Pankaj,
If you read through the SO answers, there is a pretty clear explanation why
the track by $index is not suited for what
you are trying to do. The last answer tells you exactly what and why it is
happening in your code.
At least you need to put an unique id in appliedgrids, and track on that id.
Also you use a sort of one-time bindings in your directive. Those will also
not get updated if you change anything.
meaning, this code:
$scope.gridIndex = $parse($attrs.gridIndex)($scope);
$scope.gridValues=$parse($attrs.appliedgrid)($scope);
$scope.gridParent=$parse($attrs.appliedgrids)($scope);
and this:
$scope.span = $parse($attrs.span)($scope);
$scope.columnIndex = $parse($attrs.columnIndex)($scope);
$scope.columnWidgets=$scope.gridValues[$scope.columnIndex].data;
runs only once, and those things will not update ever again!
Regards
Sander
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