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104 lines
3.1 KiB
104 lines
3.1 KiB
from idlelib.delegator import Delegator
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from idlelib.redirector import WidgetRedirector
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class Percolator:
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def __init__(self, text):
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# XXX would be nice to inherit from Delegator
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self.text = text
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self.redir = WidgetRedirector(text)
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self.top = self.bottom = Delegator(text)
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self.bottom.insert = self.redir.register("insert", self.insert)
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self.bottom.delete = self.redir.register("delete", self.delete)
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self.filters = []
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def close(self):
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while self.top is not self.bottom:
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self.removefilter(self.top)
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self.top = None
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self.bottom.setdelegate(None)
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self.bottom = None
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self.redir.close()
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self.redir = None
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self.text = None
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def insert(self, index, chars, tags=None):
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# Could go away if inheriting from Delegator
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self.top.insert(index, chars, tags)
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def delete(self, index1, index2=None):
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# Could go away if inheriting from Delegator
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self.top.delete(index1, index2)
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def insertfilter(self, filter):
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# Perhaps rename to pushfilter()?
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assert isinstance(filter, Delegator)
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assert filter.delegate is None
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filter.setdelegate(self.top)
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self.top = filter
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def removefilter(self, filter):
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# XXX Perhaps should only support popfilter()?
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assert isinstance(filter, Delegator)
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assert filter.delegate is not None
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f = self.top
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if f is filter:
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self.top = filter.delegate
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filter.setdelegate(None)
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else:
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while f.delegate is not filter:
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assert f is not self.bottom
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f.resetcache()
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f = f.delegate
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f.setdelegate(filter.delegate)
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filter.setdelegate(None)
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def _percolator(parent): # htest #
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import tkinter as tk
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class Tracer(Delegator):
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def __init__(self, name):
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self.name = name
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Delegator.__init__(self, None)
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def insert(self, *args):
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print(self.name, ": insert", args)
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self.delegate.insert(*args)
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def delete(self, *args):
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print(self.name, ": delete", args)
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self.delegate.delete(*args)
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box = tk.Toplevel(parent)
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box.title("Test Percolator")
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x, y = map(int, parent.geometry().split('+')[1:])
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box.geometry("+%d+%d" % (x, y + 175))
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text = tk.Text(box)
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p = Percolator(text)
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pin = p.insertfilter
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pout = p.removefilter
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t1 = Tracer("t1")
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t2 = Tracer("t2")
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def toggle1():
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(pin if var1.get() else pout)(t1)
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def toggle2():
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(pin if var2.get() else pout)(t2)
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text.pack()
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var1 = tk.IntVar(parent)
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cb1 = tk.Checkbutton(box, text="Tracer1", command=toggle1, variable=var1)
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cb1.pack()
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var2 = tk.IntVar(parent)
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cb2 = tk.Checkbutton(box, text="Tracer2", command=toggle2, variable=var2)
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cb2.pack()
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if __name__ == "__main__":
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from unittest import main
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main('idlelib.idle_test.test_percolator', verbosity=2, exit=False)
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from idlelib.idle_test.htest import run
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run(_percolator)
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