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"""
Tkinter GUI progressbar decorator for iterators.
Usage:
>>> from tqdm.tk import trange, tqdm
>>> for i in trange(10):
... ...
"""
import re
import sys
import tkinter
import tkinter.ttk as ttk
from warnings import warn
from .std import TqdmExperimentalWarning, TqdmWarning
from .std import tqdm as std_tqdm
__author__ = {"github.com/": ["richardsheridan", "casperdcl"]}
__all__ = ['tqdm_tk', 'ttkrange', 'tqdm', 'trange']
class tqdm_tk(std_tqdm): # pragma: no cover
"""
Experimental Tkinter GUI version of tqdm!
Note: Window interactivity suffers if `tqdm_tk` is not running within
a Tkinter mainloop and values are generated infrequently. In this case,
consider calling `tqdm_tk.refresh()` frequently in the Tk thread.
"""
# TODO: @classmethod: write()?
def __init__(self, *args, **kwargs):
"""
This class accepts the following parameters *in addition* to
the parameters accepted by `tqdm`.
Parameters
----------
grab : bool, optional
Grab the input across all windows of the process.
tk_parent : `tkinter.Wm`, optional
Parent Tk window.
cancel_callback : Callable, optional
Create a cancel button and set `cancel_callback` to be called
when the cancel or window close button is clicked.
"""
kwargs = kwargs.copy()
kwargs['gui'] = True
# convert disable = None to False
kwargs['disable'] = bool(kwargs.get('disable', False))
self._warn_leave = 'leave' in kwargs
grab = kwargs.pop('grab', False)
tk_parent = kwargs.pop('tk_parent', None)
self._cancel_callback = kwargs.pop('cancel_callback', None)
super(tqdm_tk, self).__init__(*args, **kwargs)
if self.disable:
return
if tk_parent is None: # Discover parent widget
try:
tk_parent = tkinter._default_root
except AttributeError:
raise AttributeError(
"`tk_parent` required when using `tkinter.NoDefaultRoot()`")
if tk_parent is None: # use new default root window as display
self._tk_window = tkinter.Tk()
else: # some other windows already exist
self._tk_window = tkinter.Toplevel()
else:
self._tk_window = tkinter.Toplevel(tk_parent)
warn("GUI is experimental/alpha", TqdmExperimentalWarning, stacklevel=2)
self._tk_dispatching = self._tk_dispatching_helper()
self._tk_window.protocol("WM_DELETE_WINDOW", self.cancel)
self._tk_window.wm_title(self.desc)
self._tk_window.wm_attributes("-topmost", 1)
self._tk_window.after(0, lambda: self._tk_window.wm_attributes("-topmost", 0))
self._tk_n_var = tkinter.DoubleVar(self._tk_window, value=0)
self._tk_text_var = tkinter.StringVar(self._tk_window)
pbar_frame = ttk.Frame(self._tk_window, padding=5)
pbar_frame.pack()
_tk_label = ttk.Label(pbar_frame, textvariable=self._tk_text_var,
wraplength=600, anchor="center", justify="center")
_tk_label.pack()
self._tk_pbar = ttk.Progressbar(
pbar_frame, variable=self._tk_n_var, length=450)
if self.total is not None:
self._tk_pbar.configure(maximum=self.total)
else:
self._tk_pbar.configure(mode="indeterminate")
self._tk_pbar.pack()
if self._cancel_callback is not None:
_tk_button = ttk.Button(pbar_frame, text="Cancel", command=self.cancel)
_tk_button.pack()
if grab:
self._tk_window.grab_set()
def close(self):
if self.disable:
return
self.disable = True
with self.get_lock():
self._instances.remove(self)
def _close():
self._tk_window.after('idle', self._tk_window.destroy)
if not self._tk_dispatching:
self._tk_window.update()
self._tk_window.protocol("WM_DELETE_WINDOW", _close)
# if leave is set but we are self-dispatching, the left window is
# totally unresponsive unless the user manually dispatches
if not self.leave:
_close()
elif not self._tk_dispatching:
if self._warn_leave:
warn("leave flag ignored if not in tkinter mainloop",
TqdmWarning, stacklevel=2)
_close()
def clear(self, *_, **__):
pass
def display(self, *_, **__):
self._tk_n_var.set(self.n)
d = self.format_dict
# remove {bar}
d['bar_format'] = (d['bar_format'] or "{l_bar}<bar/>{r_bar}").replace(
"{bar}", "<bar/>")
msg = self.format_meter(**d)
if '<bar/>' in msg:
msg = "".join(re.split(r'\|?<bar/>\|?', msg, maxsplit=1))
self._tk_text_var.set(msg)
if not self._tk_dispatching:
self._tk_window.update()
def set_description(self, desc=None, refresh=True):
self.set_description_str(desc, refresh)
def set_description_str(self, desc=None, refresh=True):
self.desc = desc
if not self.disable:
self._tk_window.wm_title(desc)
if refresh and not self._tk_dispatching:
self._tk_window.update()
def cancel(self):
"""
`cancel_callback()` followed by `close()`
when close/cancel buttons clicked.
"""
if self._cancel_callback is not None:
self._cancel_callback()
self.close()
def reset(self, total=None):
"""
Resets to 0 iterations for repeated use.
Parameters
----------
total : int or float, optional. Total to use for the new bar.
"""
if hasattr(self, '_tk_pbar'):
if total is None:
self._tk_pbar.configure(maximum=100, mode="indeterminate")
else:
self._tk_pbar.configure(maximum=total, mode="determinate")
super(tqdm_tk, self).reset(total=total)
@staticmethod
def _tk_dispatching_helper():
"""determine if Tkinter mainloop is dispatching events"""
codes = {tkinter.mainloop.__code__, tkinter.Misc.mainloop.__code__}
for frame in sys._current_frames().values():
while frame:
if frame.f_code in codes:
return True
frame = frame.f_back
return False
def ttkrange(*args, **kwargs):
"""Shortcut for `tqdm.tk.tqdm(range(*args), **kwargs)`."""
return tqdm_tk(range(*args), **kwargs)
# Aliases
tqdm = tqdm_tk
trange = ttkrange
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