Merge pull request #1251

src/scene/model/object.rs

@@ -178,6 +178,7 @@ pub enum GripMenuAction {
     RectangleWidth,
     RectangleHeight,
     RectangleResize,
+    MoveParallel,
     AddVertex,
     RemoveVertex,
     ConvertToArc,

src/scene/pick/grip.rs

@@ -61,6 +61,22 @@ pub enum GripEditMode {
     RectangleWidth,
     RectangleHeight,
     RectangleResize,
+    MoveParallel,
+}
+
+impl GripEditMode {
+    /// Whether typed text belongs in the grip's single dynamic-input field.
+    pub fn uses_scalar_dynamic_input(self) -> bool {
+        matches!(
+            self,
+            Self::Lengthen
+                | Self::Radius
+                | Self::ArcLength
+                | Self::RectangleWidth
+                | Self::RectangleHeight
+                | Self::MoveParallel
+        )
+    }
 }
 
 #[derive(Clone, Debug)]
@@ -125,6 +141,12 @@ impl GripEdit {
         edit
     }
 
+    pub fn move_parallel(handle: Handle, grip_id: usize, world: DVec3) -> Self {
+        let mut edit = Self::single(handle, grip_id, false, world);
+        edit.mode = GripEditMode::MoveParallel;
+        edit
+    }
+
     pub fn rectangle_resize(
         handle: Handle,
         grip_id: usize,
@@ -342,3 +364,16 @@ pub fn find_hit_grip_rte(
     }
     best
 }
+
+#[cfg(test)]
+mod tests {
+    use super::GripEditMode;
+
+    #[test]
+    fn scalar_dynamic_input_modes_include_move_parallel() {
+        assert!(GripEditMode::MoveParallel.uses_scalar_dynamic_input());
+        assert!(GripEditMode::Radius.uses_scalar_dynamic_input());
+        assert!(!GripEditMode::Stretch.uses_scalar_dynamic_input());
+        assert!(!GripEditMode::RectangleResize.uses_scalar_dynamic_input());
+    }
+}