[Question] How to customize the mask of the chart?

[ultrakyo]

Hi, according to the ExtJs 4.0 API Doc,

we can show mask to select region on the chart to zoom that region as code below:

items:{ xtype:'chart', animate:true, store: store1, mask:'horizontal', listeners:{select:{ fn:function(me, selection){ me.setZoom(selection); me.mask.hide();}}},However, when I copy/paste the code above to my chart, the mask starts from the top of the window which isn't where the chart is belong to.

QUESTION:
> Is there anyway to keep the mask only in the chart area?

Thank you in advance.

[ultrakyo]

http://www.sencha.com/forum/showthre...malfunctioning