How to show label with line and display label outside in piechart in extjs4.1

问题

can anybody tell How to show label with line and display label outside in extjs4.1.I want to display label outside of pie and show line to map the label

eg 

     /   \      \   
    test  test1  test2

回答1:

You've got the display option of the label config, that you can set to 'outside'.

As for the lines, you'll have to draw them yourself... Which would be a quite involved hack IMO. If you're interested in trying, that takes place in Ext.chart.Label#renderLabels(), and uses Ext.chart.series.Pie's onCreateLabel() and onPlaceLabel() methods. Don't forget to take your trigonometry with you before diving in there!

来源：https://stackoverflow.com/questions/16891460/how-to-show-label-with-line-and-display-label-outside-in-piechart-in-extjs4-1