Custom Panel user drawing capabilities for supported panels. More...

#include <MPanelCanvas.h>

Public Types
enum	DrawLayer
	Principal layer values.

enum	GraphEditorReservedLayer
	Graph Editor reserved layers.

typedef void(*	MDrawUIFunction) (MHWRender::MUIDrawManager &drawMgr, void *userData)
	UI callback function definition.

Public Member Functions
	MPanelCanvas (const MString &panelControlName, MStatus *stat=NULL)
	Constructor. More...

	~MPanelCanvas ()
	Destructor.

bool	supportsUIDrawing ()
	Returns whether the attached panel control supports drawing primitives in screen space. More...

bool	isValid ()
	Returns true if MPanelCanvas has a valid pointer to a Graph Editor object, false otherwise. More...

int	createVertexBuffer (const MTimeArray &xvals, const MFloatArray &yvals, const MColorArray colors=NULL, MStatus stat=NULL)
	Create a vertex buffer with time values as the x-coordinate. More...

int	createVertexBuffer (const MFloatArray &xvals, const MFloatArray &yvals, const MColorArray colors=NULL, MStatus stat=NULL)
	Create a vertex buffer with screen space values as the x and y coordinates. More...

int	createPrimitive (MHWRender::MGeometry::Primitive primType, int vertexBufferId, int startIndex, int numVertices, const MDrawProperties &props, MStatus *stat=NULL)
	Create a primitive of the given type using the vertex buffer specified by the given id, the range of vertices used from the buffer, and a drawing style. More...

MStatus	addPrimitive (int primId, int layer)
	Add the primitive referred to by the given id to the list of primitives to be drawn at the given layer. More...

MStatus	removePrimitive (int primId, int layer)
	Remove the primitive referred to by the given id from the list of primitives to be drawn at the given layer. More...

MStatus	destroyPrimitive (int primId)
	Destroy the primitive referred to by the given id. More...

MStatus	destroyVertexBuffer (int vertId)
	Destroy the vertex buffer referred to by the given id. More...

MStatus	refresh ()
	Force the associated Graph Editor to refresh. More...

MStatus	setAutoRefresh (bool enable)
	Set whether the associated editor will be automatically refreshed. More...

MStatus	setLayerVisible (int layer, bool isVisible)
	Set whether the given layer will be drawn. More...

bool	isLayerVisible (int layer, MStatus *stat=NULL)
	Return whether the given layer is visible. More...

int	registerDrawUICallback (int layer, MDrawUIFunction func, void clientData=NULL, MStatus returnStatus=NULL)
	Register a callback to be called when the given panel is drawing the given layer. More...

void	unregisterDrawUICallback (int callbackId, MStatus *returnStatus=NULL)
	Unregister the callback specified by the given id. More...

Detailed Description

Custom Panel user drawing capabilities for supported panels.

This class provides methods for a user to draw additional primitives to a supporting control. The user can construct this class from the name of a panel which supports such drawing.

Constructor & Destructor Documentation

MPanelCanvas	(	const MString &	editorName,
		MStatus *	ReturnStatus = `NULL`
	)

Constructor.

Attaches to the Graph Editor corresponding the supplied name.

Parameters

[in]	editorName	the name of the Graph Editor (i.e. graphEditor1GraphEd)
[out]	ReturnStatus	the return status

Status Codes:

MS::kSuccess The supplied Graph Editor object name is valid
MS::kFailure The supplied Graph Editor object name is invalid
MS::kNotImplemented The supplied Graph Editor is currently in an unsupported state (stacked curves or normalized display modes)

Member Function Documentation

bool supportsUIDrawing ( )

Returns whether the attached panel control supports drawing primitives in screen space.

If such drawing is not supported, the registerDrawUICallback () method will return MStatus::kNotImplemented.

Note that for the Graph Editor, if the panel for drawing has not yet been created (e.g., when the default Graph Editor has not yet been opened), this method will return false.

Returns: True if this MPanelCanvas supports UI drawing callbacks

bool isValid ( )

Returns true if MPanelCanvas has a valid pointer to a Graph Editor object, false otherwise.

Returns: True if this MPanelCanvas has a valid pointer to a Graph Editor

int createVertexBuffer	(	const MTimeArray &	tVals,
		const MFloatArray &	yVals,
		const MColorArray *	cVals = `NULL`,
		MStatus *	stat = `NULL`
	)

Create a vertex buffer with time values as the x-coordinate.

An id referring to the created buffer is returned.

Parameters

[in]	tVals	Array of time values
[in]	yVals	Array of y values
[in]	cVals	Array of colors
[out]	stat	Status code

Returns: Id associated with the created buffer

int createVertexBuffer	(	const MFloatArray &	xVals,
		const MFloatArray &	yVals,
		const MColorArray *	cVals = `NULL`,
		MStatus *	stat = `NULL`
	)

Create a vertex buffer with screen space values as the x and y coordinates.

An id referring to the created buffer is returned.

Parameters

[in]	xVals	Array of screen space x values
[in]	yVals	Array of screen space y values
[in]	cVals	Array of colors
[out]	stat	Status code

Returns: Id associated with the created buffer

int createPrimitive	(	MHWRender::MGeometry::Primitive	primType,
		int	bufferId,
		int	startIndex,
		int	numVertices,
		const MDrawProperties &	props,
		MStatus *	stat = `NULL`
	)

Create a primitive of the given type using the vertex buffer specified by the given id, the range of vertices used from the buffer, and a drawing style.

An id referring to the created primitive is returned.

Parameters

[in]	primType	Primitive type
[in]	bufferId	Id of vertex buffer to use
[in]	startIndex	Index of first vertex in buffer
[in]	numVertices	Number of vertices in the primitive, starting at startIndex
[in]	props	Draw properties of the primitive, where applicable
[out]	stat	Status code

Returns: Id associated with the created primitive

MStatus addPrimitive	(	int	primitiveId,
		int	layerId
	)

Add the primitive referred to by the given id to the list of primitives to be drawn at the given layer.

Parameters

[in]	primitiveId	Id of the primitive being added
[in]	layerId	Id of the layer to which the primitive is being added

Returns: status code

Status Codes:

MS::kSuccess Method was successful
MS::kFailure Object or parameter error

MStatus removePrimitive	(	int	primitiveId,
		int	layerId
	)

Remove the primitive referred to by the given id from the list of primitives to be drawn at the given layer.

The primitive will not be destroyed.

Parameters

[in]	primitiveId	Id of the primitive being removed
[in]	layerId	Id of the layer from which the primitive is being removed

Returns: status code

Status Codes:

MS::kSuccess Method was successful
MS::kFailure Object or parameter error

MStatus destroyPrimitive ( int primitiveId )

Destroy the primitive referred to by the given id.

A primitive can only be destroyed if it is not present in any of the layers.

Parameters

[in] primitiveId Id of the primitive being removed

Returns: status code

Status Codes:

MS::kSuccess Method was successful
MS::kFailure Object or parameter error

MStatus destroyVertexBuffer ( int bufferId )

Destroy the vertex buffer referred to by the given id.

If the buffer is being used by a primitive, an error will be generated.

Parameters

[in] bufferId Id of vertex buffer to destroy.

Returns: status code

Status Codes:

MS::kSuccess Method was successful
MS::kFailure Object or parameter error

MStatus refresh ( )

Force the associated Graph Editor to refresh.

Returns: status code

Status Codes:

MS::kSuccess Method was successful
MS::kFailure Object or parameter error

MStatus setAutoRefresh ( bool enable )

Set whether the associated editor will be automatically refreshed.

Initially, automatic refresh is enabled.

Parameters

[in] enable Enables auto refresh if True, disable otherwise

Returns: status code

Status Codes:

MS::kSuccess Method was successful
MS::kFailure Object or parameter error

MStatus setLayerVisible	(	int	layerId,
		bool	isVisible
	)

Set whether the given layer will be drawn.

All layers are initially set to be visible. Only user defined layers may have their visibility set.

Parameters

[in]	layerId	Id of the layer to be made visible or invisible
[in]	isVisible	If true, the layer is made visible, otherwise invisible

Returns: status code

Status Codes:

MS::kSuccess Method was successful
MS::kFailure Object or parameter error

bool isLayerVisible	(	int	layerId,
		MStatus *	stat = `NULL`
	)

Return whether the given layer is visible.

Parameters

[in]	layerId	Id of the layer to be made visible or invisible
[out]	stat	Status code

Returns: True if the specified layer is visible, false otherwise

int registerDrawUICallback	(	int	layerId,
		MDrawUIFunction	cb,
		void *	clientData = `NULL`,
		MStatus *	stat = `NULL`
	)

Register a callback to be called when the given panel is drawing the given layer.

An id to the callback is returned.

Parameters

[in]	layerId	Id of the layer to be made visible or invisible
[in]	cb	Callback function to be registerd
[in]	cliendData	Data to be passed to callback when it is invoked
[out]	stat	Status code

Returns: Id associated with the registered callback

void unregisterDrawUICallback	(	int	callbackId,
		MStatus *	stat = `NULL`
	)

Unregister the callback specified by the given id.

Parameters

[in]	callbackId	Id of the callback being removed
[out]	stat	Status code

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

MPanelCanvas.h
MPanelCanvas.cpp

Public Types

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation