Import Upstream version 2.7.18

Demo/tkinter/ttk/theme_selector.py

@@ -0,0 +1,61 @@
+"""Ttk Theme Selector v2.
+
+This is an improvement from the other theme selector (themes_combo.py)
+since now you can notice theme changes in Ttk Combobox, Ttk Frame,
+Ttk Label and Ttk Button.
+"""
+import Tkinter
+import ttk
+
+class App(ttk.Frame):
+    def __init__(self):
+        ttk.Frame.__init__(self, borderwidth=3)
+
+        self.style = ttk.Style()
+
+        # XXX Ideally I wouldn't want to create a Tkinter.IntVar to make
+        #     it works with Checkbutton variable option.
+        self.theme_autochange = Tkinter.IntVar(self, 0)
+        self._setup_widgets()
+
+    def _change_theme(self):
+        self.style.theme_use(self.themes_combo.get())
+
+    def _theme_sel_changed(self, widget):
+        if self.theme_autochange.get():
+            self._change_theme()
+
+    def _setup_widgets(self):
+        themes_lbl = ttk.Label(self, text="Themes")
+
+        themes = self.style.theme_names()
+        self.themes_combo = ttk.Combobox(self, values=themes, state="readonly")
+        self.themes_combo.set(themes[0])
+        self.themes_combo.bind("<<ComboboxSelected>>", self._theme_sel_changed)
+
+        change_btn = ttk.Button(self, text='Change Theme',
+            command=self._change_theme)
+
+        theme_change_checkbtn = ttk.Checkbutton(self,
+            text="Change themes when combobox item is activated",
+            variable=self.theme_autochange)
+
+        themes_lbl.grid(ipadx=6, sticky="w")
+        self.themes_combo.grid(row=0, column=1, padx=6, sticky="ew")
+        change_btn.grid(row=0, column=2, padx=6, sticky="e")
+        theme_change_checkbtn.grid(row=1, columnspan=3, sticky="w", pady=6)
+
+        top = self.winfo_toplevel()
+        top.rowconfigure(0, weight=1)
+        top.columnconfigure(0, weight=1)
+        self.columnconfigure(1, weight=1)
+        self.grid(row=0, column=0, sticky="nsew", columnspan=3, rowspan=2)
+
+
+def main():
+    app = App()
+    app.master.title("Theme Selector")
+    app.mainloop()
+
+if __name__ == "__main__":
+    main()