fluffychat/lib/widgets/default_app_bar_search_field.dart
2022-01-28 18:21:20 +01:00

129 lines
3.9 KiB
Dart

//@dart=2.12
import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/l10n.dart';
import '../config/app_config.dart';
class DefaultAppBarSearchField extends StatefulWidget {
final TextEditingController? searchController;
final void Function(String)? onChanged;
final void Function(String)? onSubmit;
final Widget? suffix;
final bool autofocus;
final String? prefixText;
final String? hintText;
final String? labelText;
final EdgeInsets? padding;
final bool readOnly;
final Widget? prefixIcon;
final bool unfocusOnClear;
final bool autocorrect;
const DefaultAppBarSearchField({
Key? key,
this.searchController,
this.onChanged,
this.onSubmit,
this.suffix,
this.autofocus = false,
this.prefixText,
this.hintText,
this.padding,
this.labelText,
this.readOnly = false,
this.prefixIcon,
this.unfocusOnClear = true,
this.autocorrect = true,
}) : super(key: key);
@override
DefaultAppBarSearchFieldState createState() =>
DefaultAppBarSearchFieldState();
}
class DefaultAppBarSearchFieldState extends State<DefaultAppBarSearchField> {
late final TextEditingController _searchController;
bool _lastTextWasEmpty = false;
final FocusNode _focusNode = FocusNode();
void requestFocus() => _focusNode.requestFocus();
void _updateSearchController() {
final thisTextIsEmpty = _searchController.text.isEmpty;
if (_lastTextWasEmpty != thisTextIsEmpty) {
setState(() => _lastTextWasEmpty = thisTextIsEmpty);
}
}
@override
void initState() {
super.initState();
_searchController = widget.searchController ?? TextEditingController();
// we need to remove the listener in the dispose method, so we need a reference to the callback
_searchController.addListener(_updateSearchController);
_focusNode.addListener(() => setState(() {}));
}
@override
void dispose() {
_focusNode.dispose();
_searchController.removeListener(_updateSearchController);
if (widget.searchController == null) {
// we need to dispose our own created searchController
_searchController.dispose();
}
super.dispose();
}
@override
Widget build(BuildContext context) {
return Container(
height: 40,
padding: widget.padding ?? const EdgeInsets.only(right: 12),
child: TextField(
autofocus: widget.autofocus,
autocorrect: widget.autocorrect,
enableSuggestions: widget.autocorrect,
keyboardType: widget.autocorrect ? null : TextInputType.visiblePassword,
controller: _searchController,
onChanged: widget.onChanged,
focusNode: _focusNode,
readOnly: widget.readOnly,
onSubmitted: widget.onSubmit,
decoration: InputDecoration(
prefixText: widget.prefixText,
labelText: widget.labelText,
enabledBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(AppConfig.borderRadius),
borderSide:
BorderSide(color: Theme.of(context).secondaryHeaderColor),
),
contentPadding: const EdgeInsets.only(
top: 8,
bottom: 8,
left: 16,
),
hintText: widget.hintText,
prefixIcon: widget.prefixIcon,
suffixIcon: !widget.readOnly &&
(_focusNode.hasFocus ||
(widget.suffix == null &&
(_searchController.text.isNotEmpty)))
? IconButton(
tooltip: L10n.of(context)!.clearText,
icon: const Icon(Icons.backspace_outlined),
onPressed: () {
_searchController.clear();
widget.onChanged?.call('');
if (widget.unfocusOnClear) _focusNode.unfocus();
},
)
: widget.suffix,
),
),
);
}
}