![]() ![]() This will turned uppercaseĪnd prefixed with PLUGIN_ before being made available on ,Į.g. Key: A key for the permission to be used for referring to it from source code. additional_permissions_hook ( * args, ** kwargs ) ![]() Let’s assume we have the following plugin ordertest which defines a new Hook handlers with a order number, taking their identifier as the second sorting criteria, then after that appendĪll hook handlers without a order number sorted only by their identifier.Īn example should help clear this up. They way this works is that OctoPrint will first sort all registered Of registering only a callback as hook handler, it is also possible to register a 2-tuple consisting of a callback andĪn integer value used for ordering handlers. Hooks may also define an order number to allow influencing the execution order of the registered hook handlers. info ( "Received \" custom \" action from printer" ) _plugin_name_ = "Custom action command" _plugin_pythoncompat_ = ">=2.7,<4" def _plugin_load_ (): plugin = CustomActionCommandPlugin () global _plugin_implementation_ _plugin_implementation_ = plugin global _plugin_hooks_ _plugin_hooks_ = Execution Order OctoPrintPlugin ): def custom_action_handler ( self, comm, line, action, * args, ** kwargs ): if not action = "custom" : return self. # coding=utf-8 import ugin class CustomActionCommandPlugin ( octoprint. _plugin_hooks_ property and itself to the _plugin_implementation_ property. Property instead, manually instantiate your implementation instance and then add its hook handler method to the Instead of defining it directly via _plugin_hooks_ utilize the _plugin_load_ ![]() Need access to instance variables handed to your implementation via mixin invocations), you can get this workīy using a small trick. If you want your hook handler to be an instance method of a mixin implementation of your plugin (for example since you To register themselves with the Software Update Plugin by returning their own update check configuration. For example, the Software Update Pluginĭeclares a custom hook “_config” which other plugins can add handlers for in order Plugins can easily add their own hooks too. OctoPrint will then takeĬare to add prefix and suffix as necessary after a small round of preprocessing. Return a 2-tuple of prefix and postfix if has something for either of those, otherwise None. The general type of script for which to look for additions (“gcode”) and the script name for which to look (e.g.īeforePrintStarted for the GCODE script executed before the beginning of a print job). split ( " \n " )) if isinstance ( data, ( list, tuple )): return list ( data ) else : return None prefix, suffix = map ( to_list, retval ) if prefix : scriptLines = list ( prefix ) scriptLines if suffix : scriptLines = list ( suffix )Īs you can see, the hook’s method signature is defined to take the current self (as in, the current comm layer instance), exception ( "Error while processing gcodescript hook %s " % hook ) else : if retval is None : continue if not isinstance ( retval, ( list, tuple )) or not len ( retval ) = 2 : continue def to_list ( data ): if isinstance ( data, str ): data = map ( x. _gcodescript_hooks ( self, "gcode", scriptName ) except Exception : self. _gcodescript_hooks : try : retval = self. Or as postfix (after the existing lines). Lines to OctoPrint’s GCODE scripts, either as prefix (before the existing lines) OctoPrint will call the hook with the define parameters and process the result depending on the hook.Īn example for a hook within OctoPrint is, which allows adding additional Or a 2-tuple of hook callback and order value as value.Įach hook defines a contract detailing the call parameters for the hook handler method and the expected return type. This control property is a dictionary consisting of the implemented hooks’ names as keys and either the hook callback Implementations, plugins inform OctoPrint about hook handlers using a control property, _plugin_hooks_. Where mixins are based on classes, hooks are based on methods. Hooks are the smaller siblings of mixins, allowing to extend functionality or data processing where a custom mixin type ![]()
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