fix: correct scroll position calculation for fractional row indices

Author: Rui-Sun

packages/vtable/src/core/BaseTable.ts

@@ -4992,7 +4992,12 @@ export abstract class BaseTable extends EventTarget implements BaseTableAPI {
     if (isValid(cellAddr.row) && cellAddr.row >= this.frozenRowCount) {
       const frozenHeight = this.getFrozenRowsHeight();
       // const top = this.getRowsHeight(0, cellAddr.row - 1);
-      const top = this.internalProps._rowHeightsMap.getSumInRange(0, cellAddr.row - 1);
+      const rowInt = Math.floor(cellAddr.row);
+      const rowFloat = cellAddr.row - rowInt;
+      let top = this.internalProps._rowHeightsMap.getSumInRange(0, rowInt - 1);
+      if (rowFloat > 0) {
+        top += (this.internalProps._rowHeightsMap.get(rowInt) ?? this.getRowHeight(rowInt)) * rowFloat;
+      }
       this.scrollTop = Math.min(top - frozenHeight, this.getAllRowsHeight() - drawRange.height);
     }
     this.render();

packages/vtable/src/core/animation.ts

@@ -79,8 +79,8 @@ export class TableAnimationManager {
     const to = {
       x: isNumber(col) ? left - this.table.getFrozenColsWidth() : this.table.scrollLeft,
       y: isNumber(row) ? top - this.table.getFrozenRowsHeight() : this.table.scrollTop,
-      targetCol: colInt ?? -1,
-      targetRow: rowInt ?? -1
+      targetCol: col ?? -1,
+      targetRow: row ?? -1
     };
     const duration = !isBoolean(animationOption) ? animationOption?.duration ?? 3000 : animationOption ? 3000 : 0;
     const easing = !isBoolean(animationOption) ? animationOption?.easing ?? 'linear' : animationOption ? 'linear' : '';