ENH: adds hook for loading directory archetypes #1089
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When a directory is added via the Add Data dialog, it may contain a collection of files that should be treated as a single MRML data type, such as a series of image files that get loaded as a volume. This change allows a qSlicerFileReader subclass to define a method that can examine the contents of a directory and filter out any files that should be loaded as a group. One of these files then serves as the archetype and the io properties can be configured such that the files are loaded correctly. The qSlicerVolumesReader and related classes have been updated to use the hooks for reading multiple image files as a volume by default.
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When a directory is added via the Add Data dialog,
it may contain a collection of files that should be
treated as a single MRML data type, such as a series
of image files that get loaded as a volume.
This change allows a qSlicerFileReader subclass to define
a method that can examine the contents of a directory and
filter out any files that should be loaded as a group. One
of these files then serves as the archetype and the io properties
can be configured such that the files are loaded correctly.