Question

我目前正在使用Python 2.7在Tkinter制作扑克游戏的图形部分，但我现在无法重绘画布。出于某种原因，self.canvas.delete(ALL)不会删除我的按钮或背景图片标签。我在我的pack_forget()函数中尝试了redrawALL()，但这似乎也没有用。

from Tkinter import *

class PokerGame(object):
    def __init__(self):
        self.run()

    def run(self):
        self.root = Tk()
        self.root.title("PyPoker")
        self.width = 1280
        self.height = 720
        self.canvas = Canvas(self.root, width = self.width, height = self.height)
        self.canvas.pack()
        self.drawStartScreen()
        self.root.mainloop()

    def drawStartScreen(self): 
        self.bgImage = PhotoImage(file = 'startbg.gif')
        self.bgLabel = Label(self.root, image = self.bgImage)
        self.bgLabel.pack()
        self.bgLabel.place(x = 0, y = 0, relwidth = 1, relheight = 1)
        self.btnPlay = Button(self.root, text = "Play", command = self.playGame)
        self.btnInstructions = Button(self.root, text = "How To Play", command = self.showInstructions)
        self.btnPlay.pack()
        self.btnInstructions.pack()
        self.btnPlay.place(relheight = 0.1, relwidth = 0.1, relx = 0.5, rely = 0.4, anchor = CENTER)
        self.btnInstructions.place(relheight = 0.1, relwidth = 0.1, relx = 0.5, rely = 0.5, anchor = CENTER)
        return

    def playGame(self):
        self.redrawAll()
        return

    def showInstructions(self):
        self.redrawAll()
        return


    def redrawAll(self):
        print "trying to delete all"
        self.canvas.delete(ALL)
        self.btnPlay.pack_forget()
        self.btnInstructions.pack_forget()
        return

Answer 1

Canvas没有self.canvas.create_*()（http://infohost.nmt.edu/tcc/help/pubs/tkinter/web/canvas.html）

添加的元素

可能你想删除按钮。

请勿同时使用.pack()，.place()，.grid()。他们是三个不同的布局管理员。

使用.pack()或.place()或.grid()

您已使用.place()元素，因此必须使用.place_forget()

工作代码：

from Tkinter import *

class PokerGame(object):
    def __init__(self):
        self.run()

    def run(self):
        self.root = Tk()
        self.root.title("PyPoker")
        self.root.geometry("1280x720")
        #self.width = 1280
        #self.height = 720
        #self.canvas = Canvas(self.root, width = self.width, height = self.height)
        #self.canvas.pack()

        self.drawStartScreen()
        self.root.mainloop()

    def drawStartScreen(self): 
        self.bgImage = PhotoImage(file = 'startbg.gif')

        self.bgLabel = Label(self.root, image = self.bgImage)
        self.bgLabel.place(x = 0, y = 0, relwidth = 1, relheight = 1)

        self.btnPlay = Button(self.root, text = "Play", command = self.playGame)
        self.btnPlay.place(relheight = 0.1, relwidth = 0.1, relx = 0.5, rely = 0.4, anchor = CENTER)

        self.btnInstructions = Button(self.root, text = "How To Play", command = self.showInstructions)
        self.btnInstructions.place(relheight = 0.1, relwidth = 0.1, relx = 0.5, rely = 0.5, anchor = CENTER)

    def playGame(self):
        self.redrawAll()

    def showInstructions(self):
        self.redrawAll()

    def redrawAll(self):
        print "trying to delete all"
        self.btnPlay.place_forget()
        self.btnInstructions.place_forget()
        self.bgLabel.place_forget()

PokerGame()

canvas.delete（ALL）不起作用

1 个答案: