NodeMonitor.h

#ifndef __NodeMonitor_h__
#define __NodeMonitor_h__

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// NodeMonitor.h

//
//
// DESCRIPTION:  This class monitors a given node.
//
// AUTHOR: Christian Laforte
//
//

#include <maya/MFnDagNode.h>
#include <maya/MFnDependencyNode.h>
#include <maya/MString.h>
#include <maya/MNodeMessage.h>
#include <maya/MObject.h>
#include <maya/MSelectionList.h>
#include <maya/MStatus.h>

MObject getObjFromName(MString name, MStatus& stat);

// If a problem occurs, this function returns an empty string.
MString getNameFromObj(MObject obj);

// Classes that implement the NodeMonitorManager interfaces
// can be called back when a node is renamed.
class NodeMonitorManager
{
public:
        virtual void onNodeRenamed(MObject& node, MString oldName, MString newName) = 0;
};

class NodeMonitor
{
public:
        NodeMonitor(NodeMonitorManager* manager = NULL);

        ~NodeMonitor();

        bool watch(MString nodeName);
        bool watch(MObject nodeObj);

        void stopWatching();

        bool dirty();

        void cleanIt();

        void setManager(NodeMonitorManager* manager) { fManager = manager; }

private:
        bool attachCallbacks();

        void detachCallbacks();

        void callbackOccured();

        // Callback functions. Those are called, respectively, when a node is dirty (has changed substantially),
        // or when a node is renamed.
        static void watchedObjectDirtyCallback(void* clientData);

        static void watchedObjectRenamedCallback(MObject & node, void* clientData);


private:
        MString fNodeName;
        bool fIsDirty;

        MCallbackId fRenamedCallbackId;
        MCallbackId fDirtyCallbackId;

        NodeMonitorManager* fManager;
};


#endif // MAYA_ShadingConnection