move renderTitles closer to where it's used

and rename it so it's not clashing with the option
and perhaps more consistent with some imagined consistency

for #1200

Author: gordonwoodhull

src/scatter-plot.js

@@ -78,7 +78,7 @@ dc.scatterPlot = function (parent, chartGroup) {
             .attr('fill', _chart.getColor)
             .attr('transform', _locator);
 
-        symbols.call(renderTitle, _chart.data());
+        symbols.call(renderTitles, _chart.data());
 
         symbols.each(function (d, i) {
             _filtered[i] = !_chart.filter() || _chart.filter().isFiltered([d.key[0], d.key[1]]);
@@ -110,6 +110,15 @@ dc.scatterPlot = function (parent, chartGroup) {
             .attr('opacity', 0).remove();
     };
 
+    function renderTitles (symbol, d) {
+        if (_chart.renderTitle()) {
+            symbol.selectAll('title').remove();
+            symbol.append('title').text(function (d) {
+                return _chart.title()(d);
+            });
+        }
+    }
+
     /**
      * Get or set the existence accessor.  If a point exists, it is drawn with
      * {@link dc.scatterPlot#symbolSize symbolSize} radius and
@@ -260,15 +269,6 @@ dc.scatterPlot = function (parent, chartGroup) {
         return _chart;
     };
 
-    function renderTitle (symbol, d) {
-        if (_chart.renderTitle()) {
-            symbol.selectAll('title').remove();
-            symbol.append('title').text(function (d) {
-                return _chart.title()(d);
-            });
-        }
-    }
-
     /**
      * Set or get color for symbols when the group is empty. If null, just use the
      * {@link dc.colorMixin#colors colorMixin.colors} color scale zero value.