Rebased to master to include latest changes

updated the getFlotPairs() function to only check before and after a value, adding only enough zeros to maintain line graphs.

panels/histogram/module.js

@@ -342,8 +342,19 @@ angular.module('kibana.histogram', [])
                   lineWidth: scope.panel.linewidth,
                   steps: false
                 },
-                bars:   { show: scope.panel.bars,  fill: 1, lineWidth:0, barWidth: barwidth/1.7, zero: false },
-                points: { show: scope.panel.points, fill: 1, fillColor: false, radius: 5},
+                bars:   {
+                  show: scope.panel.bars,
+                  fill: 1,
+                  barWidth: barwidth/1.8,
+                  zero: false,
+                  lineWidth: 0
+                },
+                points: {
+                  show: scope.panel.points,
+                  fill: 1,
+                  fillColor: false,
+                  radius: 5
+                },
                 shadowSize: 1
               },
               yaxis: {
@@ -486,23 +497,32 @@ angular.module('kibana.histogram', [])
   this.ZeroFilled.prototype.getFlotPairs = function () {
     // var startTime = performance.now();
     var times = _.map(_.keys(this._data), base10Int).sort(),
-      result = [],
-      i,
-      next,
-      expected_next;
-    for(i = 0; i < times.length; i++) {
-      result.push([ times[i], this._data[times[i]] ]);
+      result = [];
+    _.each(times, function (time, i, times) {
+      var next, expected_next, prev, expected_prev;
+
+      // check for previous measurement
+      if (i > 0) {
+        prev = times[i - 1];
+        expected_prev = time - this.interval_ms;
+        if (prev < expected_prev) {
+          result.push([expected_prev, 0]);
+        }
+      }
+
+      // add the current time
+      result.push([ time, this._data[time] ]);
+
+      // check for next measurement
+      if (times.length > i) {
         next = times[i + 1];
-      expected_next = times[i] + this.interval_ms;
-      for(; times.length > i && next > expected_next; expected_next+= this.interval_ms) {
-        /**
-         * since we don't know how the server will round subsequent segments
-         * we have to recheck for blanks each time.
-         */
-        // this._data[expected_next] = 0;
+        expected_next = time + this.interval_ms;
+        if (next > expected_next) {
           result.push([expected_next, 0]);
         }
       }
+
+    }, this);
     // console.log(Math.round((performance.now() - startTime)*100)/100, 'ms to get', result.length, 'pairs');
     return result;
   };