Merge pull request #343 from thewtex/initialization-fixes

Initialization fixes

Author: thewtex

js/lib/viewer.js

@@ -1660,9 +1660,11 @@ const ViewerView = widgets.DOMWidgetView.extend({
     if (vmin !== null && this.model.hasOwnProperty('itkVtkViewer')) {
       const rendered_image = this.model.get('rendered_image')
       for (let component = 0; component < rendered_image.imageType.components; component++) {
-        const colorRange = this.model.itkVtkViewer.getColorRange(component).slice()
-        colorRange[0] = vmin[component]
-        this.model.itkVtkViewer.setColorRange(component, colorRange)
+        let colorRange = this.model.itkVtkViewer.getColorRange(component)
+        if (colorRange) {
+          colorRange[0] = vmin[component]
+          this.model.itkVtkViewer.setColorRange(component, colorRange)
+        }
       }
     }
   },
@@ -1672,9 +1674,11 @@ const ViewerView = widgets.DOMWidgetView.extend({
     if (vmax !== null && this.model.hasOwnProperty('itkVtkViewer')) {
       const rendered_image = this.model.get('rendered_image')
       for (let component = 0; component < rendered_image.imageType.components; component++) {
-        const colorRange = this.model.itkVtkViewer.getColorRange(component).slice()
-        colorRange[1] = vmax[component]
-        this.model.itkVtkViewer.setColorRange(component, colorRange)
+        let colorRange = this.model.itkVtkViewer.getColorRange(component)
+        if (colorRange) {
+          colorRange[1] = vmax[component]
+          this.model.itkVtkViewer.setColorRange(component, colorRange)
+        }
       }
     }
   },

js/package-lock.json

@@ -63,7 +63,7 @@
     "copy-webpack-plugin": "^5.1.1",
     "css-element-queries": "^1.2.3",
     "itk": "^13.1.1",
-    "itk-vtk-viewer": "^10.5.4",
+    "itk-vtk-viewer": "^10.5.6",
     "jupyter-dataserializers": "^2.2.0",
     "mobx": "^5.15.4",
     "regenerator-runtime": "^0.13.5",