From 62348162102a33fbfe06d91f74c1c85e9f2c3a07 Mon Sep 17 00:00:00 2001
From: Jean-Paul Lekkerkerker <jplekkerkerker@Jean-Pauls-MacBook-Pro.local>
Date: Thu, 31 Jul 2025 09:46:56 +0200
Subject: [PATCH] expose InteractiveViewer onInteractionX-methods

---
 .../pdfx/lib/src/viewer/pinch/pdf_view_pinch.dart | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/packages/pdfx/lib/src/viewer/pinch/pdf_view_pinch.dart b/packages/pdfx/lib/src/viewer/pinch/pdf_view_pinch.dart
index 294ddc98..894712c8 100644
--- a/packages/pdfx/lib/src/viewer/pinch/pdf_view_pinch.dart
+++ b/packages/pdfx/lib/src/viewer/pinch/pdf_view_pinch.dart
@@ -26,6 +26,9 @@ class PdfViewPinch extends StatefulWidget {
     this.onPageChanged,
     this.onDocumentLoaded,
     this.onDocumentError,
+    this.onInteractionStart,
+    this.onInteractionUpdate,
+    this.onInteractionEnd,
     this.builders = const PdfViewPinchBuilders<DefaultBuilderOptions>(
       options: DefaultBuilderOptions(),
     ),
@@ -76,6 +79,15 @@ class PdfViewPinch extends StatefulWidget {
   /// Pdf widget page background decoration
   final BoxDecoration backgroundDecoration;
 
+  /// Called when the user starts a pan or scale gesture on the widget.
+  final GestureScaleStartCallback? onInteractionStart;
+
+  /// Called when the user ends a pan or scale gesture on the widget.
+  final GestureScaleEndCallback? onInteractionEnd;
+
+  /// Called when the user updates a pan or scale gesture on the widget.
+  final GestureScaleUpdateCallback? onInteractionUpdate;
+
   /// Default page builder
   @override
   State<PdfViewPinch> createState() => _PdfViewPinchState();
@@ -564,6 +576,9 @@ class _PdfViewPinchState extends State<PdfViewPinch>
         _reLayout(viewSize);
         final docSize = _docSize ?? const Size(10, 10); // dummy size
         return InteractiveViewer(
+          onInteractionStart: widget.onInteractionStart,
+          onInteractionEnd: widget.onInteractionEnd,
+          onInteractionUpdate: widget.onInteractionUpdate,
           transformationController: _controller,
           scrollControls: InteractiveViewerScrollControls.scrollPans,
           constrained: false,