feat: Open ActionPane at the Slidable build time

example/pubspec.lock

@@ -5,58 +5,58 @@ packages:
     dependency: transitive
     description:
       name: async
-      url: "https://pub.dartlang.org"
+      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.8.1"
+    version: "2.11.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
-      url: "https://pub.dartlang.org"
+      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   characters:
     dependency: transitive
     description:
       name: characters
-      url: "https://pub.dartlang.org"
+      sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.1.0"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.1"
+    version: "1.3.0"
   clock:
     dependency: transitive
     description:
       name: clock
-      url: "https://pub.dartlang.org"
+      sha256: cb6d7f03e1de671e34607e909a7213e31d7752be4fb66a86d29fe1eb14bfb5cf
+      url: "https://pub.dev"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   collection:
     dependency: transitive
     description:
       name: collection
-      url: "https://pub.dartlang.org"
+      sha256: ee67cb0715911d28db6bf4af1026078bd6f0128b07a5f66fb2ed94ec6783c09a
+      url: "https://pub.dev"
     source: hosted
-    version: "1.15.0"
+    version: "1.18.0"
   cupertino_icons:
     dependency: "direct main"
     description:
       name: cupertino_icons
-      url: "https://pub.dartlang.org"
+      sha256: d57953e10f9f8327ce64a508a355f0b1ec902193f66288e8cb5070e7c47eeb2d
+      url: "https://pub.dev"
     source: hosted
-    version: "1.0.0"
+    version: "1.0.6"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
-      url: "https://pub.dartlang.org"
+      sha256: "511392330127add0b769b75a987850d136345d9227c6b94c96a04cf4a391bf78"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -74,27 +74,62 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  leak_tracker:
+    dependency: transitive
+    description:
+      name: leak_tracker
+      sha256: "78eb209deea09858f5269f5a5b02be4049535f568c07b275096836f01ea323fa"
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.0.0"
+  leak_tracker_flutter_testing:
+    dependency: transitive
+    description:
+      name: leak_tracker_flutter_testing
+      sha256: b46c5e37c19120a8a01918cfaf293547f47269f7cb4b0058f21531c2465d6ef0
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
+  leak_tracker_testing:
+    dependency: transitive
+    description:
+      name: leak_tracker_testing
+      sha256: a597f72a664dbd293f3bfc51f9ba69816f84dcd403cdac7066cb3f6003f3ab47
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
   matcher:
     dependency: transitive
     description:
       name: matcher
-      url: "https://pub.dartlang.org"
+      sha256: d2323aa2060500f906aa31a895b4030b6da3ebdcc5619d14ce1aada65cd161cb
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.12.16+1"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      sha256: "0e0a020085b65b6083975e499759762399b4475f766c21668c4ecca34ea74e5a"
+      url: "https://pub.dev"
     source: hosted
-    version: "0.12.10"
+    version: "0.8.0"
   meta:
     dependency: transitive
     description:
       name: meta
-      url: "https://pub.dartlang.org"
+      sha256: d584fa6707a52763a52446f02cc621b077888fb63b93bbcb1143a7be5a0c0c04
+      url: "https://pub.dev"
     source: hosted
-    version: "1.7.0"
+    version: "1.11.0"
   path:
     dependency: transitive
     description:
       name: path
-      url: "https://pub.dartlang.org"
+      sha256: "087ce49c3f0dc39180befefc60fdb4acd8f8620e5682fe2476afd0b3688bb4af"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.8.0"
+    version: "1.9.0"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -104,58 +139,66 @@ packages:
     dependency: transitive
     description:
       name: source_span
-      url: "https://pub.dartlang.org"
+      sha256: "53e943d4206a5e30df338fd4c6e7a077e02254531b138a15aec3bd143c1a8b3c"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.8.1"
+    version: "1.10.0"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
-      url: "https://pub.dartlang.org"
+      sha256: "73713990125a6d93122541237550ee3352a2d84baad52d375a4cad2eb9b7ce0b"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.10.0"
+    version: "1.11.1"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
-      url: "https://pub.dartlang.org"
+      sha256: ba2aa5d8cc609d96bbb2899c28934f9e1af5cddbd60a827822ea467161eb54e7
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.2"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
-      url: "https://pub.dartlang.org"
+      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
-      url: "https://pub.dartlang.org"
+      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
+      url: "https://pub.dev"
     source: hosted
-    version: "1.2.0"
+    version: "1.2.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
-      url: "https://pub.dartlang.org"
+      sha256: "5c2f730018264d276c20e4f1503fd1308dfbbae39ec8ee63c5236311ac06954b"
+      url: "https://pub.dev"
     source: hosted
-    version: "0.4.2"
-  typed_data:
+    version: "0.6.1"
+  vector_math:
     dependency: transitive
     description:
-      name: typed_data
-      url: "https://pub.dartlang.org"
+      name: vector_math
+      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.3.0"
-  vector_math:
+    version: "2.1.4"
+  vm_service:
     dependency: transitive
     description:
-      name: vector_math
-      url: "https://pub.dartlang.org"
+      name: vm_service
+      sha256: b3d56ff4341b8f182b96aceb2fa20e3dcb336b9f867bc0eafc0de10f1048e957
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.0"
+    version: "13.0.0"
 sdks:
-  dart: ">=2.12.0 <3.0.0"
+  dart: ">=3.2.0-0 <4.0.0"
   flutter: ">=1.22.0"

lib/src/actions.dart

@@ -84,8 +84,7 @@ class CustomSlidableAction extends StatelessWidget {
           onPressed: () => _handleTap(context),
           style: OutlinedButton.styleFrom(
             backgroundColor: backgroundColor,
-            primary: effectiveForegroundColor,
-            onSurface: effectiveForegroundColor,
+            foregroundColor: effectiveForegroundColor,
             shape: const RoundedRectangleBorder(),
             side: BorderSide.none,
           ),

lib/src/gesture_detector.dart

@@ -77,7 +77,9 @@ class _SlidableGestureDetectorState extends State<SlidableGestureDetector> {
   void handleDragStart(DragStartDetails details) {
     startPosition = details.localPosition;
     lastPosition = startPosition;
-    dragExtent = dragExtent.sign *
+    dragExtent = (widget.controller.ratio != 0 && dragExtent != 0
+            ? dragExtent.sign
+            : widget.controller.ratio.sign) *
         overallDragAxisExtent *
         widget.controller.ratio *
         widget.controller.direction.value;

lib/src/scrolling_behavior.dart

@@ -58,7 +58,7 @@ class _SlidableScrollingBehaviorState extends State<SlidableScrollingBehavior> {
 
   void addScrollingNotifierListener() {
     if (widget.closeOnScroll) {
-      scrollPosition = Scrollable.of(context)?.position;
+      scrollPosition = Scrollable.maybeOf(context)?.position;
       if (scrollPosition != null) {
         scrollPosition!.isScrollingNotifier.addListener(handleScrollingChanged);
       }

lib/src/slidable.dart

@@ -27,6 +27,7 @@ class Slidable extends StatefulWidget {
     this.direction = Axis.horizontal,
     this.dragStartBehavior = DragStartBehavior.down,
     this.useTextDirection = true,
+    this.preOpenedActionPane = ActionPaneType.none,
     required this.child,
   }) : super(key: key);
 
@@ -101,6 +102,11 @@ class Slidable extends StatefulWidget {
   /// {@macro flutter.widgets.ProxyWidget.child}
   final Widget child;
 
+  /// Determines the ActionPane that will be opened at the widget's build without animation.
+  ///
+  /// By default, the action pane is [ActionPaneType.none]
+  final ActionPaneType preOpenedActionPane;
+
   @override
   _SlidableState createState() => _SlidableState();
 
@@ -127,6 +133,7 @@ class _SlidableState extends State<Slidable>
   late final SlidableController controller;
   late Animation<Offset> moveAnimation;
   late bool keepPanesOrder;
+  ActionPaneType preOpenedActionPane = ActionPaneType.none;
 
   @override
   bool get wantKeepAlive => !widget.closeOnScroll;
@@ -168,6 +175,16 @@ class _SlidableState extends State<Slidable>
     controller
       ..enableEndActionPane = endActionPane != null
       ..endActionPaneExtentRatio = endActionPane?.extentRatio ?? 0;
+
+    if (widget.preOpenedActionPane != preOpenedActionPane) {
+      preOpenedActionPane = widget.preOpenedActionPane;
+      if (preOpenedActionPane == ActionPaneType.end && endActionPane != null) {
+        controller.ratio = -controller.endActionPaneExtentRatio;
+      } else if (preOpenedActionPane == ActionPaneType.start &&
+          startActionPane != null) {
+        controller.ratio = controller.startActionPaneExtentRatio;
+      }
+    }
   }
 
   void updateIsLeftToRight() {
@@ -213,6 +230,7 @@ class _SlidableState extends State<Slidable>
   }
 
   ActionPane? get startActionPane => widget.startActionPane;
+
   ActionPane? get endActionPane => widget.endActionPane;
 
   Alignment get actionPaneAlignment {