fluffychat/lib/views/widgets/default_app_bar_search_field.dart

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