OP_Value.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * NAME:        OP library (C++)
 *
 * COMMENTS:    Value for expressing interest in a node...
 *
 */

#ifndef __OP_Value_h__
#define __OP_Value_h__

#include "OP_API.h"
#include <UT/UT_ValArray.h>
#include <UT/UT_WorkBuffer.h>

class OP_Node;
class OP_EventHandler;

typedef enum
{
    OP_CHILD_CREATED,   // A new node has been created -- DATA: ptr to child
    OP_CHILD_REORDERED, // A child's index has been changed 
                        // -- DATA: child ptr

    OP_NODE_DELETED,    // This node was deleted 
    OP_CHILD_DELETED,   // Let the network know about the above.

    OP_CHILD_UNSTOWED,  // These are used by OH to signal that an OH gadget
    OP_NODE_STOWED,     // is stow/unstowed and should have interests added
                        // or removed appropriately.
    OP_NODE_HIDDEN,     // Almost the same as a STOWED. UNSTOW is opposite.
    OP_CHILD_REVEALED,  // Almost the same as a UNSTOWED. STOW is opposite.
    OP_CHILD_HIDDEN,    // Let network know about the above.

    OP_CHILD_SWITCHED,  // Change to networks current, display or render node.

    OP_NAME_CHANGED,    // This node's name changed

    // these five need to be propagated to dependents so that we can recook
    OP_INPUT_REWIRED,   // One of this node's inputs was connected to
                        // a different node     -- DATA: input index
    OP_INPUT_CHANGED,   // One of the input nodes has changed
    OP_FLAG_CHANGED,    // Something like the display flag changed


    // of the following three events, each implies the preceeding ones
    OP_PARM_UICHANGED,  // A parameter's appearance changed
                        // -- DATA: parm index
    OP_PARM_CHANGED,    // A parameter's value changed -- DATA: parm index
    OP_PARM_ANIMATED,   // One of the node's channels has changed in a drastic
                        // way eg keyframe added/removed -- DATA: parm index
    OP_PARM_CHANNELS,   // A channel has been added, deleted, or renamed
                        // -- DATA: parm index

    OP_UI_CHANGED,      // for example error status, current, selected
                        // -- DATA: OP_UIChangeType 
    OP_UI_CURRENT_CHANGED,      // The current node has been set when emitted
                                // from OPgetDirector() -- DATA: node pointer
    OP_UI_EDIT_CURRENT_CHANGED, // The current node has been set when emitted
                                // from OPgetDirector() and is meant to be
                                // edited -- DATA: node pointer
    OP_UI_EDIT_NETWORK,         // Our picked network has changed.
                                    // This is only emitted from OP_Director 
                                    // -- DATA: network node pointer
    OP_UI_MOVED,        // location change
    OP_OUTPUT_CHANGED,  // the output of a node has changed 
    OP_OUTPUT_CHANGED_FOR_COOK_TYPE, // the output of a node has changed as the
                                     // node changed from cooking for render to
                                     // cooking for display or vice versa.
                                     // This change, unlike OP_OUTPUT_CHANGED,
                                     // is not propagated to dependents!
                                     // -- DATA: 0 = cooked for display
                                     // -- DATA: 1 = cooked for render
    OP_GROUPLIST_CHANGED,// The network group list or selection has changed
    OP_INDIRECT_CREATED,// An OP_IndirectInput object was added to the net
    OP_INDIRECT_DELETED,// or deleted from the net.

    OP_COOKING_CHANGED, // current status of cook state (for performance)

    OP_GROUP_CREATED,   // An OP_Group object was added to the net
    OP_GROUP_DELETED,   // or deleted from the net.
    OP_GROUP_CHANGED,   // An OP_Group was renamed or its membership
                        // changed.

    OP_DATA_COOKSELECTION_CHANGED, // The data's cook selection changed
    OP_DATA_USERSELECTION_CHANGED, // The data's user selection changed

    // These CHGROUP events are only triggered on the OP_Director
    // data is (CH_Group*)
    OP_CHGROUP_CREATED,         // Channel group added (must be first)
    OP_CHGROUP_REMOVED,         // Channel group removed
    OP_CHGROUP_RENAMED,         // Channel group renamed
    OP_CHGROUP_MOVED,           // Channel group changed index
    OP_CHGROUP_SELCHANGED,      // Group selection changed
    OP_CHGROUP_CURCHANGED,      // Current group changed
    OP_CHGROUP_CHANGED,         // Channel group membership has changed
                                // (stays last)

    OP_CHPLAYBACK_CHANGED,      // Paramaters which affect playback 
                                // were changed (eg, framerate, limits)

    OP_INPUT_RENAMED,           // One of our inputs was renamed

    OP_CHSCOPE_CHANGED,         // Channel scope has changed (only OP_Director)
    OP_CHSCOPEPIN_CHANGED,      // Channel selection has changed
    OP_CHSCOPESELECTION_CHANGED,// Channel selection has changed
                                // (only OP_Director)
    OP_CHSCOPE_DISPLAY_CHANGED, // Channel selection has changed
                                // (only OP_Director)
    OP_CHSCOPE_GRAPH_SELECTION_CHANGED, // Channel selection has changed
                                // (only OP_Director)

    OP_CHILD_PICK_CHANGED,      // A selection has changed for our children

    OP_NODE_PREDELETE,          // This node will be deleted 

    OP_NETWORKBOX_CREATED,      // A network box was created within the network
                                // -- DATA: OP_NetworkBox*
    OP_NETWORKBOX_DELETED,      // A network box was removed from the network
                                // -- DATA: OP_NetworkBox*
    OP_NETWORKBOX_CHANGED,      // The contents of a network box have changed
                                // -- DATA: OP_NetworkBox*
    OP_NETWORKBOX_STOWED,       // An OP_NetworkBox has been stowed, similar to
                                // OP_NODE_STOWED

    OP_SPAREPARM_MODIFIED,      // A Spare parm was created or deleted.

    OP_MULTIPARM_MODIFIED,      // A Multiparm instance was created or deleted.

    OP_PARM_ENABLE_CHANGED,     // Parm's enable state changed.
                                // -- DATA: parm index

    OP_POSTIT_NOTE_CREATED,     // A post it note was created within the network
    OP_POSTIT_NOTE_DELETED,     // A post it note was removed from the network
    OP_POSTIT_NOTE_CHANGED,     // The contents of a post it note have changed
    OP_POSTIT_NOTE_STOWED,      // An OP_PostIt has been stowed, similar to
                                // OP_NODE_STOWED
    OP_UI_POSTIT_MOVED,

    OP_UI_REFRESH_EXPOSED,      // Send after an event that could have changed
                                // exposed flags in a network. 

    OP_PARM_VISIBLE_CHANGED,    // Parms' visible state changed.
                                // -- DATA: parm index

    OP_CUSTOM_DATA_CHANGED,     // Some custom data held on the node changed.
                                // -- DATA: node-specific enum indicating
                                // exactly which bit of custom data changed

    OP_WORK_ITEM_SELECTION_CHANGED, // The selected work item was changed
                                    // --  DATA: work item ID, unique to the
                                    // TOP network that the event was emitted
                                    // from
    
    OP_EVENT_TYPE_COUNT // sentinel

} OP_EventType;

typedef void    (*OP_EventMethod)(OP_Node *caller, void *callee,
                                  OP_EventType type, void *data);

OP_API extern const char *OPeventToString(OP_EventType type);

// UTformat support.
static inline size_t
format(char *buffer, size_t buffer_size, const OP_EventType &v)
{
    UT_WorkBuffer       eventtext;
    eventtext.sprintf("%s (%d)", OPeventToString(v), (int)(v));
    if (!buffer)
        return eventtext.length();
    else
    {
        size_t len = std::min(size_t(eventtext.length()), buffer_size);
        ::memcpy(buffer, eventtext.buffer(), len);
        return len;
    }
}
class OP_API OP_Value
{
public:
             OP_Value(OP_Node *owner);
            ~OP_Value();

    int          hasOpInterest  (void *data, OP_EventMethod eventHandler) const;
    void         addOpInterest  (void *data, OP_EventMethod eventHandler);
    void         removeOpInterest(void *data, OP_EventMethod eventHandler);
    void         changed        (OP_EventType type, void *data=0) const;

    unsigned     numInterests() const;

    int64 getMemoryUsage(bool inclusive) const;

private:
    UT_ValArray<OP_EventHandler *>       myHandlers;
    OP_Node                             *myOwner;
};

#endif