Fix for T78211: Trackpad Zoom to Mouse Position Error

When using a trackpad Zoom to Mouse Position would always zoom to center of canvas.

Differential Revision: https://developer.blender.org/D8683

Reviewed by Brecht Van Lommel

1 files changed, 5 insertions, 8 deletions

diff --git a/source/blender/editors/interface/view2d_ops.c b/source/blender/editors/interface/view2d_ops.c
index de57e7fc608..258516a1c61 100644
--- a/source/blender/editors/interface/view2d_ops.c
+++ b/source/blender/editors/interface/view2d_ops.c
@@ -1233,6 +1233,11 @@ static int view_zoomdrag_invoke(bContext *C, wmOperator *op, const wmEvent *even
   v2d = vzd->v2d;
 
   if (U.uiflag & USER_ZOOM_TO_MOUSEPOS) {
+    ARegion *region = CTX_wm_region(C);
+
+    /* Store initial mouse position (in view space). */
+    UI_view2d_region_to_view(
+        &region->v2d, event->mval[0], event->mval[1], &vzd->mx_2d, &vzd->my_2d);
     vzd->zoom_to_mouse_pos = true;
   }
 
@@ -1279,14 +1284,6 @@ static int view_zoomdrag_invoke(bContext *C, wmOperator *op, const wmEvent *even
   /* for modal exit test */
   vzd->invoke_event = event->type;
 
-  if (U.uiflag & USER_ZOOM_TO_MOUSEPOS) {
-    ARegion *region = CTX_wm_region(C);
-
-    /* store initial mouse position (in view space) */
-    UI_view2d_region_to_view(
-        &region->v2d, event->mval[0], event->mval[1], &vzd->mx_2d, &vzd->my_2d);
-  }
-
   if (v2d->keepofs & V2D_LOCKOFS_X) {
     WM_cursor_modal_set(window, WM_CURSOR_NS_SCROLL);
   }