EventArgs class Null safety

An abstract representation of the (optional) arguments provided to handlers when an Event occurs.

This is intended to be extended with your own custom class, if you want to provide subscribers with some data relating to the Event. Alternatively, use one of the supplied EventArgs derived classes: StdEventArgs, Value or Values.

// example
class ValueEventArgs extends EventArgs {
  int changedValue;
  ValueEventArgs(this.changedValue);
}
Implementers

Constructors

EventArgs()

Properties

hashCode int
The hash code for this object. [...]
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
toString() String
A string representation of this object. [...]
inherited

Operators

operator ==(Object other) bool
The equality operator. [...]
inherited