在关闭 tkinter python 之前平滑淡入窗口

Question

我用 tkinter 做了一个简单的工具提示并添加了淡入淡出效果，但是代码出现了问题：

import tkinter as tk
import time

class ToolTips():
    def __init__(self,widget,text,triggerkey='<Enter>',releasekey='<Leave>'):
        self.widget = widget
        self.text = text
        self.bg = '#ffffe0'
        self.widget.bind(triggerkey,self.add)
        self.widget.bind(releasekey,self.remove)
        self.widget.bind('<ButtonPress>',self.remove)
        
    def add(self,event):
        self.master = tk.Toplevel(bg=self.bg)
        self.master.geometry(f'+{event.x_root}+{event.y_root}')
        self.master.overrideredirect(1)
        self.master.attributes('-topmost',True)
        self.frame = tk.Frame(self.master,bg=self.bg,highlightbackground="black", highlightcolor="black", highlightthickness=1)
        self.frame.pack()
        self.label = tk.Label(self.frame,text=self.text,bg=self.bg,justify=tk.LEFT)
        self.label.pack(padx=1,pady=3)
    
    def remove(self,*args):
        alpha = self.master.attributes('-alpha')
        if alpha > 0:
            alpha -= 0.5
            self.master.attributes('-alpha',alpha)
            self.master.after(100,self.remove)
        else:
            self.master.destroy()

#USAGE OF CLASS
root = tk.Tk()

l = tk.Label(root,text='Hover',font=('hevletica',21))
l.pack()
l.focus_force()

obj = ToolTips(l,text='There is alot more to this? Are you curious?\nBla Bla...')

root.mainloop()

这里remove() 应该提供淡入淡出效果，但它不干净，有时如果您离开标签并输入标签的速度超过 100 毫秒，那么工具提示不会破坏并且会一直留在那里直到应用程序完全退出。那么是否有任何简单的方法（如果没有的话）来实现此工具提示的平滑淡入淡出。也请随时指出代码中的其他错误:)

答案here有淡入淡出效果，但是我的代码好像不能实现。

提前致谢：D

Answer 1

尝试使用after_cancel。 为提高效率，鼠标悬停该文本时无需每次创建Toplevel，只需将-alpha设置为0即可。

import tkinter as tk
import time


class ToolTips():
    def __init__(self, widget, text, triggerkey='<Enter>', releasekey='<Leave>'):
        self.widget = widget
        self.text = text
        self.bg = '#ffffe0'
        self.widget.bind(triggerkey, self.add)
        self.widget.bind(releasekey, self.remove)
        self.widget.bind('<ButtonPress>', self.remove)
        self.hide_status = None

        self.master = tk.Toplevel(bg=self.bg)
        self.master.overrideredirect(1)
        self.master.attributes('-topmost', True)
        self.frame = tk.Frame(self.master, bg=self.bg, highlightbackground="black", highlightcolor="black",
                              highlightthickness=1)
        self.frame.pack()
        self.label = tk.Label(self.frame, text=self.text, bg=self.bg, justify=tk.LEFT)
        self.label.pack(padx=1, pady=3)
        self.master.attributes('-alpha', 0)

    def add(self, event):
        self.master.attributes('-alpha', 1)
        self.master.geometry(f'+{event.x_root}+{event.y_root}')

    def remove(self, event, alpha=1):
        if alpha > 0:
            alpha -= 0.01
            self.master.attributes('-alpha', alpha)
            if self.hide_status:
                self.master.after_cancel(self.hide_status)
            self.hide_status = self.master.after(10, lambda : self.remove(event=None, alpha=alpha))
        else:
            self.master.attributes('-alpha', 0)


# USAGE OF CLASS
root = tk.Tk()

l = tk.Label(root, text='Hover', font=('hevletica', 21))
l.pack()
l.focus_force()

obj = ToolTips(l, text='There is alot more to this? Are you curious?\nBla Bla...')

root.mainloop()

Answer 2

您遇到的问题是您在确定最后一个被销毁之前创建了一个新的工具提示。因此，您的参考资料有时可能会丢失。为避免这种情况，您需要跟踪最近的并在制作新的之前将其销毁。

import tkinter as tk
import time

class ToolTips():
    def __init__(self,widget,text,triggerkey='<Enter>',releasekey='<Leave>'):
        self.widget = widget
        self.text = text
        self.bg = '#ffffe0'
        self.widget.bind(triggerkey,self.add)
        self.widget.bind(releasekey,self.remove)
        self.widget.bind('<ButtonPress>',self.remove)
        self.recent = None
        
    def add(self,event):
        if self.recent != None:
            self.recent.destroy()
        self.master = tk.Toplevel(bg=self.bg)
        self.master.geometry(f'+{event.x_root}+{event.y_root}')
        self.master.overrideredirect(1)
        self.master.attributes('-topmost',True)
        self.frame = tk.Frame(self.master,bg=self.bg,highlightbackground="black", highlightcolor="black", highlightthickness=1)
        self.frame.pack()
        self.label = tk.Label(self.frame,text=self.text,bg=self.bg,justify=tk.LEFT)
        self.label.pack(padx=1,pady=3)
        self.recent=self.master
    
    def remove(self,*args):
        alpha = self.master.attributes('-alpha')
        if alpha > 0:
            alpha -= 0.5
            self.master.attributes('-alpha',alpha)
            self.master.after(100,self.remove)
        else:
            self.master.destroy()

#USAGE OF CLASS
root = tk.Tk()

l = tk.Label(root,text='Hover',font=('hevletica',21))
l.pack()
l.focus_force()

obj = ToolTips(l,text='There is alot more to this? Are you curious?\nBla Bla...')

root.mainloop()