| 1 | """Sample demo showing widget states and some font styling."""
|
|---|
| 2 | import ttk
|
|---|
| 3 |
|
|---|
| 4 | states = ['active', 'disabled', 'focus', 'pressed', 'selected',
|
|---|
| 5 | 'background', 'readonly', 'alternate', 'invalid']
|
|---|
| 6 |
|
|---|
| 7 | for state in states[:]:
|
|---|
| 8 | states.append("!" + state)
|
|---|
| 9 |
|
|---|
| 10 | def reset_state(widget):
|
|---|
| 11 | nostate = states[len(states) // 2:]
|
|---|
| 12 | widget.state(nostate)
|
|---|
| 13 |
|
|---|
| 14 | class App(ttk.Frame):
|
|---|
| 15 | def __init__(self, title=None):
|
|---|
| 16 | ttk.Frame.__init__(self, borderwidth=6)
|
|---|
| 17 | self.master.title(title)
|
|---|
| 18 |
|
|---|
| 19 | self.style = ttk.Style()
|
|---|
| 20 |
|
|---|
| 21 | # get default font size and family
|
|---|
| 22 | btn_font = self.style.lookup("TButton", "font")
|
|---|
| 23 | fsize = str(self.tk.eval("font configure %s -size" % btn_font))
|
|---|
| 24 | self.font_family = self.tk.eval("font configure %s -family" % btn_font)
|
|---|
| 25 | if ' ' in self.font_family:
|
|---|
| 26 | self.font_family = '{%s}' % self.font_family
|
|---|
| 27 | self.fsize_prefix = fsize[0] if fsize[0] == '-' else ''
|
|---|
| 28 | self.base_fsize = int(fsize[1 if fsize[0] == '-' else 0:])
|
|---|
| 29 |
|
|---|
| 30 | # a list to hold all the widgets that will have their states changed
|
|---|
| 31 | self.update_widgets = []
|
|---|
| 32 |
|
|---|
| 33 | self._setup_widgets()
|
|---|
| 34 |
|
|---|
| 35 | def _set_font(self, extra=0):
|
|---|
| 36 | self.style.configure("TButton", font="%s %s%d" % (self.font_family,
|
|---|
| 37 | self.fsize_prefix, self.base_fsize + extra))
|
|---|
| 38 |
|
|---|
| 39 | def _new_state(self, widget, newtext):
|
|---|
| 40 | widget = self.nametowidget(widget)
|
|---|
| 41 |
|
|---|
| 42 | if not newtext:
|
|---|
| 43 | goodstates = ["disabled"]
|
|---|
| 44 | font_extra = 0
|
|---|
| 45 | else:
|
|---|
| 46 | # set widget state according to what has been entered in the entry
|
|---|
| 47 | newstates = set(newtext.split()) # eliminate duplicates
|
|---|
| 48 |
|
|---|
| 49 | # keep only the valid states
|
|---|
| 50 | goodstates = [state for state in newstates if state in states]
|
|---|
| 51 | # define a new font size based on amount of states
|
|---|
| 52 | font_extra = 2 * len(goodstates)
|
|---|
| 53 |
|
|---|
| 54 | # set new widget state
|
|---|
| 55 | for widget in self.update_widgets:
|
|---|
| 56 | reset_state(widget) # remove any previous state from the widget
|
|---|
| 57 | widget.state(goodstates)
|
|---|
| 58 |
|
|---|
| 59 | # update Ttk Button font size
|
|---|
| 60 | self._set_font(font_extra)
|
|---|
| 61 | return 1
|
|---|
| 62 |
|
|---|
| 63 | def _setup_widgets(self):
|
|---|
| 64 | btn = ttk.Button(self, text='Enter states and watch')
|
|---|
| 65 |
|
|---|
| 66 | entry = ttk.Entry(self, cursor='xterm', validate="key")
|
|---|
| 67 | entry['validatecommand'] = (self.register(self._new_state), '%W', '%P')
|
|---|
| 68 | entry.focus()
|
|---|
| 69 |
|
|---|
| 70 | self.update_widgets.append(btn)
|
|---|
| 71 | entry.validate()
|
|---|
| 72 |
|
|---|
| 73 | entry.pack(fill='x', padx=6)
|
|---|
| 74 | btn.pack(side='left', pady=6, padx=6, anchor='n')
|
|---|
| 75 | self.pack(fill='both', expand=1)
|
|---|
| 76 |
|
|---|
| 77 |
|
|---|
| 78 | def main():
|
|---|
| 79 | app = App("Widget State Tester")
|
|---|
| 80 | app.mainloop()
|
|---|
| 81 |
|
|---|
| 82 | if __name__ == "__main__":
|
|---|
| 83 | main()
|
|---|
