From cd46c0a3458532b5a01c3d3f223f512bb3ddf04c Mon Sep 17 00:00:00 2001
From: helmutm <helmutm@fd906abe-77d9-0310-91a1-e0d9ade77398>
Date: Sun, 27 Apr 2008 09:56:37 +0000
Subject: [PATCH] transition now fires TransitionEvent; added more icons and
 corresponding settings for states

git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@2556 fd906abe-77d9-0310-91a1-e0d9ade77398
---
 browser/icons/cancel.png   | Bin 0 -> 792 bytes
 browser/icons/delete.png   | Bin 0 -> 3595 bytes
 browser/icons/favorite.png | Bin 0 -> 3284 bytes
 stateful/base.py           |   3 +++
 stateful/definition.py     |  21 ++++++++++++++++++++-
 stateful/interfaces.py     |  16 +++++++++++++++-
 stateful/publishing.py     |  11 ++++++-----
 7 files changed, 44 insertions(+), 7 deletions(-)
 create mode 100755 browser/icons/cancel.png
 create mode 100755 browser/icons/delete.png
 create mode 100755 browser/icons/favorite.png

diff --git a/browser/icons/cancel.png b/browser/icons/cancel.png
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diff --git a/browser/icons/delete.png b/browser/icons/delete.png
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diff --git a/stateful/base.py b/stateful/base.py
index f31e3ba..54d11a4 100644
--- a/stateful/base.py
+++ b/stateful/base.py
@@ -64,6 +64,9 @@ class Stateful(object):
         sd = self.getStatesDefinition()
         return sd.getAvailableTransitionsFor(self)
 
+    def getAvailableTransitionsForUser(self):
+        return self.getAvailableTransitions()
+
     def getStatesDefinition(self):
         return statesDefinitions.get(self.statesDefinition, None)
 
diff --git a/stateful/definition.py b/stateful/definition.py
index c3ba313..131413d 100644
--- a/stateful/definition.py
+++ b/stateful/definition.py
@@ -22,17 +22,21 @@ State definition implementation.
 $Id$
 """
 
+from zope.component.interfaces import ObjectEvent
+from zope.event import notify
 from zope.interface import implements
 from cybertools.util.jeep import Jeep
 
 from cybertools.stateful.interfaces import IState, ITransition
 from cybertools.stateful.interfaces import IStatesDefinition
+from cybertools.stateful.interfaces import ITransitionEvent
 
 
 class State(object):
 
     implements(IState)
 
+    icon = None
     color = 'blue'
 
     def __init__(self, name, title, transitions, **kw):
@@ -82,12 +86,27 @@ class StatesDefinition(object):
         if transition not in [t.name for t in self.getAvailableTransitionsFor(obj)]:
             raise ValueError("Transition '%s' is not reachable from state '%s'."
                                     % (transition, obj.getState()))
-        obj.state = self.transitions[transition].targetState
+        transObject = self.transitions[transition]
+        previousState = obj.state
+        obj.state = transObject.targetState
+        notify(TransitionEvent(obj, transObject, previousState))
 
     def getAvailableTransitionsFor(self, obj):
         state = obj.getState()
         return [self.transitions[t] for t in self.states[state].transitions]
 
+
+# event
+
+class TransitionEvent(ObjectEvent):
+
+    implements(ITransitionEvent)
+
+    def __init__(self, obj, transition, previousState):
+        super(TransitionEvent, self).__init__(obj)
+        self.transition = transition
+        self.previousState = previousState
+
 # dummy default states definition
 
 defaultSD = StatesDefinition('default',
diff --git a/stateful/interfaces.py b/stateful/interfaces.py
index 8a1d028..085bbe6 100644
--- a/stateful/interfaces.py
+++ b/stateful/interfaces.py
@@ -1,5 +1,5 @@
 #
-#  Copyright (c) 2007 Helmut Merz helmutm@cy55.de
+#  Copyright (c) 2008 Helmut Merz helmutm@cy55.de
 #
 #  This program is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by
@@ -22,6 +22,7 @@ Interfaces for the `stateful` package.
 $Id$
 """
 
+from zope.component.interfaces import IObjectEvent
 from zope.interface import Interface, Attribute
 
 
@@ -71,6 +72,12 @@ class IStateful(Interface):
             provide the ITransition interface.
         """
 
+    def getAvailableTransitionsForUser():
+        """ Return the transitions for this object that are available for
+            the current user. This is a subset of all available transitions
+            for the current state.
+        """
+
 
 class IHistorizable(Interface):
     """ An object that may record history information, e.g. when
@@ -105,3 +112,10 @@ class IStatesDefinition(Interface):
         """ Return the transitions available for this object in its current state.
         """
 
+
+class ITransitionEvent(IObjectEvent):
+    """ Fires when the state of an object is changed.
+    """
+
+    transition = Attribute('The transition.')
+    previousState = Attribute('The name of the state before the transition.')
diff --git a/stateful/publishing.py b/stateful/publishing.py
index 69c5128..1286b2c 100644
--- a/stateful/publishing.py
+++ b/stateful/publishing.py
@@ -33,11 +33,12 @@ from cybertools.stateful.interfaces import IStatesDefinition
 @implementer(IStatesDefinition)
 def simplePublishing():
     return StatesDefinition('publishing',
-        State('private', 'private', ('show', 'archive', 'remove')),
-        State('draft', 'draft', ('publish', 'hide', 'archive', 'remove')),
-        State('published', 'published', ('retract', 'archive')),
-        State('archived', 'archived', ('show', 'remove')),
-        State('removed', 'removed', ('show',)),
+        State('private', 'private', ('show', 'archive', 'remove'), color='red'),
+        State('draft', 'draft', ('publish', 'hide', 'archive', 'remove'),
+              color='yellow'),
+        State('published', 'published', ('retract', 'archive'), color='green'),
+        State('archived', 'archived', ('show', 'remove'), color='lightblue'),
+        State('removed', 'removed', ('show',), icon='cancel.png'),
         Transition('show', 'show', 'draft'),
         Transition('hide', 'hide', 'private'),
         Transition('publish', 'publish', 'published'),