HoverLabels: Check for <= 0 error values for log axes

Author: mdtusz

src/plots/cartesian/graph_interact.js

@@ -628,7 +628,7 @@ fx.getClosest = function(cd, distfn, pointData) {
 };
 
 function cleanPoint(d, hovermode) {
-    d.posref = hovermode==='y' ? (d.x0+d.x1)/2 : (d.y0+d.y1)/2;
+    d.posref = hovermode === 'y' ? (d.x0 + d.x1) / 2 : (d.y0 + d.y1) / 2;
 
     // then constrain all the positions to be on the plot
     d.x0 = Lib.constrain(d.x0, 0, d.xa._length);
@@ -639,36 +639,36 @@ function cleanPoint(d, hovermode) {
     // and convert the x and y label values into objects
     // formatted as text, with font info
     var logOffScale;
-    if(d.xLabelVal!==undefined) {
-        logOffScale = (d.xa.type==='log' && d.xLabelVal<=0);
+    if(d.xLabelVal !== undefined) {
+        logOffScale = (d.xa.type === 'log' && d.xLabelVal <= 0);
         var xLabelObj = Axes.tickText(d.xa,
                 d.xa.c2l(logOffScale ? -d.xLabelVal : d.xLabelVal), 'hover');
         if(logOffScale) {
-            if(d.xLabelVal===0) d.xLabel = '0';
+            if(d.xLabelVal === 0) d.xLabel = '0';
             else d.xLabel = '-' + xLabelObj.text;
         }
         else d.xLabel = xLabelObj.text;
         d.xVal = d.xa.c2d(d.xLabelVal);
     }
 
-    if(d.yLabelVal!==undefined) {
-        logOffScale = (d.ya.type==='log' && d.yLabelVal<=0);
+    if(d.yLabelVal !== undefined) {
+        logOffScale = (d.ya.type === 'log' && d.yLabelVal <= 0);
         var yLabelObj = Axes.tickText(d.ya,
                 d.ya.c2l(logOffScale ? -d.yLabelVal : d.yLabelVal), 'hover');
         if(logOffScale) {
-            if(d.yLabelVal===0) d.yLabel = '0';
+            if(d.yLabelVal === 0) d.yLabel = '0';
             else d.yLabel = '-' + yLabelObj.text;
         }
         else d.yLabel = yLabelObj.text;
         d.yVal = d.ya.c2d(d.yLabelVal);
     }
 
-    if(d.zLabelVal!==undefined) d.zLabel = String(d.zLabelVal);
+    if(d.zLabelVal !== undefined) d.zLabel = String(d.zLabelVal);
 
     // for box means and error bars, add the range to the label
-    if(d.xerr!==undefined) {
+    if(!isNaN(d.xerr) && !(d.xa.type === 'log' && d.xerr <= 0)) {
         var xeText = Axes.tickText(d.xa, d.xa.c2l(d.xerr), 'hover').text;
-        if(d.xerrneg!==undefined) {
+        if(d.xerrneg !== undefined) {
             d.xLabel += ' +' + xeText + ' / -' +
                 Axes.tickText(d.xa, d.xa.c2l(d.xerrneg), 'hover').text;
         }
@@ -677,27 +677,27 @@ function cleanPoint(d, hovermode) {
         // small distance penalty for error bars, so that if there are
         // traces with errors and some without, the error bar label will
         // hoist up to the point
-        if(hovermode==='x') d.distance += 1;
+        if(hovermode === 'x') d.distance += 1;
     }
-    if(d.yerr!==undefined) {
+    if(!isNaN(d.yerr) && !(d.ya.type === 'log' && d.yerr <= 0)) {
         var yeText = Axes.tickText(d.ya, d.ya.c2l(d.yerr), 'hover').text;
-        if(d.yerrneg!==undefined) {
+        if(d.yerrneg !== undefined) {
             d.yLabel += ' +' + yeText + ' / -' +
                 Axes.tickText(d.ya, d.ya.c2l(d.yerrneg), 'hover').text;
         }
         else d.yLabel += ' &plusmn; ' + yeText;
 
-        if(hovermode==='y') d.distance += 1;
+        if(hovermode === 'y') d.distance += 1;
     }
 
     var infomode = d.trace.hoverinfo;
-    if(infomode!=='all') {
+    if(infomode !== 'all') {
         infomode = infomode.split('+');
-        if(infomode.indexOf('x')===-1) d.xLabel = undefined;
-        if(infomode.indexOf('y')===-1) d.yLabel = undefined;
-        if(infomode.indexOf('z')===-1) d.zLabel = undefined;
-        if(infomode.indexOf('text')===-1) d.text = undefined;
-        if(infomode.indexOf('name')===-1) d.name = undefined;
+        if(infomode.indexOf('x') === -1) d.xLabel = undefined;
+        if(infomode.indexOf('y') === -1) d.yLabel = undefined;
+        if(infomode.indexOf('z') === -1) d.zLabel = undefined;
+        if(infomode.indexOf('text') === -1) d.text = undefined;
+        if(infomode.indexOf('name') === -1) d.name = undefined;
     }
     return d;
 }

test/jasmine/tests/hover_label_test.js

@@ -214,6 +214,60 @@ describe('hover info', function() {
         });
     });
 
+    describe('hover error x text (log axis positive)', function() {
+        var mockCopy = Lib.extendDeep({}, mock);
+
+        mockCopy.data[0].error_x = { array: [] };
+        mockCopy.data[0].error_x.array[17] = 1;
+
+        beforeEach(function(done) {
+            Plotly.plot(createGraphDiv(), mockCopy.data, mockCopy.layout).then(done);
+        });
+
+        it('responds to hover x+text', function() {
+            Fx.hover('graph', evt, 'xy');
+
+            expect(d3.selectAll('g.axistext').size()).toEqual(1);
+            expect(d3.selectAll('g.axistext').select('text').html()).toEqual('0.388 ± 1');
+        });
+    });
+
+    describe('hover error text (log axis 0)', function() {
+        var mockCopy = Lib.extendDeep({}, mock);
+
+        mockCopy.data[0].error_x = { array: [] };
+        mockCopy.data[0].error_x.array[17] = 0;
+
+        beforeEach(function(done) {
+            Plotly.plot(createGraphDiv(), mockCopy.data, mockCopy.layout).then(done);
+        });
+
+        it('responds to hover x+text', function() {
+            Fx.hover('graph', evt, 'xy');
+
+            expect(d3.selectAll('g.axistext').size()).toEqual(1);
+            expect(d3.selectAll('g.axistext').select('text').html()).toEqual('0.388');
+        });
+    });
+
+    describe('hover error text (log axis negative)', function() {
+        var mockCopy = Lib.extendDeep({}, mock);
+
+        mockCopy.data[0].error_x = { array: [] };
+        mockCopy.data[0].error_x.array[17] = -1;
+
+        beforeEach(function(done) {
+            Plotly.plot(createGraphDiv(), mockCopy.data, mockCopy.layout).then(done);
+        });
+
+        it('responds to hover x+text', function() {
+            Fx.hover('graph', evt, 'xy');
+
+            expect(d3.selectAll('g.axistext').size()).toEqual(1);
+            expect(d3.selectAll('g.axistext').select('text').html()).toEqual('0.388');
+        });
+    });
+
     describe('hover info text with html', function() {
         var mockCopy = Lib.extendDeep({}, mock);