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Edit File : Percolator.py \| Size : 3.17 KB
from idlelib.WidgetRedirector import WidgetRedirector from idlelib.Delegator import Delegator 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): import tkinter as tk import re 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) root = tk.Tk() root.title("Test Percolator") width, height, x, y = list(map(int, re.split('[x+]', parent.geometry()))) root.geometry("+%d+%d"%(x, y + 150)) text = tk.Text(root) p = Percolator(text) t1 = Tracer("t1") t2 = Tracer("t2") def toggle1(): if var1.get() == 0: var1.set(1) p.insertfilter(t1) elif var1.get() == 1: var1.set(0) p.removefilter(t1) def toggle2(): if var2.get() == 0: var2.set(1) p.insertfilter(t2) elif var2.get() == 1: var2.set(0) p.removefilter(t2) text.pack() var1 = tk.IntVar() cb1 = tk.Checkbutton(root, text="Tracer1", command=toggle1, variable=var1) cb1.pack() var2 = tk.IntVar() cb2 = tk.Checkbutton(root, text="Tracer2", command=toggle2, variable=var2) cb2.pack() root.mainloop() if __name__ == "__main__": from idlelib.idle_test.htest import run run(_percolator) Back

Edit File : Percolator.py | Size : 3.17 KB

from idlelib.WidgetRedirector import WidgetRedirector
from idlelib.Delegator import Delegator

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):
    import tkinter as tk
    import re
    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)
    root = tk.Tk()
    root.title("Test Percolator")
    width, height, x, y = list(map(int, re.split('[x+]', parent.geometry())))
    root.geometry("+%d+%d"%(x, y + 150))
    text = tk.Text(root)
    p = Percolator(text)
    t1 = Tracer("t1")
    t2 = Tracer("t2")

def toggle1():
        if var1.get() == 0:
            var1.set(1)
            p.insertfilter(t1)
        elif var1.get() == 1:
            var1.set(0)
            p.removefilter(t1)

def toggle2():
        if var2.get() == 0:
            var2.set(1)
            p.insertfilter(t2)
        elif var2.get() == 1:
            var2.set(0)
            p.removefilter(t2)

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

root.mainloop()

if __name__ == "__main__":
    from idlelib.idle_test.htest import run
    run(_percolator)

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