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): true (1) if the callback handled the multi attribute, false (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): true (1) if the callback handled the attribute, false (0) if Maya should provide its default handling.

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

• 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.

• 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.