TTK笔记本选项卡关闭方法

Question

我有一个TTK笔记本，其中标签上有关闭按钮，类似于Internet浏览器选项卡具有关闭按钮，但我希望能够将自定义方法绑定到单个关闭按钮上因此，我可以显示一个提示，例如"您想在关闭之前保存"或"您确定要关闭此选项卡？"取决于关闭的标签。

我遇到的问题是，我不确定如何为单个按钮创建自定义关闭方法，就像可以使用tkmessagebox制作广义的是/否提示，我不确定如何创建特殊方法对于每个选项卡。

例如，表格将具有个性化的方法询问用户是否要保存所做的更改，然后调用适当的保存表单的方法，而一般选项卡可能没有与何时有关的方法完全关闭。

我当前使用的代码在我的标签上创建关闭按钮如下：

try:
    import Tkinter as tk
    import ttk
except ImportError:  # Python 3
    import tkinter as tk
    from tkinter import ttk
class CustomNotebook(ttk.Notebook):
    """A ttk Notebook with close buttons on each tab"""
    __initialized = False
    def __init__(self, *args, **kwargs):
        if not self.__initialized:
            self.__initialize_custom_style()
            self.__inititialized = True
        kwargs["style"] = "CustomNotebook"
        ttk.Notebook.__init__(self, *args, **kwargs)
        self._active = None
        self.bind("<ButtonPress-1>", self.on_close_press, True)
        self.bind("<ButtonRelease-1>", self.on_close_release)
    def on_close_press(self, event):
        """Called when the button is pressed over the close button"""
        element = self.identify(event.x, event.y)
        if "close" in element:
            index = self.index("@%d,%d" % (event.x, event.y))
            self.state(['pressed'])
            self._active = index
    def on_close_release(self, event):
        """Called when the button is released over the close button"""
        if not self.instate(['pressed']):
            return
        element =  self.identify(event.x, event.y)
        index = self.index("@%d,%d" % (event.x, event.y))
        if "close" in element and self._active == index:
            self.forget(index)
            self.event_generate("<<NotebookTabClosed>>")
        self.state(["!pressed"])
        self._active = None
    def __initialize_custom_style(self):
        style = ttk.Style()
        self.images = (
            tk.PhotoImage("img_close", data='''
            R0lGODlhCAAIAMIBAAAAADs7O4+Pj9nZ2Ts7Ozs7Ozs7Ozs7OyH+EUNyZWF0ZWQg
            d2l0aCBHSU1QACH5BAEKAAQALAAAAAAIAAgAAAMVGDBEA0qNJyGw7AmxmuaZhWEU
            5kEJADs=
            '''),
            tk.PhotoImage("img_closeactive", data='''
            R0lGODlhCAAIAMIEAAAAAP/SAP/bNNnZ2cbGxsbGxsbGxsbGxiH5BAEKAAQALAAA
            AAAIAAgAAAMVGDBEA0qNJyGw7AmxmuaZhWEU5kEJADs=
            '''),
            tk.PhotoImage("img_closepressed", data='''
            R0lGODlhCAAIAMIEAAAAAOUqKv9mZtnZ2Ts7Ozs7Ozs7Ozs7OyH+EUNyZWF0ZWQg
            d2l0aCBHSU1QACH5BAEKAAQALAAAAAAIAAgAAAMVGDBEA0qNJyGw7AmxmuaZhWEU
            5kEJADs=
        ''')
    )
        style.element_create("close", "image", "img_close",
                        ("active", "pressed", "!disabled", "img_closepressed"),
                        ("active", "!disabled", "img_closeactive"), border=8, sticky='')
        style.layout("CustomNotebook", [("CustomNotebook.client", {"sticky": "nswe"})])
        style.layout("CustomNotebook.Tab", [
        ("CustomNotebook.tab", {
            "sticky": "nswe", 
            "children": [
                ("CustomNotebook.padding", {
                    "side": "top", 
                    "sticky": "nswe",
                    "children": [
                        ("CustomNotebook.focus", {
                            "side": "top", 
                            "sticky": "nswe",
                            "children": [
                                ("CustomNotebook.label", {"side": "left", "sticky": ''}),
                                ("CustomNotebook.close", {"side": "left", "sticky": ''}),
                            ]
                    })
                ]
            })
        ]
    })
])
if __name__ == "__main__":
    root = tk.Tk()
    notebook = CustomNotebook(width=200, height=200)
    notebook.pack(side="top", fill="both", expand=True)
    for color in ("red", "orange", "green", "blue", "violet"):
        frame = tk.Frame(notebook, background=color)
        notebook.add(frame, text=color)
    root.mainloop()

Answer 1

只需打开on_close_release内部的tkmessagebox，然后检查结果：

#make sure to use 
import tkMessageBox
#[...]
        # ask the question
        result = tkMessageBox.askyesno("Really?", "Really really?")
        # check result as well
        if "close" in element and self._active == index and result:
            self.forget(index)
            self.event_generate("<<NotebookTabClosed>>")