work in progress: provide parts for presenting resource lists, starting with grid

browser/lobo/configure.zcml

@@ -63,4 +63,14 @@
         factory="loops.browser.lobo.standard.ConceptView"
         permission="zope.View" />
 
+  <!-- parts for displaying resources -->
+
+  <zope:adapter
+        name="lobo_rg3"
+        for="loops.interfaces.IConcept
+             loops.browser.skin.Lobo"
+        provides="zope.interface.Interface"
+        factory="loops.browser.lobo.standard.ResourceGrid3"
+        permission="zope.View" />
+
 </configure>

browser/lobo/standard.pt

@@ -65,6 +65,25 @@
 </metal:block>
 
 
+<!-- resources listing macros -->
+
+<metal:block define-macro="rgrid">
+  <tal:cell repeat="cell part/getResources">
+    <div tal:attributes="class cell/cssClass;
+                         style cell/style">
+      <a tal:attributes="href cell/targetUrl;
+                         title cell/description">
+        <metal:image use-macro="item/macros/image" />
+        <div class="legend">
+          <b tal:content="cell/title" /><br />
+          <i tal:content="cell/description" />
+        </div>
+      </a>
+    </div>
+  </tal:cell>
+</metal:block>
+
+
 <!-- basic component macros -->
 
 <metal:image define-macro="image">

browser/lobo/standard.py

@@ -30,6 +30,8 @@ from zope.cachedescriptors.property import Lazy
 from cybertools.typology.interfaces import IType
 from loops.browser.concept import ConceptView as BaseConceptView
 from loops.browser.concept import ConceptRelationView as BaseConceptRelationView
+from loops.browser.resource import ResourceView as BaseResourceView
+from loops.browser.resource import ResourceRelationView as BaseResourceRelationView
 from loops.common import adapted, baseObject
 
 
@@ -209,3 +211,55 @@ class Header2(BasePart):
     imageSize = 'medium'
     cssClass = ['span-4', 'span-2 last', 'clear']
 
+
+# layout components for presenting lists of resources
+
+class ResourceRelationView(BaseResourceRelationView):
+
+    def __init__(self, relation, request, contextIsSecond=False,
+                 parent=None, idx=0):
+        BaseResourceRelationView.__init__(self, relation, request, contextIsSecond)
+        self.parentView = parent
+        self.idx = idx
+
+    @Lazy
+    def targetUrl(self):
+        return self.nodeView.getUrlForTarget(self.context)
+
+    @Lazy
+    def cssClass(self):
+        pattern = self.parentView.gridPattern
+        if pattern:
+            return pattern[self.idx % len(pattern)]
+
+    @Lazy
+    def style(self):
+        return 'height: %s' % self.parentView.height
+
+    @Lazy
+    def img(self):
+        self.registerDojoLightbox() # also provides access to info popup
+        url = self.nodeView.getUrlForTarget(self.context)
+        src = ('%s/mediaasset.html?v=%s' % (url, self.parentView.imageSize))
+        return dict(src=src, url=url,
+                    cssClass=self.parentView.imageCssClass)
+
+class ResourcesPart(BasePart):
+
+    def getResources(self):
+        result = []
+        resourceRels = self.context.getResourceRelations()
+        for idx, r in enumerate(resourceRels):
+            result.append(ResourceRelationView(r, self.request,
+                                contextIsSecond=True, parent=self, idx=idx))
+        return result
+
+
+class ResourceGrid3(ResourcesPart):
+
+    macroName = 'rgrid'
+    imageSize = 'small'
+    height = 'auto; padding-bottom: 10px'
+    gridPattern = ['span-2', 'span-2', 'span-2 last']
+
+