誰能告訴我，在這個Python程序中我做錯了什么？我正在嘗試創建一個類似“畫圖”的應用程序，但它顯示錯誤。文件“E：\項目\新建文件夾\paint_new.py”，第 33 行，use_eraseractivate_button(eraser_button, eraser_mode=True)文件“E：\項目\新建文件夾\paint_new.py”，第 36 行，activate_buttonactive_button.config(relief=RAISED)未綁定本地錯誤：賦值前引用的局部變量“active_button”未定義名稱“eraser_on”from tkinter import *from tkinter.colorchooser import askcolorimport tkinter as tkDEFAULT_PEN_SIZE = 5.0DEFAULT_COLOR = 'black'def setup(): old_x = None old_y = None line_width = choose_size_button.get() color = DEFAULT_COLOR eraser_on = False active_button = pen_button c.bind('<B1-Motion>', paint) c.bind('<ButtonRelease-1>', reset)def use_pen(): activate_button(pen_button)def use_brush(): activate_button(brush_button)def choose_color(): eraser_on = False color = askcolor(color=color)[1]def use_eraser(): activate_button(eraser_button, eraser_mode=True)def activate_button(some_button, eraser_mode=False): active_button.config(relief=RAISED) some_button.config(relief=SUNKEN) active_button = some_button eraser_on = eraser_modedef paint(event): line_width = choose_size_button.get() paint_color = 'white' if eraser_on else color if old_x and old_y: c.create_line(old_x, old_y, event.x, event.y, width=line_width, fill=paint_color, capstyle=ROUND, smooth=TRUE, splinesteps=36) old_x = event.x old_y = event.ydef reset(event): old_x, old_y = None, Noneroot = tk.Tk()pen_button = Button(root, text='pen', command=use_pen)pen_button.grid(row=0, column=0)brush_button = Button(root, text='brush', command=use_brush)brush_button.grid(row=0, column=1)color_button = Button(root, text='color', command=choose_color)color_button.grid(row=0, column=2)eraser_button = Button(root, text='eraser', command=use_eraser)eraser_button.grid(row=0, column=3)
1 回答
慕村225694
TA貢獻1880條經驗 獲得超4個贊
明智的解決方案是使用sth。喜歡這個：
from tkinter import *
from tkinter.colorchooser import askcolor
import tkinter as tk
DEFAULT_PEN_SIZE = 5.0
DEFAULT_COLOR = 'black'
class ABC:
def setup(self):
self.old_x = None
self.old_y = None
self.line_width = self.choose_size_button.get()
self.color = DEFAULT_COLOR
self.eraser_on = False
self.active_button = self.pen_button
self.c.bind('<B1-Motion>', self.paint)
self.c.bind('<ButtonRelease-1>', self.reset)
def use_pen(self):
self.activate_button(self.pen_button)
def use_brush(self):
self.activate_button(self.brush_button)
def choose_color(self):
self.eraser_on = False
self.color = askcolor(color=self.color)[1]
def use_eraser(self):
self.activate_button(self.eraser_button, eraser_mode=True)
def activate_button(self, some_button, eraser_mode=False):
self.active_button.config(relief=RAISED)
some_button.config(relief=SUNKEN)
self.active_button = some_button
self.eraser_on = eraser_mode
def paint(self, event):
self.line_width = self.choose_size_button.get()
self.paint_color = 'white' if self.eraser_on else self.color
if self.old_x and self.old_y:
self.c.create_line(self.old_x, self.old_y, event.x, event.y,
width=self.line_width, fill=self.paint_color,
capstyle=ROUND, smooth=TRUE, splinesteps=36)
self.old_x = event.x
self.old_y = event.y
def reset(self, event):
self.old_x, self.old_y = None, None
def __init__(self):
self.root = tk.Tk()
self.pen_button = Button(self.root, text='pen', command=self.use_pen)
self.pen_button.grid(row=0, column=0)
self.brush_button = Button(self.root, text='brush', command=self.use_brush)
self.brush_button.grid(row=0, column=1)
self.color_button = Button(self.root, text='color', command=self.choose_color)
self.color_button.grid(row=0, column=2)
self.eraser_button = Button(self.root, text='eraser', command=self.use_eraser)
self.eraser_button.grid(row=0, column=3)
self.choose_size_button = Scale(self.root, from_=1, to=10, orient=HORIZONTAL)
self.choose_size_button.grid(row=0, column=4)
self.c = Canvas(self.root, bg='white', width=600, height=600)
self.c.grid(row=1, columnspan=5)
self.setup()
self.root.mainloop()
ABC()
學習簡單的 OOP 原則！希望對您有所幫助！
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