修改Tkinter的工具提示类

Question

我想使用建议的crxguy52类在我的GUI中显示工具提示，这是我用Tkinter创建的。然而，我想改变一件小事。在他的类中，工具提示的宽度是预定义的(self.wrappelength=180(。由于我想在我的应用程序中创建许多工具提示，因此宽度和长度应该是可变的。所以每次使用创建工具提示时

CreateToolTip(小工具名称、工具提示宽度、工具提示内容(

必须另外指定宽度。有人能解释一下我必须在他的代码中更改什么才能实现这一点吗。

""" tk_ToolTip_class101.py
gives a Tkinter widget a tooltip as the mouse is above the widget
tested with Python27 and Python34  by  vegaseat  09sep2014
www.daniweb.com/programming/software-development/code/484591/a-tooltip-class-for-tkinter
Modified to include a delay time by Victor Zaccardo, 25mar16
"""
try:
# for Python2
import Tkinter as tk
except ImportError:
# for Python3
import tkinter as tk
class CreateToolTip(object):
"""
create a tooltip for a given widget
"""
def __init__(self, widget, text='widget info'):
self.waittime = 500     #miliseconds
self.wraplength = 180   #pixels
self.widget = widget
self.text = text
self.widget.bind("<Enter>", self.enter)
self.widget.bind("<Leave>", self.leave)
self.widget.bind("<ButtonPress>", self.leave)
self.id = None
self.tw = None
def enter(self, event=None):
self.schedule()
def leave(self, event=None):
self.unschedule()
self.hidetip()
def schedule(self):
self.unschedule()
self.id = self.widget.after(self.waittime, self.showtip)
def unschedule(self):
id = self.id
self.id = None
if id:
self.widget.after_cancel(id)
def showtip(self, event=None):
x = y = 0
x, y, cx, cy = self.widget.bbox("insert")
x += self.widget.winfo_rootx() + 25
y += self.widget.winfo_rooty() + 20
# creates a toplevel window
self.tw = tk.Toplevel(self.widget)
# Leaves only the label and removes the app window
self.tw.wm_overrideredirect(True)
self.tw.wm_geometry("+%d+%d" % (x, y))
label = tk.Label(self.tw, text=self.text, justify='left',
background="#ffffff", relief='solid', borderwidth=1,
wraplength = self.wraplength)
label.pack(ipadx=1)
def hidetip(self):
tw = self.tw
self.tw= None
if tw:
tw.destroy()
# testing ...
if __name__ == '__main__':
root = tk.Tk()
btn1 = tk.Button(root, text="button 1")
btn1.pack(padx=10, pady=5)
button1_ttp = CreateToolTip(btn1, 
'Neque porro quisquam est qui dolorem ipsum quia dolor sit amet, '
'consectetur, adipisci velit. Neque porro quisquam est qui dolorem ipsum '
'quia dolor sit amet, consectetur, adipisci velit. Neque porro quisquam '
'est qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit.')
btn2 = tk.Button(root, text="button 2")
btn2.pack(padx=10, pady=5)
button2_ttp = CreateToolTip(btn2, 
"First thing's first, I'm the realest. Drop this and let the whole world "
"feel it. And I'm still in the Murda Bizness. I could hold you down, like "
"I'm givin' lessons in  physics. You should want a bad Vic like this.")
root.mainloop()  

Answer 1

就像您在问题中所写的那样，向CreateToolTip.__init__方法添加一个tooltip_width参数，并使用它来设置self.wraplength而不是180。

class CreateToolTip(object):
"""
create a tooltip for a given widget
"""
def __init__(self, widget, tooltip_width=180, text='widget info'):
self.waittime = 500     #miliseconds
self.wraplength = tooltip_width   #pixels
...
# testing ...
if __name__ == '__main__':
root = tk.Tk()
btn1 = tk.Button(root, text="button 1")
btn1.pack(padx=10, pady=5)
button1_ttp = CreateToolTip(btn1, 180,
'Neque porro quisquam est qui dolorem ipsum quia dolor sit amet, '
'consectetur, adipisci velit. Neque porro quisquam est qui dolorem ipsum '
'quia dolor sit amet, consectetur, adipisci velit. Neque porro quisquam '
'est qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit.')
btn2 = tk.Button(root, text="button 2")
btn2.pack(padx=10, pady=5)
button2_ttp = CreateToolTip(btn2, 500,
"First thing's first, I'm the realest. Drop this and let the whole world "
"feel it. And I'm still in the Murda Bizness. I could hold you down, like "
"I'm givin' lessons in  physics. You should want a bad Vic like this.")
root.mainloop()