Changeset 5083 for main/waeup.sirp/trunk

Timestamp:

25 Mar 2010, 15:47:43 (15 years ago)

Author:

uli

Message:

Make ActionButton? viewlets more or less independent from the package
they're contained in. Setting the used template file explicitly and
mangling the static attribute, we can define inheriting classes in
packages other than w.s.browser, which would as fallback still use the
local templates and action icons.

File:

• main/waeup.sirp/trunk/src/waeup/sirp/browser/viewlets.py (modified) (4 diffs)

main/waeup.sirp/trunk/src/waeup/sirp/browser/viewlets.py

@@ -4 +4 @@
 
 from hurry import yui
-from zope.component import getMultiAdapter
+from zope.component import getMultiAdapter, queryAdapter
+from zope.interface import Interface
 from zope.location.interfaces import ISite
 from waeup.sirp.browser.pages import (
@@ -57 +58 @@
     grok.baseclass()
     grok.context(IWAeUPObject)
-    grok.template('actionbutton')
     grok.viewletmanager(ActionBar)
     icon = 'actionicon_modify.png' # File must exist in static/
@@ -63 +63 @@
     text = 'Edit settings' # Text to display on the button
 
+    # We set the template file explicitly (instead of using
+    # ``grok.template('actionbutton')``) to stick with this template
+    # also in derived classes in other packages. If we didn't, those
+    # derived ActionButton viewlets had to provide an own template,
+    # which would not be updated automatically, when the local
+    # template ``templates/actionbutton.pt`` changes.
+    #
+    # Inheriting viewlets that wish to use their own template anyway
+    # can do so by setting their local ``grok.template(<mytemplate>)``
+    # and setting ``template`` to ``None`` for the class::
+    #
+    # class DerivedActionButton(ActionButton):
+    #   ...
+    #   grok.template('overriding_template')
+    #   template = None
+    #   ...
+    #
+    template = grok.PageTemplateFile('templates/actionbutton.pt')
+
     @property
     def alt(self):
@@ -73 +92 @@
         """Get the icon URL.
         """
-        return self.view.static[self.icon]()
+        static = self.view.static
+        if static is None or static.get(self.icon, None) is None:
+            # In derived classes defined in other modules/packages
+            # than w.s.browser, ``static`` might refer to a static dir
+            # local to the derived class' module. As we often like to
+            # get the icons from here
+            # (i.e. waeup.sirp.browser/static), we set the directory
+            # resource appropiately.
+            #
+            # XXX: The hardcoding of 'w.s.browser' should be replaced
+            #      by something smarter.
+            #
+            # TODO: notes in here should go to general documentation.
+            static = queryAdapter(
+                self.request, Interface, name='waeup.sirp.browser')
+        return static[self.icon]()
 
     @property