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Thread: Need help implementing Infinite AJAX scroll

  1. #1
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    Default Unanswered: Need help implementing Infinite AJAX scroll

    Hello,

    I am using the live search grid example as given on - http://dev.sencha.com/deploy/ext-4.1...arch-grid.html

    How do I implement an Infinite AJAX scrollbar with page size of 10 (scrollbar similar to facebook scroll) on this grid.

    Any help would be appreciated.

    Thank you.

  2. #2
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    Did you already take a look at this? http://docs.sencha.com/ext-js/4-1/#!...th-filter.html

    Have you tried implementing anything so far, or are you just seeking guidance as to where to start? If the former, please post some code.

  3. #3
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    Here is the code that I am using.

    Code:
    Ext.Loader.setConfig({enabled: true});
    
    Ext.Loader.setPath('Ext.ux', 'ux');
    
    Ext.require([
        'Ext.grid.*',
        'Ext.data.*',
        'Ext.util.*',
        'Ext.tip.QuickTipManager',
        'Ext.ux.LiveSearchGridPanel'
    ]);
    
    Ext.onReady(function() {    
        Ext.QuickTips.init();
            
        // sample static data for the store
        var myData = [
            ['3m Co',                               71.72, 0.02,  0.03,  '9/1 12:00am'],
            ['Alcoa Inc',                           29.01, 0.42,  1.47,  '9/1 12:00am'],
            ['Altria Group Inc',                    83.81, 0.28,  0.34,  '9/1 12:00am'],
            ['American Express Company',            52.55, 0.01,  0.02,  '9/1 12:00am'],
            ['American International Group, Inc.',  64.13, 0.31,  0.49,  '9/1 12:00am'],
            ['AT&T Inc.',                           31.61, -0.48, -1.54, '9/1 12:00am'],
            ['Boeing Co.',                          75.43, 0.53,  0.71,  '9/1 12:00am'],
            ['Caterpillar Inc.',                    67.27, 0.92,  1.39,  '9/1 12:00am'],
            ['Citigroup, Inc.',                     49.37, 0.02,  0.04,  '9/1 12:00am'],
            ['E.I. du Pont de Nemours and Company', 40.48, 0.51,  1.28,  '9/1 12:00am'],
            ['Exxon Mobil Corp',                    68.1,  -0.43, -0.64, '9/1 12:00am'],
            ['General Electric Company',            34.14, -0.08, -0.23, '9/1 12:00am'],
            ['General Motors Corporation',          30.27, 1.09,  3.74,  '9/1 12:00am'],
            ['Hewlett-Packard Co.',                 36.53, -0.03, -0.08, '9/1 12:00am'],
            ['Honeywell Intl Inc',                  38.77, 0.05,  0.13,  '9/1 12:00am'],
            ['Intel Corporation',                   19.88, 0.31,  1.58,  '9/1 12:00am'],
            ['International Business Machines',     81.41, 0.44,  0.54,  '9/1 12:00am'],
            ['Johnson & Johnson',                   64.72, 0.06,  0.09,  '9/1 12:00am'],
            ['JP Morgan & Chase & Co',              45.73, 0.07,  0.15,  '9/1 12:00am'],
            ['McDonald\'s Corporation',             36.76, 0.86,  2.40,  '9/1 12:00am'],
            ['Merck & Co., Inc.',                   40.96, 0.41,  1.01,  '9/1 12:00am'],
            ['Microsoft Corporation',               25.84, 0.14,  0.54,  '9/1 12:00am'],
            ['Pfizer Inc',                          27.96, 0.4,   1.45,  '9/1 12:00am'],
            ['The Coca-Cola Company',               45.07, 0.26,  0.58,  '9/1 12:00am'],
            ['The Home Depot, Inc.',                34.64, 0.35,  1.02,  '9/1 12:00am'],
            ['The Procter & Gamble Company',        61.91, 0.01,  0.02,  '9/1 12:00am'],
            ['United Technologies Corporation',     63.26, 0.55,  0.88,  '9/1 12:00am'],
            ['Verizon Communications',              35.57, 0.39,  1.11,  '9/1 12:00am'],
            ['Wal-Mart Stores, Inc.',               45.45, 0.73,  1.63,  '9/1 12:00am']
        ];
    
        /**
         * Custom function used for column renderer
         * @param {Object} val
         */
        function change(val){
            if(val > 0){
                return '<span style="color:green;">' + val + '</span>';
            }else if(val < 0){
                return '<span style="color:red;">' + val + '</span>';
            }
            return val;
        }
    
        /**
         * Custom function used for column renderer
         * @param {Object} val
         */
        function pctChange(val){
            if(val > 0){
                return '<span style="color:green;">' + val + '%</span>';
            }else if(val < 0){
                return '<span style="color:red;">' + val + '%</span>';
            }
            return val;
        }        
        
        
        // create the data store
        var store = Ext.create('Ext.data.ArrayStore', {
            fields: [
               {name: 'company'},
               {name: 'price',      type: 'float'},
               {name: 'change',     type: 'float'},
               {name: 'pctChange',  type: 'float'},
               {name: 'lastChange', type: 'date', dateFormat: 'n/j h:ia'}
            ],
            data: myData
        });
        
        // create the Grid, see Ext.
        Ext.create('Ext.ux.LiveSearchGridPanel', {
            store: store,
            columnLines: true,
            columns: [
                {
                    text     : 'Company',
                    flex     : 1,
                    sortable : false, 
                    dataIndex: 'company'
                },
                {
                    text     : 'Price', 
                    width    : 75, 
                    sortable : true, 
                    renderer : 'usMoney', 
                    dataIndex: 'price'
                },
                {
                    text     : 'Change', 
                    width    : 75, 
                    sortable : true, 
                    dataIndex: 'change',
                    renderer: change
                },
                {
                    text     : '% Change', 
                    width    : 75, 
                    sortable : true, 
                    dataIndex: 'pctChange',
                    renderer: pctChange
                },
                {
                    text     : 'Last Updated', 
                    width    : 85, 
                    sortable : true, 
                    dataIndex: 'lastChange'
                }
            ],
            height: 350,
            width: 600,
            title: 'Live Search Grid',
            renderTo: 'grid-example',
            viewConfig: {
                stripeRows: true
            }
        });
    });
    I have already gone through the API.

    What I am trying to do is create a listener which fires on scroll event (for eg, after 80% scroll down on a page).

    Since I am new to Extjs, kindly guide me as to where and how I should be creating such an event.

    An example of the scroll concept can be found here : http://isotope.metafizzy.co/demos/infinite-scroll.html

    Thank you.

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