AOO410/main/pyuno/demo/hello_world_comp.py

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import uno
import unohelper

from com.sun.star.task import XJobExecutor

# implement a UNO component by deriving from the standard unohelper.Base class
# and from the interface(s) you want to implement.
class HelloWorldJob( unohelper.Base, XJobExecutor ):
    def __init__( self, ctx ):
        # store the component context for later use
        self.ctx = ctx

    def trigger( self, args ):
        # note: args[0] == "HelloWorld", see below config settings

        # retrieve the desktop object
        desktop = self.ctx.ServiceManager.createInstanceWithContext(
            "com.sun.star.frame.Desktop", self.ctx )

        # get current document model
        model = desktop.getCurrentComponent()

        # access the document's text property
        text = model.Text

        # create a cursor
        cursor = text.createTextCursor()

        # insert the text into the document
        text.insertString( cursor, "Hello World", 0 )

# pythonloader looks for a static g_ImplementationHelper variable
g_ImplementationHelper = unohelper.ImplementationHelper()

#
g_ImplementationHelper.addImplementation( \
        HelloWorldJob,                        # UNO object class
        "org.openoffice.comp.pyuno.demo.HelloWorld", # implemenation name
        ("com.sun.star.task.Job",),)          # list of implemented services
                                              # (the only service)