Support folder drops in Signal and Image panels

Author: PierreRaybaut

CHANGELOG.md

@@ -6,7 +6,10 @@ See DataLab [roadmap page](https://datalab-platform.com/en/contributing/roadmap.
 
 💥 New features and enhancements:
 
-* Add "Open from directory" action to the "File" menu for both Signal and Image panels
+* New "Open from directory" feature:
+  * This feature allows to open multiple files from a directory at once, recursively (only the files with the supported extensions by the current panel are opened)
+  * Add "Open from directory" action to the "File" menu for both Signal and Image panels
+  * Add support for folders when dropping files in the Signal and Image panels
 * Add `1/x` operation to the "Operations" menu for both Signal and Image panels:
   * This feature relies on the `numpy.reciprocal` function, and handles the case where the denominator is zero by catching warnings and replacing the `np.inf` values with `np.nan` values
   * Add `compute_inverse` method for image and signal processors

cdl/core/gui/panel/base.py

@@ -962,8 +962,12 @@ def handle_dropped_files(self, filenames: list[str] | None = None) -> None:
         Returns:
             None
         """
+        dirnames = [fname for fname in filenames if osp.isdir(fname)]
         h5_fnames = [fname for fname in filenames if fname.endswith(".h5")]
-        other_fnames = sorted(list(set(filenames) - set(h5_fnames)))
+        other_fnames = sorted(list(set(filenames) - set(h5_fnames) - set(dirnames)))
+        if dirnames:
+            for dirname in dirnames:
+                self.load_from_directory(dirname)
         if h5_fnames:
             self.mainwindow.open_h5_files(h5_fnames, import_all=True)
         if other_fnames: