我在python shell中遇到这个错误：
File "C:\Users\\Desktop\MyPython\ArtemisGraphics1.py", line 619, in draw
self._buttons[i].draw(self._win)
File "C:\Users\\Desktop\MyPython\ArtemisGraphics1.py", line 435, in draw
self.rect.draw(win)
File "C:\Python27\zellegraphics.py", line 434, in draw
if self.canvas and not self.canvas.isClosed(): raise GraphicsError(OBJ_ALREADY_DRAWN)
GraphicsError: ('O', 'b', 'j', 'e', 'c', 't', ' ', 'c', 'u', 'r', 'r', 'e', 'n', 't', 'l', 'y', ' ', 'd', 'r', 'a', 'w', 'n')
这是代码，运行时，我收到错误：
self._x = Button(Point(50,100),20,20,'x')
self._square = ButtonSqr(Point(50,50),4,20,20,win)
self._square.draw()
self._x.draw(win)
if self._x.clicked:
self._square.undraw()
ZelleGraphics中有关错误的代码：
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)
if graphwin.autoflush:
_root.update()
以下是相关代码：
class ButtonSqr ():
def __init__(self, center, numberOfButtons, width, height, win):
self._win = win
x = center.getX()
y = center.getY()
self._numberOfButtons = numberOfButtons
self._reaction = None
labels = [None, None, None, None]
self._b1 = Button(center, width, height, win)
self._b2 = Button(zg.Point(x+width,y), width, height, win)
self._b3 = Button(zg.Point(x+width, y+height), width, height, win)
self._b4 = Button(zg.Point(x, y+height), width, height, win)
self._buttons = [self._b1,self._b2,self._b3,self._b4]
def draw(self):
for i in range(0, self._numberOfButtons):
self._buttons[i].draw(self._win)
def undraw(self):
for i in range(0, self._numberOfButtons):
self._buttons[i].undraw()
def setLabels(self, textList):
labels = [None, None, None, None]
for i in range(len(textList)):
labels[i] = textList[i]
self._b1.setLabel(labels[0])
self._b2.setLabel(labels[1])
self._b3.setLabel(labels[2])
self._b4.setLabel(labels[3])
def setTextColor(self, color):
self._b1.setTextColor(color)
self._b2.setTextColor(color)
self._b3.setTextColor(color)
self._b4.setTextColor(color)
def setFill(self, color):
self._b1.setFill(color)
self._b2.setFill(color)
self._b3.setFill(color)
self._b4.setFill(color)
def waitForClick(self):
clicked = False
while clicked == False:
if self._b1.clicked(self._win.getMouse()):
clicked = True
button = self._b1
elif self._b2.clicked(self._win.getMouse()):
clicked = True
button = self._b2
elif self._b3.clicked(self._win.getMouse()):
clicked = True
button = self._b3
elif self._b4.clicked(self._win.getMouse()):
clicked = True
button = self._b4
return button.getLabel()
def checkClick(self, point):
if self._b1.clicked(point):
self._reaction = self._b1.getLabel()
return True
elif self._b2.clicked(point):
self._reaction = self._b2.getLabel()
return True
elif self._b3.clicked(point):
self._reaction = self._b3.getLabel()
return True
elif self._b4.clicked(point):
self._reaction = self._b4.getLabel()
return True
else:
return False
def getReaction(self):
return self._reaction