Tkinter 对话框
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"tkinter.simpledialog" --- 标准 Tkinter 输入对话框
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**源码:** Lib/tkinter/simpledialog.py

======================================================================

The "tkinter.simpledialog" module contains convenience classes and
functions for creating simple modal dialogs to get a value from the
user.

tkinter.simpledialog.askfloat(title, prompt, **kw)
tkinter.simpledialog.askinteger(title, prompt, **kw)
tkinter.simpledialog.askstring(title, prompt, **kw)

   以上三个函数提供给用户输入期望值的类型的对话框.

class tkinter.simpledialog.Dialog(parent, title=None)

   自定义对话框的基类.

      body(master)

         Override to construct the dialog's interface and return the
         widget that should have initial focus.

      buttonbox()

         加入 OK 和 Cancel 按钮的默认行为. 重写自定义按钮布局.


"tkinter.filedialog" --- 文件选择对话框.
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**源码:** Lib/tkinter/filedialog.py

======================================================================

The "tkinter.filedialog" module provides classes and factory functions
for creating file/directory selection windows.


原生 加载/保存 对话框.
----------------------

The following classes and functions provide file dialog windows that
combine a native look-and-feel with configuration options to customize
behaviour. The following keyword arguments are applicable to the
classes and functions listed below:

      *parent* - the window to place the dialog on top of

      *title* - the title of the window

      *initialdir* - the directory that the dialog starts in

      *initialfile* - the file selected upon opening of the dialog

      *filetypes* - a sequence of (label, pattern) tuples, '*' wildcard is allowed

      *defaultextension* - default extension to append to file (save dialogs)

      *multiple* - when true, selection of multiple items is allowed

**Static factory functions**

The below functions when called create a modal, native look-and-feel
dialog, wait for the user's selection, then return the selected
value(s) or "None" to the caller.

tkinter.filedialog.askopenfile(mode='r', **options)
tkinter.filedialog.askopenfiles(mode='r', **options)

   The above two functions create an "Open" dialog and return the
   opened file object(s) in read-only mode.

tkinter.filedialog.asksaveasfile(mode='w', **options)

   Create a "SaveAs" dialog and return a file object opened in write-
   only mode.

tkinter.filedialog.askopenfilename(**options)
tkinter.filedialog.askopenfilenames(**options)

   The above two functions create an "Open" dialog and return the
   selected filename(s) that correspond to existing file(s).

tkinter.filedialog.asksaveasfilename(**options)

   Create a "SaveAs" dialog and return the selected filename.

tkinter.filedialog.askdirectory(**options)

      提示用户选择一个目录.
      Additional keyword option:
         *mustexist* - determines if selection must be an existing directory.

class tkinter.filedialog.Open(master=None, **options)
class tkinter.filedialog.SaveAs(master=None, **options)

   The above two classes provide native dialog windows for saving and
   loading files.

**Convenience classes**

The below classes are used for creating file/directory windows from
scratch. These do not emulate the native look-and-feel of the
platform.

class tkinter.filedialog.Directory(master=None, **options)

   Create a dialog prompting the user to select a directory.

注解:

  The *FileDialog* class should be subclassed for custom event
  handling and behaviour.

class tkinter.filedialog.FileDialog(master, title=None)

   Create a basic file selection dialog.

   cancel_command(event=None)

      Trigger the termination of the dialog window.

   dirs_double_event(event)

      Event handler for double-click event on directory.

   dirs_select_event(event)

      Event handler for click event on directory.

   files_double_event(event)

      Event handler for double-click event on file.

   files_select_event(event)

      Event handler for single-click event on file.

   filter_command(event=None)

      以目录过滤文件.

   get_filter()

      获取当前使用的文件过滤器.

   get_selection()

      获取当前选择的项目.

   go(dir_or_file=os.curdir, pattern='*', default='', key=None)

      渲染对话和启动事件循环,

   ok_event(event)

      退出对话回到当前选择.

   quit(how=None)

      退出对话回到文件名, 如果有的话.

   set_filter(dir, pat)

      设置文件过滤器.

   set_selection(file)

      Update the current file selection to *file*.

class tkinter.filedialog.LoadFileDialog(master, title=None)

   A subclass of FileDialog that creates a dialog window for selecting
   an existing file.

   ok_command()

      Test that a file is provided and that the selection indicates an
      already existing file.

class tkinter.filedialog.SaveFileDialog(master, title=None)

   A subclass of FileDialog that creates a dialog window for selecting
   a destination file.

      ok_command()

         Test whether or not the selection points to a valid file that
         is not a directory. Confirmation is required if an already
         existing file is selected.


"tkinter.commondialog" --- 对话窗口模板
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**源码:** Lib/tkinter/commondialog.py

======================================================================

The "tkinter.commondialog" module provides the "Dialog" class that is
the base class for dialogs defined in other supporting modules.

class tkinter.commondialog.Dialog(master=None, **options)

   show(color=None, **options)

      渲染对话窗口.

参见: Modules "tkinter.messagebox", 读写文件
