Add a stub for tkinter.filedialog and for the modules it imports (#2058)

stdlib/3/tkinter/commondialog.pyi

@@ -0,0 +1,8 @@
+from typing import Any, Mapping, Optional
+
+class Dialog:
+    command: Optional[Any] = ...
+    master: Optional[Any] = ...
+    options: Mapping[str, Any] = ...
+    def __init__(self, master: Optional[Any] = ..., **options) -> None: ...
+    def show(self, **options) -> Any: ...

stdlib/3/tkinter/dialog.pyi

@@ -0,0 +1,10 @@
+from typing import Any, Mapping, Optional
+from tkinter import Widget
+
+DIALOG_ICON: str
+
+class Dialog(Widget):
+    widgetName: str = ...
+    num: int = ...
+    def __init__(self, master: Optional[Any] = ..., cnf: Mapping[str, Any] = ..., **kw) -> None: ...
+    def destroy(self) -> None: ...

stdlib/3/tkinter/filedialog.pyi

@@ -0,0 +1,65 @@
+from typing import Any, Dict, Optional, Tuple
+from tkinter import Button, commondialog, Entry, Frame, Listbox, Scrollbar, Toplevel
+
+dialogstates: Dict[Any, Tuple[Any, Any]]
+
+class FileDialog:
+    title: str = ...
+    master: Any = ...
+    directory: Optional[Any] = ...
+    top: Toplevel = ...
+    botframe: Frame = ...
+    selection: Entry = ...
+    filter: Entry = ...
+    midframe: Entry = ...
+    filesbar: Scrollbar = ...
+    files: Listbox = ...
+    dirsbar: Scrollbar = ...
+    dirs: Listbox = ...
+    ok_button: Button = ...
+    filter_button: Button = ...
+    cancel_button: Button = ...
+    def __init__(self, master, title: Optional[Any] = ...) -> None: ...  # title is usually a str or None, but e.g. int doesn't raise en exception either
+    how: Optional[Any] = ...
+    def go(self, dir_or_file: Any = ..., pattern: str = ..., default: str = ..., key: Optional[Any] = ...): ...
+    def quit(self, how: Optional[Any] = ...) -> None: ...
+    def dirs_double_event(self, event) -> None: ...
+    def dirs_select_event(self, event) -> None: ...
+    def files_double_event(self, event) -> None: ...
+    def files_select_event(self, event) -> None: ...
+    def ok_event(self, event) -> None: ...
+    def ok_command(self) -> None: ...
+    def filter_command(self, event: Optional[Any] = ...) -> None: ...
+    def get_filter(self): ...
+    def get_selection(self): ...
+    def cancel_command(self, event: Optional[Any] = ...) -> None: ...
+    def set_filter(self, dir, pat) -> None: ...
+    def set_selection(self, file) -> None: ...
+
+class LoadFileDialog(FileDialog):
+    title: str = ...
+    def ok_command(self) -> None: ...
+
+class SaveFileDialog(FileDialog):
+    title: str = ...
+    def ok_command(self): ...
+
+class _Dialog(commondialog.Dialog): ...
+
+class Open(_Dialog):
+    command: str = ...
+
+class SaveAs(_Dialog):
+    command: str = ...
+
+class Directory(commondialog.Dialog):
+    command: str = ...
+
+def askopenfilename(**options): ...
+def asksaveasfilename(**options): ...
+def askopenfilenames(**options): ...
+def askopenfile(mode: str = ..., **options): ...
+def askopenfiles(mode: str = ..., **options): ...
+def asksaveasfile(mode: str = ..., **options): ...
+def askdirectory(**options): ...
+def test() -> None: ...