Added second parameter to labelFormatter for legend

git-svn-id: https://flot.googlecode.com/svn/trunk@140 1e0a6537-2640-0410-bfb7-f154510ff394

API.txt

@@ -127,7 +127,7 @@ Customizing the legend
 
   legend: {
     show: boolean
-    labelFormatter: null or (fn: string -> string)
+    labelFormatter: null or (fn: string, series object -> string)
     labelBoxBorderColor: color
     noColumns: number
     position: "ne" or "nw" or "se" or "sw"
@@ -143,8 +143,9 @@ the labels in some way, e.g. make them to links, you can pass in a
 function for "labelFormatter". Here's an example that makes them
 clickable:
 
-  labelFormatter: function(label) {
-    return '<a href="' + label + '">' + label + '</a>';
+  labelFormatter: function(label, series) {
+    // series is the series object for the label
+    return '<a href="#' + label + '">' + label + '</a>';
   }
 
 "noColumns" is the number of columns to divide the legend table into.

NEWS.txt

@@ -52,7 +52,9 @@ Changes:
 - Thresholding: you can set a threshold and a color, and the data
   points below that threshold will then get the color. Useful for
   marking data below 0, for instance.
-  
+
+- The legend labelFormatter now passes the series in addition to just
+  the label (suggestion by Vincent Lemeltier).
 
 Bug fixes:
 

jquery.flot.js

@@ -1583,10 +1583,12 @@
             if (!options.legend.show)
                 return;
             
-            var fragments = [];
-            var rowStarted = false;
+            var fragments = [], rowStarted = false,
+                lf = options.legend.labelFormatter, s, label;
             for (i = 0; i < series.length; ++i) {
-                if (!series[i].label)
+                s = series[i];
+                label = s.label;
+                if (!label)
                     continue;
                 
                 if (i % options.legend.noColumns == 0) {
@@ -1596,12 +1598,11 @@
                     rowStarted = true;
                 }
 
-                var label = series[i].label;
-                if (options.legend.labelFormatter != null)
-                    label = options.legend.labelFormatter(label);
+                if (lf)
+                    label = lf(label, s);
                 
                 fragments.push(
-                    '<td class="legendColorBox"><div style="border:1px solid ' + options.legend.labelBoxBorderColor + ';padding:1px"><div style="width:4px;height:0;border:5px solid ' + series[i].color + ';overflow:hidden"></div></div></td>' +
+                    '<td class="legendColorBox"><div style="border:1px solid ' + options.legend.labelBoxBorderColor + ';padding:1px"><div style="width:4px;height:0;border:5px solid ' + s.color + ';overflow:hidden"></div></div></td>' +
                     '<td class="legendLabel">' + label + '</td>');
             }
             if (rowStarted)