fix: check if getResolutionForZoom can be called in feature styler (m…

…icrosoft#149)
BUAANameNotFound · Apr 8, 2020 · ce19588 · ce19588
1 parent a6667e9
commit ce19588
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Showing 2 changed files with 9 additions and 3 deletions.
diff --git a/src/react/components/common/imageMap/imageMap.tsx b/src/react/components/common/imageMap/imageMap.tsx
@@ -128,7 +128,11 @@ export class ImageMap extends React.Component<IImageMapProps> {
     }
 
     public getResolutionForZoom = (zoom: number) => {
-        return this.map.getView().getResolutionForZoom(zoom);
+        if (this.map && this.map.getView()) {
+            return this.map.getView().getResolutionForZoom(zoom);
+        } else {
+            return null;
+        }
     }
 
     /**

diff --git a/src/react/components/pages/editorPage/canvas.tsx b/src/react/components/pages/editorPage/canvas.tsx
@@ -702,7 +702,8 @@ export default class Canvas extends React.Component<ICanvasProps, ICanvasState>
             return new Style({
                 image: new Icon({
                     opacity: 0.3,
-                    scale: this.imageMap.getResolutionForZoom(3) / resolution,
+                    scale: this.imageMap && this.imageMap.getResolutionForZoom(3) ?
+                           this.imageMap.getResolutionForZoom(3) / resolution : 1,
                     anchor: [.95, 0.15],
                     anchorXUnits: "fraction",
                     anchorYUnits: "fraction",
@@ -713,7 +714,8 @@ export default class Canvas extends React.Component<ICanvasProps, ICanvasState>
             return new Style({
                 image: new Icon({
                     opacity: 1,
-                    scale: this.imageMap.getResolutionForZoom(3) / resolution,
+                    scale: this.imageMap && this.imageMap.getResolutionForZoom(3) ?
+                           this.imageMap.getResolutionForZoom(3) / resolution : 1,
                     anchor: [.95, 0.15],
                     anchorXUnits: "fraction",
                     anchorYUnits: "fraction",