[英]Unable to change tkinter Canvas background color on mouse hover?
每當鼠標懸停在畫布上時,我都想更改其背景顏色。 有此代碼。 最小示例:
import tkinter as tk
class HoverCanvas(tk.Canvas):
def __init__(self, master, activebackground, **kw):
tk.Frame.__init__(self,master=master,**kw)
self.defaultBackground = self["background"]
self.activebackground = activebackground
self.bind("<Enter>", self.on_enter)
self.bind("<Leave>", self.on_leave)
def on_enter(self, e):
self.config(background=self.activebackground)
def on_leave(self, e):
self.config(background=self.defaultBackground)
root = tk.Tk()
root.geometry("1280x720")
canvas = HoverCanvas(root, 'red', bg='#212121', width=1280, height=720)
#canvas = tk.Canvas(root, bg='#212121', width=1280, height=720)
canvas.create_text(110, 15, fill="#304ffe", activefill='#6a1b9a', font="Times 14 bold", text="Soccer Data Scraper v1.0")
canvas.grid(row=0, column=0)
root.mainloop()
如果鼠標為空,則畫布的顏色將變為紅色(請參見注釋行)。 但是,如果我嘗試在畫布上添加文本或任何其他小部件,則該程序將停止工作並拋出一個神秘錯誤。
Traceback (most recent call last):
File "canvasbg.py", line 24, in <module>
canvas.create_text(110, 15, fill="#304ffe", activefill='#6a1b9a', font="Times 14 bold", text="Soccer Data Scraper v1.0")
File "C:\Program Files (x86)\Python37-32\lib\tkinter\__init__.py", line 2501, in create_text
return self._create('text', args, kw)
File "C:\Program Files (x86)\Python37-32\lib\tkinter\__init__.py", line 2477, in _create
*(args + self._options(cnf, kw))))
_tkinter.TclError: bad option "create": must be cget or configure
這是什么錯誤? 有什么辦法可以改變光標懸停時畫布的背景顏色,同時還可以包含其他小部件/文本?
任何幫助表示贊賞。 謝謝
您的課程繼承自tk.Canvas
class HoverCanvas(tk.Canvas):
但您調用tk.Frame
的__init__
方法
tk.Frame.__init__(self,master=master,**kw)
您應該改為調用tk.Canvas
的__init__
方法。
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