scrollOnPageUpKeyPress function
ExecutionInstruction
scrollOnPageUpKeyPress({
- required SuperEditorContext editContext,
- required KeyEvent keyEvent,
Scrolls up by the viewport height, or as high as possible, when the user presses the Page Up key.
Implementation
ExecutionInstruction scrollOnPageUpKeyPress({
required SuperEditorContext editContext,
required KeyEvent keyEvent,
}) {
if (keyEvent is! KeyDownEvent && keyEvent is! KeyRepeatEvent) {
return ExecutionInstruction.continueExecution;
}
if (keyEvent.logicalKey.keyId != LogicalKeyboardKey.pageUp.keyId) {
return ExecutionInstruction.continueExecution;
}
final scroller = editContext.scroller;
scroller.animateTo(
max(scroller.scrollOffset - scroller.viewportDimension, scroller.minScrollExtent),
duration: const Duration(milliseconds: 150),
curve: Curves.decelerate,
);
return ExecutionInstruction.haltExecution;
}