UI: Execution & task screens - state info tooltip

* Added tooltip to view "state info" on error states
* Extended Horizon base to support such behaviour (SmartCell)
* Implementation derived following a discussion with Horizon developers
* I was asked by Horizon devs to push an architectural solution
  so we may won't need that "workarround" in the future

Screenshots:
 http://pasteboard.co/lvX8FX2.png
 http://pasteboard.co/lAnTDBq.png

Partially implements blueprint: mistral-dashboard-executions-screen
Partially implements blueprint: tasks-screen-improvments

Change-Id: I9781e61b5385f96bcc73c4c8dbb93671ea179e73

mistraldashboard/default/SmartCell.py

@@ -0,0 +1,81 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright © 2015 - Alcatel-Lucent
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""File Overrides OpenStack Horizon Cell method to return the whole
+ row data using cell_attributes_getter"""
+
+from django import forms
+from django import template
+
+from horizon.tables.base import Cell
+
+import six
+
+
+def get_data(self, datum, column, row):
+    """Fetches the data to be displayed in this cell."""
+    table = row.table
+    if column.auto == "multi_select":
+        data = ""
+        if row.can_be_selected(datum):
+            widget = forms.CheckboxInput(check_test=lambda value: False)
+            # Convert value to string to avoid accidental type conversion
+            data = widget.render('object_ids',
+                                 six.text_type(table.get_object_id(datum)),
+                                 {'class': 'table-row-multi-select'})
+        table._data_cache[column][table.get_object_id(datum)] = data
+    elif column.auto == "form_field":
+        widget = column.form_field
+        if issubclass(widget.__class__, forms.Field):
+            widget = widget.widget
+
+        widget_name = "%s__%s" % \
+                      (column.name,
+                       six.text_type(table.get_object_id(datum)))
+
+        # Create local copy of attributes, so it don't change column
+        # class form_field_attributes
+        form_field_attributes = {}
+        form_field_attributes.update(column.form_field_attributes)
+        # Adding id of the input so it pairs with label correctly
+        form_field_attributes['id'] = widget_name
+
+        if (template.defaultfilters.urlize in column.filters or
+           template.defaultfilters.yesno in column.filters):
+                data = widget.render(widget_name,
+                                     column.get_raw_data(datum),
+                                     form_field_attributes)
+        else:
+            data = widget.render(widget_name,
+                                 column.get_data(datum),
+                                 form_field_attributes)
+        table._data_cache[column][table.get_object_id(datum)] = data
+    elif column.auto == "actions":
+        data = table.render_row_actions(datum, pull_right=False)
+        table._data_cache[column][table.get_object_id(datum)] = data
+    else:
+        data = column.get_data(datum)
+        if column.cell_attributes_getter:
+            # Following line is the change: cell_attributes_getter called with
+            #  "datum" instead of "data"
+            cell_attributes = column.cell_attributes_getter(datum) or {}
+            self.attrs.update(cell_attributes)
+
+    return data
+
+
+def init():
+    Cell.get_data = get_data

mistraldashboard/executions/tables.py

@@ -21,9 +21,12 @@ from horizon import exceptions
 from horizon import tables
 
 from mistraldashboard import api
+import mistraldashboard.default.SmartCell as SmartCell
 from mistraldashboard.default.utils import humantime
 from mistraldashboard.default.utils import label
 
+SmartCell.init()
+
 
 class DeleteExecution(tables.DeleteAction):
     @staticmethod
@@ -155,6 +158,11 @@ class UpdateRow(tables.Row):
 
 class ExecutionsTable(tables.DataTable):
 
+    def getHoverHelp(data):
+        if hasattr(data, 'state_info') and data.state_info:
+
+                return {'title': data.state_info}
+
     STATE_STATUS_CHOICES = (
         ("success", True),
         ("error", False),
@@ -214,6 +222,7 @@ class ExecutionsTable(tables.DataTable):
         filters=[label],
         status=True,
         status_choices=STATE_STATUS_CHOICES,
+        cell_attributes_getter=getHoverHelp
     )
 
     class Meta(object):

mistraldashboard/tasks/tables.py

@@ -20,9 +20,12 @@ from horizon import exceptions
 from horizon import tables
 
 from mistraldashboard import api
+import mistraldashboard.default.SmartCell as SmartCell
 from mistraldashboard.default.utils import humantime
 from mistraldashboard.default.utils import label
 
+SmartCell.init()
+
 
 class UpdateRow(tables.Row):
     ajax = True
@@ -41,6 +44,11 @@ class UpdateRow(tables.Row):
 
 class TaskTable(tables.DataTable):
 
+    def getHoverHelp(data):
+        if hasattr(data, 'state_info') and data.state_info:
+
+                return {'title': data.state_info}
+
     STATE_STATUS_CHOICES = (
         ("success", True),
         ("error", False),
@@ -92,7 +100,8 @@ class TaskTable(tables.DataTable):
         status=True,
         status_choices=STATE_STATUS_CHOICES,
         verbose_name=_("State"),
-        filters=[label]
+        filters=[label],
+        cell_attributes_getter=getHoverHelp
     )
 
     class Meta(object):