159 lines
4.5 KiB
Python
159 lines
4.5 KiB
Python
import os
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import tkFileDialog
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import tkMessageBox
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class IOBinding:
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# Calls to non-standard text methods:
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# reset_undo()
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# set_saved(1)
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def __init__(self, text):
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self.text = text
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self.text.bind("<<open-window-from-file>>", self.open)
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self.text.bind("<<save-window>>", self.save)
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self.text.bind("<<save-window-as-file>>", self.save_as)
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self.text.bind("<<save-copy-of-window-as-file>>", self.save_a_copy)
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filename_change_hook = None
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def set_filename_change_hook(self, hook):
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self.filename_change_hook = hook
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filename = None
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def set_filename(self, filename):
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self.filename = filename
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self.text.set_saved(1)
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if self.filename_change_hook:
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self.filename_change_hook()
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def open(self, event):
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if not self.text.get_saved():
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reply = self.maybesave()
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if reply == "cancel":
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return "break"
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filename = self.askopenfile()
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if filename:
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self.loadfile(filename)
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return "break"
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def loadfile(self, filename):
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try:
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f = open(filename)
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chars = f.read()
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f.close()
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except IOError, msg:
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tkMessageBox.showerror("I/O Error", str(msg), master=self.text)
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return 0
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self.text.delete("1.0", "end")
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self.set_filename(None)
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self.text.insert("1.0", chars)
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self.text.reset_undo()
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self.set_filename(filename)
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self.text.mark_set("insert", "1.0")
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self.text.see("insert")
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return 1
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def maybesave(self):
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if self.text.get_saved():
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return "yes"
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message = "Do you want to save %s before closing?" % (
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self.filename or "this untitled document")
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m = tkMessageBox.Message(
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title="Save On Close",
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message=message,
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icon=tkMessageBox.QUESTION,
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type=tkMessageBox.YESNOCANCEL,
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master=self.text)
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reply = m.show()
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if reply == "yes":
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self.save(None)
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if not self.text.get_saved():
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reply = "cancel"
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return reply
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def save(self, event):
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if not self.filename:
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self.save_as(event)
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else:
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if self.writefile(self.filename):
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self.text.set_saved(1)
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return "break"
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def save_as(self, event):
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filename = self.asksavefile()
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if filename:
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if self.writefile(filename):
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self.set_filename(filename)
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self.text.set_saved(1)
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return "break"
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def save_a_copy(self, event):
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filename = self.asksavefile()
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if filename:
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self.writefile(filename)
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return "break"
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def writefile(self, filename):
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try:
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f = open(filename, "w")
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chars = self.text.get("1.0", "end-1c")
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f.write(chars)
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if chars and chars[-1] != "\n":
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f.write("\n")
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f.close()
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## print "saved to", `filename`
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return 1
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except IOError, msg:
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tkMessageBox.showerror("I/O Error", str(msg),
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master=self.text)
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return 0
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opendialog = None
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savedialog = None
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filetypes = [
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("Python files", "*.py", "TEXT"),
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("All text files", "*", "TEXT"),
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("All files", "*"),
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]
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def askopenfile(self):
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dir, base = self.defaultfilename("open")
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if not self.opendialog:
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self.opendialog = tkFileDialog.Open(master=self.text,
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filetypes=self.filetypes)
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return self.opendialog.show(initialdir=dir, initialfile=base)
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def defaultfilename(self, mode="open"):
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if self.filename:
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dir, base = os.path.split(self.filename)
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else:
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dir = base = ""
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return dir, base
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def asksavefile(self):
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dir, base = self.defaultfilename("save")
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if not self.savedialog:
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self.savedialog = tkFileDialog.SaveAs(master=self.text,
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filetypes=self.filetypes)
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return self.savedialog.show(initialdir=dir, initialfile=base)
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def test():
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from Tkinter import *
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root = Tk()
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class MyText(Text):
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def reset_undo(self): pass
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def set_saved(self, flag): pass
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text = MyText(root)
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text.pack()
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text.focus_set()
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io = IOBinding(text)
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root.mainloop()
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if __name__ == "__main__":
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test()
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