Ext chart custom event

[xun]

I wonder how to fire some custom events in chart and make it available to its parent component.

The following is slightly modified from the example given by ext.

Basically i just want to fire a custom event in the data series' highlightItem method ... and want to catch and handle it later, as in


var chart = Ext.create('myChart', {
store: store1
});
chart.on('chartHover', function () { console.log('chart hover')}, this);
.
...

It did not work. Why?

The following is the full dummy code.

Thanks
Ext.define('myChart', {
extend: 'Ext.chart.Chart',
id: 'myChart',
style: 'background:#fff',
animate: true,
//store: store1,
shadow: true,
theme: 'Category1',
legend: {
position: 'right'
},
axes: [{
type: 'Numeric',
minimum: 0,
position: 'left',
fields: ['data1', 'data2', 'data3'],
title: 'Number of Hits',
minorTickSteps: 1,
grid: {
odd: {
opacity: 1,
fill: '#ddd',
stroke: '#bbb',
'stroke-width': 0.5
}
}
}, {
type: 'Category',
position: 'bottom',
fields: ['name'],
title: 'Month of the Year'
}],
series: [{
type: 'line',
highlight: {
size: 7,
radius: 7
},


axis: 'left',
xField: 'name',
yField: 'data1',
markerConfig: {
type: 'cross',
size: 4,
radius: 4,
'stroke-width': 0
},
highlightItem: function (item) {
// console.log(this);
this.fireEvent("chartHover");
//nm
}
}, {
type: 'line',
highlight: {
size: 7,
radius: 7
},
axis: 'left',
smooth: true,
xField: 'name',
yField: 'data2',
markerConfig: {
type: 'circle',
size: 4,
radius: 4,
'stroke-width': 0
},
highlightItem: function (item) {
// console.log(this);
this.fireEvent("chartHover");
}


}, {
type: 'line',
highlight: {
size: 7,
radius: 7
},
axis: 'left',
smooth: true,
fill: true,
xField: 'name',
yField: 'data3',
markerConfig: {
type: 'circle',
size: 4,
radius: 4,
'stroke-width': 0
},
highlightItem: function (item) {
// console.log(this);
this.fireEvent("chartHover");
//nm
}


}],


initComponent: function () {
this.callParent();
this.addEvents("chartHover");


}
});






Ext.onReady(function () {
var generateData = function (n, floor) {
var data = [],
p = (Math.random() * 11) + 1,
i;


floor = (!floor && floor !== 0) ? 20 : floor;


for (i = 0; i < (n || 12); i++) {
data.push({
name: Ext.Date.monthNames[i % 12],
data1: Math.floor(Math.max((Math.random() * 100), floor)),
data2: Math.floor(Math.max((Math.random() * 100), floor)),
data3: Math.floor(Math.max((Math.random() * 100), floor)),
data4: Math.floor(Math.max((Math.random() * 100), floor)),
data5: Math.floor(Math.max((Math.random() * 100), floor)),
data6: Math.floor(Math.max((Math.random() * 100), floor)),
data7: Math.floor(Math.max((Math.random() * 100), floor)),
data8: Math.floor(Math.max((Math.random() * 100), floor)),
data9: Math.floor(Math.max((Math.random() * 100), floor))
});
}


return data;
};




var store1 = Ext.create('Ext.data.JsonStore', {
fields: ['name', 'data1', 'data2', 'data3', 'data4', 'data5', 'data6', 'data7', 'data9', 'data9'],
data: generateData()
});


store1.loadData(generateData(8));


var chart = Ext.create('myChart', {
store: store1
});
chart.on('chartHover', function () { console.log('chart hover')}, this);
var win = Ext.create('Ext.Window', {
width: 800,
height: 600,
minHeight: 400,
minWidth: 550,
hidden: false,
maximizable: true,
title: 'Line Chart',
renderTo: Ext.getBody(),
layout: 'fit',
tbar: [{
text: 'Save Chart',
handler: function () {
Ext.MessageBox.confirm('Confirm Download', 'Would you like to download the chart as an image?', function (choice) {
if (choice == 'yes') {
chart.save({
type: 'image/png'
});
}
});
}
}, {
text: 'Reload Data',
handler: function () {
store1.loadData(generateData(8));
}
}],
items: chart
});








});

[xun]

Does someone has an answer? Why the fireEvent, addEvent model would not work here? thanks