FdcFieldValueChangingContext<T> class

Mutable context supplied before a proposed field value is committed.

Use valueOf to inspect related fields and setValueOf to stage additional field changes that should accompany the primary value change.

Implementers

Constructors

FdcFieldValueChangingContext({BuildContext? buildContext, required FdcDataSet dataSet, required FdcFieldEventHost host, required String fieldName, FdcFieldDef? field, required int rowIndex, int? columnIndex, Object? row, Object? column, T? oldValue, T? newValue, Object? oldRawValue, Object? newRawValue, Object? valueOf(String fieldName)?}): Creates a FdcFieldValueChangingContext.

additionalValueSnapshot → Map<String, Object?>: Immutable snapshot of related field updates staged with setValueOf.
no setter
buildContext → BuildContext?: Flutter context of the editor or grid surface that emitted the event.
final
column → Object?: Host-specific column object when the event originated from a grid.
final
columnIndex → int?: Zero-based column index in the current grid layout.
final
dataSet → FdcDataSet: Dataset that owns the field and current edit state.
final
field → FdcFieldDef?: Resolved field metadata when available.
final
fieldName → String: Name of the dataset field involved in the event.
final
hashCode → int: The hash code for this object.
no setterinherited
host → FdcFieldEventHost: UI surface that emitted the event.
final
newRawValue → Object?: New unformatted source value.
final
newValue → T?: Proposed logical value before the change decision is applied.
final
oldRawValue → Object?: Previous unformatted source value.
final
oldValue → T?: Logical field value before the proposed or completed change.
final
row → Object?: Host-specific row object when the event originated from a grid.
final
rowIndex → int: Zero-based row index in the current view.
final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

accept() → FdcFieldValueChangeResult<T>: Accepts the proposed value without replacement.
cancel([String? message]) → FdcFieldValueChangeResult<T>: Cancels the current operation or edit state.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
replaceValue(T? value) → FdcFieldValueChangeResult<T>: Accepts the change and commits value instead of the proposed value.
setValueOf<V>(String fieldName, V? value) → void: Adds or replaces the pending value for fieldName.
toString() → String: A string representation of this object.
inherited
tryValueOf<V>(String fieldName) → V?: Returns the value of fieldName, or null when the field is unavailable.
valueOf<V>(String fieldName) → V?: Returns the typed value of fieldName, throwing if the field is unknown.