Expose hit test

lib/photo_view.dart

@@ -240,6 +240,7 @@ class PhotoView extends StatefulWidget {
     this.onTapUp,
     this.onTapDown,
     this.customSize,
+    this.gestureDetectorBehavior,
   })  : child = null,
         childSize = null,
         super(key: key);
@@ -268,6 +269,7 @@ class PhotoView extends StatefulWidget {
     this.onTapUp,
     this.onTapDown,
     this.customSize,
+    this.gestureDetectorBehavior,
   })  : loadingChild = null,
         imageProvider = null,
         gaplessPlayback = false,
@@ -344,6 +346,9 @@ class PhotoView extends StatefulWidget {
   /// location.
   final PhotoViewImageTapDownCallback onTapDown;
 
+  /// [HitTestBehavior] to be passed to the internal gesture detector.
+  final HitTestBehavior gestureDetectorBehavior;
+
   @override
   State<StatefulWidget> createState() {
     return _PhotoViewState();
@@ -501,6 +506,7 @@ class _PhotoViewState extends State<PhotoView> {
       scaleBoundaries: scaleBoundaries,
       onTapUp: widget.onTapUp,
       onTapDown: widget.onTapDown,
+      gestureDetectorBehavior: widget.gestureDetectorBehavior,
     );
   }
 
@@ -553,6 +559,7 @@ class _PhotoViewState extends State<PhotoView> {
       scaleBoundaries: scaleBoundaries,
       onTapUp: widget.onTapUp,
       onTapDown: widget.onTapDown,
+      gestureDetectorBehavior: widget.gestureDetectorBehavior,
     );
   }
 

lib/photo_view_gallery.dart

@@ -234,6 +234,7 @@ class _PhotoViewGalleryState extends State<PhotoViewGallery> {
             scaleStateCycle: pageOption.scaleStateCycle,
             onTapUp: pageOption.onTapUp,
             onTapDown: pageOption.onTapDown,
+            gestureDetectorBehavior: pageOption.gestureDetectorBehavior,
           )
         : PhotoView(
             key: ObjectKey(index),
@@ -253,6 +254,7 @@ class _PhotoViewGalleryState extends State<PhotoViewGallery> {
             scaleStateCycle: pageOption.scaleStateCycle,
             onTapUp: pageOption.onTapUp,
             onTapDown: pageOption.onTapDown,
+            gestureDetectorBehavior: pageOption.gestureDetectorBehavior,
           );
 
     return ClipRect(
@@ -287,6 +289,7 @@ class PhotoViewGalleryPageOptions {
     this.scaleStateCycle,
     this.onTapUp,
     this.onTapDown,
+    this.gestureDetectorBehavior,
   })  : child = null,
         childSize = null,
         assert(imageProvider != null);
@@ -304,6 +307,7 @@ class PhotoViewGalleryPageOptions {
     this.scaleStateCycle,
     this.onTapUp,
     this.onTapDown,
+    this.gestureDetectorBehavior,
   })  : imageProvider = null,
         assert(child != null),
         assert(childSize != null);
@@ -346,4 +350,7 @@ class PhotoViewGalleryPageOptions {
 
   /// Mirror to [PhotoView.onTapDown]
   final PhotoViewImageTapDownCallback onTapDown;
+
+  /// Mirror to [PhotoView.gestureDetectorBehavior]
+  final HitTestBehavior gestureDetectorBehavior;
 }

lib/src/core/photo_view_core.dart

@@ -19,13 +19,13 @@ class PhotoViewCore extends StatefulWidget {
   const PhotoViewCore({
     Key key,
     @required this.imageProvider,
-    this.backgroundDecoration,
-    this.gaplessPlayback = false,
-    this.heroAttributes,
-    this.enableRotation,
-    this.onTapUp,
-    this.onTapDown,
-    this.index,
+    @required this.backgroundDecoration,
+    @required this.gaplessPlayback,
+    @required this.heroAttributes,
+    @required this.enableRotation,
+    @required this.onTapUp,
+    @required this.onTapDown,
+    @required this.gestureDetectorBehavior,
     @required this.controller,
     @required this.scaleBoundaries,
     @required this.scaleStateCycle,
@@ -37,12 +37,12 @@ class PhotoViewCore extends StatefulWidget {
   const PhotoViewCore.customChild({
     Key key,
     @required this.customChild,
-    this.backgroundDecoration,
-    this.heroAttributes,
-    this.enableRotation,
-    this.onTapUp,
-    this.onTapDown,
-    this.index,
+    @required this.backgroundDecoration,
+    @required this.heroAttributes,
+    @required this.enableRotation,
+    @required this.onTapUp,
+    @required this.onTapDown,
+    @required this.gestureDetectorBehavior,
     @required this.controller,
     @required this.scaleBoundaries,
     @required this.scaleStateCycle,
@@ -52,7 +52,6 @@ class PhotoViewCore extends StatefulWidget {
         gaplessPlayback = false,
         super(key: key);
 
-  final int index;
   final Decoration backgroundDecoration;
   final ImageProvider imageProvider;
   final bool gaplessPlayback;
@@ -69,6 +68,8 @@ class PhotoViewCore extends StatefulWidget {
   final PhotoViewImageTapUpCallback onTapUp;
   final PhotoViewImageTapDownCallback onTapDown;
 
+  final HitTestBehavior gestureDetectorBehavior;
+
   @override
   State<StatefulWidget> createState() {
     return PhotoViewCoreState();
@@ -334,7 +335,7 @@ class PhotoViewCoreState extends State<PhotoViewCore>
         ? widget.customChild
         : Image(
             image: widget.imageProvider,
-            gaplessPlayback: widget.gaplessPlayback,
+            gaplessPlayback: widget.gaplessPlayback ?? false,
           );
   }
 }

lib/src/core/photo_view_gesture_detector.dart

@@ -14,6 +14,7 @@ class PhotoViewGestureDetector extends StatelessWidget {
     this.child,
     this.onTapUp,
     this.onTapDown,
+    this.behavior,
   }) : super(key: key);
 
   final GestureDoubleTapCallback onDoubleTap;
@@ -28,6 +29,8 @@ class PhotoViewGestureDetector extends StatelessWidget {
 
   final Widget child;
 
+  final HitTestBehavior behavior;
+
   @override
   Widget build(BuildContext context) {
     final scope = PhotoViewGestureDetectorScope.of(context);
@@ -69,7 +72,7 @@ class PhotoViewGestureDetector extends StatelessWidget {
     );
 
     return RawGestureDetector(
-      behavior: HitTestBehavior.translucent,
+      behavior: behavior ?? HitTestBehavior.translucent,
       child: child,
       gestures: gestures,
     );