为 Tkinter 修改工具提示 class

Question

我想使用 crxguy52 中提议的 class 在我用 Tkinter 创建的 GUI 中显示工具提示。但是，我想改变一件小事。在他的 class 中，工具提示的宽度是预定义的 (self.wraplength = 180)。因为我想在我的应用程序中创建许多工具提示，所以宽度 wraplength 应该是可变的。所以每次使用

创建工具提示

CreateToolTip(widget_name,tooltip_width,"工具提示内容")

必须另外指定宽度。有人可以向我解释一下我必须在他的代码中更改什么才能实现这一点。

""" 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()

为 Tkinter 修改工具提示 class

Modify tooltips class for Tkinter

python

tkinter

tooltip