From ecf1558c08496674f0396681ccdaee6048e00420 Mon Sep 17 00:00:00 2001
From: "R. Tyler Ballance" <tyler@monkeypox.org>
Date: Sun, 22 Feb 2009 22:14:54 -0800
Subject: [PATCH] Start to add the events manager code, I think this should all
 be nice and event driven

Signed-off-by: R. Tyler Ballance <tyler@monkeypox.org>
---
 .gitignore  |  2 ++
 __init__.py | 44 ++++++++++++++++++++++++++++++++++++++++++--
 events.py   | 27 +++++++++++++++++++++++++++
 3 files changed, 71 insertions(+), 2 deletions(-)
 create mode 100644 .gitignore
 create mode 100644 events.py

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c9b568f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.pyc
+*.swp
diff --git a/__init__.py b/__init__.py
index a1af107..a488b33 100644
--- a/__init__.py
+++ b/__init__.py
@@ -1,3 +1,4 @@
+import copy
 import curses
 import weakref
 
@@ -45,7 +46,7 @@ class Menu(Widget):
 				self.parent.addstr(y, x, element[under+2:], self.NORMAL)
 				x = x + len(element[under+2:])
 			else:
-				self.parent.addstr(y, x, element)
+				self.parent.addstr(y, x, element, self.NORMAL)
 				x = x + len(element)
 
 			if element != self.elements[-1]:
@@ -56,4 +57,43 @@ class Window(Widget):
 	pass
 
 class Submenu(Widget):
-	pass
+	''' Submenu is a basic class for handling vertically drawn, i.e. sub-menus '''
+	HOTKEY = curses.A_BOLD | curses.A_UNDERLINE 
+	NORMAL = curses.A_NORMAL
+	def __init__(self, *args, **kwargs):
+		super(Submenu, self).__init__(*args, **kwargs)
+		self.elements = kwargs['elements']
+		self._window = None
+		self._width = 0
+
+	def render(self):
+		assert self.parent, ('Parent cannot be None to render a submenu!')
+		assert isinstance(self.parent, Menu), (self.parent, 'Expecting parent widget to be a Menu')
+		startx, starty = 1, 3
+		
+		elms = copy.deepcopy(self.elements)
+		elms.sort(key=lambda e: len(e), reverse=True)
+		self._width = elms[0] + 1
+		
+		self._window = curses.newwin(len(self.elements), self._width, starty, startx)
+	
+		for element in self.elements:
+			y = starty + 1
+			x = startx
+			under = None
+			try:
+				under = element.index('_')
+			except ValueError:
+				pass
+
+			if not under == None:
+				self._window.addstr(y, x, element[under+1:under+2], self.HOTKEY)
+				x = x + 1
+				self._window.addstr(y, x, element[under+2:], self.NORMAL)
+			elif element == '---':
+				self._window.hline(y, x, curses.ACS_HLINE, self._width)
+			else:
+				self._window.addstr(y, x, element, self.NORMAL)
+
+
+
diff --git a/events.py b/events.py
new file mode 100644
index 0000000..629309f
--- /dev/null
+++ b/events.py
@@ -0,0 +1,27 @@
+import types
+
+class StandardEvents(object):
+	QuitApplication = 'ConsoleUIQuit'
+	CloseWIndow = 'ConsoleUICloseWindow'
+
+class EventManagerError(Exception):
+	pass
+
+class EventManager(object):
+	def __init__(self, *args, **kwargs):
+		self.name = kwargs['name']
+		self.observers = {}
+
+	def register_handler(self, event, handler):
+		if not isinstance(handler, types.MethodType) or not isinstance(handler, types.FunctionType):
+			raise EventManagerError('When using register_handler(event, handler) the handler argument must be a method or function')
+		if not self.observers.get(event):
+			self.observers[event] = []
+		self.observers[event].append(handler)
+
+	def raise_event(self, event, **kwargs):
+		if self.observers.get(event):
+			for handler in self.observers[event]:
+				handler(event, **kwargs)
+	
+manager = EventManager(name='Global Event Manager')