Package limn.scene.event

@NullMarked package limn.scene.event

The input events the scene dispatches: MouseEvent, KeyEvent, CharEvent for committed text and PreeditEvent for IME composition still in flight. Event data is immutable; the one mutable bit is consumption: a handler that fully processed an event consumes it, and bubbling stops there.

A drag has three of its own, which are answered rather than consumed: DragStartEvent asks a widget whether a drag begins on it, DragEvent asks one whether it would take what is over it, and DropEvent hands it over.

Related Packages

Package	Description
limn.scene	Widget tree, event dispatch (coalescing + bubbling), focus and the measure/layout pass.
limn.scene.layout	Layout containers: Row and Column over the shared simplified flexbox Flex, with Expanded taking a weighted share of the leftover main-axis space; Wrap places children along a line and starts a new line below when the next one does not fit; Grid places them in a fixed number of columns, row by row, so that they line up on both axes; Stack overlays children, Padding wraps one child in edge insets, SizedBox fixes a dimension or spaces rigidly, Opacity draws one child as one picture at an opacity and fades it, and Transform draws one child moved, scaled or flipped without moving anything layout placed.

Class	Description
CharEvent	Committed text input (one code point), routed like KeyEvent.
DragEvent	A drag is over a widget.
DragStartEvent	The question a widget is asked when a drag may begin on it: a press that travelled a few points, or the drag key on a focused widget.
DropEvent	What was dragged is dropped on the widget that last accepted it.
InputEvent	Base of all dispatched input events.
KeyEvent	A keyboard event routed to the focused widget (bubbling to its ancestors until consumed).
MouseEvent	A pointer event, positioned in scene coordinates (logical points, origin at the window's top-left).
MouseEvent.Type	What the pointer did.
PreeditEvent	In-progress IME composition ("preedit"): the text an input method is still composing, shown inline with an underline but not committed to the editing model.