Class clove::Datasource

class clove::Datasource

Base class for datasources.

Read the Manual for details.

Subclassed by clove::AsyncDatasource, clove::NativeDatasource, clove::ProxyDatasource

Public Functions

getValue(ptr)

Returns the value for a given node.

Parameters

• ptr: The clove::DatasourceValuePointer.

getMetadata(ptr)

Returns an object of metadata information (like icons, status infos used for styling, …). Optional.

Parameters

• ptr: The clove::DatasourceValuePointer.

changeValue(ptr, value)

Change the value for a given node.

This method is called from external places, e.g. when a user makes changes in a datasource-connected widget.

Parameters

• ptr: The clove::DatasourceValuePointer.

• value: The new value.

rowCount(parent)

Returns the number of rows for a given node.

Parameters

• parent: The parent as clove::DatasourceValuePointer.

columnCount(parent)

Returns the number of columns for a given node.

Parameters

• parent: The parent as clove::DatasourceValuePointer.

valuePointer(irow, icol, parent)

Constructs and returns a clove::DatasourceValuePointer for a given node.

Parameters

• irow: The row index.

• icol: The column index.

• parent: The parent as clove::DatasourceValuePointer.

parent(ptr)

Returns the parent node for a given node.

Parameters

• ptr: A node as clove::DatasourceValuePointer.

valuePointerNavigateInDepth(ptr, direction, mayexpandfct)

Returns a clove::DatasourceValuePointer resulting in the original one by navigation in depth.

Parameters

• ptr: A node as clove::DatasourceValuePointer.

• direction: The direction (+1 or -1).

• mayexpandfct: A function(ptr) which returns true iff this node’s children are to be traversed.

OnDataInsert

Triggered when a node insertion takes place.

This is a clove.Event instance. See Manual for details.

OnDataRemove

Triggered when a node removal takes place.

This is a clove.Event instance. See Manual for details.

OnDataUpdate

Triggered when a node data update takes place.

This is a clove.Event instance. See Manual for details.