DataTableSource class abstract

A data source for obtaining row data for PaginatedDataTable objects.

A data table source provides two main pieces of information:

  • The number of rows in the data table (rowCount).
  • The data for each row (indexed from 0 to rowCount - 1).

It also provides a listener API (addListener/removeListener) so that consumers of the data can be notified when it changes. When the data changes, call notifyListeners to send the notifications.

DataTableSource objects are expected to be long-lived, not recreated with each build.

If a DataTableSource is used with a PaginatedDataTable that supports sortable columns (see DataColumn.onSort and PaginatedDataTable.sortColumnIndex), the rows reported by the data source must be reported in the sorted order.





hashCode int
The hash code for this object.
no setterinherited
hasListeners bool
Whether any listeners are currently registered.
no setterinherited
isRowCountApproximate bool
Called to establish if rowCount is a precise number or might be an over-estimate. If this returns true (i.e. the count is approximate), and then later the exact number becomes available, then call notifyListeners.
no setter
rowCount int
Called to obtain the number of rows to tell the user are available.
no setter
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
selectedRowCount int
Called to obtain the number of rows that are currently selected.
no setter


addListener(VoidCallback listener) → void
Register a closure to be called when the object changes.
dispose() → void
Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).
getRow(int index) DataRow?
Called to obtain the data about a particular row.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
notifyListeners() → void
Call all the registered listeners.
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes.
toString() String
A string representation of this object.


operator ==(Object other) bool
The equality operator.