Files
GitJournal/lib/folder_views/list_view.dart
2020-10-23 01:38:47 +02:00

186 lines
5.0 KiB
Dart

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:gitjournal/core/note.dart';
import 'package:gitjournal/core/notes_folder.dart';
import 'package:gitjournal/repository.dart';
import 'package:gitjournal/settings.dart';
import 'package:gitjournal/utils.dart';
import 'package:gitjournal/widgets/icon_dismissable.dart';
typedef Widget NoteTileBuilder(BuildContext context, Note note);
class FolderListView extends StatefulWidget {
final NoteTileBuilder noteTileBuilder;
final NoteBoolPropertyFunction isNoteSelected;
final NotesFolder folder;
final String emptyText;
final String searchTerm;
FolderListView({
@required this.folder,
@required this.noteTileBuilder,
@required this.emptyText,
@required this.isNoteSelected,
@required this.searchTerm,
});
@override
_FolderListViewState createState() => _FolderListViewState();
}
class _FolderListViewState extends State<FolderListView> {
var _listKey = GlobalKey<AnimatedListState>();
var deletedViaDismissed = <String>[];
@override
void initState() {
super.initState();
_addListeners(widget.folder, this);
}
@override
void dispose() {
_removeListeners(widget.folder, this);
super.dispose();
}
static void _addListeners(NotesFolder folder, _FolderListViewState st) {
folder.addNoteAddedListener(st._noteAdded);
folder.addNoteRemovedListener(st._noteRemoved);
folder.addListener(st._folderChanged);
}
static void _removeListeners(NotesFolder folder, _FolderListViewState st) {
folder.removeNoteAddedListener(st._noteAdded);
folder.removeNoteRemovedListener(st._noteRemoved);
folder.removeListener(st._folderChanged);
}
@override
void didUpdateWidget(FolderListView oldWidget) {
super.didUpdateWidget(oldWidget);
if (oldWidget.folder != widget.folder) {
_removeListeners(oldWidget.folder, this);
_addListeners(widget.folder, this);
}
}
void _noteAdded(int index, Note _) {
if (_listKey.currentState == null) {
return;
}
_listKey.currentState.insertItem(index);
}
void _noteRemoved(int index, Note note) {
if (_listKey.currentState == null) {
return;
}
_listKey.currentState.removeItem(index, (context, animation) {
var i = deletedViaDismissed.indexWhere((path) => path == note.filePath);
if (i == -1) {
return _buildNote(note, widget.isNoteSelected(note), animation);
} else {
deletedViaDismissed.removeAt(i);
return Container();
}
});
}
void _folderChanged() {
setState(() {});
}
@override
Widget build(BuildContext context) {
if (widget.folder.notes.isEmpty) {
return Center(
child: Text(
widget.emptyText,
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 28.0,
fontWeight: FontWeight.w300,
color: Colors.grey[350],
),
),
);
}
return AnimatedList(
key: _listKey,
itemBuilder: _buildItem,
initialItemCount: widget.folder.notes.length,
);
}
Widget _buildItem(BuildContext context, int i, Animation<double> animation) {
// vHanda FIXME: Why does this method get called with i >= length ?
if (i >= widget.folder.notes.length) {
return Container();
}
var note = widget.folder.notes[i];
return _buildNote(note, widget.isNoteSelected(note), animation);
}
Widget _buildNote(
Note note,
bool selected,
Animation<double> animation,
) {
var settings = Provider.of<Settings>(context);
Widget viewItem = Hero(
tag: note.filePath,
child: widget.noteTileBuilder(context, note),
flightShuttleBuilder: (BuildContext flightContext,
Animation<double> animation,
HeroFlightDirection flightDirection,
BuildContext fromHeroContext,
BuildContext toHeroContext) =>
Material(child: toHeroContext.widget),
);
if (settings.swipeToDelete) {
viewItem = IconDismissable(
key: ValueKey("FolderListView_" + note.filePath),
child: viewItem,
backgroundColor: Colors.red[800],
iconData: Icons.delete,
onDismissed: (direction) {
deletedViaDismissed.add(note.filePath);
var stateContainer = Provider.of<Repository>(context, listen: false);
stateContainer.removeNote(note);
var snackBar = buildUndoDeleteSnackbar(stateContainer, note);
Scaffold.of(context)
..removeCurrentSnackBar()
..showSnackBar(snackBar);
},
);
}
if (selected) {
var borderColor = Theme.of(context).accentColor;
viewItem = Container(
decoration: BoxDecoration(
border: Border.all(color: borderColor, width: selected ? 2.0 : 1.0),
),
child: viewItem,
);
}
return SizeTransition(
key: ValueKey("FolderListView_tr_" + note.filePath),
axis: Axis.vertical,
sizeFactor: animation,
child: viewItem,
);
}
}