emit BeforeWorkfileSave event in workfiles tool

openpype/hosts/maya/api/__init__.py

@@ -218,7 +218,8 @@ def on_task_changed(*args):
     )
 
 
-def before_workfile_save(workfile_path, workdir_path):
+def before_workfile_save(event):
+    workdir_path = event.workdir_path
     if workdir_path:
         copy_workspace_mel(workdir_path)
 

openpype/pipeline/lib/events.py

@@ -31,10 +31,16 @@ class BaseEvent(object):
 
     @classmethod
     def emit(cls, *args, **kwargs):
+        """Create object of event and emit.
+
+        Args:
+            Same args as '__init__' expects which may be class specific.
+        """
         from avalon import pipeline
 
         obj = cls(*args, **kwargs)
         pipeline.emit(obj.topic, [obj])
+        return obj
 
 
 class BeforeWorkfileSave(BaseEvent):

openpype/tools/workfiles/app.py

@@ -11,6 +11,7 @@ from Qt import QtWidgets, QtCore
 from avalon import io, api, pipeline
 
 from openpype import style
+from openpype.pipeline.lib import BeforeWorkfileSave
 from openpype.tools.utils.lib import (
     qt_app_context
 )
@@ -670,7 +671,7 @@ class FilesWidget(QtWidgets.QWidget):
             os.path.normpath(self._workfiles_root), work_file
         )
 
-        pipeline.emit("before.workfile.save", [file_path, self._workdir_path])
+        BeforeWorkfileSave.emit(file_path, self._workdir_path)
 
         self._enter_session()   # Make sure we are in the right session
         self.host.save_file(file_path)