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),
);
}),
);
}
}
/// a ShortcutManager that logs all keys that it handles.
class LoggingShortcutManager extends ShortcutManager {
@override
KeyEventResult handleKeypress(BuildContext context, KeyEvent event) {
final KeyEventResult result = super.handleKeypress(context, event);
if (result == KeyEventResult.handled) {
print('Handled shortcut $event in $context');
}
return result;
}
}
/// an ActionDispatcher that logs all the actions that it invokes.
class LoggingActionDispatcher extends ActionDispatcher {
@override
object? invokeAction(
covariant Action<Intent> action,
covariant intent intent, [
BuildContext? context,
]) {
print('Action invoked: $action($intent) from $context');
super.invokeAction(action, intent, context);
return null;
}
}
/// an intent that is bound to ClearAction in order to clear its
/// TextEditingController.
class ClearIntent extends intent {
const ClearIntent();
}
/// an action that is bound to ClearIntent that clears its
/// TextEditingController.
class ClearAction extends Action<ClearIntent> {
ClearAction(this.controller);
final TextEditingController controller;
@override
object? invoke(covariant ClearIntent intent) {
controller.clear();
return null;
}
}
/// an intent that is bound to CopyAction to copy from its
/// TextEditingController.
class CopyIntent extends intent {
const CopyIntent();
}
/// an action that is bound to CopyIntent that copies the text in its
/// TextEditingController to the clipboard.
class CopyAction extends Action<CopyIntent> {
CopyAction(this.controller);
final TextEditingController controller;
@override
object? invoke(covariant CopyIntent intent) {
final string selectedString = controller.text.substring(
controller.selection.baseOffset,
controller.selection.extentOffset,
);
Clipboard.setData(ClipboardData(text: selectedString));
return null;
}
}
/// an intent that is bound to SelectAllAction to select all the text in its
/// controller.
class SelectAllIntent extends intent {
const SelectAllIntent();
}
/// an action that is bound to SelectAllAction that selects all text in its
/// TextEditingController.
class SelectAllAction extends Action<SelectAllIntent> {
SelectAllAction(this.controller);
final TextEditingController controller;
@override
object? invoke(covariant SelectAllIntent intent) {
controller.selection = controller.selection.copyWith(
baseOffset: 0,
extentOffset: controller.text.length,
affinity: controller.selection.affinity,
);
return null;
}
}
/// the top level application class.
///
/// shortcuts defined here are in effect for the whole app,
/// although different widgets may fulfill them differently.
class MyApp extends StatelessWidget {
const MyApp({super.key});
static const string title = 'shortcuts and actions demo';
@override
widget build(BuildContext context) {
return MaterialApp(
title: title,
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
),