mirror of https://github.com/python/cpython
84 lines
2.7 KiB
Python
84 lines
2.7 KiB
Python
|
"""Sample demo showing widget states and some font styling."""
|
||
|
|
import ttk
|
||
|
|
|
||
|
|
states = ['active', 'disabled', 'focus', 'pressed', 'selected',
|
||
|
|
'background', 'readonly', 'alternate', 'invalid']
|
||
|
|
|
||
|
|
for state in states[:]:
|
||
|
|
states.append("!" + state)
|
||
|
|
|
||
|
|
def reset_state(widget):
|
||
|
|
nostate = states[len(states) // 2:]
|
||
|
|
widget.state(nostate)
|
||
|
|
|
||
|
|
class App(ttk.Frame):
|
||
|
|
def __init__(self, title=None):
|
||
|
|
ttk.Frame.__init__(self, borderwidth=6)
|
||
|
|
self.master.title(title)
|
||
|
|
|
||
|
|
self.style = ttk.Style()
|
||
|
|
|
||
|
|
# get default font size and family
|
||
|
|
btn_font = self.style.lookup("TButton", "font")
|
||
|
|
fsize = str(self.tk.eval("font configure %s -size" % btn_font))
|
||
|
|
self.font_family = self.tk.eval("font configure %s -family" % btn_font)
|
||
|
|
if ' ' in self.font_family:
|
||
|
|
self.font_family = '{%s}' % self.font_family
|
||
|
|
self.fsize_prefix = fsize[0] if fsize[0] == '-' else ''
|
||
|
|
self.base_fsize = int(fsize[1 if fsize[0] == '-' else 0:])
|
||
|
|
|
||
|
|
# a list to hold all the widgets that will have their states changed
|
||
|
|
self.update_widgets = []
|
||
|
|
|
||
|
|
self._setup_widgets()
|
||
|
|
|
||
|
|
def _set_font(self, extra=0):
|
||
|
|
self.style.configure("TButton", font="%s %s%d" % (self.font_family,
|
||
|
|
self.fsize_prefix, self.base_fsize + extra))
|
||
|
|
|
||
|
|
def _new_state(self, widget, newtext):
|
||
|
|
widget = self.nametowidget(widget)
|
||
|
|
|
||
|
|
if not newtext:
|
||
|
|
goodstates = ["disabled"]
|
||
|
|
font_extra = 0
|
||
|
|
else:
|
||
|
|
# set widget state according to what has been entered in the entry
|
||
|
|
newstates = set(newtext.split()) # eliminate duplicates
|
||
|
|
|
||
|
|
# keep only the valid states
|
||
|
|
goodstates = [state for state in newstates if state in states]
|
||
|
|
# define a new font size based on amount of states
|
||
|
|
font_extra = 2 * len(goodstates)
|
||
|
|
|
||
|
|
# set new widget state
|
||
|
|
for widget in self.update_widgets:
|
||
|
|
reset_state(widget) # remove any previous state from the widget
|
||
|
|
widget.state(goodstates)
|
||
|
|
|
||
|
|
# update Ttk Button font size
|
||
|
|
self._set_font(font_extra)
|
||
|
|
return 1
|
||
|
|
|
||
|
|
def _setup_widgets(self):
|
||
|
|
btn = ttk.Button(self, text='Enter states and watch')
|
||
|
|
|
||
|
|
entry = ttk.Entry(self, cursor='xterm', validate="key")
|
||
|
|
entry['validatecommand'] = (self.register(self._new_state), '%W', '%P')
|
||
|
|
entry.focus()
|
||
|
|
|
||
|
|
self.update_widgets.append(btn)
|
||
|
|
entry.validate()
|
||
|
|
|
||
|
|
entry.pack(fill='x', padx=6)
|
||
|
|
btn.pack(side='left', pady=6, padx=6, anchor='n')
|
||
|
|
self.pack(fill='both', expand=1)
|
||
|
|
|
||
|
|
|
||
|
|
def main():
|
||
|
|
app = App("Widget State Tester")
|
||
|
|
app.mainloop()
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
main()
|