from __future__ import print_function
try:
    import Tkinter
except ImportError:
    import tkinter as Tkinter

#
# Create a GUI with a text widget whose items may be edited
# as well as controlled by buttons.
#
class TextDemo:

    # __init__() and run() together serve the same
    # purpose as the main() function in other examples.
    def __init__(self):
        self.app = Tkinter.Frame()
        self.app.grid(sticky="nsew")
        self.make_ui(self.app)
        # We have to tell the toplevel window that the frame
        # that we created should be adjustable (weight != 0)
        top = self.app.winfo_toplevel()
        top.columnconfigure(0, weight=1)
        top.rowconfigure(0, weight=1)

    def run(self):
        self.app.mainloop()

    # "make_ui" is similar to the one in tkinter_canvas.py
    # except we call "make_movable" for each item we create.
    def make_ui(self, app):
        self.text = Tkinter.Text(app, width=80, height=40)
        # Just as above, we need to tell "app" that the widget
        # in row 0, column 0 is resizable
        app.columnconfigure(0, weight=1)
        app.rowconfigure(0, weight=1)
        self.text.grid(row=0, column=0, sticky="nsew")
        # Create a frame to hold buttons across bottom
        f = Tkinter.Frame(app)
        f.grid(row=1, column=0, sticky="ew")
        b = Tkinter.Button(f, text="Clear", command=self.clear_cb)
        b.grid(row=0, column=0)
        b = Tkinter.Button(f, text="Mark", command=self.mark_cb)
        b.grid(row=0, column=1)
        b = Tkinter.Button(f, text="Quit", command=app.quit)
        b.grid(row=0, column=2)

    def clear_cb(self):
        self.text.delete("1.0", "end")

    def mark_cb(self):
        self.text.insert("end", "\n--- MARK ---\n")


if __name__ == "__main__":
    TextDemo().run()
    print("Finished")