\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5×\D6?\BDê\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2€ \00 $\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4ê\E9\F2á\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// File Manager

File Manager

Path: /opt/alt/python37/lib64/python3.7/idlelib/

Viewing File: percolator.py

from idlelib.delegator import Delegator
from idlelib.redirector import WidgetRedirector


class Percolator:

    def __init__(self, text):
        # XXX would be nice to inherit from Delegator
        self.text = text
        self.redir = WidgetRedirector(text)
        self.top = self.bottom = Delegator(text)
        self.bottom.insert = self.redir.register("insert", self.insert)
        self.bottom.delete = self.redir.register("delete", self.delete)
        self.filters = []

    def close(self):
        while self.top is not self.bottom:
            self.removefilter(self.top)
        self.top = None
        self.bottom.setdelegate(None)
        self.bottom = None
        self.redir.close()
        self.redir = None
        self.text = None

    def insert(self, index, chars, tags=None):
        # Could go away if inheriting from Delegator
        self.top.insert(index, chars, tags)

    def delete(self, index1, index2=None):
        # Could go away if inheriting from Delegator
        self.top.delete(index1, index2)

    def insertfilter(self, filter):
        # Perhaps rename to pushfilter()?
        assert isinstance(filter, Delegator)
        assert filter.delegate is None
        filter.setdelegate(self.top)
        self.top = filter

    def removefilter(self, filter):
        # XXX Perhaps should only support popfilter()?
        assert isinstance(filter, Delegator)
        assert filter.delegate is not None
        f = self.top
        if f is filter:
            self.top = filter.delegate
            filter.setdelegate(None)
        else:
            while f.delegate is not filter:
                assert f is not self.bottom
                f.resetcache()
                f = f.delegate
            f.setdelegate(filter.delegate)
            filter.setdelegate(None)


def _percolator(parent):  # htest #
    import tkinter as tk

    class Tracer(Delegator):
        def __init__(self, name):
            self.name = name
            Delegator.__init__(self, None)

        def insert(self, *args):
            print(self.name, ": insert", args)
            self.delegate.insert(*args)

        def delete(self, *args):
            print(self.name, ": delete", args)
            self.delegate.delete(*args)

    box = tk.Toplevel(parent)
    box.title("Test Percolator")
    x, y = map(int, parent.geometry().split('+')[1:])
    box.geometry("+%d+%d" % (x, y + 175))
    text = tk.Text(box)
    p = Percolator(text)
    pin = p.insertfilter
    pout = p.removefilter
    t1 = Tracer("t1")
    t2 = Tracer("t2")

    def toggle1():
        (pin if var1.get() else pout)(t1)
    def toggle2():
        (pin if var2.get() else pout)(t2)

    text.pack()
    var1 = tk.IntVar(parent)
    cb1 = tk.Checkbutton(box, text="Tracer1", command=toggle1, variable=var1)
    cb1.pack()
    var2 = tk.IntVar(parent)
    cb2 = tk.Checkbutton(box, text="Tracer2", command=toggle2, variable=var2)
    cb2.pack()

if __name__ == "__main__":
    from unittest import main
    main('idlelib.idle_test.test_percolator', verbosity=2, exit=False)

    from idlelib.idle_test.htest import run
    run(_percolator)