allow charts to have Y-axis min and max specified

app/assets/javascripts/updateChart.js

@@ -21,13 +21,11 @@ function updateChart(index,
     // default width and height
     var width = width;
     var height = height;
-    // get old src
 
+    // get old src
     var iframe = $('#iframe' + index).attr("default_src");
 
-    if (!iframe) {
+    if (!iframe) { iframe = $('#iframe' + index).attr('src'); }
-    iframe = $('#iframe' + index).attr('src');
-    }
 
     src = iframe.split('?')[0];
     // if bar or column chart, a timeslice should be present or set timescale=30
@@ -96,11 +94,7 @@ function setupChartForm(channelIndex) {
   };
 }
 
-
+function setupColumns(current_user, channel_id) {
-
-
-function setupColumns(current_user, channel_id)
-{
   $( sortColumnSetup(current_user, channel_id) );
   $( ".column" ).disableSelection();
 }

app/views/charts/_config.html.erb

@@ -144,6 +144,14 @@
       <td><%= t(:chart_max) %>: </td>
       <td><input type="text" class="chart_options<%= index %> shortfield" id="max_<%= index %>" /></td>
     </tr>
+    <tr>
+      <td><%= t(:chart_yaxis_min) %>: </td>
+      <td><input type="text" class="chart_options<%= index %> shortfield" id="yaxismin_<%= index %>" /></td>
+    </tr>
+    <tr>
+      <td><%= t(:chart_yaxis_max) %>: </td>
+      <td><input type="text" class="chart_options<%= index %> shortfield" id="yaxismax_<%= index %>" /></td>
+    </tr>
     <tr>
       <td><input type="button" id="button<%= index %>" value="<%= t(:chart_update) %>" /></td>
       <td></td>

app/views/charts/show.html.erb

@@ -151,7 +151,9 @@
           yAxis: {
             title: {
               text: ''
-              }
+            },
+            min: <%= params[:yaxismin].present? ? params[:yaxismin] : 'null '%>,
+            max: <%= params[:yaxismax].present? ? params[:yaxismax] : 'null' %>
           },
           exporting: {
               enabled: <%= (params[:export].present? && params[:export] == 'true') ? 'true' : 'false' %>

app/views/docs/charts.html.erb

@@ -33,6 +33,8 @@
       <li><b>dynamic</b> (true/false) Make chart update automatically every 15 seconds, default: false (optional)</li>
       <li><b>step</b> (true/false) Draw chart as a step chart, default: false (optional)</li>
       <li><b>export</b> (true/false) Show export buttons, so that chart can be saved as an image, default: false (optional)</li>
+      <li><b>yaxismin</b> (decimal) Minimum value of chart's Y-Axis; if blank the value is auto-calculated (optional)</li>
+      <li><b>yaxismax</b> (decimal) Maximum value of chart's Y-Axis; if blank the value is auto-calculated (optional)</li>
     </ul>
 
     <br>

config/locales/en.yml

@@ -70,8 +70,8 @@ en:
   channel_being_cleared: "This channel is currently being cleared. Any data you post to this channel before clearing is complete may be deleted."
   channel_video_type_blank: "Either Youtube, or Vimeo, is required if a Video ID is specified."
   chart: "Chart"
-  chart_max: "Max"
+  chart_max: "Data Max"
-  chart_min: "Min"
+  chart_min: "Data Min"
   chart_background_color: "Background"
   chart_is_dynamic: "Dynamic?"
   chart_embed_code: "Embed Code"
@@ -84,6 +84,8 @@ en:
   chart_update: "Update Chart"
   chart_xaxis: "X-Axis"
   chart_yaxis: "Y-Axis"
+  chart_yaxis_min: "Y-Axis Min"
+  chart_yaxis_max: "Y-Axis Max"
   charts: "Charts"
   charts_view: "View Charts"
   comment_add: "Add comment"