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