I found a workaround, but it's not a "clean" solution, and i can't still made a selection on the textfield, but it works (or it could be said to work). What i've done is:
First, I've overriden the function isActivatable (the one wich threw the error because this.inputItem.getValue() was undefined):
Code:
<script type = "text/javascript">
Ext.override(Ext.ux.grid.filter.StringFilter,{
isActivatable : function () {
return true; //this.inputItem.startValue.length > 0;
}
});
</script>
and inside the createColModel function, i have initialized the filter as active:
Code:
filter:{type: 'string',active:true}
If anyoune could have a better solution, I'd really appreciate that.
Regards