修复:滚动条位置错误

src/UI/Components/MaterialExplorer.tsx

@@ -84,11 +84,21 @@ export class MaterialExplorer extends React.Component<{ materialTable: MaterialT
             let panelEl = this._MaterialListPanelRef.current;
             if (panelEl)
             {
-                let count = this._selectMtls.size;
+                let index = 0;
+                for (let mtl of this._selectMtls)
+                {
+                    for (let [, omtl] of app.Database.MaterialTable.Materials)
+                    {
+                        if (omtl === mtl) break;
+                        index++;
+                    }
+                    break;
+                }
+
                 if (userConfig.isLargeIcon)
-                    panelEl.scrollTop = Math.floor(count / 2) * 120;
+                    panelEl.scrollTop = Math.floor(index / 2) * 120;
                 else
-                    panelEl.scrollTop = Math.floor(count / 3) * 90;
+                    panelEl.scrollTop = Math.floor(index / 3) * 90;
             }
         });
     }