Editing: combo_themes.py
"""Ttk Theme Selector. Although it is a theme selector, you won't notice many changes since there is only a combobox and a frame around. """ import ttk class App(ttk.Frame): def __init__(self): ttk.Frame.__init__(self) self.style = ttk.Style() self._setup_widgets() def _change_theme(self, event): if event.widget.current(): # value #0 is not a theme newtheme = event.widget.get() # change to the new theme and refresh all the widgets self.style.theme_use(newtheme) def _setup_widgets(self): themes = list(self.style.theme_names()) themes.insert(0, "Pick a theme") # Create a readonly Combobox which will display 4 values at max, # which will cause it to create a scrollbar if there are more # than 4 values in total. themes_combo = ttk.Combobox(self, values=themes, state="readonly", height=4) themes_combo.set(themes[0]) # sets the combobox value to "Pick a theme" # Combobox widget generates a <<ComboboxSelected>> virtual event # when the user selects an element. This event is generated after # the listbox is unposted (after you select an item, the combobox's # listbox disappears, then it is said that listbox is now unposted). themes_combo.bind("<<ComboboxSelected>>", self._change_theme) themes_combo.pack(fill='x') self.pack(fill='both', expand=1) def main(): app = App() app.master.title("Ttk Combobox") app.mainloop() if __name__ == "__main__": main()
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