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feat(todo): a task's sub-tasks held and dragged into another order in its sheet

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As a project's rows are (D16): a long press on a sub-task in the task's
sheet or pane lifts it, and dropped on the upper or lower half of
another it goes there, still the task's sub-task (the developer's
review, 10 Nov 2026).

Whats-New: In a task's details, hold a sub-task to drag it into another order.
Whats-New-De: In den Details einer Aufgabe hältst du eine Unteraufgabe gedrückt, um sie in eine andere Reihenfolge zu ziehen.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
This commit is contained in:
Tizian 「ティツィアーン」 2026-11-10 01:19:45 +01:00
commit 607ac71233
Signed by: raisondetredev
GPG key ID: 07F6FCF405488B64
1 changed files with 92 additions and 3 deletions
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46
apps/todo/halkyon_todo_flutter/lib/src/feature/task/widget/task_sheet.dart
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@ -27,6 +27,7 @@ import 'package:halkyon_todo_flutter/src/feature/task/model/task_views.dart';
import 'package:halkyon_todo_flutter/src/feature/task/widget/date_picker.dart';
import 'package:halkyon_todo_flutter/src/feature/task/widget/quick_add_sheet.dart';
import 'package:halkyon_todo_flutter/src/feature/task/widget/repeat_picker.dart';
import 'package:halkyon_todo_flutter/src/feature/task/widget/task_drag.dart';
import 'package:halkyon_todo_flutter/src/feature/task/widget/task_pickers.dart';
import 'package:halkyon_todo_flutter/src/feature/task/widget/task_texts.dart';
import 'package:halkyon_todo_flutter/src/feature/task/widget/task_tile.dart';
@ -782,6 +783,10 @@ class _TaskSheetState() extends State<_TaskSheet> {
final today = Day.of(clock.now());
final project = state.projectOf(content.projectId);
final subTasks = subTasksOf(state.tasks, task.id);
final shownSubTasks = [
for (final sub in subTasks)
if (!(content.hideDoneSubTasks && sub.content.completed)) sub,
];
final labels = {
for (final label in state.labels) label.id: label.content!.name,
};
@ -1009,13 +1014,17 @@ class _TaskSheetState() extends State<_TaskSheet> {
),
),
),
for (final sub in subTasks)
if (!(content.hideDoneSubTasks && sub.content.completed))
for (final (index, sub) in shownSubTasks.indexed)
_placedSubTask(
task,
shownSubTasks,
index,
TaskTile(
task: sub,
selectable: false,
onOpen: (id) => _open(context, id),
),
),
],
TextButton.icon(
icon: const Icon(LucideIcons.plus),
@ -1036,6 +1045,39 @@ class _TaskSheetState() extends State<_TaskSheet> {
);
}
/// The [index]th of [task]'s [subTasks] shown, as [child], held to be
/// dragged to another place among them and taking a drop above or below
/// it, staying [task]'s sub-task (the developer's review, 10 Nov 2026).
static Widget _placedSubTask(
OpenTask task,
List<OpenTask> subTasks,
int index,
Widget child,
) {
final sub = subTasks[index];
final sectionId = sub.content.sectionId;
return TaskDropTarget(
key: ValueKey('drop-${sub.id}'),
projectId: sub.content.projectId,
excluded: sub.id,
above: DropSpot(
sectionId: sectionId,
parentId: task.id,
after: index > 0 ? subTasks[index - 1].content.position : null,
before: sub.content.position,
),
below: DropSpot(
sectionId: sectionId,
parentId: task.id,
after: sub.content.position,
before: index + 1 < subTasks.length
? subTasks[index + 1].content.position
: null,
),
child: DraggableTask(task: sub, child: child),
);
}
/// Asks for the task's reminders and writes them, asking first to
/// remind where nothing was to be reminded of before.
Future<void> _pickReminders(BuildContext context, TaskContent content) async {