1 files changed, 83 insertions, 0 deletions
diff --git a/Demo/tkinter/ttk/widget_state.py b/Demo/tkinter/ttk/widget_state.py
new file mode 100644
index 0000000..c92c28b
--- /dev/null
+++ b/Demo/tkinter/ttk/widget_state.py
@@ -0,0 +1,83 @@
+"""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()