Fix coarse scroll deltas on macOS

* src/nsterm.m (- mouseDown): Multiply deltas as appropriate.

1 files changed, 4 insertions, 2 deletions

diff --git a/src/nsterm.m b/src/nsterm.m
index 5c19b0cab82..5d39be3a870 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -6658,8 +6658,10 @@ not_in_argv (NSString *arg)
                 ? ceil (fabs (delta)) : 1;
 
               scrollUp = delta > 0;
-              x = [theEvent scrollingDeltaX];
-              y = [theEvent scrollingDeltaY];
+              x = ([theEvent scrollingDeltaX]
+                   * FRAME_COLUMN_WIDTH (emacsframe));
+              y = ([theEvent scrollingDeltaY]
+                   * FRAME_LINE_HEIGHT (emacsframe));
             }
 
           if (lines == 0 && mwheel_coalesce_scroll_events)