Add range attribute and default to rangeslider

Author: mdtusz

src/components/rangeslider/attributes.js

@@ -30,6 +30,22 @@ module.exports = {
         role: 'style',
         description: 'Sets the border color of the range slider.'
     },
+    range: {
+        valType: 'info_array',
+        role: 'info',
+        items: [
+            {valType: 'number'},
+            {valType: 'number'}
+        ],
+        description: [
+            'Sets the range of the range slider.',
+            'If not set, defaults to the full xaxis range.',
+            'If the axis `type` is *log*, then you must take the',
+            'log of your desired range.',
+            'If the axis `type` is *date*, then you must convert',
+            'the date to unix time in milliseconds.'
+        ].join(' ')
+    },
     thickness: {
         valType: 'number',
         dflt: 0.15,

src/components/rangeslider/defaults.js

@@ -25,11 +25,23 @@ module.exports = function supplyLayoutDefaults(layoutIn, layoutOut, axName, coun
             attributes, attr, dflt);
     }
 
-    coerce('visible');
-    coerce('thickness');
     coerce('bgcolor');
     coerce('bordercolor');
     coerce('borderwidth');
+    coerce('thickness');
+    coerce('visible');
+    coerce('range');
+
+    // Expand slider range to the axis range
+    if(containerOut.range && !layoutOut[axName].autorange) {
+        var outRange = containerOut.range,
+            axRange = layoutOut[axName].range;
+
+        outRange[0] = Math.min(outRange[0], axRange[0]);
+        outRange[1] = Math.max(outRange[1], axRange[1]);
+    } else {
+        layoutOut[axName]._needsExpand = true;
+    }
 
     if(containerOut.visible) {
         counterAxes.forEach(function(ax) {