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
rowCount - 1).
DataTableSource objects are expected to be long-lived, not recreated with each build.
- 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
- rowCount → int
Called to obtain the number of rows to tell the user are available. [...]
- selectedRowCount → int
Called to obtain the number of rows that are currently selected. [...]
- hashCode → int
The hash code for this object. [...]
- hasListeners → bool
Whether any listeners are currently registered. [...]
@protected, read-only, inherited
- runtimeType → Type
A representation of the runtime type of the object.
int index) → DataRow
- Called to obtain the data about a particular row. [...]
VoidCallback listener) → void
Register a closure to be called when the object changes. [...]
) → 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 and removeListener will throw after the object is
Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
) → void
Call all the registered listeners. [...]
void listener) → void
Remove a previously registered closure from the list of closures that are
notified when the object changes. [...]
) → String
Returns a string representation of this object.