Question

I am using ExtJs 3.4. I have a checkbox control in an ExtJs Grid. I want to disable the checkbox control based on when a value in the store is equal to zero.

I have tried this and it does not disable it:

var colModel = new Ext.grid.ColumnModel(
    {
        columns: [
            { id: 'AircraftOid', header: "AircraftOid", width: 100, sortable: true, locked: true, dataIndex: 'AircraftOid', hidden: true },
            { id: 'nNumber', header: "N-#", width: 100, sortable: true, locked: true, dataIndex: 'NNumber' },
            { header: "Make", width: 150, sortable: true, dataIndex: 'Make' },
            { header: "Model", width: 150, sortable: true, dataIndex: 'Model' },
            { header: "Register",
                width: 55,
                sortable: true,
                dataIndex: 'Register',
                xtype: 'checkcolumn'
            }
        ],
        isCellEditable: function (col, row) {
            return false;
        }
    });

var grid = new Ext.grid.GridPanel({
        store: aircraftStore,
        cm: colModel,
        sm: new Ext.grid.RowSelectionModel({ singleSelect: true }),
        viewConfig: {
            forceFit: true
        },
        height: 100,
        split: true,
        region: 'north'
    });

Thanks in advance.

Answer 1

Your thought was right. But…

First, you’re overriding column model’s isCellEditable method to prevent editing. But Grid doesn’t calls that method. It only works on EditorGrid.

Second, Ext.ux.grid.CheckColumn doesn’t handle any editable features, because it’s not an editor, it’s just a column.

So for my project i modified it to act as a editor and added the readOnly property to prevent editing on normal Grids. If you set readOnly to true, it’ll not be clickable anymore.

Ext.ux.grid.CheckColumn = Ext.extend(Ext.grid.Column, {
    processEvent : function(name, e, grid, rowIndex, colIndex) {
        if ( !this.readOnly && name == 'mousedown' ) {
            grid.stopEditing();
            var record = grid.store.getAt(rowIndex);
            var cm = grid.getColumnModel();
            var edit_e = {
                grid: grid,
                record: record,
                field: this.dataIndex,
                value: record.data[this.dataIndex],
                row: rowIndex,
                column: colIndex,
                cancel: false
            };
            if ( grid.fireEvent( 'beforeedit', edit_e ) !== false && !edit_e.cancel ) {
                record.set( this.dataIndex, !record.data[this.dataIndex] );
                edit_e.cancel = null;
                grid.fireEvent( 'afteredit', edit_e );
            }
            return false;
        } else {
            return Ext.grid.ActionColumn.superclass.processEvent.apply(this, arguments);
        }
    },

    editable : false,

    readOnly : false,

    renderer : function(v, p, record){
        p.css += ' x-grid3-check-col-td'; 
        return String.format('<div class="x-grid3-check-col{0}">&#160;</div>', v ? '-on' : '');
    },

    init: Ext.emptyFn
});

Ext.preg('checkcolumn', Ext.ux.grid.CheckColumn);

Ext.grid.CheckColumn = Ext.ux.grid.CheckColumn;

Ext.grid.Column.types.checkcolumn = Ext.ux.grid.CheckColumn;