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    Default Answered: Pass function to a store config option

    Answered: Pass function to a store config option


    I'm returning a store in a function in this view file. I want to pass that store to the chart I'm defining as its store. Is this possible? Is there a workaround in MVC?

    Here is my attempt:

    Code:
    Ext.define('C.view.chart.Chart' , {
            extend: 'Ext.chart.Chart',
            alias: 'widget.chartchart',
            width: 500,
            height: 600,
            animate: true,
            store: this.createStore(),
            shadow: true,
            legend: {
                position: 'right'
            },
            insetPadding: 25,
            series: [{
                    type: 'pie',
                    field: 'number',
                    showInLegend: true,
                    tips: {
                            trackMouse: true,
                            width: 140,
                            height: 28,
                            renderer: function(storeItem, item) {
                                    //calculate percentage.
                                    var total = 0;
                                    chart.each(function(rec) {
                                            total += rec.get('number');
                                    });
                                    this.setTitle(storeItem.get('level') + ': ' + Math.round(stor$
                            }
                    },
                    highlight: {
                            segment: {
                                    margin: 20
                            }
                    },
                    label: {
                            field: 'level',
                            display: 'rotate',
                            contrast: true,
                            font: '18px Arial'
                    }
            }],
            createStore:function(){
                    var store = Ext.data.StoreManager.lookup('Chart');
                    store.group('grade');
                    var groups = store.getGroups();
                    // create new store basing on groups array
                    var groupStore = Ext.create('Ext.data.Store', {
                            fields: [{
                                    name:'grade', mapping: 'name'
                            }, {
                                    name: 'total', convert: function(value, record){
                                            return record.raw.children.length;
                                    }
                            }],
                            data: groups
                    });
            return groupStore;
            }
    });
    I have a store "Chart.js" with fields name and grade. My new store has the fields name (of the grade) and total (total students in that grade)

  2. Try this:
    Code:
    Ext.define('C.view.chart.Chart' , {
        extend: 'Ext.chart.Chart',
        alias: 'widget.chartchart',
        width: 500,
        height: 600,
        animate: true,
        // store: this.createStore(), <- this will cause "Object [object Window] has no method 'createStore'" error
         initComponent: function(){
            this.store = this.createStore();
            this.callParent(arguments);
        },
        shadow: true,
        legend: {
            position: 'right'
        },
        insetPadding: 25,
        series: [{
            type: 'pie',
            field: 'number',
            showInLegend: true,
            tips: {
                trackMouse: true,
                width: 140,
                height: 28,
                renderer: function(storeItem, item) {
                    //calculate percentage.
                    var total = 0;
                    chart.each(function(rec) {
                        total += rec.get('number');
                    });
                    this.setTitle(storeItem.get('level') + ': ' + Math.round(stor$
                }
            },
            highlight: {
                segment: {
                    margin: 20
                }
            },
            label: {
                field: 'level',
                display: 'rotate',
                contrast: true,
                font: '18px Arial'
            }
        }],
        createStore:function(){
            var store = Ext.data.StoreManager.lookup('Chart');
            store.group('grade');
            var groups = store.getGroups();
            // create new store basing on groups array
            var groupStore = Ext.create('Ext.data.Store', {
                fields: [{
                    name:'grade', mapping: 'name'
                }, {
                    name: 'total', convert: function(value, record){
                        return record.raw.children.length;
                    }
                }],
                data: groups
            });
            return groupStore;
        }
    });
    However, I suggest you move the code of createStore() to controller or store and then pass created store to your view creating.

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