * Added Image.getPixmap()
#     * Added update() -- stand alone function to cause any pending
#           graphics changes to display.
#
# Version 3.4 10/16/07
#     Fixed GraphicsError to avoid "exploded" error messages.
# Version 3.3 8/8/06
#     Added checkMouse method to GraphWin
# Version 3.2.3
#     Fixed error in Polygon init spotted by Andrew Harrington
#     Fixed improper threading in Image constructor
# Version 3.2.2 5/30/05
#     Cleaned up handling of exceptions in Tk thread. The graphics package
#     now raises an exception if attempt is made to communicate with
#     a dead Tk thread.
# Version 3.2.1 5/22/05
#     Added shutdown function for tk thread to eliminate race-condition
#        error "chatter" when main thread terminates
#     Renamed various private globals with _
# Version 3.2 5/4/05
#     Added Pixmap object for simple image manipulation.
# Version 3.1 4/13/05
#     Improved the Tk thread communication so that most Tk calls
#        do not have to wait for synchonization with the Tk thread.
#        (see _tkCall and _tkExec)
# Version 3.0 12/30/04
#     Implemented Tk event loop in separate thread. Should now work
#        interactively with IDLE. Undocumented autoflush feature is
#        no longer necessary. Its default is now False (off). It may
#        be removed in a future version.
#     Better handling of errors regarding operations on windows that
#       have been closed.
#     Addition of an isClosed method to GraphWindow class.

# Version 2.2 8/26/04
#     Fixed cloning bug reported by Joseph Oldham.
#     Now implements deep copy of config info.
# Version 2.1 1/15/04
#     Added autoflush option to GraphWin. When True (default) updates on
#        the window are done after each action. This makes some graphics
#        intensive programs sluggish. Turning off autoflush causes updates
#        to happen during idle periods or when flush is called.
# Version 2.0
#     Updated Documentation
#     Made Polygon accept a list of Points in constructor
#     Made all drawing functions call TK update for easier animations
#          and to make the overall package work better with
#          Python 2.3 and IDLE 1.0 under Windows (still some issues).
#     Removed vestigial turtle graphics.
#     Added ability to configure font for Entry objects (analogous to Text)
#     Added setTextColor for Text as an alias of setFill
#     Changed to class-style exceptions
#     Fixed cloning of Text objects

# Version 1.6
#     Fixed Entry so StringVar uses _root as master, solves weird
#            interaction with shell in Idle
#     Fixed bug in setCoords. X and Y coordinates can increase in
#           "non-intuitive" direction.
#     Tweaked wm_protocol so window is not resizable and kill box closes.

# Version 1.5
#     Fixed bug in Entry. Can now define entry before creating a
#     GraphWin. All GraphWins are now toplevel windows and share
#     a fixed root (called _root).

# Version 1.4
#     Fixed Garbage collection of Tkinter images bug.
#     Added ability to set text atttributes.
#     Added Entry boxes.

import time, os, sys

try:  # import as appropriate for 2.x vs. 3.x
   import tkinter as tk
except:
   import Tkinter as tk


##########################################################################
# Module Exceptions

class GraphicsError(Exception):
    """Generic error class for graphics module exceptions."""
    pass

OBJ_ALREADY_DRAWN = "Object currently drawn"
UNSUPPORTED_METHOD = "Object doesn't support operation"
BAD_OPTION = "Illegal option value"

##########################################################################
# global variables and funtions

_root = tk.Tk()
_root.withdraw()

_update_lasttime = time.time()

def update(rate=None):
    global _update_lasttime
    if rate:
        now = time.time()
        pauseLength = 1/rate-(now-_update_lasttime)
        if pauseLength > 0:
            time.sleep(pauseLength)
            _update_lasttime = now + pauseLength
        else:
            _update_lasttime = now

    _root.update()

############################################################################
# Graphics classes start here
        
class GraphWin(tk.Canvas):

    """A GraphWin is a toplevel window for displaying graphics."""

    def __init__(self, title="Graphics Window",
                 width=200, height=200, autoflush=True):
        assert type(title) == type(""), "Title must be a string"
        master = tk.Toplevel(_root)
        master.protocol("WM_DELETE_WINDOW", self.close)
        tk.Canvas.__init__(self, master, width=width, height=height,
                           highlightthickness=0, bd=0)
        self.master.title(title)
        self.pack()
        master.resizable(0,0)
        self.foreground = "black"
        self.items = []
        self.mouseX = None
        self.mouseY = None
        self.bind("<Button-1>", self._onClick)
        self.bind_all("<Key>", self._onKey)
        self.height = int(height)
        self.width = int(width)
        self.autoflush = autoflush
        self._mouseCallback = None
        self.trans = None
        self.closed = False
        master.lift()
        self.lastKey = ""
        if autoflush: _root.update()

    def __repr__(self):
        if self.isClosed():
            return "<Closed GraphWin>"
        else:
            return "GraphWin('{}', {}, {})".format(self.master.title(),
                                             self.getWidth(),
                                             self.getHeight())

    def __str__(self):
        return repr(self)
     
    def __checkOpen(self):
        if self.closed:
            raise GraphicsError("window is closed")

    def _onKey(self, evnt):
        self.lastKey = evnt.keysym


    def setBackground(self, color):
        """Set background color of the window"""
        self.__checkOpen()
        self.config(bg=color)
        self.__autoflush()
        
    def setCoords(self, x1, y1, x2, y2):
        """Set coordinates of window to run from (x1,y1) in the
        lower-left corner to (x2,y2) in the upper-right corner."""
        self.trans = Transform(self.width, self.height, x1, y1, x2, y2)
        self.redraw()

    def close(self):
        """Close the window"""

        if self.closed: return
        self.closed = True
        self.master.destroy()
        self.__autoflush()


    def isClosed(self):
        return self.closed


    def isOpen(self):
        return not self.closed


    def __autoflush(self):
        if self.autoflush:
            _root.update()

    
    def plot(self, x, y, color="black"):
        """Set pixel (x,y) to the given color"""
        self.__checkOpen()
        xs,ys = self.toScreen(x,y)
        self.create_line(xs,ys,xs+1,ys, fill=color)
        self.__autoflush()
        
    def plotPixel(self, x, y, color="black"):
        """Set pixel raw (independent of window coordinates) pixel
        (x,y) to color"""
        self.__checkOpen()
        self.create_line(x,y,x+1,y, fill=color)
        self.__autoflush()
      
    def flush(self):
        """Update drawing to the window"""
        self.__checkOpen()
        self.update_idletasks()
        
    def getMouse(self):
        """Wait for mouse click and return Point object representing
        the click"""
        self.update()      # flush any prior clicks
        self.mouseX = None
        self.mouseY = None
        while self.mouseX == None or self.mouseY == None:
            self.update()
            if self.isClosed(): raise GraphicsError("getMouse in closed window")
            time.sleep(.1) # give up thread
        x,y = self.toWorld(self.mouseX, self.mouseY)
        self.mouseX = None
        self.mouseY = None
        return Point(x,y)

    def checkMouse(self):
        """Return last mouse click or None if mouse has
        not been clicked since last call"""
        if self.isClosed():
            raise GraphicsError("checkMouse in closed window")
        self.update()
        if self.mouseX != None and self.mouseY != None:
            x,y = self.toWorld(self.mouseX, self.mouseY)
            self.mouseX = None
            self.mouseY = None
            return Point(x,y)
        else:
            return None

    def getKey(self):
        """Wait for user to press a key and return it as a string."""
        self.lastKey = ""
        while self.lastKey == "":
            self.update()
            if self.isClosed(): raise GraphicsError("getKey in closed window")
            time.sleep(.1) # give up thread

        key = self.lastKey
        self.lastKey = ""
        return key

    def checkKey(self):
        """Return last key pressed or None if no key pressed since last call"""
        if self.isClosed():
            raise GraphicsError("checkKey in closed window")
        self.update()
        key = self.lastKey
        self.lastKey = ""
        return key
            
    def getHeight(self):
        """Return the height of the window"""
        return self.height
        
    def getWidth(self):
        """Return the width of the window"""
        return self.width
    
    def toScreen(self, x, y):
        trans = self.trans
        if trans:
            return self.trans.screen(x,y)
        else:
            return x,y
                      
    def toWorld(self, x, y):
        trans = self.trans
        if trans:
            return self.trans.world(x,y)
        else:
            return x,y
        
    def setMouseHandler(self, func):
        self._mouseCallback = func
        
    def _onClick(self, e):
        self.mouseX = e.x
        self.mouseY = e.y
        if self._mouseCallback:
            self._mouseCallback(Point(e.x, e.y))

    def addItem(self, item):
        self.items.append(item)

    def delItem(self, item):
        self.items.remove(item)

    def redraw(self):
        for item in self.items[:]:
            item.undraw()
            item.draw(self)
        self.update()
        
                      
class Transform:

    """Internal class for 2-D coordinate transformations"""
    
    def __init__(self, w, h, xlow, ylow, xhigh, yhigh):
        # w, h are width and height of window
        # (xlow,ylow) coordinates of lower-left [raw (0,h-1)]
        # (xhigh,yhigh) coordinates of upper-right [raw (w-1,0)]
        xspan = (xhigh-xlow)
        yspan = (yhigh-ylow)
        self.xbase = xlow
        self.ybase = yhigh
        self.xscale = xspan/float(w-1)
        self.yscale = yspan/float(h-1)
        
    def screen(self,x,y):
        # Returns x,y in screen (actually window) coordinates
        xs = (x-self.xbase) / self.xscale
        ys = (self.ybase-y) / self.yscale
        return int(xs+0.5),int(ys+0.5)
        
    def world(self,xs,ys):
        # Returns xs,ys in world coordinates
        x = xs*self.xscale + self.xbase
        y = self.ybase - ys*self.yscale
        return x,y


# Default values for various item configuration options. Only a subset of
#   keys may be present in the configuration dictionary for a given item
DEFAULT_CONFIG = {"fill":"",
      "outline":"black",
      "width":"1",
      "arrow":"none",
      "text":"",
      "justify":"center",
                  "font": ("helvetica", 12, "normal")}

class GraphicsObject:

    """Generic base class for all of the drawable objects"""
    # A subclass of GraphicsObject should override _draw and
    #   and _move methods.
    
    def __init__(self, options):
        # options is a list of strings indicating which options are
        # legal for this object.
        
        # When an object is drawn, canvas is set to the GraphWin(canvas)
        #    object where it is drawn and id is the TK identifier of the
        #    drawn shape.
        self.canvas = None
        self.id = None

        # config is the dictionary of configuration options for the widget.
        config = {}
        for option in options:
            config[option] = DEFAULT_CONFIG[option]
        self.config = config
        
    def setFill(self, color):
        """Set interior color to color"""
        self._reconfig("fill", color)
        
    def setOutline(self, color):
        """Set outline color to color"""
        self._reconfig("outline", color)
        
    def setWidth(self, width):
        """Set line weight to width"""
        self._reconfig("width", width)

    def draw(self, graphwin):

        """Draw the object in graphwin, which should be a GraphWin
        object.  A GraphicsObject may only be drawn into one
        window. Raises an error if attempt made to draw an object that
        is already visible."""

        if self.canvas and not self.canvas.isClosed(): raise GraphicsError(OBJ_ALREADY_DRAWN)
        if graphwin.isClosed(): raise GraphicsError("Can't draw to closed window")
        self.canvas = graphwin
        self.id = self._draw(graphwin, self.config)
        graphwin.addItem(self)
        if graphwin.autoflush:
            _root.update()
        return self

            
    def undraw(self):

        """Undraw the object (i.e. hide it). Returns silently if the
        object is not currently drawn."""
        
        if not self.canvas: return
        if not self.canvas.isClosed():
            self.canvas.delete(self.id)
            self.canvas.delItem(self)
            if self.canvas.autoflush:
                _root.update()
        self.canvas = None
        self.id = None


    def move(self, dx, dy):

        """move object dx units in x direction and dy units in y
        direction"""
        
        self._move(dx,dy)
        canvas = self.canvas
        if canvas and not canvas.isClosed():
            trans = canvas.trans
            if trans:
                x = dx/ trans.xscale 
                y = -dy / trans.yscale
            else:
                x = dx
                y = dy
            self.canvas.move(self.id, x, y)
            if canvas.autoflush:
                _root.update()
           
    def _reconfig(self, option, setting):
        # Internal method for changing configuration of the object
        # Raises an error if the option does not exist in the config
        #    dictionary for this object
        if option not in self.config:
            raise GraphicsError(UNSUPPORTED_METHOD)
        options = self.config
        options[option] = setting
        if self.canvas and not self.canvas.isClosed():
            self.canvas.itemconfig(self.id, options)
            if self.canvas.autoflush:
                _root.update()


    def _draw(self, canvas, options):
        """draws appropriate figure on canvas with options provided
        Returns Tk id of item drawn"""
        pass # must override in subclass


    def _move(self, dx, dy):
        """updates internal state of object to move it dx,dy units"""
        pass # must override in subclass

         
class Point(GraphicsObject):
    def __init__(self, x, y):
        GraphicsObject.__init__(self, ["outline", "fill"])
        self.setFill = self.setOutline
        self.x = float(x)
        self.y = float(y)

    def __repr__(self):
        return "Point({}, {})".format(self.x, self.y)
        
    def _draw(self, canvas, options):
        x,y = canvas.toScreen(self.x,self.y)
        return canvas.create_rectangle(x,y,x+1,y+1,options)
        
    def _move(self, dx, dy):
        self.x = self.x + dx
        self.y = self.y + dy
        
    def clone(self):
        other = Point(self.x,self.y)
        other.config = self.config.copy()
        return other
                
    def getX(self): return self.x
    def getY(self): return self.y

class _BBox(GraphicsObject):
    # Internal base class for objects represented by bounding box
    # (opposite corners) Line segment is a degenerate case.
    
    def __init__(self, p1, p2, options=["outline","width","fill"]):
        GraphicsObject.__init__(self, options)
        self.p1 = p1.clone()
        self.p2 = p2.clone()

    def _move(self, dx, dy):
        self.p1.x = self.p1.x + dx
        self.p1.y = self.p1.y + dy
        self.p2.x = self.p2.x + dx
        self.p2.y = self.p2.y  + dy
                
    def getP1(self): return self.p1.clone()

    def getP2(self): return self.p2.clone()
    
    def getCenter(self):
        p1 = self.p1
        p2 = self.p2
        return Point((p1.x+p2.x)/2.0, (p1.y+p2.y)/2.0)

    
class Rectangle(_BBox):
    
    def __init__(self, p1, p2):
        _BBox.__init__(self, p1, p2)

    def __repr__(self):
        return "Rectangle({}, {})".format(str(self.p1), str(self.p2))
    
    def _draw(self, canvas, options):
        p1 = self.p1
        p2 = self.p2
        x1,y1 = canvas.toScreen(p1.x,p1.y)
        x2,y2 = canvas.toScreen(p2.x,p2.y)
        return canvas.create_rectangle(x1,y1,x2,y2,options)
        
    def clone(self):
        other = Rectangle(self.p1, self.p2)
        other.config = self.config.copy()
        return other


class Oval(_BBox):
    
    def __init__(self, p1, p2):
        _BBox.__init__(self, p1, p2)

    def __repr__(self):
        return "Oval({}, {})".format(str(self.p1), str(self.p2))

        
    def clone(self):
        other = Oval(self.p1, self.p2)
        other.config = self.config.copy()
        return other
   
    def _draw(self, canvas, options):
        p1 = self.p1
        p2 = self.p2
        x1,y1 = canvas.toScreen(p1.x,p1.y)
        x2,y2 = canvas.toScreen(p2.x,p2.y)
        return canvas.create_oval(x1,y1,x2,y2,options)
    
class Circle(Oval):
    
    def __init__(self, center, radius):
        p1 = Point(center.x-radius, center.y-radius)
        p2 = Point(center.x+radius, center.y+radius)
        Oval.__init__(self, p1, p2)
        self.radius = radius

    def __repr__(self):
        return "Circle({}, {})".format(str(self.getCenter()), str(self.radius))
        
    def clone(self):
        other = Circle(self.getCenter(), self.radius)
        other.config = self.config.copy()
        return other
        
    def getRadius(self):
        return self.radius

                  
class Line(_BBox):
    
    def __init__(self, p1, p2):
        _BBox.__init__(self, p1, p2, ["arrow","fill","width"])
        self.setFill(DEFAULT_CONFIG['outline'])
        self.setOutline = self.setFill

    def __repr__(self):
        return "Line({}, {})".format(str(self.p1), str(self.p2))

    def clone(self):
        other = Line(self.p1, self.p2)
        other.config = self.config.copy()
        return other
  
    def _draw(self, canvas, options):
        p1 = self.p1
        p2 = self.p2
        x1,y1 = canvas.toScreen(p1.x,p1.y)
        x2,y2 = canvas.toScreen(p2.x,p2.y)
        return canvas.create_line(x1,y1,x2,y2,options)
        
    def setArrow(self, option):
        if not option in ["first","last","both","none"]:
            raise GraphicsError(BAD_OPTION)
        self._reconfig("arrow", option)
        

class Polygon(GraphicsObject):
    
    def __init__(self, *points):
        # if points passed as a list, extract it
        if len(points) == 1 and type(points[0]) == type([]):
            points = points[0]
        self.points = list(map(Point.clone, points))
        GraphicsObject.__init__(self, ["outline", "width", "fill"])

    def __repr__(self):
        return "Polygon"+str(tuple(p for p in self.points))
        
    def clone(self):
        other = Polygon(*self.points)
        other.config = self.config.copy()
        return other

    def getPoints(self):
        return list(map(Point.clone, self.points))

    def _move(self, dx, dy):
        for p in self.points:
            p.move(dx,dy)
   
    def _draw(self, canvas, options):
        args = [canvas]
        for p in self.points:
            x,y = canvas.toScreen(p.x,p.y)
            args.append(x)
            args.append(y)
        args.append(options)
        return GraphWin.create_polygon(*args) 

class Text(GraphicsObject):
    
    def __init__(self, p, text):
        GraphicsObject.__init__(self, ["justify","fill","text","font"])
        self.setText(text)
        self.anchor = p.clone()
        self.setFill(DEFAULT_CONFIG['outline'])
        self.setOutline = self.setFill

    def __repr__(self):
        return "Text({}, '{}')".format(self.anchor, self.getText())
    
    def _draw(self, canvas, options):
        p = self.anchor
        x,y = canvas.toScreen(p.x,p.y)
        return canvas.create_text(x,y,options)
        
    def _move(self, dx, dy):
        self.anchor.move(dx,dy)
        
    def clone(self):
        other = Text(self.anchor, self.config['text'])
        other.config = self.config.copy()
        return other

    def setText(self,text):
        self._reconfig("text", text)
        
    def getText(self):
        return self.config["text"]
            
    def getAnchor(self):
        return self.anchor.clone()

    def setFace(self, face):
        if face in ['helvetica','arial','courier','times roman']:
            f,s,b = self.config['font']
            self._reconfig("font",(face,s,b))
        else:
            raise GraphicsError(BAD_OPTION)

    def setSize(self, size):
        if 5 <= size <= 36:
            f,s,b = self.config['font']
            self._reconfig("font", (f,size,b))
        else:
            raise GraphicsError(BAD_OPTION)

    def setStyle(self, style):
        if style in ['bold','normal','italic', 'bold italic']:
            f,s,b = self.config['font']
            self._reconfig("font", (f,s,style))
        else:
            raise GraphicsError(BAD_OPTION)

    def setTextColor(self, color):
        self.setFill(color)


class Entry(GraphicsObject):

    def __init__(self, p, width):
        GraphicsObject.__init__(self, [])
        self.anchor = p.clone()
        #print self.anchor
        self.width = width
        self.text = tk.StringVar(_root)
        self.text.set("")
        self.fill = "gray"
        self.color = "black"
        self.font = DEFAULT_CONFIG['font']
        self.entry = None

    def __repr__(self):
        return "Entry({}, {})".format(self.anchor, self.width)

    def _draw(self, canvas, options):
        p = self.anchor
        x,y = canvas.toScreen(p.x,p.y)
        frm = tk.Frame(canvas.master)
        self.entry = tk.Entry(frm,
                              width=self.width,
                              textvariable=self.text,
                              bg = self.fill,
                              fg = self.color,
                              font=self.font)
        self.entry.pack()
        #self.setFill(self.fill)
        self.entry.focus_set()
        return canvas.create_window(x,y,window=frm)

    def getText(self):
        return self.text.get()

    def _move(self, dx, dy):
        self.anchor.move(dx,dy)

    def getAnchor(self):
        return self.anchor.clone()

    def clone(self):
        other = Entry(self.anchor, self.width)
        other.config = self.config.copy()
        other.text = tk.StringVar()
        other.text.set(self.text.get())
        other.fill = self.fill
        return other

    def setText(self, t):
        self.text.set(t)

            
    def setFill(self, color):
        self.fill = color
        if self.entry:
            self.entry.config(bg=color)

            
    def _setFontComponent(self, which, value):
        font = list(self.font)
        font[which] = value
        self.font = tuple(font)
        if self.entry:
            self.entry.config(font=self.font)


    def setFace(self, face):
        if face in ['helvetica','arial','courier','times roman']:
            self._setFontComponent(0, face)
        else:
            raise GraphicsError(BAD_OPTION)

    def setSize(self, size):
        if 5 <= size <= 36:
            self._setFontComponent(1,size)
        else:
            raise GraphicsError(BAD_OPTION)

    def setStyle(self, style):
        if style in ['bold','normal','italic', 'bold italic']:
            self._setFontComponent(2,style)
        else:
            raise GraphicsError(BAD_OPTION)

    def setTextColor(self, color):
        self.color=color
        if self.entry:
            self.entry.config(fg=color)


class Image(GraphicsObject):

    idCount = 0
    imageCache = {} # tk photoimages go here to avoid GC while drawn 
    
    def __init__(self, p, *pixmap):
        GraphicsObject.__init__(self, [])
        self.anchor = p.clone()
        self.imageId = Image.idCount
        Image.idCount = Image.idCount + 1
        if len(pixmap) == 1: # file name provided
            self.img = tk.PhotoImage(file=pixmap[0], master=_root)
        else: # width and height provided
            width, height = pixmap
            self.img = tk.PhotoImage(master=_root, width=width, height=height)

    def __repr__(self):
        return "Image({}, {}, {})".format(self.anchor, self.getWidth(), self.getHeight())
                
    def _draw(self, canvas, options):
        p = self.anchor
        x,y = canvas.toScreen(p.x,p.y)
        self.imageCache[self.imageId] = self.img # save a reference  
        return canvas.create_image(x,y,image=self.img)
    
    def _move(self, dx, dy):
        self.anchor.move(dx,dy)
        
    def undraw(self):
        try:
            del self.imageCache[self.imageId]  # allow gc of tk photoimage
        except KeyError:
            pass
        GraphicsObject.undraw(self)

    def getAnchor(self):
        return self.anchor.clone()
        
    def clone(self):
        other = Image(Point(0,0), 0, 0)
        other.img = self.img.copy()
        other.anchor = self.anchor.clone()
        other.config = self.config.copy()
        return other

    def getWidth(self):
        """Returns the width of the image in pixels"""
        return self.img.width() 

    def getHeight(self):
        """Returns the height of the image in pixels"""
        return self.img.height()

    def getPixel(self, x, y):
        """Returns a list [r,g,b] with the RGB color values for pixel (x,y)
        r,g,b are in range(256)

        """
        
        value = self.img.get(x,y) 
        if type(value) ==  type(0):
            return [value, value, value]
        elif type(value) == type((0,0,0)):
            return list(value)
        else:
            return list(map(int, value.split())) 

    def setPixel(self, x, y, color):
        """Sets pixel (x,y) to the given color
        
        """
        self.img.put("{" + color +"}", (x, y))
        

    def save(self, filename):
        """Saves the pixmap image to filename.
        The format for the save image is determined from the filname extension.

        """
        
        path, name = os.path.split(filename)
        ext = name.split(".")[-1]
        self.img.write( filename, format=ext)

        
def color_rgb(r,g,b):
    """r,g,b are intensities of red, green, and blue in range(256)
    Returns color specifier string for the resulting color"""
    return "#%02x%02x%02x" % (r,g,b)

def test():
    win = GraphWin()
    win.setCoords(0,0,10,10)
    t = Text(Point(5,5), "Centered Text")
    t.draw(win)
    p = Polygon(Point(1,1), Point(5,3), Point(2,7))
    p.draw(win)
    e = Entry(Point(5,6), 10)
    e.draw(win)
    win.getMouse()
    p.setFill("red")
    p.setOutline("blue")
    p.setWidth(2)
    s = ""
    for pt in p.getPoints():
        s = s + "(%0.1f,%0.1f) " % (pt.getX(), pt.getY())
    t.setText(e.getText())
    e.setFill("green")
    e.setText("Spam!")
    e.move(2,0)
    win.getMouse()
    p.move(2,3)
    s = ""
    for pt in p.getPoints():
        s = s + "(%0.1f,%0.1f) " % (pt.getX(), pt.getY())
    t.setText(s)
    win.getMouse()
    p.undraw()
    e.undraw()
    t.setStyle("bold")
    win.getMouse()
    t.setStyle("normal")
    win.getMouse()
    t.setStyle("italic")
    win.getMouse()
    t.setStyle("bold italic")
    win.getMouse()
    t.setSize(14)
    win.getMouse()
    t.setFace("arial")
    t.setSize(20)
    win.getMouse()
    win.close()

#MacOS fix 2
#tk.Toplevel(_root).destroy()

# MacOS fix 1
update()

if __name__ == "__main__":
    test()