Friday, July 17, 2009

GNUmed plugin development - part 13

Be aware that some things have changed. The file has been moved from test-area/shilbert/ to business/

There are now four files involved in this plugin.
- in /business - responsible for the XML data extraction part
- in /wxpython - responsible for calling and compiling the ui widgets
- in /wxGladeWidgets - is the python code representation of the ui widgets
- gmCardiacDevicePluginPnl.wxg in /wxg - is the xml representation of the ui widgets

If I need to change the plugin's appearance I need to touch first gmCardiacDevicePluginPnl.wxg with wxGlade and transfer it into the python code representation This files gets imported and the controls filled with data in The business logic of data compilation from and to screen is handled in

Next up is getting the device data from the database instead of an XML file. For the time being it was agreed that the xml file is simply stored as yet another document. To store it GNUmed was started and the plugin 'Document import' was used. I was asked for an associated episode. 'Routine postop cardiac device checkup' was entered. 'Device check up' was chosen as document type. This was entered via the menu item 'GNUmed>Manage master data>document types'.

A quick chat with Karsten revealed the basic code:

pat = gmPerson.gmCurrentPatient()
doc_folder = pat.get_document_folder()
docs = doc_folder.get_documents()
This returns a list of cMedDoc objects which can be parsed like that:
for doc in docs:
    doc['comment'] = ... etc.
doc_folder.get_documents() returns elements ordered by clin_when so the first element is the newest one I am looking for.
for doc in docs:
             if doc['type'] == 'cardiac device checkup report':
if not len(selected_docs) == 0:
             # since get_documents() is sorted I simply get the first one as the most recent one
             # for now assume that the xml file provide the cardiac device context.
             # that pretty much means logical connection of leads and generator is provided in the xml
             xml = selected_docs[0].get_parts()[0].export_to_file()
             tree = etree.parse(xml)
             DevicesDisplayed = gmDevices.device_status_as_text(tree)
             for line in DevicesDisplayed:
                        text = text + line
   'There are no device checkup reports in the database')
             text = _('There are no device checkup reports in the database')
To construct the line
xml = selected_docs[0].get_parts()[0].export_to_file()
one has to take a good look at the file in /business. Using that code it is now possible to get the XML from the database and display the current device status.

Currently the XML is entered via the default the 'attach document' plugin. There is a nifty solution to a problem. How to check for documents of a type that might not yet exist in the database ?

When the cardiac device plugin is initiated the document type is automatically added to the document types in the database. The file gmDeviceWidgets holds the following code for that.
def __init__(self, *args, **kwargs):
         # check if report types exist in db, if not create them
         dtype = gmMedDoc.create_document_type('cardiac device checkup report')
         dtype.set_translation(_('cardiac device checkup report'))
The next step is to get rid of saving to a file and reading from that. Another issue is to get refresh going when entering new data.

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