Add folder support on URL

[christianesperar]

I think it's good to have an option to have a folder on the parameters instead of multiple files in case there are many files.

[ivmartel]

Hi Christian,
As far as I know, this is impossible using client side JavaScript (as dwv is at the moment). See this stackoverflow question. The File System API has be abandoned in early 2014 with only Chrome and Opera supporting it (http://caniuse.com/#feat=filesystem).

[christianesperar]

That's bad to hear then. How about making some plugin system that will work on other language. This is only optional since one of the feature of DWV is it's javascript only powered reader.

[ivmartel]

In the meantime, I implemented drag and drop support in #113... It works with multiple files.

[ivmartel]

Just to keep some notes on this.
(As of 07/09/2017) Chrome >30, Firefox >50, Edge >14 and Opera >17 support the 'webkitdirectory' option for file input that allows to select / drag and drop folders.

Links:

• caniuse input-file-directory
• developer.mozilla.org webkitdirectory (Firefox 50 release notes)
• stackoverflow does-html5-allow-drag-drop-upload-of-folders-or-a-folder-tree

[ivmartel]

Ok, if major browser allow loading directories, lets do it!

[ivmartel]

I got confused, this issue is for folder support on URL when the webkitdirectory is for local folder support.

Re-closed this one and created #424.

What could solve this issue is using a DICOMDIR, see #425.