TF-1616: Fix drag and drop email to mailbox

(cherry picked from commit 324a28c958dd9b4b9f25d7ce18c6a2a4a5c18531)
2023-03-17 15:46:04 +07:00
parent 9c672d4835
commit 55e9a8c8b3
3 changed files with 41 additions and 3 deletions
@@ -93,6 +93,8 @@ class MailboxController extends BaseMailboxController with MailboxActionHandlerM
  final SubscribeMultipleMailboxInteractor _subscribeMultipleMailboxInteractor;

  final currentSelectMode = SelectMode.INACTIVE.obs;
+  final _activeScrollTop = RxBool(false);
+  final _activeScrollBottom = RxBool(true);

  final _openMailboxEventController = StreamController<OpenMailboxViewEvent>();
  final mailboxListScrollController = ScrollController();
@@ -130,8 +132,8 @@ class MailboxController extends BaseMailboxController with MailboxActionHandlerM
    _openMailboxEventController.stream.throttleTime(const Duration(milliseconds: 800)).listen((event) {
      _handleOpenMailbox(event.buildContext, event.presentationMailbox);
    });
-
    _initCollapseMailboxCategories();
+    mailboxListScrollController.addListener(_mailboxListScrollControllerListener);
    super.onReady();
  }

@@ -1127,4 +1129,33 @@ class MailboxController extends BaseMailboxController with MailboxActionHandlerM
      }
    }
  }
+
+  void _mailboxListScrollControllerListener() {
+    _handleScrollTop();
+    _handleScrollBottom();
+  }
+
+  void _handleScrollTop() {
+    if (mailboxListScrollController.position.pixels == 0) {
+      _activeScrollTop.value = false;
+    }
+
+    if (mailboxListScrollController.position.pixels > 40) {
+      _activeScrollTop.value = true;
+    }
+  }
+
+  void _handleScrollBottom() {
+    if (mailboxListScrollController.position.pixels - mailboxListScrollController.position.maxScrollExtent == 0) {
+      _activeScrollBottom.value = false;
+    }
+
+    if (mailboxListScrollController.position.maxScrollExtent - mailboxListScrollController.position.pixels > 40) {
+      _activeScrollBottom.value = true;
+    }
+  }
+
+  bool get activeScrollTop => _activeScrollTop.value;
+
+  bool get activeScrollBottom => _activeScrollBottom.value;
 }