feat: Added PyG2O python library

CMakeLists.txt

@@ -115,3 +115,11 @@ add_custom_command(
   COMMAND ${CMAKE_COMMAND} 
   -E copy_directory ${CPYTHON_STDLIB_DIR} $<TARGET_FILE_DIR:${PROJECT_NAME}>/lib
 )
+
+# Copy the PyG2O library into the build/lib folder
+add_custom_command(
+  TARGET ${PROJECT_NAME} 
+  POST_BUILD
+  COMMAND ${CMAKE_COMMAND} 
+  -E copy_directory ${CMAKE_SOURCE_DIR}/g2o $<TARGET_FILE_DIR:${PROJECT_NAME}>/lib/g2o
+)

g2o/__init__.py

@@ -0,0 +1,5 @@
+
+from g2o.events import addEvent
+from g2o.events import callEvent
+from g2o.events import event
+from g2o.events import removeEventHandler

g2o/events.py

@@ -0,0 +1,36 @@
+
+eventList = {}
+
+def callEvent(name, **args):
+    if name in eventList:
+        for event in eventList[name]:
+            event['function'](**args)
+        
+def addEvent(name):
+    if not name in eventList:
+        eventList[name] = []
+        
+def event(name, priority = 9999):
+    def inlineEvt(func):
+        if not name in eventList:
+            pass
+        
+        eventList[name].append({'function': func, 'priority': priority})
+        eventList[name].sort(key = lambda x: x['priority'])
+        return func
+    return inlineEvt
+    
+def removeEventHandler(name, func):
+    if not name in eventList:
+        pass
+    
+    for index, item in enumerate(eventList[name]):
+        if item['function'] == func:
+            del eventList[name][index]
+
+## registering all the events
+
+addEvent('onInit')
+addEvent('onExit')
+addEvent('onTick')
+addEvent('onTime')