KeyMessage class Null safety
The assumbled information corresponding to a native key message.
While Flutter's KeyEvents are created from key messages from the native platform, every native message might result in multiple KeyEvents. For example, this might happen in order to synthesize missed modifier key presses or releases.
A KeyMessage bundles all information related to a native key message together for the convenience of propagation on the FocusNode tree.
When dispatched to handlers or listeners, or propagated through the FocusNode tree, all handlers or listeners belonging to a node are executed regardless of their KeyEventResult, and all results are combined into the result of the node using combineKeyEventResults. Empty events or rawEvent should be considered as a result of KeyEventResult.ignored.
In very rare cases, a native key message might not result in a KeyMessage. For example, key messages for Fn key are ignored on macOS for the convenience of cross-platform code.
- Annotations
Constructors
-
KeyMessage(List<
KeyEvent> events, RawKeyEvent? rawEvent) -
Create a KeyMessage by providing all information.
const
Properties
-
events
→ List<
KeyEvent> -
The list of
KeyEvents converted from the native key message.final - hashCode → int
-
The hash code for this object.
read-only, inherited
- rawEvent → RawKeyEvent?
-
The native key message in the form of a raw key event.
final
- 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.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited