Add GetWindowLevel to DicomImageView

src/src/view/dicomimageview.cpp

@@ -587,6 +587,14 @@ void DicomImageView::SetWindowLevel(double level, double width)
     }
 }
 
+void DicomImageView::GetWindowLevel(double &level, double &width) {
+    if (HasSeries())
+    {
+        level = _ImageViewer->GetColorLevel();
+        width = _ImageViewer->GetColorWindow();
+    }
+}
+
 void DicomImageView::ToggleNegativeMode()
 {
     if (HasSeries())