[Matlab GUI] Implementing drag and drop

1. Using Java Swing (Matlab FileExchange)
http://jp.mathworks.com/matlabcentral/fileexchange/53511-drag---drop-functionality-for-java-gui-components

2. Drag and drop of the graphic objects
https://www.mathworks.com/matlabcentral/answers/94681-how-do-i-implement-drag-and-drop-functionality-in-matlab

3. Stackoverflow
https://stackoverflow.com/questions/36833181/drag-and-drop-files-in-matlab-gui