Fix confusing focus position (#364)

* Fix confusing focus position

* v1.6.3

Author: ota-meshi

packages/cheetah-grid/package.json

@@ -1,6 +1,6 @@
 {
   "name": "cheetah-grid",
-  "version": "1.6.2",
+  "version": "1.6.3",
   "description": "Cheetah Grid is a high performance grid engine that works on canvas",
   "keywords": [
     "spreadsheet",

packages/cheetah-grid/src/js/core/DrawGrid.ts

@@ -908,6 +908,17 @@ function _onScroll(grid: DrawGrid, _e: Event): void {
     left: grid[_].scrollable.scrollLeft,
     top: grid[_].scrollable.scrollTop,
   };
+
+  // If the focus is on the header, recalculate and move the focus position.
+  const { focus } = grid[_].selection;
+  const isFrozenCell = grid.isFrozenCell(focus.col, focus.row);
+  if (
+    isFrozenCell &&
+    ((isFrozenCell?.col && moveX) || (isFrozenCell?.row && moveY))
+  ) {
+    grid.setFocusCursor(focus.col, focus.row);
+  }
+
   const visibleRect = _getVisibleRect(grid);
   if (
     Math.abs(moveX) >= visibleRect.width ||

packages/vue-cheetah-grid/package.json

@@ -1,6 +1,6 @@
 {
   "name": "vue-cheetah-grid",
-  "version": "1.6.2",
+  "version": "1.6.3",
   "description": "Cheetah Grid for Vue.js",
   "main": "lib/index.js",
   "unpkg": "dist/vueCheetahGrid.js",