diff --git a/src/lib/layout/Desktop.ts b/src/lib/layout/Desktop.ts
index 57300ac..0b79a9a 100644
--- a/src/lib/layout/Desktop.ts
+++ b/src/lib/layout/Desktop.ts
@@ -101,7 +101,7 @@ class Desktop {
     }
 
     private getVisibleRange(scrollX: number) {
-        return new Range.Basic(scrollX, this.tilingArea.width);
+        return Range.create(scrollX, this.tilingArea.width);
     }
 
     public getCurrentVisibleRange() {
diff --git a/src/lib/layout/Range.ts b/src/lib/layout/Range.ts
index 20b8ecd..b2b7a0d 100644
--- a/src/lib/layout/Range.ts
+++ b/src/lib/layout/Range.ts
@@ -5,7 +5,7 @@ type Range = {
 };
 
 namespace Range {
-    export class Basic {
+    class Basic {
         constructor(
             private readonly x: number,
             private readonly width: number,
@@ -24,6 +24,10 @@ namespace Range {
         }
     }
 
+    export function create(x: number, width: number) {
+        return new Basic(x, width);
+    }
+
     export function fromRanges(leftRange: Range, rightRange: Range) {
         const left = leftRange.getLeft();
         const right = rightRange.getRight();