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Created May 15, 2018 02:06
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infopanel.md

How metadata is extracted in Information Panel

  1. Dolphin creates Baloo::FileMetadataWidget
  2. When a single file is clicked Baloo::FileMetadataWidget::setItems is called by Dolphin
  3. The class Baloo::FileMetaDataWidget uses Baloo::FileMetaDataProvider to create a filling job
  4. Then Baloo::FileMetaDataProvider::setFileItem is called and creates an Baloo::IndexedDataRetriever instance.
  5. Then, Baloo::IndexedDataRetriever creates a process using executable baloo_filemetadata_temp_extractor which prints the results gathered by KFileMetaData extractors and Baloo::IndexedDataRetriever reads the standart output.
  6. The results are returned and merged with standard fields and printed in the widget
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