diff --git a/pyPhotoAlbum/mixins/mouse_interaction.py b/pyPhotoAlbum/mixins/mouse_interaction.py
index a8af0b8..eeb69a8 100644
--- a/pyPhotoAlbum/mixins/mouse_interaction.py
+++ b/pyPhotoAlbum/mixins/mouse_interaction.py
@@ -310,10 +310,18 @@ class MouseInteractionMixin:
                 if hasattr(main_window, "update_scrollbars"):
                     main_window.update_scrollbars()
         else:
-            # Regular wheel: Vertical scroll
-            scroll_amount = delta * 0.5
+            # Regular wheel: Two-finger scroll (vertical and horizontal)
+            delta_x = event.angleDelta().x()
+            delta_y = event.angleDelta().y()
+
+            scroll_amount_x = delta_x * 0.5
+            scroll_amount_y = delta_y * 0.5
+
+            old_pan_x = self.pan_offset[0]
             old_pan_y = self.pan_offset[1]
-            self.pan_offset[1] += scroll_amount
+
+            self.pan_offset[0] += scroll_amount_x
+            self.pan_offset[1] += scroll_amount_y
 
             # Clamp pan offset to content bounds
             if hasattr(self, "clamp_pan_offset"):
@@ -321,8 +329,9 @@ class MouseInteractionMixin:
 
             # If dragging, adjust drag_start_pos to account for pan_offset change
             if self.is_dragging and self.drag_start_pos:
+                pan_delta_x = self.pan_offset[0] - old_pan_x
                 pan_delta_y = self.pan_offset[1] - old_pan_y
-                self.drag_start_pos = (self.drag_start_pos[0], self.drag_start_pos[1] + pan_delta_y)
+                self.drag_start_pos = (self.drag_start_pos[0] + pan_delta_x, self.drag_start_pos[1] + pan_delta_y)
 
             self.update()
 
diff --git a/tests/test_mouse_interaction_mixin.py b/tests/test_mouse_interaction_mixin.py
index 7632eab..81973bc 100755
--- a/tests/test_mouse_interaction_mixin.py
+++ b/tests/test_mouse_interaction_mixin.py
@@ -448,7 +448,7 @@ class TestWheelEvent:
         initial_pan = widget.pan_offset[1]
 
         event = Mock()
-        event.angleDelta = Mock(return_value=Mock(y=Mock(return_value=-120)))  # Scroll down
+        event.angleDelta = Mock(return_value=Mock(x=Mock(return_value=0), y=Mock(return_value=-120)))  # Scroll down
         event.modifiers = Mock(return_value=Qt.KeyboardModifier.NoModifier)
 
         widget.wheelEvent(event)
@@ -489,7 +489,7 @@ class TestWheelEvent:
         initial_pan = widget.pan_offset[1]
 
         event = Mock()
-        event.angleDelta = Mock(return_value=Mock(y=Mock(return_value=120)))  # Scroll up
+        event.angleDelta = Mock(return_value=Mock(x=Mock(return_value=0), y=Mock(return_value=120)))  # Scroll up
         event.modifiers = Mock(return_value=Qt.KeyboardModifier.NoModifier)
 
         widget.wheelEvent(event)
@@ -510,7 +510,7 @@ class TestWheelEvent:
         initial_pan = widget.pan_offset[1]
 
         event = Mock()
-        event.angleDelta = Mock(return_value=Mock(y=Mock(return_value=-120)))  # Scroll down
+        event.angleDelta = Mock(return_value=Mock(x=Mock(return_value=0), y=Mock(return_value=-120)))  # Scroll down
         event.modifiers = Mock(return_value=Qt.KeyboardModifier.NoModifier)
 
         widget.wheelEvent(event)
@@ -890,7 +890,7 @@ class TestWheelEventWhileDragging:
         initial_drag_y = widget.drag_start_pos[1]
 
         event = Mock()
-        event.angleDelta = Mock(return_value=Mock(y=Mock(return_value=120)))  # Scroll up
+        event.angleDelta = Mock(return_value=Mock(x=Mock(return_value=0), y=Mock(return_value=120)))  # Scroll up
         event.modifiers = Mock(return_value=Qt.KeyboardModifier.NoModifier)
 
         widget.wheelEvent(event)