getClass for actionColumn only in a few rows - extjs

Question

I'm using the code below, to set the css class for an action column.
But even if the result is null, some elements are inserted by extjs.
getClass: function(v, meta, data) {
if (data.myDate < new Date())
return null;
else
return 'insert';
}
Generated html for return null:
<img alt="" src="data:image/gif;base64,R0lGODlhAQABAID/AMDAwAAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw=="
class="x-action-col-icon x-action-col-1 null">
The major problem is that cursor is changed to a hand pointer when moving this "blank" space.
There is a way to not generate elements when no icon is to be shown?

Answer 1

I don't see any way to do it without extending action column. IMO easiest way is to provide custom renderer function. Example:
Ext.define('Ext.grid.column.MyAction', {
extend: 'Ext.grid.column.Action',
constructor: function(config) {
var me = this,
cfg = Ext.apply({}, config),
items = cfg.items || [me],
l = items.length,
i,
item,
cls;
me.callParent(arguments);
me.renderer = function(v, meta) {
v = Ext.isFunction(cfg.renderer) ? cfg.renderer.apply(this, arguments)||'' : '';
meta.tdCls += ' ' + Ext.baseCSSPrefix + 'action-col-cell';
for (i = 0; i < l; i++) {
item = items[i];
item.disable = Ext.Function.bind(me.disableAction, me, [i]);
item.enable = Ext.Function.bind(me.enableAction, me, [i]);
cls = (Ext.isFunction(item.getClass) ? item.getClass.apply(item.scope||me.scope||me, arguments) : (me.iconCls || ''));
if (cls !== null) {
v += '<img alt="' + (item.altText || me.altText) + '" src="' + (item.icon || Ext.BLANK_IMAGE_URL) +
'" class="' + Ext.baseCSSPrefix + 'action-col-icon ' + Ext.baseCSSPrefix + 'action-col-' + String(i) + ' ' + (item.disabled ? Ext.baseCSSPrefix + 'item-disabled' : ' ') + (item.iconCls || '') +
' ' + cls + '"' +
((item.tooltip) ? ' data-qtip="' + item.tooltip + '"' : '') + ' />';
}
}
return v;
};
}
});