mirror of https://github.com/python/cpython
47 lines
1.6 KiB
Python
47 lines
1.6 KiB
Python
|
"""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.
|
||
|
|
"""
|
||
|
|
from tkinter 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()
|