Scroll fix (#633)

* Fix scrolling behaviuor

* Debounce paginated search

assets/release_notes.md

@@ -6,6 +6,7 @@
 - Support "extra line items" for sales orders
 - Display start date for purchase orders
 - Display start date for sales orders
+- Fix scrolling behaviour for some widgets
 - Updated search functionality
 - Updated translations
 

lib/widget/attachment_widget.dart

@@ -60,7 +60,9 @@ class _AttachmentWidgetState extends RefreshableState<AttachmentWidget> {
             prefix: widget.imagePrefix,
           );
           FilePickerDialog.pickImageFromCamera().then((File? file) {
-            upload(context, file);
+            upload(context, file).then((_) {
+              refresh(context);
+            });
           });
         }
       ),
@@ -68,7 +70,9 @@ class _AttachmentWidgetState extends RefreshableState<AttachmentWidget> {
         icon: Icon(TablerIcons.file_upload),
         onPressed: () async {
           FilePickerDialog.pickFileFromDevice().then((File? file) {
-            upload(context, file);
+            upload(context, file).then((_) {
+              refresh(context);
+            });
           });
         }
       )

lib/widget/paginator.dart

@@ -1,3 +1,5 @@
+import "dart:async";
+
 import "package:flutter/material.dart";
 
 import "package:flutter_tabler_icons/flutter_tabler_icons.dart";
@@ -254,6 +256,9 @@ abstract class PaginatedSearchState<T extends PaginatedSearchWidget> extends Sta
   // Text controller
   final TextEditingController searchController = TextEditingController();
 
+  // Debounce timer
+  Timer? _debounceTimer;
+
   // Pagination controller
   final PagingController<int, InvenTreeModel> _pagingController = PagingController(firstPageKey: 0);
 
@@ -307,6 +312,9 @@ abstract class PaginatedSearchState<T extends PaginatedSearchWidget> extends Sta
         }
 
         params["search"] = "${_search}";
+      } else {
+        // Remove search term if it is empty
+        params.remove("search");
       }
 
       // Use custom query ordering if available
@@ -368,11 +376,34 @@ abstract class PaginatedSearchState<T extends PaginatedSearchWidget> extends Sta
 
   // Callback function when the search term is updated
   void updateSearchTerm() {
-    searchTerm = searchController.text;
-    _pagingController.refresh();
 
-    if (mounted) {
+    if (searchTerm == searchController.text) {
-      setState(() {});
+      // No change
+      return;
+    }
+
+    // Debounce the search term
+    if (_debounceTimer?.isActive ?? false) {
+      _debounceTimer?.cancel();
+    }
+
+    if (searchController.text.isEmpty) {
+      // An empty search term evaluates immediately
+      searchTerm = "";
+      _pagingController.refresh();
+
+      if (mounted) {
+        setState(() {});
+      }
+    } else {
+      _debounceTimer = Timer(const Duration(milliseconds: 500), () {
+        searchTerm = searchController.text;
+        _pagingController.refresh();
+
+        if (mounted) {
+          setState(() {});
+        }
+      });
     }
   }
 
@@ -465,12 +496,12 @@ abstract class PaginatedSearchState<T extends PaginatedSearchWidget> extends Sta
         icon: Icon(showSearchWidget ? Icons.zoom_out : Icons.search, size: icon_size)
     ));
 
-    _icons.add(IconButton(
+    // _icons.add(IconButton(
-      onPressed: () async {
+    //   onPressed: () async {
-        updateSearchTerm();
+    //     updateSearchTerm();
-      },
+    //   },
-      icon: Icon(Icons.refresh, size: icon_size),
+    //   icon: Icon(Icons.refresh, size: icon_size),
-    ));
+    // ));
 
     return ListTile(
       title: Text(

lib/widget/refreshable_state.dart

@@ -39,21 +39,14 @@ mixin BaseWidgetProperties {
   // Function to construct a body
   Widget getBody(BuildContext context) {
 
-    // Default body calls getTiles()
+    // Default implementation is to return a ListView
-    return SingleChildScrollView(
+    // Override getTiles to replace the internal context
+    return ListView(
       physics: AlwaysScrollableScrollPhysics(),
-      child: Column(
+      children: getTiles(context),
-        children: [
-          ListView(
-            children: getTiles(context),
-            shrinkWrap: true,
-          )
-        ],
-      )
     );
   }
 
-
   /*
    * Construct the top AppBar for this view
    */
@@ -274,14 +267,6 @@ abstract class RefreshableState<T extends StatefulWidget> extends State<T> with
 
     Widget body = tabs.isEmpty ? getBody(context) : TabBarView(children: getTabs(context));
 
-    // predicateDepth needs to be different based on the child type
-    // hack, determined experimentally
-    int predicateDepth = 0;
-
-    if (tabs.isNotEmpty) {
-      predicateDepth = 1;
-    }
-
     Scaffold view = Scaffold(
       key: scaffoldKey,
       appBar: buildAppBar(context, scaffoldKey),
@@ -291,8 +276,9 @@ abstract class RefreshableState<T extends StatefulWidget> extends State<T> with
       body: RefreshIndicator(
         key: refreshKey,
         notificationPredicate: (ScrollNotification notification) {
-          return notification.depth == predicateDepth;
+          return true;
         },
+
         onRefresh: () async {
           refresh(context);
         },