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feat(mobile): Add haptic feedback to asset grid #5344

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merged 1 commit into from
Feb 5, 2024
Merged

feat(mobile): Add haptic feedback to asset grid #5344

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47 changes: 45 additions & 2 deletions mobile/lib/modules/home/ui/asset_grid/immich_asset_grid_view.dart
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Original file line number Diff line number Diff line change
@@ -1,19 +1,22 @@
import 'dart:collection';
import 'dart:developer';
import 'dart:math';

import 'package:collection/collection.dart';
import 'package:easy_localization/easy_localization.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:immich_mobile/extensions/build_context_extensions.dart';
import 'package:immich_mobile/extensions/collection_extensions.dart';
import 'package:immich_mobile/modules/asset_viewer/providers/scroll_notifier.provider.dart';
import 'package:immich_mobile/modules/home/ui/asset_grid/thumbnail_image.dart';
import 'package:immich_mobile/shared/models/asset.dart';
import 'package:immich_mobile/extensions/collection_extensions.dart';
import 'package:scrollable_positioned_list/scrollable_positioned_list.dart';

import 'asset_grid_data_structure.dart';
import 'group_divider_title.dart';
import 'disable_multi_select_button.dart';
import 'draggable_scrollbar_custom.dart';
import 'group_divider_title.dart';

typedef ImmichAssetGridSelectionListener = void Function(
bool,
Expand Down Expand Up @@ -76,6 +79,9 @@ class ImmichAssetGridViewState extends State<ImmichAssetGridView> {
final ItemPositionsListener _itemPositionsListener =
ItemPositionsListener.create();

/// The timestamp when the haptic feedback was last invoked
int _hapticFeedbackTS = 0;
DateTime? _prevItemTime;
bool _scrolling = false;
final Set<Asset> _selectedAssets =
LinkedHashSet(equals: (a, b) => a.id == b.id, hashCode: (a) => a.id);
Expand Down Expand Up @@ -414,6 +420,8 @@ class ImmichAssetGridViewState extends State<ImmichAssetGridView> {
if (widget.preselectedAssets != null) {
_selectedAssets.addAll(widget.preselectedAssets!);
}

_itemPositionsListener.itemPositions.addListener(_hapticsListener);
}

@override
Expand All @@ -438,6 +446,41 @@ class ImmichAssetGridViewState extends State<ImmichAssetGridView> {
}
}

void _hapticsListener() {
/// throttle interval for the haptic feedback in microseconds.
/// Currently set to 100ms.
const feedbackInterval = 100000;

final values = _itemPositionsListener.itemPositions.value;
final start = values.firstOrNull;

if (start != null) {
final pos = start.index;
final maxLength = widget.renderList.elements.length;
if (pos < 0 || pos >= maxLength) {
return;
}

final date = widget.renderList.elements[pos].date;

// only provide the feedback if the prev. date is known.
// Otherwise the app would provide the haptic feedback
// on startup.
if (_prevItemTime == null) {
_prevItemTime = date;
} else if (_prevItemTime?.year != date.year ||
_prevItemTime?.month != date.month) {
_prevItemTime = date;

final now = Timeline.now;
if (now > (_hapticFeedbackTS + feedbackInterval)) {
_hapticFeedbackTS = now;
HapticFeedback.heavyImpact();
}
}
}
}

void _scrollToTop() {
// for some reason, this is necessary as well in order
// to correctly reposition the drag thumb scroll bar
Expand Down