Delete button does not delete the content - flutter

Question

There are no error messages, but the delete button does not delete the selected content when I click on Delete.
The page shows a series of activities in sequence. The user should be able to edit or delete the individual activity when selected.
I do not find and understand the problem, can you help me find the error please ?
This is the code:
class AllTasksView extends GetView<HomeController> {
#override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
height: Get.height,
width: Get.width,
color: Theme.of(context).scaffoldBackgroundColor,
//padding: EdgeInsets.symmetric(horizontal: 30, vertical: 50),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Padding(
padding: EdgeInsets.only(top: 50, left: 25, right: 25),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(
'All Tasks',
style: kSubHeadTextStyle.copyWith(
color: Theme.of(context).primaryColorDark),
),
IconButton(
icon: Icon(
// FontAwesomeIcons.history,
FontAwesomeIcons.clockRotateLeft,
color: Theme.of(context).primaryColor,
size: 24,
),
onPressed: () {
Get.to(() => PastTasksView());
},
),
],
),
),
SizedBox(height: Get.height * 0.012),
GetBuilder<HomeController>(
id: 1,
builder: (controller) {
return Expanded(
child: ListView.builder(
itemBuilder: (context, index) {
final task = controller.commingTasks[index]!;
return Slidable(
// actionPane: SlidableBehindActionPane(),
// actionExtentRatio: 0.2,
// controller: controller.slideC,
child: ExpandedContainer(
icon: task.taskImage,
title: task.taskTitle,
time: task.startTime,
desc: task.taskDesc,
ifDate: true,
date: DateFormat.yMMMd().format(task.taskDate!),
),
startActionPane: ActionPane(
motion: BehindMotion(),
children: [
SlidableAction(
onPressed: (context) {
// controller.slideC.activeState?.close();
Slidable.of(context)?.close();
controller.preUpdateTask(task);
showModalBottomSheet(
backgroundColor: Colors.transparent,
isScrollControlled: true,
context: context,
builder: (context) {
return BottomSheetContent(
buttonText: 'Update Task',
onSubmit: () {
controller.updateTask(task);
},
);
},
) as IconData;
},
label: "Update",
),
],
),
endActionPane: ActionPane(
motion: BehindMotion(),
children: [
SlidableAction(
onPressed: (context) {
// controller.slideC.activeState?.close();
Slidable.of(context)?.close();
controller.customDialogDel(context, task);
},
label: "Delete",
),
],
),
);
},
itemCount: controller.commingTasks.length,
),
);
},
),
],
),
),
);
}
}
This is the code to delete task by id
/// [ function to delete task by ID ]
deleteTask(Task task) async {
int index = allTasks.indexOf(task);
allTasks.removeAt(index);
taskRoutine();
reWriteTasks();
update([1, true]);
print(index);
}
And this is the code to delete where is the confirm dialog:
/// [ function to delete confirm dialog ]
Future<dynamic> customDialogDel(BuildContext context, Task task) {
return Get.dialog(Container(
margin: EdgeInsets.symmetric(
vertical: Get.height * 0.35, horizontal: Get.width * 0.18),
padding: EdgeInsets.all(20),
width: Get.width * 0.8,
height: Get.width * 0.8,
decoration: BoxDecoration(
color: Theme.of(context).scaffoldBackgroundColor,
borderRadius: BorderRadius.circular(20),
),
child: ClipRRect(
borderRadius: BorderRadius.circular(20),
child: Scaffold(
backgroundColor: Theme.of(context).scaffoldBackgroundColor,
body: Center(
child: Column(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Text(
'Delete Task!',
style: kSubHeadTextStyle.copyWith(
fontSize: 20,
color: Theme.of(context).primaryColorDark,
),
),
SizedBox(height: 20),
Text(
'Are you sure?',
style: kSubHeadTextStyle.copyWith(
fontSize: 16,
color: Theme.of(context).primaryColorDark,
),
),
SizedBox(height: 40),
Container(
width: 140,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
GestureDetector(
onTap: () {
Get.back();
},
child: Container(
padding: EdgeInsets.symmetric(
vertical: 10, horizontal: 15),
child: Text(
'No',
style: kSubHeadTextStyle.copyWith(
fontSize: 16,
color: Theme.of(context).primaryColorDark,
),
),
decoration: BoxDecoration(
color: Colors.transparent,
border: Border.all(
color: Theme.of(context).primaryColor),
borderRadius: BorderRadius.circular(10),
)),
),
SizedBox(width: 20),
GestureDetector(
onTap: () {
// slideC.activeState?.close();
Slidable.of(context)?.close();
deleteTask(task);
Get.back();
},
child: Container(
padding: EdgeInsets.symmetric(
vertical: 10, horizontal: 15),
child: Text(
'Yes',
style: kSubHeadTextStyle.copyWith(
fontSize: 16,
color: Theme.of(context).primaryColorDark,
),
),
decoration: BoxDecoration(
color: Theme.of(context).primaryColor,
borderRadius: BorderRadius.circular(10),
)),
)
]),
),
],
),
),
),
),
));
}
}