Python 2.7/Windows resizable ttk progressbar?

I'm experimenting with Python 2.7's new Tkinter Tile support (ttk). Is there a way to make the ttk.Progressbar() control auto-resize in proportion to its parent container? In reading the documentation on this control, it appears that one must explicitly set this widget's height or width?

I'm looking for a way to place the ttk.Progressbar widget in a horizontally resizable Tkinter dialog and have this widget resize as a user resize'开发者_JS百科s the parent dialog.

Is there a window or frame resize event that I can trap, a ttk.Progressbar setting I can .config(), or .pack() option I can use to achieve my goal?

Any suggestions appreciated.

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Try using the fill option of pack (or grid) to have the widget fill its container.

import Tkinter as tk
import ttk

root=tk.Tk()
pb = ttk.Progressbar(mode="indeterminate")
pb.pack(side="bottom", fill="x")
pb.start()
root.wm_geometry("300x300")
root.mainloop()