mirror of https://github.com/python/cpython
105 lines
3.2 KiB
Python
105 lines
3.2 KiB
Python
from idlelib.WidgetRedirector import WidgetRedirector
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from idlelib.Delegator import Delegator
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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); self.bottom = None
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self.redir.close(); 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):
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import tkinter as tk
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import re
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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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root = tk.Tk()
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root.title("Test Percolator")
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width, height, x, y = list(map(int, re.split('[x+]', parent.geometry())))
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root.geometry("+%d+%d"%(x, y + 150))
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text = tk.Text(root)
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p = Percolator(text)
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t1 = Tracer("t1")
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t2 = Tracer("t2")
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def toggle1():
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if var1.get() == 0:
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var1.set(1)
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p.insertfilter(t1)
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elif var1.get() == 1:
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var1.set(0)
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p.removefilter(t1)
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def toggle2():
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if var2.get() == 0:
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var2.set(1)
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p.insertfilter(t2)
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elif var2.get() == 1:
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var2.set(0)
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p.removefilter(t2)
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text.pack()
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var1 = tk.IntVar()
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cb1 = tk.Checkbutton(root, text="Tracer1", command=toggle1, variable=var1)
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cb1.pack()
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var2 = tk.IntVar()
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cb2 = tk.Checkbutton(root, text="Tracer2", command=toggle2, variable=var2)
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cb2.pack()
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root.mainloop()
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if __name__ == "__main__":
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from idlelib.idle_test.htest import run
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run(_percolator)
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