Adding back stack percentage for histogram

Conflicts:
	panels/histogram/module.js

src/app/components/require.config.js

@@ -32,6 +32,7 @@ require.config({
     'jquery.flot.pie':        '../vendor/jquery/jquery.flot.pie',
     'jquery.flot.selection':  '../vendor/jquery/jquery.flot.selection',
     'jquery.flot.stack':      '../vendor/jquery/jquery.flot.stack',
+    'jquery.flot.stackpercent':'../vendor/jquery/jquery.flot.stackpercent',
     'jquery.flot.time':       '../vendor/jquery/jquery.flot.time',
 
     modernizr:                '../vendor/modernizr-2.6.1',
@@ -64,6 +65,7 @@ require.config({
     'jquery.flot.pie':      ['jquery', 'jquery.flot'],
     'jquery.flot.selection':['jquery', 'jquery.flot'],
     'jquery.flot.stack':    ['jquery', 'jquery.flot'],
+    'jquery.flot.stackpercent':['jquery', 'jquery.flot'],
     'jquery.flot.time':     ['jquery', 'jquery.flot'],
 
     'angular-sanitize':     ['angular'],
@@ -81,4 +83,4 @@ require.config({
 
     elasticjs:              ['angular', '../vendor/elasticjs/elastic']
   }
-});
+});

src/app/panels/histogram/editor.html

@@ -21,7 +21,7 @@
     <div class="span1"> <label class="small">Lines</label><input type="checkbox" ng-model="panel.lines" ng-checked="panel.lines"></div>
     <div class="span1"> <label class="small">Points</label><input type="checkbox" ng-model="panel.points" ng-checked="panel.points"></div>
     <div class="span1"> <label class="small">Stack</label><input type="checkbox" ng-model="panel.stack" ng-checked="panel.stack"></div>
-    <!--<div class="span1" ng-show="panel.stack">Percent <tip>Stack as a percentage of total</tip></label><input type="checkbox"  ng-model="panel.percentage" ng-checked="panel.percentage"></div>-->
+    <div class="span1" ng-show="panel.stack">Percent <tip>Stack as a percentage of total</tip></label><input type="checkbox"  ng-model="panel.percentage" ng-checked="panel.percentage"></div>
     <div class="span1"> <label class="small">Legend</label><input type="checkbox" ng-model="panel.legend" ng-checked="panel.legend"></div>
     <div class="span1"> <label class="small">xAxis</label><input type="checkbox" ng-model="panel['x-axis']" ng-checked="panel['x-axis']"></div>
     <div class="span1"> <label class="small">yAxis</label><input type="checkbox" ng-model="panel['y-axis']" ng-checked="panel['y-axis']"></div>
@@ -69,4 +69,4 @@
       <label class="small">Display Query <tip>If an alias is set, it will be shown in the tooltip. If not, should it show the query?</tip></label>
       <input type="checkbox" ng-model="panel.tooltip.query_as_alias" />
     </div>
-  </div>
+  </div>

src/app/panels/histogram/module.js

@@ -40,7 +40,8 @@ define([
   'jquery.flot.pie',
   'jquery.flot.selection',
   'jquery.flot.time',
-  'jquery.flot.stack'
+  'jquery.flot.stack',
+  'jquery.flot.stackpercent'
 ],
 function (angular, app, $, _, kbn, moment, timeSeries) {
 
@@ -348,7 +349,7 @@ function (angular, app, $, _, kbn, moment, timeSeries) {
             var options = {
               legend: { show: false },
               series: {
-                //stackpercent: scope.panel.stack ? scope.panel.percentage : false,
+                stackpercent: scope.panel.stack ? scope.panel.percentage : false,
                 stack: scope.panel.percentage ? null : stack,
                 lines:  {
                   show: scope.panel.lines,
@@ -472,4 +473,4 @@ function (angular, app, $, _, kbn, moment, timeSeries) {
     };
   });
 
-});
+});

src/vendor/jquery/jquery.flot.stackpercent.js

@@ -0,0 +1,126 @@
+(function ($) {
+    var options = {
+        series: {
+            stackpercent: null
+        } // or number/string
+    };
+
+    function init(plot) {
+
+        // will be built up dynamically as a hash from x-value, or y-value if horizontal
+        var stackBases = {};
+        var processed = false;
+        var stackSums = {};
+
+        //set percentage for stacked chart
+        function processRawData(plot, series, data, datapoints) {
+            if (!processed) {
+                processed = true;
+                stackSums = getStackSums(plot.getData());
+            }
+			if (series.stackpercent == true) {
+				var num = data.length;
+				series.percents = [];
+				var key_idx = 0;
+				var value_idx = 1;
+				if (series.bars && series.bars.horizontal && series.bars.horizontal === true) {
+					key_idx = 1;
+					value_idx = 0;
+				}
+				for (var j = 0; j < num; j++) {
+					var sum = stackSums[data[j][key_idx] + ""];
+					if (sum > 0) {
+						series.percents.push(data[j][value_idx] * 100 / sum);
+					} else {
+						series.percents.push(0);
+					}
+				}
+			}
+        }
+
+        //calculate summary
+        function getStackSums(_data) {
+            var data_len = _data.length;
+            var sums = {};
+            if (data_len > 0) {
+                //caculate summary
+                for (var i = 0; i < data_len; i++) {
+                    if (_data[i].stackpercent) {
+						var key_idx = 0;
+						var value_idx = 1;
+						if (_data[i].bars && _data[i].bars.horizontal && _data[i].bars.horizontal === true) {
+							key_idx = 1;
+							value_idx = 0;
+						}
+                        var num = _data[i].data.length;
+                        for (var j = 0; j < num; j++) {
+                            var value = 0;
+                            if (_data[i].data[j][1] != null) {
+                                value = _data[i].data[j][value_idx];
+                            }
+                            if (sums[_data[i].data[j][key_idx] + ""]) {
+                                sums[_data[i].data[j][key_idx] + ""] += value;
+                            } else {
+                                sums[_data[i].data[j][key_idx] + ""] = value;
+                            }
+
+                        }
+                    }
+                }
+            }
+            return sums;
+        }
+
+        function stackData(plot, s, datapoints) {
+            if (!s.stackpercent) return;
+            if (!processed) {
+                stackSums = getStackSums(plot.getData());
+            }
+            var newPoints = [];
+			
+			
+			var key_idx = 0;
+			var value_idx = 1;
+			if (s.bars && s.bars.horizontal && s.bars.horizontal === true) {
+				key_idx = 1;
+				value_idx = 0;
+			}
+
+			for (var i = 0; i < datapoints.points.length; i += 3) {
+				// note that the values need to be turned into absolute y-values.
+				// in other words, if you were to stack (x, y1), (x, y2), and (x, y3),
+				// (each from different series, which is where stackBases comes in),
+				// you'd want the new points to be (x, y1, 0), (x, y1+y2, y1), (x, y1+y2+y3, y1+y2)
+				// generally, (x, thisValue + (base up to this point), + (base up to this point))
+				if (!stackBases[datapoints.points[i + key_idx]]) {
+					stackBases[datapoints.points[i + key_idx]] = 0;
+				}
+				newPoints[i + key_idx] = datapoints.points[i + key_idx];
+				newPoints[i + value_idx] = datapoints.points[i + value_idx] + stackBases[datapoints.points[i + key_idx]];
+				newPoints[i + 2] = stackBases[datapoints.points[i + key_idx]];
+				stackBases[datapoints.points[i + key_idx]] += datapoints.points[i + value_idx];
+				// change points to percentage values
+				// you may need to set yaxis:{ max = 100 }
+				if ( stackSums[newPoints[i+key_idx]+""] > 0 ){
+					newPoints[i + value_idx] = newPoints[i + value_idx] * 100 / stackSums[newPoints[i + key_idx] + ""];
+					newPoints[i + 2] = newPoints[i + 2] * 100 / stackSums[newPoints[i + key_idx] + ""];
+				} else {
+					newPoints[i + value_idx] = 0;
+					newPoints[i + 2] = 0;
+				}
+			}
+
+            datapoints.points = newPoints;
+        }
+
+		plot.hooks.processRawData.push(processRawData);
+        plot.hooks.processDatapoints.push(stackData);
+    }
+
+    $.plot.plugins.push({
+        init: init,
+        options: options,
+        name: 'stackpercent',
+        version: '0.1'
+    });
+})(jQuery);