feat: add zoomBy method #34

daybrush · Sep 29, 2022 · f7f4584 · f7f4584
1 parent c5d485a
commit f7f4584
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/packages/infinite-viewer/src/InfiniteViewerManager.tsx b/packages/infinite-viewer/src/InfiniteViewerManager.tsx
@@ -219,6 +219,18 @@ class InfiniteViewer extends EventEmitter<InfiniteViewerEvents> {
             return this.scrollBy(x - this.getScrollLeft(), y - this.getScrollTop(), options);
         }
     }
+    /**
+     * Set viewer zoom by the given amount
+     */
+    public zoomBy(deltaZoom: number, options?: AnimationOptions) {
+        this._pauseZoomAnimation();
+
+        if (!options || !options.duration) {
+            this._setZoom(this.zoom + deltaZoom);
+        } else {
+            this._startZoomAnimation(deltaZoom, options);
+        }
+    }
     /**
      * Set viewer zoom
      */