add hovertemplate to heatmap, contour, histogram2d, histogram2dcontour

Author: etpinard

src/traces/contour/attributes.js

@@ -35,6 +35,7 @@ module.exports = extendFlat({
     xtype: heatmapAttrs.xtype,
     ytype: heatmapAttrs.ytype,
     zhoverformat: heatmapAttrs.zhoverformat,
+    hovertemplate: heatmapAttrs.hovertemplate,
 
     connectgaps: heatmapAttrs.connectgaps,
 
@@ -247,7 +248,7 @@ module.exports = extendFlat({
             ].join(' ')
         }),
         editType: 'plot'
-    }
+    },
 },
     colorscaleAttrs('', {
         cLetter: 'z',

src/traces/contour/defaults.js

@@ -6,7 +6,6 @@
 * LICENSE file in the root directory of this source tree.
 */
 
-
 'use strict';
 
 var Lib = require('../../lib');
@@ -34,6 +33,8 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     }
 
     coerce('text');
+    coerce('hovertemplate');
+
     var isConstraint = (coerce('contours.type') === 'constraint');
     coerce('connectgaps', Lib.isArray1D(traceOut.z));
 

src/traces/heatmap/attributes.js

@@ -9,6 +9,7 @@
 'use strict';
 
 var scatterAttrs = require('../scatter/attributes');
+var hovertemplateAttrs = require('../../components/fx/hovertemplate_attributes');
 var colorscaleAttrs = require('../../components/colorscale/attributes');
 var colorbarAttrs = require('../../components/colorbar/attributes');
 
@@ -111,6 +112,8 @@ module.exports = extendFlat({
             'https://github.com/d3/d3-format/blob/master/README.md#locale_format'
         ].join(' ')
     },
+    hovertemplate: hovertemplateAttrs()
+}, {
     transforms: undefined
 },
     colorscaleAttrs('', {

src/traces/heatmap/defaults.js

@@ -29,6 +29,7 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     }
 
     coerce('text');
+    coerce('hovertemplate');
 
     handleStyleDefaults(traceIn, traceOut, coerce, layout);
 

src/traces/histogram/event_data.js

@@ -13,6 +13,9 @@ module.exports = function eventData(out, pt, trace, cd, pointNumber) {
     out.x = 'xVal' in pt ? pt.xVal : pt.x;
     out.y = 'yVal' in pt ? pt.yVal : pt.y;
 
+    // for 2d histograms
+    if('zLabelVal' in pt) out.z = pt.zLabelVal;
+
     if(pt.xa) out.xaxis = pt.xa;
     if(pt.ya) out.yaxis = pt.ya;
 

src/traces/histogram2d/attributes.js

@@ -11,6 +11,7 @@
 var histogramAttrs = require('../histogram/attributes');
 var makeBinAttrs = require('../histogram/bin_attributes');
 var heatmapAttrs = require('../heatmap/attributes');
+var hovertemplateAttrs = require('../../components/fx/hovertemplate_attributes');
 var colorscaleAttrs = require('../../components/colorscale/attributes');
 var colorbarAttrs = require('../../components/colorbar/attributes');
 
@@ -47,7 +48,8 @@ module.exports = extendFlat(
         xgap: heatmapAttrs.xgap,
         ygap: heatmapAttrs.ygap,
         zsmooth: heatmapAttrs.zsmooth,
-        zhoverformat: heatmapAttrs.zhoverformat
+        zhoverformat: heatmapAttrs.zhoverformat,
+        hovertemplate: hovertemplateAttrs({}, {keys: 'z'})
     },
     colorscaleAttrs('', {
         cLetter: 'z',

src/traces/histogram2d/defaults.js

@@ -29,4 +29,5 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     colorscaleDefaults(
         traceIn, traceOut, layout, coerce, {prefix: '', cLetter: 'z'}
     );
+    coerce('hovertemplate');
 };

src/traces/histogram2dcontour/attributes.js

@@ -34,7 +34,8 @@ module.exports = extendFlat({
     ncontours: contourAttrs.ncontours,
     contours: contourAttrs.contours,
     line: contourAttrs.line,
-    zhoverformat: histogram2dAttrs.zhoverformat
+    zhoverformat: histogram2dAttrs.zhoverformat,
+    hovertemplate: histogram2dAttrs.hovertemplate
 },
     colorscaleAttrs('', {
         cLetter: 'z',

src/traces/histogram2dcontour/defaults.js

@@ -31,4 +31,5 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
 
     handleContoursDefaults(traceIn, traceOut, coerce, coerce2);
     handleStyleDefaults(traceIn, traceOut, coerce, layout);
+    coerce('hovertemplate');
 };

src/traces/scattercarpet/attributes.js

@@ -10,6 +10,7 @@
 
 var scatterAttrs = require('../scatter/attributes');
 var plotAttrs = require('../../plots/attributes');
+var hovertemplateAttrs = require('../../components/fx/hovertemplate_attributes');
 var colorAttributes = require('../../components/colorscale/attributes');
 var colorbarAttrs = require('../../components/colorbar/attributes');
 
@@ -118,4 +119,5 @@ module.exports = {
         flags: ['a', 'b', 'text', 'name']
     }),
     hoveron: scatterAttrs.hoveron,
+    hovertemplate: hovertemplateAttrs()
 };