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Thread: Dynamic Tree grid in Extjs 4.1

  1. #1
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    Default Dynamic Tree grid in Extjs 4.1

    Hi All,

    Kindly requesting for help to make the dynamic grid add and remove execution faster. I'm having a tree grid, which has 4 static columns and after that, some dynamic columns based on the hasMany relationship data in the store.

    I can able to get the grid work, but it is taking more than 3 mins to render the data. Here is my code below, and request your help to make the code execute faster(very urgent). And the data will be available only in the leaf node.

    // removing the column if there is any dynamic column added
    function removeColumnsIfExists(){
    var headerCols=grid.getView().getGridColumns();
    for(var i=4; i<headerCols.length; i++){
    grid.headerCt.remove(i);
    }
    grid.getView().refresh();
    }

    // creating dynamically new column to display the date field

    function createFlatStore_1(node){
    removeColumnsIfExists();
    if(node){
    if(node.hasChildNodes()){
    var children=node.childNodes;
    for(var i=0;i<children.length;i++){

    if(children[i].isLeaf()){

    var columns = children[i].myDates();

    for(var j=0;j<columns.count();j++){
    column = Ext.create('Ext.grid.column.Date', {
    dataIndex:'dataIndex'+j,
    text: columns.getAt(j).get('title'),
    format:'d/m/Y',
    align: 'center',
    editor: {
    xtype: 'monthfield',
    allowBlank: false,
    format : 'd-M-Y'
    },
    renderer : function (value, metaData, record, row, col, store, gridView){
    var pgms=record.myDates();
    var dateValue;
    if(pgms.count() > (col-4)) {
    if(value !== undefined){
    pgms.getAt(col-4).set('date', value);
    pgms.getAt(col-4).setDirty();
    }
    dateValue = Ext.Date.dateFormat(pgms.getAt(col-4).get('date'),'d-M-Y');

    }
    return dateValue;
    }
    });

    grid.headerCt.insert(grid.columns.length, column);
    grid.getView().refresh();
    }

    break;
    }

    createFlatStore_1(children[i]);
    }

    }
    }
    }

  2. #2
    Sencha - Sr Software Engineer mitchellsimoens's Avatar
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    For dynamic why don't you let it load the child nodes when you expand a node?
    Mitchell Simoens @LikelyMitch
    Sencha Inc, Senior Software Engineer
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    Check out my GitHub, lots of nice things for Ext JS and Sencha Touch
    https://github.com/mitchellsimoens

  3. #3
    Sencha User
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    Thanks mitchellsimoens, for your response

    By default all my nodes are expanded. And also for parent nodes the associated data length is zero. Only the leaf node will have the data.

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