From 92ddb48380025579b4492f6f8bc76d64e13d4b51 Mon Sep 17 00:00:00 2001
From: Matt Traynham <mrt6467@alum.uncw.edu>
Date: Wed, 25 Mar 2015 16:57:12 -0400
Subject: [PATCH] Attempt at non-filtered brushing

---
 src/coordinate-grid-mixin.js | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/src/coordinate-grid-mixin.js b/src/coordinate-grid-mixin.js
index 658c0d869..e7ee55a76 100644
--- a/src/coordinate-grid-mixin.js
+++ b/src/coordinate-grid-mixin.js
@@ -74,6 +74,7 @@ dc.coordinateGridMixin = function (_chart) {
 
     var _brush = d3.svg.brush();
     var _brushOn = true;
+    var _filterOnBrushEnd = false;
     var _round;
 
     var _renderHorizontalGridLine = false;
@@ -842,7 +843,13 @@ dc.coordinateGridMixin = function (_chart) {
 
     _chart.renderBrush = function (g) {
         if (_brushOn) {
-            _brush.on('brush', _chart._brushing);
+            if (!_filterOnBrushEnd) {
+                _brush.on('brush', _chart._brushing);
+                _brush.on('brushend.filter', null);
+            } else {
+                _brush.on('brush', _chart._nonFilteredBrushing);
+                _brush.on('brushend.filter', _chart._brushing);
+            }
             _brush.on('brushstart', _chart._disableMouseZoom);
             _brush.on('brushend', configureMouseZoom);
 
@@ -903,6 +910,11 @@ dc.coordinateGridMixin = function (_chart) {
         }
     };
 
+    _chart._nonFilteredBrushing = function () {
+        _chart.extendBrush();
+        _chart.redrawBrush(_g);
+    };
+
     _chart.redrawBrush = function (g) {
         if (_brushOn) {
             if (_chart.filter() && _chart.brush().empty()) {
@@ -1131,10 +1143,27 @@ dc.coordinateGridMixin = function (_chart) {
         if (!arguments.length) {
             return _brushOn;
         }
+        if (_brushOn !== _ && _chart.hasFilter()) {
+            _chart.filterAll();
+        }
         _brushOn = _;
         return _chart;
     };
 
+    /**
+     #### .filterOnBrushEnd([boolean])
+     Allows one to specify when the brush filtering should be performed.  If this is false,
+     filtering happens at every move of the brush.  If this is true, filtering occurs when the
+     brush is dropped.  Default: false
+     */
+    _chart.filterOnBrushEnd = function (_) {
+        if (!arguments.length) {
+            return _filterOnBrushEnd;
+        }
+        _filterOnBrushEnd = _;
+        return _chart;
+    };
+
     function hasRangeSelected(range) {
         return range instanceof Array && range.length > 1;
     }