tracks/app/views/stats/_contexts.html.erb

<br style="clear:both">

<% data = {
  datasets: [{
    data: Array.new
  }],
  labels: Array.new
}
Stats::TopContextsQuery.new(current_user).result.map { |context|
  data[:datasets][0][:data].append(context.total)
  data[:labels].append(context.name)
}
options = {
	width: "400px",
	height: "400px",
	maintainAspectRatio: false,
	responsive: false,
	plugins: {
	  colorschemes: {
            scheme: 'brewer.Paired12'
	  }
        }
}
%>
<%= pie_chart data, options.merge({'title': {'display': true, 'text': 'Spread of actions for all contexts'}}) %>

<% data = {
  datasets: [{
    data: Array.new
  }],
  labels: Array.new
  }
Stats::TopContextsQuery.new(current_user, :running => true).result.map { |context|
  data[:datasets][0][:data].append(context.total)
  data[:labels].append(context.name)
}
%>
<%= pie_chart data, options.merge({'title': {'display': true, 'text': 'Spread of actions for visible contexts'}}) %>

<%= render :partial => 'contexts_list', :locals => {:contexts => contexts.actions, :key => 'contexts'} -%>

<%= render :partial => 'contexts_list', :locals => {:contexts => contexts.running_actions, :key => 'visible_contexts_with_incomplete_actions'} -%>