Re-renders the spy glass.
ImageViewerSpyGlassInteractiveMode.prototype.invalidate = function()
The mode will automatically re-renders the spy glass when the user move the mouse or through touch. When using an external
canvas for rendering,
it is sometimes desirable to re-render the spy glass based on an external event.
For an example, refer to RedirectCanvas.
Medical Web Viewer .NET
.NET, Java, Android, and iOS/macOS Assemblies
C API/C++ Class Libraries