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+ + + + + +

Defines a mask for a chart's series. +The 'chart' member must be set prior to rendering.

+ +

A Mask can be used to select a certain region in a chart. +When enabled, the select event will be triggered when a +region is selected by the mask, allowing the user to perform +other tasks like zooming on that region, etc.

+ +

In order to use the mask one has to set the Chart mask option to +true, vertical or horizontal. Then a possible configuration for the +listener could be:

+ +
    items: {
+        xtype: 'chart',
+        animate: true,
+        store: store1,
+        mask: 'horizontal',
+        listeners: {
+            select: {
+                fn: function(me, selection) {
+                    me.setZoom(selection);
+                    me.mask.hide();
+                }
+            }
+        },
+
+ +

In this example we zoom the chart to that particular region. You can also get +a handle to a mask instance from the chart object. The chart.mask element is a +Ext.Panel.

+
Defined By

Methods

 

 

+

Returns

  • void    +
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