Allow custom override of Chartjs graph defaults

[Robert Lyon]

Need to override the graph defaults so that we can use a custom tool tip template.

There will be 2 patches:

1) Allowing the passing in of custom graph options

2) Updating tooltip template for some graphs

I plan to put the allowing to choose custom options in the object passed to fetch_graph_data rather than in the graph functions themselves - this way the same saved graph data can be used with different custom settings.

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/4940

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/4941

[Jinelle Foley-Barnes (jinelleb)]

Hi,

Can I have some test instruction for these patches please.

Thank you,
Jinelle

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/4940
Committed: https://git.nzoss.org.nz/mahara/mahara/commit/eb205d6d492ff0e164b60dac8f93d4e0be7d8002
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit eb205d6d492ff0e164b60dac8f93d4e0be7d8002
Author: Robert Lyon <email address hidden>
Date: Thu Jul 9 16:19:31 2015 +1200

Bug 1472889: Allowing override of global chart settings

Change-Id: If629c70bfe1c8d0d36dbe9a284a58ad2734da753
Signed-off-by: Robert Lyon <email address hidden>

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/4941
Committed: https://git.nzoss.org.nz/mahara/mahara/commit/346c57e4b3f5d948358b8597269001e7e45dad9f
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit 346c57e4b3f5d948358b8597269001e7e45dad9f
Author: Robert Lyon <email address hidden>
Date: Thu Jul 9 16:44:17 2015 +1200

Bug 1472889: Adjustments to some of the stats graphs

1) Allowing the labels for the institutions graph be on mouseover

2) Restrict the number of items on graph to be 12 instead of 25

3) Allowing the weekly stats be line graphs

4) Allowing the template to override the colours for stored graph jsondata

Change-Id: Ie0b157fa1493755383b5207bc77e7b35ba140c7a
Signed-off-by: Robert Lyon <email address hidden>