callbacks

This callback does not have any arguments or return values. In order to preserve the desired look in the Maya UI, these callbacks should add a menu item divider just before returning using: menuItem -divider true.

This callback does not have any arguments.

• returns: a classification string, such as rendernode/myrenderer

• classification (string): classification string belonging to a plugin node, possibly from another plugin
• changeType (string): either loadPlugin or unloadPlugin
• returns: (int) non-zero if your plugin is responsible for nodes of this classification, and a Hypershade rebuild is required

There is no return value for this callback.

• flag (string): flag passed to the Create Render Node dialog command with the leading minus (-) removed
• treeLister (string): the tree lister widget which should be affected

For example, your callback might look like:

global proc myRendererCreateRenderNodeSelectNodeCategoriesCallback(string $flag, string $treeLister){
    if($flag == "allWithMyRendererUp") {
        treeLister -e -selectPath "myrenderer" $treeLister;
    }
}

• classification (string): classification string belonging to a plugin node, possibly from another plugin
• returns: (int) non-zero if your plugin is responsible for nodes of this classification, and the Create Render Node dialog needs to be closed

This callback does not have any arguments.

• returns: a classification string, such as rendernode/myrenderer

• postCommand (string): command to be run after the create command
• type (string): nodeType
• returns: (string) MEL create command

• renderNodeTreeLister (string): the render node tree lister
• postCommand (string): command to be run post-creation
• filterString (string): a space delimited list of filters

• nodeName (string): the name of the node for which the Attribute Editor is being constructed

• nodeName (string): the name of the Shading Engine
• returns (string): the name of the custom shader if applicable

• nodeName (string): the name of the Shading Engine
• returns (string): a colon separated list of the connected custom shaders (shader1:shader2:shader3)

• nodeName (string): the name of the renderLayer node

• menuItemAnchor (string): the name of the menuItem which the new baking menu items should be inserted after.

• objectName (string): the name of the object the right mouse button event occured on.

• menuItemAnchor (string): the name of the menuItem which the new Maya muscle menu items should be inserted after.

• nodeType (string): the type of the node for which the AE is being constructed.
• returns (string): the name of a MEL command or procedure to use as the AETemplate for the requested node type.

• nodeName (string): the name of the node for which the AE is being constructed.
• atributeName (string): the name of the multi attribute.
• uiName (string): the UI name of the attribute.
• changedCommand (string): the MEL command or procedure to be executed when the value of the multi attribute is changed.
• elementIndexString (string): a colon separated list of indices at which the elements of the multi attribute live.
• returns (string): if the callback handled the attribute then it should return the full name of the topmost UI element that it created, otherwise it should return an empty string.

• layoutName (string): the well defined name of the Maya UI component which represents the multi attribute (.
• nodeName (string): the name of the node for which the AE is being constructed.
• atributeName (string): the name of the multi attribute.
• changedCommand (string): the MEL command or procedure to be executed when the value of the multi attribute is changed.
• elementIndexString (string): a colon separated list of indices at which the elements of the multi attribute live.
• returns (int): Return 1 if the callback handled the multi attribute, Return 0 if Maya should provide its default handling.

• nodeName (string): the name of the node for which the AE is being constructed.
• atributeName (string): the name of the attribute.
• uiName (string): the UI name of the attribute.
• changedCommand (string): the MEL command or procedure to be executed when the value of the attribute is changed.
• returns (string): if the callback handled the attribute then it should return the full name of the topmost UI element that it created, otherwise it should return an empty string.

• nodeName (string): the name of the node for which the AE is being constructed.
• atributeName (string): the name of the attribute.
• changedCommand (string): the MEL command or procedure to be executed when the value of the attribute is changed.
• returns (int): Return 1 if the callback handled the attribute, Return 0 if Maya should provide its default handling.

• returns (string): a colon separated list representing the different plugin node classifications.

• classification (string): the classification the nodeTreeBuilder is inquiring about.
• returns (string): a colon separated list representing the different classifications that should be excluded from the classification the nodeTreeBuilder is inquiring about.

• currentFilterString (string): a white-space-separated string representing the current classifications.

• nodeId (string): the node Id of the shading node being queried.
• nodeOwner (string): the name of the plugin the node belongs to.

• nodeName (string): the name of the node for which the Attribute Editor is being constructed.

• nodeType (string): the node type of the node queried.
• attributeType (string): the data type of the input attribute.
• returns (string): the name of the output attribute to use.

• srcType (string): the node type of the source node.
• dstType (string): the node type of the destination node.
• returns (string): A colon separated list of source and destination attribute names.

• nodeName (string): the name of the texture node queried.
• returns (string): the output attribute name of the Texture node.

• nodeName (string): the name of the node for which the Hypergraph node menu is being constructed.

• layerName (string): the name of the render layer for which the popup menu is being constructed.

• shader (string): the name of the shader node being deleted.
• plug (string): the name of the plug queried.
• connection (string): the name of the connection queried.

• srcNode (string): the name of the source node (the dragged node).
• dstNode (string): the name of the destination node (the dropped-on node).
• returns (int): Return 1 if Maya should perform the operation that would normally result from this connection. Return 0 to override and provide custom behavior.

• returns (int): Return 1 if the plugin wants the render pass menu of the render view to be enabled. Return 0 otherwise.

• nodeType (string): The node type of the tree lister node for which the RMB menu is being built.
• scriptCommand (string): The script command associated with the tree lister node for which the RMB menu is being built.
• returns (int): Return 0 if Maya should append its own items to the menu of the current node type. This should be the return value for all node types a plugin isn't explicitly interested in. Return 1 if Maya shouldn't add any of its items to the menu of the current node type. Note: All menu items related to managing the 'Favorites' section of the tree lister will always be added to the RMB menu regardless of the return value (those are treated as special cases).

• presetNodeToSave (string): The name of the preset node being saved.
• returns (string): The custom procedure to use to generate the mel script to be appended to the nodePreset -custom flag of the current presetNode save event (see the documentation of the nodePreset command for more information on the format of the -custom flag).