ElyTable: zoom and DPI keep the scroll in print twips; drag and zoom tests far down a sheet (R2.16)

crates/ely-lok/src/view/scroll.rs

@@ -49,11 +49,9 @@ impl LokView {
             self.geom.twips_of(self.viewport.0) - fx,
             self.geom.twips_of(self.viewport.1) - fy,
         );
-        // Room past the target, so the clamp lets it show.
-        self.reach = (
-            self.reach.0.max(x + w + vw + fx),
-            self.reach.1.max(y + h + vh + fy),
-        );
+        // Room past the target, in print twips for later zooms.
+        let need = self.print_of((x + w + vw + fx, y + h + vh + fy));
+        self.reach = (self.reach.0.max(need.0), self.reach.1.max(need.1));
         if x >= fx && (x < fx + self.scroll.0 || x + w > fx + self.scroll.0 + vw) {
             self.scroll.0 = x - fx - vw / 2;
         }
@@ -104,10 +102,10 @@ impl LokView {
         if self.fit {
             return self.doc_size;
         }
-        (
+        self.tile_of((
             self.doc_size.0.max(self.reach.0),
             self.doc_size.1.max(self.reach.1),
-        )
+        ))
     }
 
     /// The print-twips document point under a view position (LOK-04).