| # |
| # An Introduction to Tkinter |
| # |
| # Copyright (c) 1997 by Fredrik Lundh |
| # |
| # This copyright applies to Dialog, askinteger, askfloat and asktring |
| # |
| # fredrik@pythonware.com |
| # http://www.pythonware.com |
| # |
| """This module handles dialog boxes. |
| |
| It contains the following public symbols: |
| |
| SimpleDialog -- A simple but flexible modal dialog box |
| |
| Dialog -- a base class for dialogs |
| |
| askinteger -- get an integer from the user |
| |
| askfloat -- get a float from the user |
| |
| askstring -- get a string from the user |
| """ |
| |
| import tkinter |
| from tkinter import Button, Label, Tk, Toplevel, TclError |
| from tkinter import _get_temp_root, _destroy_temp_root |
| from tkinter import messagebox |
| from tkinter import ttk |
| from tkinter.constants import * |
| import contextlib |
| |
| __all__ = ["SimpleDialog", "Dialog", "askinteger", "askfloat", "askstring"] |
| |
| |
| # The standard dialog icons, which tk::MessageBox draws with themed images |
| # instead of the classic monochrome bitmaps. |
| _ICON_IMAGES = { |
| 'error': '::tk::icons::error', |
| 'info': '::tk::icons::information', |
| 'question': '::tk::icons::question', |
| 'warning': '::tk::icons::warning', |
| } |
| |
| |
| # Based on the Tk ::tk_dialog procedure, themed like ::tk::MessageBox by |
| # default. |
| class SimpleDialog: |
| |
| def _widget(self, klass, master, **kw): |
| # Create a themed (ttk) or classic (tkinter) widget. |
| return getattr(ttk if self.use_ttk else tkinter, klass)(master, **kw) |
| |
| def __init__(self, master, |
| text='', buttons=[], default=None, cancel=None, |
| title=None, class_=None, *, bitmap=None, detail='', |
| use_ttk=True): |
| # Use the themed (ttk) widgets (modelled on tk::MessageBox) by default, |
| # or the classic Tk widgets (tk_dialog) if use_ttk is false. |
| self.use_ttk = use_ttk |
| |
| # 1. Create the top-level window and divide it into top |
| # and bottom parts. |
| |
| class_ = class_ or 'Dialog' |
| self.root = Toplevel(master, class_=class_) |
| # The default value of the title is space (" ") not the empty string |
| # because for some window managers, a |
| # w.title("") |
| # causes the window title to be w._name instead of the empty string. |
| self.root.title(title or ' ') |
| self.root.iconname(class_) |
| toplevel = master.winfo_toplevel() |
| if toplevel.winfo_viewable(): |
| self.root.wm_transient(toplevel) |
| _setup_dialog(self.root) |
| if self.use_ttk: |
| self.root.configure( |
| background=ttk.Style(self.root).lookup('.', 'background')) |
| |
| bot = self._widget('Frame', self.root, name='bot') |
| top = self._widget('Frame', self.root, name='top') |
| # The classic dialog (tk_dialog) gives its frames a raised border on |
| # X11; the themed one (tk::MessageBox) does not. |
| if not self.use_ttk and self.root._windowingsystem == 'x11': |
| bot.configure(relief=RAISED, bd=1) |
| top.configure(relief=RAISED, bd=1) |
| bot.pack(side=BOTTOM, fill=BOTH) |
| top.pack(side=TOP, fill=BOTH, expand=1) |
| bot.grid_anchor(CENTER) |
| |
| # 2. Fill the top part with bitmap and message (use the option |
| # database for -wraplength and -font so that they can be |
| # overridden by the caller). |
| |
| master.option_add(f'*{class_}.msg.wrapLength', '3i', 'widgetDefault') |
| master.option_add(f'*{class_}.msg.font', 'TkCaptionFont', 'widgetDefault') |
| master.option_add(f'*{class_}.dtl.wrapLength', '3i', 'widgetDefault') |
| master.option_add(f'*{class_}.dtl.font', 'TkDefaultFont', 'widgetDefault') |
| |
| # tk::MessageBox and tk_dialog pad the top part differently. |
| pad = '2m' if self.use_ttk else '3m' |
| |
| # The bitmap is packed first to claim the whole left side; the message |
| # and detail stack on its right, as in tk::MessageBox. |
| if bitmap: |
| if self.root._windowingsystem == 'aqua' and bitmap == 'error': |
| bitmap = 'stop' |
| image = _ICON_IMAGES.get(bitmap) if self.use_ttk else None |
| if image is not None and self.root.winfo_depth() >= 4: |
| # tk::MessageBox draws the standard icons with themed images. |
| self.bitmap = ttk.Label(self.root, name='bitmap', image=image) |
| else: |
| # ttk.Label has no -bitmap option, so use a classic label. |
| self.bitmap = Label(self.root, name='bitmap', bitmap=bitmap) |
| # The themed dialog anchors the icon to the top (like the bitmap's |
| # "nw" sticky in tk::MessageBox); the classic one centers it. |
| anchor = N if self.use_ttk else CENTER |
| self.bitmap.pack(in_=top, side=LEFT, anchor=anchor, |
| padx=pad, pady=pad) |
| |
| self.message = self._widget('Label', self.root, name='msg', |
| justify=LEFT, text=text) |
| self.detail = None |
| if self.use_ttk: |
| # tk::MessageBox anchors the message to the top-left corner. |
| self.message.configure(anchor=NW) |
| # The message expands to fill the space, unless there is a detail |
| # message below it which takes the extra space instead (cf. |
| # tk::MessageBox). |
| self.message.pack(in_=top, side=TOP, expand=not detail, fill=BOTH, |
| padx=pad, pady=pad) |
| if detail: |
| self.detail = self._widget('Label', self.root, name='dtl', |
| justify=LEFT, text=detail) |
| if self.use_ttk: |
| self.detail.configure(anchor=NW) |
| self.detail.pack(in_=top, side=TOP, expand=1, fill=BOTH, |
| padx=pad, pady=(0, pad)) |
| |
| self.frame = bot |
| self.num = default |
| self.cancel = cancel |
| self.default = default |
| |
| # 3. Create a row of buttons at the bottom of the dialog. Each entry |
| # of "buttons" is either a label, or a mapping of button options -- like |
| # the "[name ?-option value ...?]" button specs in tk::MessageBox. |
| |
| # tk::MessageBox and tk_dialog space the buttons differently. |
| padx, pady = ('3m', '2m') if self.use_ttk else ('7.5p', '3p') |
| self._buttons = [] |
| for i, but in enumerate(buttons): |
| opts = {'text': but} if isinstance(but, str) else dict(but) |
| b = self._widget('Button', self.root, name=f'button{i}', **opts) |
| # The dialog controls the command and the default ring, overriding |
| # anything set in the button options (cf. tk::MessageBox). |
| b.configure(command=(lambda self=self, i=i: self.done(i)), |
| default=ACTIVE if i == default else NORMAL) |
| # Alt + the underlined character (an "underline" button option) |
| # invokes the button (cf. tk::AmpWidget in tk::MessageBox). |
| b.bind('<<AltUnderlined>>', lambda e: e.widget.invoke()) |
| b.grid(in_=bot, column=i, row=0, sticky=EW, padx=padx, pady=pady) |
| # tk::MessageBox makes the buttons equal width; tk_dialog does not. |
| bot.grid_columnconfigure(i, uniform='buttons' if self.use_ttk else '') |
| # We boost the size of some Mac buttons for l&f |
| if self.root._windowingsystem == 'aqua': |
| if str(opts.get('text', '')).lower() in ('ok', 'cancel'): |
| bot.grid_columnconfigure(i, minsize=90) |
| b.grid_configure(pady=7) |
| self._buttons.append(b) |
| |
| # 4. Bind <Return> to invoke the focused button, or the default button |
| # if the focus is elsewhere. Unlike tk_dialog (which tracks the focus |
| # by rebinding <Return> on <<PrevWindow>>/<<NextWindow>>), this reads |
| # the live focus, like tk::MessageBox, so it also works with the mouse. |
| |
| def on_return(event): |
| if event.widget.winfo_class() in ('Button', 'TButton'): |
| event.widget.invoke() |
| else: |
| self.return_event(event) |
| self.root.bind('<Return>', on_return) |
| # Alt + an underlined character invokes the matching button (cf. |
| # ::tk::AltKeyInDialog, bound by tk::MessageBox). |
| self.root.bind('<Alt-Key>', self._alt_key) |
| # The default ring follows the keyboard focus among the buttons |
| # (cf. tk::MessageBox). |
| self.root.bind('<FocusIn>', lambda e: self._set_default(e.widget, ACTIVE)) |
| self.root.bind('<FocusOut>', lambda e: self._set_default(e.widget, NORMAL)) |
| |
| # 5. Bind <Destroy> to record the cancel index, in case the window is |
| # destroyed by something else (e.g. its parent being destroyed). |
| |
| def on_destroy(event): |
| self.num = cancel |
| self.root.quit() |
| self.root.bind('<Destroy>', on_destroy) |
| |
| self.root.protocol('WM_DELETE_WINDOW', self.wm_delete_window) |
| _place_window(self.root, master) |
| |
| def go(self): |
| self.root.wait_visibility() |
| if self.default is not None: |
| focus = self._buttons[self.default] |
| else: |
| focus = self.root |
| |
| with _temp_grab_focus(self.root, focus): |
| try: |
| self.root.mainloop() |
| finally: |
| try: |
| # It's possible that the window has already been destroyed, |
| # hence this "try/except". Delete the Destroy handler so that |
| # self.num doesn't get reset by it. |
| self.root.bind('<Destroy>', '') |
| except TclError: |
| pass |
| return self.num |
| |
| def return_event(self, event): |
| if self.default is None: |
| self.root.bell() |
| else: |
| self.done(self.default) |
| |
| def wm_delete_window(self): |
| if self.cancel is None: |
| self.root.bell() |
| else: |
| self.done(self.cancel) |
| |
| def done(self, num): |
| self.num = num |
| self.root.quit() |
| |
| def _alt_key(self, event): |
| # Invoke the button whose accelerator matches the Alt key. |
| target = _find_alt_key_target(self.root, event.char) |
| if target is not None: |
| target.event_generate('<<AltUnderlined>>') |
| |
| def _set_default(self, widget, state): |
| # Set a button's default ring. |
| if widget.winfo_class() in ('Button', 'TButton'): |
| widget.configure(default=state) |
| |
| |
| # A base class for custom dialogs, with a button box modelled on |
| # ::tk::MessageBox. |
| class Dialog(Toplevel): |
| |
| '''Class to open dialogs. |
| |
| This class is intended as a base class for custom dialogs |
| ''' |
| |
| def _widget(self, klass, master, **kw): |
| # Create a themed (ttk) or classic (tkinter) widget. |
| return getattr(ttk if self.use_ttk else tkinter, klass)(master, **kw) |
| |
| def _frame(self, name): |
| # The classic dialog (tk_dialog) gives its frames a raised border on |
| # X11; the themed one (tk::MessageBox) does not. |
| frame = self._widget('Frame', self, name=name) |
| if not self.use_ttk and self._windowingsystem == 'x11': |
| frame.configure(relief=RAISED, bd=1) |
| return frame |
| |
| def __init__(self, parent, title=None, *, use_ttk=False): |
| '''Initialize a dialog. |
| |
| Arguments: |
| |
| parent -- a parent window (the application window) |
| |
| title -- the dialog title |
| |
| use_ttk -- use the classic Tk widgets (the default), or the themed |
| (ttk) widgets if true |
| ''' |
| # Use the classic Tk widgets by default, for compatibility: the themed |
| # (ttk) widgets set a themed background that classic widgets added by a |
| # subclass in body() would not match. The query dialogs opt into ttk. |
| self.use_ttk = use_ttk |
| |
| master = parent |
| if master is None: |
| master = _get_temp_root() |
| |
| Toplevel.__init__(self, master, class_='Dialog') |
| |
| if self.use_ttk: |
| # Use a single background colour for the whole dialog so that it |
| # blends with the ttk widgets (cf. tk::MessageBox). |
| self.configure( |
| background=ttk.Style(self).lookup('.', 'background')) |
| |
| self.withdraw() # remain invisible for now |
| # If the parent is not viewable, don't |
| # make the child transient, or else it |
| # would be opened withdrawn |
| if parent is not None and parent.winfo_viewable(): |
| self.transient(parent) |
| |
| self.title(title or ' ') |
| self.iconname('Dialog') |
| |
| _setup_dialog(self) |
| |
| self.parent = parent |
| |
| self.result = None |
| |
| body = self._frame('top') |
| self.initial_focus = self.body(body) |
| body.pack(side=TOP, fill=BOTH, expand=1) |
| |
| self.buttonbox() |
| |
| if self.initial_focus is None: |
| self.initial_focus = self |
| |
| self.protocol("WM_DELETE_WINDOW", self.cancel) |
| |
| _place_window(self, parent) |
| |
| # wait for window to appear on screen before calling grab_set |
| self.wait_visibility() |
| # Dialog destroys itself in ok()/cancel(), so let _temp_grab_focus |
| # save/restore the focus and grab without destroying the window. |
| with _temp_grab_focus(self, self.initial_focus, destroy=False): |
| self.wait_window(self) |
| |
| def destroy(self): |
| '''Destroy the window''' |
| self.initial_focus = None |
| Toplevel.destroy(self) |
| _destroy_temp_root(self.master) |
| |
| # |
| # construction hooks |
| |
| def body(self, master): |
| '''create dialog body. |
| |
| return widget that should have initial focus. |
| This method should be overridden, and is called |
| by the __init__ method. |
| ''' |
| pass |
| |
| def buttonbox(self): |
| '''add standard button box. |
| |
| override if you do not want the standard buttons |
| ''' |
| |
| box = self._frame('bot') |
| |
| # tk::MessageBox and tk_dialog space the buttons differently. |
| padx, pady = ('3m', '2m') if self.use_ttk else ('7.5p', '3p') |
| for i, (name, label, command) in enumerate( |
| (('ok', '&OK', self.ok), ('cancel', '&Cancel', self.cancel))): |
| # Create a button with an accelerator key marked by "&" in the text |
| # (cf. tk::AmpWidget). |
| text, underline = _underline_ampersand(label) |
| b = self._widget('Button', self, name=name, text=text, |
| underline=underline, command=command, |
| default=ACTIVE if name == 'ok' else NORMAL) |
| b.bind('<<AltUnderlined>>', lambda e: e.widget.invoke()) |
| b.grid(in_=box, column=i, row=0, sticky=EW, padx=padx, pady=pady) |
| # tk::MessageBox makes the buttons equal width; tk_dialog does not. |
| box.grid_columnconfigure(i, uniform='buttons' if self.use_ttk else '') |
| if self._windowingsystem == 'aqua': |
| box.grid_columnconfigure(i, minsize=90) |
| b.grid_configure(pady=7) |
| |
| # Alt + an underlined character invokes the matching button (cf. |
| # ::tk::AltKeyInDialog, bound by tk::MessageBox). |
| self.bind('<Alt-Key>', self._alt_key) |
| # The default ring follows the keyboard focus among the buttons |
| # (cf. tk::MessageBox). |
| self.bind('<FocusIn>', lambda e: self._set_default(e.widget, ACTIVE)) |
| self.bind('<FocusOut>', lambda e: self._set_default(e.widget, NORMAL)) |
| self.bind('<Return>', self._return_event) |
| self.bind('<Escape>', self.cancel) |
| |
| box.pack(side=BOTTOM, fill=BOTH) |
| box.grid_anchor(CENTER) |
| |
| def _set_default(self, widget, state): |
| # Set a button's default ring. |
| if widget.winfo_class() in ('Button', 'TButton'): |
| widget.configure(default=state) |
| |
| def _return_event(self, event): |
| # Invoke the focused button, or accept the dialog if the focus is |
| # elsewhere (e.g. in an entry). |
| widget = event.widget |
| if widget.winfo_class() in ('Button', 'TButton'): |
| widget.invoke() |
| else: |
| self.ok() |
| |
| def _alt_key(self, event): |
| # Invoke the button whose accelerator matches the Alt key. |
| target = _find_alt_key_target(self, event.char) |
| if target is not None: |
| target.event_generate('<<AltUnderlined>>') |
| |
| # |
| # standard button semantics |
| |
| def ok(self, event=None): |
| |
| if not self.validate(): |
| self.initial_focus.focus_set() # put focus back |
| return |
| |
| self.withdraw() |
| self.update_idletasks() |
| |
| try: |
| self.apply() |
| finally: |
| self.cancel() |
| |
| def cancel(self, event=None): |
| self.destroy() |
| |
| # |
| # command hooks |
| |
| def validate(self): |
| '''validate the data |
| |
| This method is called automatically to validate the data before the |
| dialog is destroyed. By default, it always validates OK. |
| ''' |
| |
| return True # override |
| |
| def apply(self): |
| '''process the data |
| |
| This method is called automatically to process the data, *after* |
| the dialog is destroyed. By default, it does nothing. |
| ''' |
| |
| pass # override |
| |
| |
| # Place a toplevel window at the center of parent or screen |
| # This is a Python implementation of ::tk::PlaceWindow. |
| def _wm_dimension(w, command): |
| # tk::WMFrameWidth and tk::WMTitleHeight (added in Tk 9.1) return the size |
| # of the window manager decoration. They are 0 except in SDL2 builds of |
| # Tk, and are missing in older versions. |
| try: |
| return int(w.tk.call(command)) |
| except TclError: |
| return 0 |
| |
| |
| def _place_window(w, parent=None): |
| w.wm_withdraw() # Remain invisible while we figure out the geometry |
| w.update_idletasks() # Actualize geometry information |
| |
| screenwidth = w.winfo_screenwidth() |
| screenheight = w.winfo_screenheight() |
| minwidth = w.winfo_reqwidth() |
| minheight = w.winfo_reqheight() |
| maxwidth = w.winfo_vrootwidth() |
| maxheight = w.winfo_vrootheight() |
| # "wm geometry" operates in window manager coordinates and thus includes a |
| # possible decoration frame and the title bar. |
| framewidth = _wm_dimension(w, '::tk::WMFrameWidth') |
| titleheight = _wm_dimension(w, '::tk::WMTitleHeight') |
| constrain = False |
| if minwidth + 2*framewidth > screenwidth: |
| minwidth = screenwidth - 2*framewidth |
| constrain = True |
| if minheight + titleheight + framewidth > screenheight: |
| minheight = screenheight - titleheight - framewidth |
| constrain = True |
| |
| if parent is not None and parent.winfo_ismapped(): |
| # Center the window over the parent (which must be mapped). |
| x = parent.winfo_rootx() + (parent.winfo_width() - minwidth) // 2 |
| y = parent.winfo_rooty() + (parent.winfo_height() - minheight) // 2 |
| # Make sure that the window is on the screen and does not cover the |
| # window manager decoration. |
| vrootx = w.winfo_vrootx() |
| vrooty = w.winfo_vrooty() |
| x = min(x, vrootx + maxwidth - minwidth - framewidth) |
| x = max(x, vrootx + framewidth) |
| y = min(y, vrooty + maxheight - minheight - framewidth) |
| y = max(y, vrooty + titleheight) |
| if w._windowingsystem == 'aqua': |
| # Avoid the native menu bar which sits on top of everything. |
| y = max(y, 22 + titleheight) |
| else: |
| # Center the window on the screen. |
| x = (screenwidth - minwidth) // 2 |
| y = (screenheight - minheight) // 2 |
| |
| w.wm_maxsize(maxwidth, maxheight) |
| geometry = f'{minwidth}x{minheight}' if constrain else '' |
| geometry += '+%d+%d' % (x - framewidth, y - titleheight) |
| w.wm_geometry(geometry) |
| w.wm_deiconify() # Become visible at the desired location |
| |
| |
| def _underline_ampersand(text): |
| # Like tk::UnderlineAmpersand: "&&" is a literal "&"; a single "&" marks |
| # the following character as the underlined accelerator. Return the text |
| # without the markers and the index of the accelerator (-1 if none). |
| chars = [] |
| underline = -1 |
| i = 0 |
| while i < len(text): |
| if text[i] == '&': |
| if text[i+1:i+2] == '&': |
| chars.append('&') |
| i += 2 |
| continue |
| if underline < 0: |
| underline = len(chars) |
| else: |
| chars.append(text[i]) |
| i += 1 |
| return ''.join(chars), underline |
| |
| |
| def _find_alt_key_target(widget, char): |
| # Like tk::FindAltKeyTarget: find the widget whose underlined character |
| # matches CHAR, searching the widget and its descendants. |
| if widget.winfo_class() in ('Button', 'Checkbutton', 'Label', 'Radiobutton', |
| 'TButton', 'TCheckbutton', 'TLabel', |
| 'TRadiobutton'): |
| try: |
| under = int(widget.cget('underline')) |
| except (TclError, ValueError): |
| under = -1 |
| text = str(widget.cget('text')) |
| if 0 <= under < len(text) and char.lower() == text[under].lower(): |
| return widget |
| for child in widget.winfo_children(): |
| target = _find_alt_key_target(child, char) |
| if target is not None: |
| return target |
| return None |
| |
| |
| def _setup_dialog(w): |
| if w._windowingsystem == "aqua": |
| if w.info_patchlevel() >= (9, 1): |
| w.wm_attributes(stylemask='titled') |
| else: |
| w.tk.call('::tk::unsupported::MacWindowStyle', 'style', |
| w, 'moveableModal', '') |
| elif w._windowingsystem == "x11": |
| w.wm_attributes(type="dialog") |
| |
| # -------------------------------------------------------------------- |
| # convenience dialogues |
| |
| class _QueryDialog(Dialog): |
| |
| def __init__(self, title, prompt, |
| initialvalue=None, |
| minvalue = None, maxvalue = None, |
| parent = None, *, use_ttk=True): |
| |
| self.prompt = prompt |
| self.minvalue = minvalue |
| self.maxvalue = maxvalue |
| |
| self.initialvalue = initialvalue |
| |
| Dialog.__init__(self, parent, title, use_ttk=use_ttk) |
| |
| def destroy(self): |
| self.entry = None |
| Dialog.destroy(self) |
| |
| def body(self, master): |
| |
| # Wrap a long prompt, like tk::MessageBox wraps its message at 3 inches. |
| w = self._widget('Label', master, anchor=NW, text=self.prompt, |
| justify=LEFT, wraplength='3i') |
| w.grid(in_=master, padx='2m', pady='2m', sticky=NSEW) |
| |
| self.entry = self._widget('Entry', master, name='entry') |
| self.entry.grid(row=1, in_=master, padx='2m', pady=(0, '2m'), sticky=NSEW) |
| master.grid_rowconfigure(1, weight=1) |
| # The prompt and entry expand to the full width, like tk::MessageBox |
| # gives weight to its message column. |
| master.grid_columnconfigure(0, weight=1) |
| |
| if self.initialvalue is not None: |
| self.entry.insert(0, self.initialvalue) |
| self.entry.select_range(0, END) |
| |
| return self.entry |
| |
| def validate(self): |
| try: |
| result = self.getresult() |
| except ValueError: |
| messagebox.showwarning( |
| "Illegal value", |
| self.errormessage + "\nPlease try again", |
| parent = self |
| ) |
| return False |
| |
| if self.minvalue is not None and result < self.minvalue: |
| messagebox.showwarning( |
| "Too small", |
| "The allowed minimum value is %s. " |
| "Please try again." % self.minvalue, |
| parent = self |
| ) |
| return False |
| |
| if self.maxvalue is not None and result > self.maxvalue: |
| messagebox.showwarning( |
| "Too large", |
| "The allowed maximum value is %s. " |
| "Please try again." % self.maxvalue, |
| parent = self |
| ) |
| return False |
| |
| self.result = result |
| |
| return True |
| |
| |
| class _QueryInteger(_QueryDialog): |
| errormessage = "Not an integer." |
| |
| def getresult(self): |
| return self.getint(self.entry.get()) |
| |
| |
| def askinteger(title, prompt, **kw): |
| '''get an integer from the user |
| |
| Arguments: |
| |
| title -- the dialog title |
| prompt -- the label text |
| **kw -- see SimpleDialog class |
| |
| Return value is an integer |
| ''' |
| d = _QueryInteger(title, prompt, **kw) |
| return d.result |
| |
| |
| class _QueryFloat(_QueryDialog): |
| errormessage = "Not a floating-point value." |
| |
| def getresult(self): |
| return self.getdouble(self.entry.get()) |
| |
| |
| def askfloat(title, prompt, **kw): |
| '''get a float from the user |
| |
| Arguments: |
| |
| title -- the dialog title |
| prompt -- the label text |
| **kw -- see SimpleDialog class |
| |
| Return value is a float |
| ''' |
| d = _QueryFloat(title, prompt, **kw) |
| return d.result |
| |
| |
| class _QueryString(_QueryDialog): |
| def __init__(self, *args, **kw): |
| if "show" in kw: |
| self.__show = kw["show"] |
| del kw["show"] |
| else: |
| self.__show = None |
| _QueryDialog.__init__(self, *args, **kw) |
| |
| def body(self, master): |
| entry = _QueryDialog.body(self, master) |
| if self.__show is not None: |
| entry.configure(show=self.__show) |
| return entry |
| |
| def getresult(self): |
| return self.entry.get() |
| |
| |
| def askstring(title, prompt, **kw): |
| '''get a string from the user |
| |
| Arguments: |
| |
| title -- the dialog title |
| prompt -- the label text |
| **kw -- see SimpleDialog class |
| |
| Return value is a string |
| ''' |
| d = _QueryString(title, prompt, **kw) |
| return d.result |
| |
| |
| @contextlib.contextmanager |
| def _temp_grab_focus(grab, focus=None, destroy=True): |
| old_focus = grab.focus_get() |
| old_grab = grab.grab_current() |
| if old_grab is not None and old_grab.winfo_exists(): |
| old_status = old_grab.grab_status() |
| else: |
| old_status = None |
| # The "grab" command will fail if another application |
| # already holds the grab. So catch it. |
| try: |
| grab.grab_set() |
| except TclError: |
| pass |
| try: |
| if focus is not None and focus.winfo_exists(): |
| focus.focus_set() |
| |
| yield |
| |
| finally: |
| if old_focus is not None: |
| try: |
| old_focus.focus_set() |
| except TclError: |
| pass |
| try: |
| grab.grab_release() |
| except TclError: |
| pass |
| if destroy: |
| try: |
| grab.destroy() |
| except TclError: |
| pass |
| if (old_grab is not None and old_grab.winfo_exists() |
| and old_grab.winfo_ismapped()): |
| # The "grab" command will fail if another application |
| # already holds the grab. So catch it. |
| try: |
| if old_status == 'global': |
| old_grab.grab_set_global() |
| else: |
| old_grab.grab_set() |
| except TclError: |
| pass |
| |
| |
| if __name__ == '__main__': |
| |
| def test(): |
| root = Tk() |
| use_ttk = tkinter.BooleanVar(root, value=True) |
| |
| def test_dialog(): |
| d = SimpleDialog(root, |
| text="This is a test dialog. " |
| "Would this have been an actual dialog, " |
| "the buttons below would have been glowing " |
| "in soft pink light.\n" |
| "Do you believe this?", |
| buttons=[{'text': 'Yes', 'underline': 0}, |
| {'text': 'No', 'underline': 0}, |
| {'text': 'Cancel', 'underline': 0}], |
| default=0, |
| cancel=2, |
| title="Test Dialog", |
| bitmap='question', |
| detail="Alt+Y, Alt+N and Alt+C work too.", |
| use_ttk=use_ttk.get()) |
| print(d.go()) |
| |
| def test_integer(): |
| print(askinteger("Spam", "Egg count", initialvalue=12*12, |
| use_ttk=use_ttk.get())) |
| |
| def test_float(): |
| print(askfloat("Spam", "Egg weight\n(in tons)", minvalue=1, |
| maxvalue=100, use_ttk=use_ttk.get())) |
| |
| def test_string(): |
| print(askstring("Spam", "Egg label", use_ttk=use_ttk.get())) |
| |
| tkinter.Checkbutton(root, text='Use themed (ttk) widgets', |
| variable=use_ttk).pack(fill=X) |
| Button(root, text='SimpleDialog', command=test_dialog).pack(fill=X) |
| Button(root, text='askinteger', command=test_integer).pack(fill=X) |
| Button(root, text='askfloat', command=test_float).pack(fill=X) |
| Button(root, text='askstring', command=test_string).pack(fill=X) |
| Button(root, text='Quit', command=root.quit).pack(fill=X) |
| root.mainloop() |
| |
| test() |
