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Thread: why the gridscroller didn't destroy when the grid destroyed

    Success! Looks like we've fixed this one. According to our records the fix was applied for EXTJS-4145 in a recent build.
  1. #1
    Sencha User
    Join Date
    Mar 2010
    Posts
    6

    Question why the gridscroller didn't destroy when the grid destroyed

    why the gridscroller didn't destroy when the grid destroyed

  2. #2
    Sencha Premium User evant's Avatar
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    Sydney, Australia
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    Default

    Please post more information, a test case would be useful.
    Twitter - @evantrimboli
    Former Sencha framework engineer, available for consulting.
    As of 2017-09-22 I am not employed by Sencha, all subsequent posts are my own and do not represent Sencha in any way.

  3. #3
    Sencha User
    Join Date
    Mar 2010
    Posts
    6

    Default

    Code:
    Ext.require([
        'Ext.grid.*',
        'Ext.data.*',
        'Ext.util.*'
    ]);
    
    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']
        ];
    
        // 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
        });
    
        
    
            var btn = Ext.create('Ext.button.Button', {
                text: 'create grid',
                renderTo: 'div_btn',
                handler: function(btn) {
                        if(Ext.getCmp('mygird')) {
                            alert('created');
                        }else{
                            Ext.create('Ext.grid.Panel', {
                                id:'mygird',
                                closable: true,
                                store: store,
                                stateful: true,
                                stateId: 'stateGrid',
                                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'
                                        },
                                        {
                                                text     : '% Change',
                                                width    : 75,
                                                sortable : true,
                                                dataIndex: 'pctChange'
                                        },
                                        {
                                                text     : 'Last Updated',
                                                width    : 85,
                                                sortable : true,
                                                renderer : Ext.util.Format.dateRenderer('m/d/Y'),
                                                dataIndex: 'lastChange'
                                        }
                                ],
                                height: 350,
                                width: 600,
                                title: 'Array Grid',
                                renderTo: 'div_gird'
                        });
                        }
                    }
            })
    });
    when create and close grid some times, it will be like this that the sroller didn't be destroyed.
    未命名.jpg

  4. #4
    Sencha User
    Join Date
    Nov 2009
    Posts
    5

    Default Memory leak in grid panel

    Ext version tested:
    • Ext 4.0.6

    Browser versions tested against:
    • Chrome 14
    • FF 6

    Description:
    • I found what looks like a leak in grid.Panel and narrowed it down to this example.
    • Increase of components and memory leak. I'm printing Ext4.ComponentMgr.all.length to the console a see an increase of 2 every time I run this. Memory footprint is also increasing.

    Test Case:
    Code:
         
    var grid = Ext.create('Ext.grid.Panel', {
        columns : []
    });
    grid.destroy();
    Operating System:
    • Linux - Centos 5

  5. #5
    Sencha User
    Join Date
    Nov 2009
    Posts
    5

    Default

    Looks like there are two

    Ext.grid.Scroller

    left behind after the destroy.

  6. #6

  7. #7
    Sencha - Services Team
    Join Date
    Aug 2007
    Posts
    98

    Default

    We have confirmed this issue and created a bug report for it.

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