Merge pull request #396 from bbernhard/popup_menu

reworked PopupMenu implementation

bumblebee/popup_v2.py

@@ -0,0 +1,38 @@
+"""Pop-up menus."""
+
+try:
+    import Tkinter as tk
+except ImportError:
+    # python 3
+    try:
+        import tkinter as tk
+    except ImportError:
+        pass
+
+import functools
+
+
+class PopupMenu(object):
+    def __init__(self):
+        self._root = tk.Tk()
+        self._root.withdraw()
+        self._menu = tk.Menu(self._root)
+        self._menu.bind("<FocusOut>", self._on_focus_out)
+
+    def _on_focus_out(self, event=None):
+        self._root.destroy()
+
+    def _on_click(self, callback):
+        self._root.destroy()
+        callback()
+
+
+    def add_menuitem(self, menuitem, callback):
+        self._menu.add_command(label=menuitem, command=functools.partial(self._on_click, callback))
+
+    def show(self, event):
+        try:
+            self._menu.tk_popup(event['x'], event['y'])
+        finally:
+            self._menu.grab_release()
+        self._root.mainloop()