Extjs chart shadow

I have the following code to contruct a pie chart.

The problem is i don't get a shadow.

Note : If the chart config, theme='Base', then the pie has a shadow

Ext.define('ChartPanel', {
    extend: 'Ext.panel.Panel',
    //------------------CONSTRUCTOR  
    , constructor: function(externalConfigs) {
        externalConfigs = externalConfigs || {}; 

        var configs = {
            title: 'My panel',
            items: [
            {
                xtype: 'chart',
                store: myStore,
                width: '30%',
                series: [{
                    type: 'pie'
                        , field: 'persentage'
                        , shadow: 'sides'
                        , showInLegend: false
                        , donut: false
                        , renderer: function(sprite, record, attributes, index, store) {
                            if (record.data.description == 'option1') {
                                sprite.setAttributes({
                                    fill: 'url(#redGradient)',
                                    stroke: '#ffffff'
                                }, false);
                            } else if (record.data.description == 'option2') {
                                sprite.setAttributes({
   开发者_如何学JAVA                                 fill: 'url(#greenGradient)',
                                    stroke: '#ffffff'
                                }, false);
                            }
                        }
                   }]
                   , gradients: [{
                        id: 'redGradient',
                        angle: 45,
                        stops: {
                            0: { color: '#820000' },
                            100: { color: '#BD1E00' }
                        }                        
                    }, {
                        id: 'greenGradient',
                        angle: 0,
                        stops: {
                            0: { color: '#89AC10' },
                            100: { color: '#A1C22D' }
                        }
                    }]
                } 
            ]
            }

            Ext.apply(configs, externalConfigs);
            this.callParent([configs]); //Call the parent constructor
        }


    });    

Any ideas how to get a shadow? Thanks

---

Use shadow: true (see the docs in the previous link to see other possible options) within your chart definition. (Not within the pie definition). There is no shadow config property for Ext.chart.series.Pie. You would need to use shadowAttributes within Ext.chart.series.Pie.

---

I found that

return attributes;

inside the renderer is essential.