fix initialization of new processes

Previously the parameters for grid/spiral path patterns were invisible
for new processes. It was necessary to switching the path pattern type
or the path strategy to work around this issue.
Now another signal is emitted to unhide the path pattern paramters.

pycam/Plugins/PathParameters.py

@@ -187,8 +187,10 @@ class PathParamPattern(pycam.Plugins.PluginBase):
                 self.control.get_widget(), weight=5)
         self.control.get_widget().connect("changed", lambda widget: \
                 self.core.emit_event("process-path-pattern-changed"))
-        self.core.register_event("process-path-pattern-list-changed",
-                self._update_selector)
+        self._event_handlers = (
+                ("process-path-pattern-list-changed", self._update_selector),
+                ("process-changed", "process-path-pattern-changed"))
+        self.register_event_handlers(self._event_handlers)
         return True
 
     def _get_value_converter(self, value):
@@ -219,8 +221,7 @@ class PathParamPattern(pycam.Plugins.PluginBase):
 
     def teardown(self):
         self.core.unregister_ui("process_path_parameters", self.control.get_widget())
-        self.core.unregister_event("process-path-pattern-list-changed",
-                self._update_selector)
+        self.unregister_event_handlers(self._event_handlers)
         self.core.get("unregister_parameter")("process", "path_pattern")
         self.core.get("unregister_parameter_group")("path_pattern")
 

pycam/Plugins/Processes.py

@@ -240,6 +240,7 @@ class Processes(pycam.Plugins.ListPluginBase):
             self.core.unblock_event("process-strategy-changed")
             self.core.unblock_event("process-changed")
             self.core.emit_event("process-strategy-changed")
+            self.core.emit_event("process-changed")
         
     def _process_new(self, *args):
         strategies = self.core.get("get_parameter_sets")("process").values()