diff --git a/plottable.js b/plottable.js
index c7c9948ea8..58b5523643 100644
--- a/plottable.js
+++ b/plottable.js
@@ -5651,12 +5651,12 @@ var Plottable;
                     _this._bars.classed("hover", false);
                     _this.deselectAll();
 
-                    var fullExtent = { min: 0, max: Infinity };
+                    var fullExtent = { min: -Infinity, max: Infinity };
                     var selectX = (_this._isVertical) ? p.x : fullExtent;
                     var selectY = (_this._isVertical) ? fullExtent : p.y;
                     var bar = _this.selectBar(selectX, selectY, true);
                     if (bar != null) {
-                        _this._drawTooltip(_this._getTooltipText(bar), 0, 0);
+                        _this._drawTooltip(_this._getTooltipText(bar.data()[0]), 0, 0);
                         _this._bars.classed("hover", true);
                     }
                 });
@@ -5675,14 +5675,14 @@ var Plottable;
                 return this;
             };
 
-            BarPlot.prototype._getTooltipText = function (bar) {
+            BarPlot.prototype._getTooltipText = function (datum) {
                 var textProjector = this._projectors["tooltip-text"];
                 if (textProjector == null) {
                     return "";
                 }
 
                 var tooltipTextFunction = Plottable.Util.Methods.applyAccessor(textProjector.accessor, this._dataSource);
-                return tooltipTextFunction(bar.data()[0], null);
+                return tooltipTextFunction(datum, null);
             };
 
             BarPlot.prototype._drawTooltip = function (text, rootX, rootY) {
@@ -5715,18 +5715,14 @@ var Plottable;
                 this._tooltip.style("visibility", "hidden");
             };
 
-            BarPlot.prototype._paint = function () {
+            BarPlot.prototype._computeLayout = function (xOffset, yOffset, availableWidth, availableHeight) {
                 var _this = this;
-                _super.prototype._paint.call(this);
-
-                this._bars = this.renderArea.selectAll("rect").data(this._dataSource.data());
-                this._bars.enter().append("rect");
+                _super.prototype._computeLayout.call(this, xOffset, yOffset, availableWidth, availableHeight);
 
                 // adjust space for tooltip, if necessary
                 if (this._showTooltip()) {
-                    var tooltipHeights = this._bars[0].map(function (barEl) {
-                        var bar = d3.select(barEl);
-                        _this._drawTooltip(_this._getTooltipText(bar), 0, 0);
+                    var tooltipHeights = this._dataSource.data().map(function (datum) {
+                        _this._drawTooltip(_this._getTooltipText(datum), 0, 0);
                         var bbox = Plottable.Util.DOM.getBBox(_this._tooltip);
                         return bbox.height;
                     });
@@ -5738,6 +5734,15 @@ var Plottable;
                     this.yScale.range(yRange);
                 }
 
+                return this;
+            };
+
+            BarPlot.prototype._paint = function () {
+                _super.prototype._paint.call(this);
+
+                this._bars = this.renderArea.selectAll("rect").data(this._dataSource.data());
+                this._bars.enter().append("rect");
+
                 var primaryScale = this._isVertical ? this.yScale : this.xScale;
                 var scaledBaseline = primaryScale.scale(this._baselineValue);
                 var positionAttr = this._isVertical ? "y" : "x";
diff --git a/quicktests/html/overlappingTickLabels-quicktest.html b/quicktests/html/overlappingTickLabels-quicktest.html
index 1c4ac9806c..40b6fee9ea 100644
--- a/quicktests/html/overlappingTickLabels-quicktest.html
+++ b/quicktests/html/overlappingTickLabels-quicktest.html
@@ -57,7 +57,7 @@
 
       var yScale2 = new Plottable.Scale.Ordinal().rangeType("bands");
       var yAxis2 = new Plottable.Axis.Category(yScale2, "left");
-      window.yAxis = yAxis2;
+      // window.yAxis = yAxis2;
 
       var horizBarPlot = new Plottable.Plot.HorizontalBar(ds, xScale2, yScale2)
                               .project("x", "age", xScale2)
diff --git a/src/components/plots/abstractBarPlot.ts b/src/components/plots/abstractBarPlot.ts
index 9581227746..7c8200e205 100644
--- a/src/components/plots/abstractBarPlot.ts
+++ b/src/components/plots/abstractBarPlot.ts
@@ -66,12 +66,12 @@ export module Abstract {
         this._bars.classed("hover", false);
         this.deselectAll();
 
-        var fullExtent: IExtent = { min: 0, max:Infinity };
+        var fullExtent: IExtent = { min: -Infinity, max: Infinity };
         var selectX: any = (this._isVertical) ? p.x : fullExtent;
         var selectY: any = (this._isVertical) ? fullExtent : p.y;
         var bar = this.selectBar(selectX, selectY, true);
         if (bar != null) {
-          this._drawTooltip(this._getTooltipText(bar), 0, 0);
+          this._drawTooltip(this._getTooltipText(bar.data()[0]), 0, 0);
           this._bars.classed("hover", true);
         }
       });
@@ -90,14 +90,14 @@ export module Abstract {
       return this;
     }
 
-    public _getTooltipText(bar: D3.Selection) {
+    public _getTooltipText(datum: any) {
       var textProjector = this._projectors["tooltip-text"];
       if (textProjector == null) {
         return "";
       }
 
       var tooltipTextFunction = Util.Methods.applyAccessor(textProjector.accessor, this._dataSource);
-      return tooltipTextFunction(bar.data()[0], null);
+      return tooltipTextFunction(datum, null);
     }
 
     public _drawTooltip(text: string, rootX: number, rootY: number) {
@@ -133,17 +133,13 @@ export module Abstract {
       this._tooltip.style("visibility", "hidden");
     }
 
-    public _paint() {
-      super._paint();
-
-      this._bars = this.renderArea.selectAll("rect").data(this._dataSource.data());
-      this._bars.enter().append("rect");
+    public _computeLayout(xOffset?: number, yOffset?: number, availableWidth?: number, availableHeight?: number) {
+      super._computeLayout(xOffset, yOffset, availableWidth, availableHeight);
 
       // adjust space for tooltip, if necessary
       if (this._showTooltip()) {
-        var tooltipHeights: number[] = this._bars[0].map((barEl: any) => {
-          var bar = d3.select(barEl);
-          this._drawTooltip(this._getTooltipText(bar), 0, 0);
+        var tooltipHeights: number[] = this._dataSource.data().map((datum: any) => {
+          this._drawTooltip(this._getTooltipText(datum), 0, 0);
           var bbox = Util.DOM.getBBox(this._tooltip);
           return bbox.height;
         });
@@ -155,6 +151,15 @@ export module Abstract {
         this.yScale.range(yRange);
       }
 
+      return this;
+    }
+
+    public _paint() {
+      super._paint();
+
+      this._bars = this.renderArea.selectAll("rect").data(this._dataSource.data());
+      this._bars.enter().append("rect");
+
       var primaryScale = this._isVertical ? this.yScale : this.xScale;
       var scaledBaseline = primaryScale.scale(this._baselineValue);
       var positionAttr = this._isVertical ? "y" : "x";
diff --git a/src/interactions/mouseInteraction.ts b/src/interactions/mouseInteraction.ts
index 5af9745894..5988ab6fee 100644
--- a/src/interactions/mouseInteraction.ts
+++ b/src/interactions/mouseInteraction.ts
@@ -19,7 +19,7 @@ export module Interaction {
           var p: Point = {
             x: xy[0],
             y: xy[1]
-          }
+          };
           this._mouseover(p);
         }
       });
@@ -29,7 +29,7 @@ export module Interaction {
           var p: Point = {
             x: xy[0],
             y: xy[1]
-          }
+          };
           this._mousemove(p);
         }
       });
@@ -39,7 +39,7 @@ export module Interaction {
           var p: Point = {
             x: xy[0],
             y: xy[1]
-          }
+          };
           this._mouseout(p);
         }
       });