tkinter陷阱框架入口（后续）

Question

这个问题是Trapping Frame Entrance in tkinter的后续问题，@jasonharper提供了一个非常有用的答案

在下面的代码中，我将入口绑定到画布（self.c），以便将一些字段从显示模式切换到编辑模式。这对于textarea似乎很好，但对于menuarea却不行：我可以单击按钮来显示menuarea按钮，但是当鼠标移到实际菜单时，画布上的“Leave”事件被触发，因此我无法从菜单中进行选择。为原来的职位提供的解决方案似乎不适用于这里

from tkinter import *
from tkinter import ttk
class MainWindow(Frame):
    def __init__(self,master):
        super().__init__(master)
        self.master = master
        self.pack()
        self.edit = 0
        self.initUI()

    def initUI(self):
        self.c = Canvas(self, height = 100, width = 400,bg = "white")
        self.c.pack()
        self.c.bind('<Enter>', lambda *args: self.trigger(1))
        self.c.bind('<Leave>', lambda *args: self.trigger(0))
        self.textstring = StringVar()
        self.textstring.set("Day")
        self.textarea = TextArea(self.c,self.edit,self.textstring)
        self.textarea.display(2)
        self.menuarea = MenuArea(self.c,self.edit,self.textstring)
        self.menuarea.display(2)
        self.c.create_window(10,10,window = self.textarea,anchor = NW)
        self.c.create_window(200,10, window = self.menuarea, anchor = NW)
    def trigger(self,x):
        if x == 0:
            self.textarea.display(0)
            self.menuarea.display(0)
        elif x == 1:
            self.textarea.display(1)
            self.menuarea.display(1)
class TextArea(Frame):
    def __init__(self,master,active,textstr):
        super().__init__(master)
        self.master = master
        self.active = active
        self.textstr = textstr
        self.optionslist = ["GS","NR","JY"]
    def display(self,e):
        if e == 0:
            for child in self.winfo_children():
                child.destroy()
            L = Label(self,text = self.textstr.get())
            L.pack()
        elif e ==1:
            for child in self.winfo_children():
                child.destroy()
            E = Entry(self,textvariable = self.textstr)
            E.pack(anchor = S)
        elif e == 2:
            L = Label(self, text=self.textstr.get(), relief="flat")
            L.pack()

class MenuArea(Frame):
    def __init__(self,master,active,textstr):
        super().__init__(master)
        self.master = master
        self.textstr = textstr
        self.optionslist = ["GS", "NR", "JY"]
    def display(self,e):
        if e == 0:
            for child in self.winfo_children():
                child.destroy()
            L = Label(self,text = self.textstr.get())
            L.pack()
        elif e ==1:
            for child in self.winfo_children():
                child.destroy()
            E = OptionMenu(self,self.textstr,"Tu", "Wed")
            E.config(relief = "flat", width = 3)
            E.pack()
        elif e == 2:
            L = Label(self, text=self.textstr.get())
            L.pack()

root = Tk()
mainframe = MainWindow(root)
mainframe.pack()
root.mainloop()

Answer 1

我猜您正在监视<Leave>画布的self.c事件，因为您计划在最终应用程序中使用多个帧/画布

在这种情况下，您可以通过将小部件重新排列功能绑定到这些帧/画布的<Enter>事件来实现所需的效果：

# High-level parts of the GUI
self.c = Canvas(self, height=100, width=400, bg="white")
self.c.pack()
self.c2 = Canvas(self, height=100, width=400, bg="yellow")
self.c2.pack()

# Re-arrange the widgets when entering different parts of the GUI
self.c.bind('<Enter>', lambda *args: self.trigger(1))
self.c2.bind('<Enter>', lambda *args: self.trigger(0))