Extjs checkcolumn disable for some rows, based on value

Question

I have a grid, with checkcolumn. It\'s dataIndex is, for example, \'checked\'.

I want to disable or hide checkboxes for some rows, where another value, \'can_be_chec

Answer 1

I was looking for a solution to this and came across this question, but no workable solution anywhere to show a disabled checkbox instead of NO checkbox as covered in the other answer. It was kind of involved but here's what I did (for 4.1.0):

1. I found that the extjs\examples\ux\css\CheckHeader.css file that is used by Ext.ux.CheckColumn does not have a disabled class, so I had to modify it to be more like the standard checkbox styling contained in ext-all.css (which does include a disabled checkbox class).

2. I had to extend Ext.ux.CheckColumn to prevent events being fired from disabled checkboxes.

3. Finally, I had to provide my own renderer to apply the disabled class according to my logic.

The code is as follows.

Modified CheckHeader.css:

.x-grid-cell-checkcolumn .x-grid-cell-inner {
    padding-top: 4px;
    padding-bottom: 2px;
    line-height: 14px;
}
.x-grid-with-row-lines .x-grid-cell-checkcolumn .x-grid-cell-inner {
    padding-top: 3px;
}

.x-grid-checkheader {
    width: 13px;
    height: 13px;
    background-image: url('../images/checkbox.gif');
    background-repeat: no-repeat;
    background-color: transparent;
    overflow: hidden;
    padding: 0;
    border: 0;
    display: block;
    margin: auto;
}

.x-grid-checkheader-checked {
    background-position: 0 -13px;
}

.x-grid-checkheader-disabled {
    background-position: -39px 0;
}

.x-grid-checkheader-checked-disabled {
    background-position: -39px -13px;
}

.x-grid-checkheader-editor .x-form-cb-wrap {
    text-align: center;
}

The background-image url above points to this image which normally ships with extjs 4.1.0 at: extjs\resources\themes\images\default\form\checkbox.gif.

The extended Ext.ux.CheckColumn class so that events will not get fired from disabled checkcolumns:

Ext.define('MyApp.ux.DisableCheckColumn', {
    extend: 'Ext.ux.CheckColumn',
    alias: 'widget.disablecheckcolumn',

    /**
     * Only process events for checkboxes that do not have a "disabled" class
     */
    processEvent: function(type, view, cell, recordIndex, cellIndex, e) {
        var enabled = Ext.query('[class*=disabled]', cell).length == 0,
            me = this;

        if (enabled) {
            me.callParent(arguments);
        }
    },

});

Implementation with custom renderer to apply disabled class according to my own logic:

column = {
    xtype: 'disablecheckcolumn',
    text: myText,
    dataIndex: myDataIndex,
    renderer: function(value, meta, record) {
        var cssPrefix = Ext.baseCSSPrefix,
            cls = [cssPrefix + 'grid-checkheader'],
            disabled = // logic to disable checkbox e.g.: !can_be_checked

        if (value && disabled) {
            cls.push(cssPrefix + 'grid-checkheader-checked-disabled');
        } else if (value) {
            cls.push(cssPrefix + 'grid-checkheader-checked');
        } else if (disabled) {
            cls.push(cssPrefix + 'grid-checkheader-disabled');
        }

        return '
 
';

    }
};