Fixed horizontal and vertical line drawing.

src/html/index.html

@@ -145,6 +145,7 @@
     <script type="text/javascript" src="jqplot/plugins/jqplot.ohlcRenderer.min.js"></script>
     <script type="text/javascript" src="jqplot/plugins/jqplot.pieRenderer.min.js"></script>
     <script type="text/javascript" src="jqplot/plugins/jqplot.highlighter.min.js"></script>
+    <script type="text/javascript" src="jqplot/plugins/jqplot.canvasOverlay.min.js"></script>
 
     <script type="text/javascript" src="js/entries.js"></script>
   </body>

src/html/js/entries.js

@@ -379,18 +379,9 @@ drawChart = function(entries, element) {
   $(element).html("");
 
   if(entries && entries.length > 0) {
-    var day = 24 * 60 * 60 * 1000;
-
-    var lastDate = new Date(Date.parse(entries[entries.length -1][0]).valueOf() + 1 * day);
-    var firstDate = new Date(Date.parse(entries[0][0]).valueOf() - 1 * day);
     var chartValues = [[], []];
 
-    // For the '0' line.
-    chartValues[0].push(
-      [new Date(firstDate.valueOf()).toString(), 0],
-      [new Date(lastDate.valueOf()).toString(), 0]);
-
-    chartValues[1] = entries;
+    chartValues[0] = entries;
 
     // plot chart
     window.chart = $.jqplot(element.id, chartValues, {
@@ -411,16 +402,27 @@ drawChart = function(entries, element) {
         },
 
         series: [{
-          linePattern: "dashed",
-          lineWidth: 1,
-          color: "red",
-          showMarker: false
-        },{
           renderer:$.jqplot.OHLCRenderer,
           color: "blue",
           lineWidth: 3,
-          rendererOptions:{
-        }}],
+          rendererOptions:{}
+        }],
+        canvasOverlay: {
+          show: true,
+          objects: [{
+            dashedHorizontalLine: {
+              name: "zero",
+              y: 0,
+              lineWidth: 1,
+              color: "red"
+            }},
+            { dashedVerticalLine: {
+              name: "today",
+              x: new Date(),
+              lineWidth: 1,
+              color: "gray"
+            }}]
+        }
     });
   } else {
     window.chart = null;