DD::Image::File_KnobI Class Reference

Public Types
enum	ChangeContext {   ChangedFromScript, ChangedFromUser, ChangedFromUserOverride, ChangedFromScriptOverride,   ChangedNone }

Public Member Functions
virtual ChangeContext	getLastChangeContext () const =0
virtual void	cooked_frame (const OutputContext &context, int &frame, bool &black, int &offset)=0
virtual bool	isReadKnob () const =0

Detailed Description

Abstract base class for File Knob-specific methods.

Member Enumeration Documentation

enum DD::Image::File_KnobI::ChangeContext

This enum gives File knobs information about what triggered the last filename change

Member Function Documentation

virtual ChangeContext DD::Image::File_KnobI::getLastChangeContext ( ) const

pure virtual

Get the reason for the last change to this knob's value

virtual void DD::Image::File_KnobI::cooked_frame ( const OutputContext &  context, int &  frame, bool &  black, int &  offset  )

pure virtual

Provide information about the cooked frame based on settings used alongside file path, such as first frame in the sequence, what to do before and after specified range, etc.

Parameters

context	The current context
frame	Output parameter providing actual cooked frame number
black	Output parameter indicating whether cooked frame is outside specified sequence range
offset	Output parameter providing the offset from the specified first frame in the sequence

virtual bool DD::Image::File_KnobI::isReadKnob ( ) const

pure virtual

True if the knob implementing this interface is pointing to a file which used for reading only