Add dragged file path event in VTK render windows
This MR adds support of drag and drop files in the render window.
It implements the feature for Cocoa (macOS) and Win32 (windows).
Implementation for X (linux) will follow soon.
This MR adds support of drag and drop files in the render window.
It implements the feature for Cocoa (macOS) and Win32 (windows).
Implementation for X (linux) will follow soon.