#include <MItSelectionList.h>

Class Description

Iterate over the items in the selection list.

Class for iterating over the items in an MSelection list. A filter can be specified so that only those items of interest on a selection list can be obtained.

If a filter is specified then the children of DAG selection items will be searched if the selection item does not match the filter. For example, if filter = MFn::kNurbsCurve and a transform is selected then the underlying shape for the transform will be in the iteration if it is a nurbs curve.

Example: (of a simple traversal)

MSelectionList activeList;
MGlobal::activeSelectionList(activeList);
MItSelectionList iter( activeList );
for ( ; !iter.isDone(); iter.next() )
{
    MDagPath item;
    MObject component;
    iter.getDagPath( item, component );
    // do something with it
}

Example: (of a traversal to find all active cameras)

 MSelectionList activeList;
 MGlobal::activeSelectionList(activeList);
 MItSelectionList iter( activeList, MFn::kCamera );
 for ( ; !iter.isDone(); iter.next() )
 {
     MDagPath camera;
     iter.getDagPath( camera );
     MFnCamera cameraFn( camera );
     // ...
}

Examples:: AbcExport/MayaMeshWriter.cpp, AbcImport/CreateSceneHelper.cpp, animExportUtil/animExportUtil.cpp, blindComplexDataCmd/blindComplexDataCmd.cpp, blindDoubleDataCmd/blindDoubleDataCmd.cpp, blindShortDataCmd/blindShortDataCmd.cpp, cleanPerFaceAssignment/cleanPerFaceAssignmentCmd.cpp, closestPointCmd/closestPointCmd.cpp, componentScaleManip/componentScaleManip.cpp, convertEdgesToFacesCmd/convertEdgesToFacesCmd.cpp, convertVerticesToEdgesCmd/convertVerticesToEdgesCmd.cpp, convertVerticesToFacesCmd/convertVerticesToFacesCmd.cpp, createClipCmd/createClipCmd.cpp, customAttrManip/customAttrManip.cpp, cvExpandCmd/cvExpandCmd.cpp, cvPosCmd/cvPosCmd.cpp, dagPoseInfoCmd/dagPoseInfoCmd.cpp, findFileTexturesCmd/findFileTexturesCmd.cpp, fragmentDumper/fragmentDumper.cpp, getAttrAffectsCmd/getAttrAffectsCmd.cpp, helix2Cmd/helix2Cmd.cpp, hwApiTextureTest/hwApiTextureTest.cpp, instancerListCmd/instancerListCmd.cpp, intersectCmd/intersectCmd.cpp, lassoTool/lassoTool.cpp, latticeNoise/latticeNoiseCmd.cpp, lepTranslator/lepTranslator.cpp, lineManip/lineManip.cpp, lineManipContainer/lineManipContainer.cpp, listRichSelectionCmd/listRichSelectionCmd.cpp, lockEvent/lockEvent.cpp, manipOverride/customTriadManip.cpp, manipOverride/manipOverride.cpp, meshOpCmd/meshOpCmd.cpp, motionPathCmd/motionPathCmd.cpp, motionTraceCmd/motionTraceCmd.cpp, moveCurveCVsCmd/moveCurveCVsCmd.cpp, moveManip/moveManip.cpp, moveTool/moveTool.cpp, narrowPolyViewer/narrowPolyViewer.cpp, nodeInfoCmd/nodeInfoCmd.cpp, objExport/objExport.cpp, pointManip/pointManip.cpp, polyRawExporter/polyExporter.cpp, polyX3DExporter/polyExporter.cpp, richMoveCmd/richMoveCmd.cpp, rotateManip/rotateManip.cpp, spiralAnimCurveCmd/spiralAnimCurveCmd.cpp, splitUVCmd/splitUVCmd.cpp, squareScaleManip/squareScaleManip.cpp, surfaceBumpManip/surfaceBumpManip.cpp, surfaceTwistCmd/surfaceTwistCmd.cpp, translateCmd/translateCmd.cpp, viewRenderOverride/viewRenderOverrideOperations.cpp, and whatisCmd/whatisCmd.cpp.

Public Types
enum	selItemType { , kDagSelectionItem, kAnimSelectionItem, kDNselectionItem, kPlugSelectionItem }
	Types of items which can appear on a selection list. More...

Public Member Functions
bool	isDone (MStatus *ReturnStatus=NULL)
	Specifies whether or not there is anything more to iterator over. More...

MStatus	next ()
	Advance to the next item. More...

MStatus	reset ()
	Reset the iterator. More...

MStatus	getDependNode (MObject &depNode)
	This method retrieves the dependency node of the current selection item. More...

MStatus	getDagPath (MDagPath &dagPath, MObject &component)
	This method retrieves the dag path and the components of the current selection item. More...

MStatus	getDagPath (MDagPath &dagPath)
	This method retrieves the dag path of the current selection item. More...

MStatus	getPlug (MPlug &plug)
	This method retrieves the plug of the current selection item. More...

MStatus	getStrings (MStringArray &array)
	Get the string representation of the current item in the selection list. More...

selItemType	itemType (MStatus *ReturnStatus=NULL)
	Returns the current selection item type. More...

MStatus	setFilter (MFn::Type filter)
	Apply a filter to the iteration. More...

bool	hasComponents (MStatus *ReturnStatus=NULL) const
	Returns whether or not the current selection item has components. More...

	MItSelectionList (const MSelectionList &list, MFn::Type=MFn::kInvalid, MStatus *ReturnStatus=NULL)
	Class constructor. More...

virtual	~MItSelectionList ()
	Class destructor. More...

Static Public Member Functions
static const char *	className ()
	Returns the name of this class. More...

Member Enumeration Documentation

enum selItemType

Types of items which can appear on a selection list.

Enumerator
kDagSelectionItem	DAG node or component.
kAnimSelectionItem	keyset
kDNselectionItem	dependency node
kPlugSelectionItem	plug

Constructor & Destructor Documentation

MItSelectionList	(	const MSelectionList &	list,
		MFn::Type	filter = `MFn::kInvalid`,
		MStatus *	ReturnStatus = `NULL`
	)

Class constructor.

Creates a iterator for the given selection list.

NOTE: this class iterates on a copy of the given list and so any changes to the original list will not be reflected upon in this iterator.

Parameters

[in]	list	The selection list to iterate over
[in]	filter	Type filter
[out]	ReturnStatus	Status code

Status Codes:

MS::kSuccess An iterator was successfully set up
MS::kInsufficientMemory No memory
MS::kFailure Error constructing iterator

~MItSelectionList ( )

virtual

Class destructor.

Removes internal iterator data.

Member Function Documentation

bool isDone ( MStatus * ReturnStatus = NULL )

Specifies whether or not there is anything more to iterator over.

Parameters

[out] ReturnStatus Status code

Returns

true if there is nothing else to iterate over
false if there are more items left to iterate over

Status Codes:

MS::kSuccess Method successfully returned a result
MS::kFailure Error, iterator not set up correctly

Examples:: AbcExport/MayaMeshWriter.cpp, AbcImport/CreateSceneHelper.cpp, cleanPerFaceAssignment/cleanPerFaceAssignmentCmd.cpp, convertEdgesToFacesCmd/convertEdgesToFacesCmd.cpp, convertVerticesToEdgesCmd/convertVerticesToEdgesCmd.cpp, convertVerticesToFacesCmd/convertVerticesToFacesCmd.cpp, cvExpandCmd/cvExpandCmd.cpp, findFileTexturesCmd/findFileTexturesCmd.cpp, latticeNoise/latticeNoiseCmd.cpp, lineManip/lineManip.cpp, lineManipContainer/lineManipContainer.cpp, listRichSelectionCmd/listRichSelectionCmd.cpp, lockEvent/lockEvent.cpp, moveCurveCVsCmd/moveCurveCVsCmd.cpp, pointManip/pointManip.cpp, richMoveCmd/richMoveCmd.cpp, squareScaleManip/squareScaleManip.cpp, and whatisCmd/whatisCmd.cpp.

MStatus next ( )

Advance to the next item.

If components are selected then advance to next component.

If a filter is specified then the next item will be one that matches the filter.

Returns: Status code

Status Codes:

MS::kSuccess Advance was successfull
MS::kFailure Advance was not successfull

Examples:: AbcExport/MayaMeshWriter.cpp, AbcImport/CreateSceneHelper.cpp, cleanPerFaceAssignment/cleanPerFaceAssignmentCmd.cpp, lockEvent/lockEvent.cpp, and moveCurveCVsCmd/moveCurveCVsCmd.cpp.

MStatus reset ( )

Reset the iterator.

If a filter has been specified then the current item will be the first selected item that matches the filter.

Returns: Status code

Status Codes:

MS::kSuccess The iterator was successfully reset
MS::kFailure Error resetting iterator

Examples:: cleanPerFaceAssignment/cleanPerFaceAssignmentCmd.cpp.

MStatus getDependNode ( MObject & depNode )

This method retrieves the dependency node of the current selection item.

Parameters

[out] depNode a pointer the the dependency node to be retrieved Returns kNullObj and kFailure if components are selected or selected item does not contain a dependency node.

Returns: Status code

Status Codes:

MS::kSuccess The dependency node was retrieved
MS::kFailure Current item does not match filter

Examples:: fragmentDumper/fragmentDumper.cpp, and lockEvent/lockEvent.cpp.

MStatus getDagPath	(	MDagPath &	dagPath,
		MObject &	component
	)

This method retrieves the dag path and the components of the current selection item.

If components are not selected then NULL is assigned to the component pointer.

Parameters

[out]	dagPath	The dag path of the current selection item.
[out]	component	A pointer to the selected components of the current selection item.

Returns: Status code

Status Codes:

MS::kSuccess The dag path and component was retrieved
MS::kFailure Current item does not match filter

Examples:: AbcExport/MayaMeshWriter.cpp, AbcImport/CreateSceneHelper.cpp, cleanPerFaceAssignment/cleanPerFaceAssignmentCmd.cpp, fragmentDumper/fragmentDumper.cpp, lockEvent/lockEvent.cpp, and moveCurveCVsCmd/moveCurveCVsCmd.cpp.

MStatus getDagPath ( MDagPath & dagPath )

This method retrieves the dag path of the current selection item.

Parameters

[out] dagPath The dag path of the current selection item.

Returns: Status code

Status Codes:

MS::kSuccess The dag path was retrieved
MS::kFailure Current item does not match filter

MStatus getPlug ( MPlug & plug )

This method retrieves the plug of the current selection item.

Parameters

[out] plug The plug of the current selection item.

Returns: Status code

Status Codes:

MS::kSuccess The plug was retrieved
MS::kFailure Current item does not match filter, or there is no current element

MStatus getStrings ( MStringArray & array )

Get the string representation of the current item in the selection list.

It is possible that it will require more than one string to represent the item (the item may contain groups of CVs for example), so a string array is used to pass back the results.

Parameters

[out] array Storage for the returned array.

Returns: Status code

Status Codes:

MS::kSuccess operation successful
MS::kFailure there is no current element

Examples:: lockEvent/lockEvent.cpp.

MItSelectionList::selItemType itemType ( MStatus * ReturnStatus = NULL )

Returns the current selection item type.

Parameters

[out] ReturnStatus Status code

Returns

kDagSelectionItem - selection item is in the DAG
kAnimSelectionItem - selection item is a keyset
kDNselectionItem - selection item is a dependency node

Status Codes:

MS::kSuccess The selection item type was successfully returned
MS::kFailure Iterator error

MStatus setFilter ( MFn::Type filter )

Apply a filter to the iteration.

Selection items not matching the filter type will be excluded from the iteration.

Parameters

[in] filter The MFn::Type that you will be included in the iteration. See MFn.h for possible types.

Returns: Status code

Status Codes:

MS::kSuccess The filter was successfully set
MS::kFailure The was an error setting the filter

bool hasComponents ( MStatus * ReturnStatus = NULL ) const

Returns whether or not the current selection item has components.

Parameters

[out] ReturnStatus Status code

Returns

true the current selection item has components
false the current selection item does not have components

Status Codes:

MS::kSuccess hasComponents successfully returned a result
MS::kFailure operation failed

Examples:: AbcExport/MayaMeshWriter.cpp.

const char * className ( )

static

Returns the name of this class.

Returns: The name of this class.

The documentation for this class was generated from the following files:

MItSelectionList.h
MItSelectionList.cpp

MItSelectionList Class Reference

Class Description

Public Types

Public Member Functions

Static Public Member Functions

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation