A single tempo change value entered with Finale's Tempo tool. More...

#include <Others.h>

Inheritance diagram for musx::dom::others::TempoChange:

Public Member Functions
	TempoChange (const DocumentWeakPtr &document, Cmper partId, ShareMode shareMode, Cmper cmper, Inci inci)
	Constructor function.

int	getAbsoluteTempo (NoteType noteType=NoteType::Quarter) const
	Computes the absolute tempo represented by the TempoChange Instance.

Public Member Functions inherited from musx::dom::OthersBase
Cmper	getCmper () const
	Gets the `cmper` key value.

std::optional< Inci >	getInci () const
	Gets the optional array index (`inci`).

Public Member Functions inherited from musx::dom::Base
virtual	~Base () noexcept(false)=default
	Virtual destructor for polymorphic behavior.

DocumentPtr	getDocument () const
	Gets a reference to the Document.

Cmper	getPartId () const
	Gets the partId for this instance (or 0 for score)

std::shared_ptr< others::PartDefinition >	getPartDefinition () const
	Gets the others::PartDefinition corresponding to getPartId.

ShareMode	getShareMode () const
	Gets the sharing mode for this instance.

const SharedNodes &	getUnlinkedNodes () const
	Gets the unlinked nodes for this instance. (Only populated for `ShareMode::Partial`)

void	addUnlinkedNode (const std::string &nodeName)
	Adds a shared node for this instance.

virtual void	integrityCheck ()
	Allows a class to determine if it has been properly contructed by the factory and fix issues that it can, such as creating default instances of contained classes.

virtual bool	requireAllFields () const
	Specifies if the parser should alert (print or throw) when an unknown xml tag is found for this class.

Static Public Member Functions
static const xml::XmlElementArray< TempoChange > &	xmlMappingArray ()
	Required for musx::factory::FieldPopulator.

Public Attributes
int	ratio {}

Edu	eduPosition {}
	The position within the measure. (xml node is `<eldur>`)

int	unit {}
	Hardware ticks/sec. For Macs this is 1000.

bool	isRelative

Static Public Attributes
static constexpr std::string_view	XmlNodeName = "tempoDef"
	The XML node name for this type.

Additional Inherited Members
Public Types inherited from musx::dom::Base
enum class	ShareMode { All , Partial , None }
	Describes how this instance is shared between part and score. More...

using	SharedNodes = std::set< std::string >
	The container type for shared nodes.

Protected Member Functions inherited from musx::dom::OthersBase
	OthersBase (const DocumentWeakPtr &document, Cmper partId, ShareMode shareMode, Cmper cmper, std::optional< Inci > inci=std::nullopt)
	Constructs an OthersBase object.

Protected Member Functions inherited from musx::dom::Base
	Base (const DocumentWeakPtr &document, Cmper partId, ShareMode shareMode)
	Constructs the base class and enforces the static constexpr XmlNodeName.

Base &	operator= (const Base &)
	assignment constructor: m_unlinkedNodes is intentionally omitted

Detailed Description

A single tempo change value entered with Finale's Tempo tool.

Although the Finale UI dropped the Tempo tool around 2010, the notation engine still supported them. It was always possible (even as late as Finale 27.4) to add tempo changes using third-pary plugins.

The most common tool for creating TempoChange instances was the plugin JW Tempo. It only ever used absolute ratios, so the focus of this class is on them.

The cmper is the measure number, and incis should be stored in order by eduPosition.

This class is identified by the XML node name "tempoDef".

Member Function Documentation

◆ getAbsoluteTempo()

int musx::dom::others::TempoChange::getAbsoluteTempo ( NoteType noteType = NoteType::Quarter ) const

Computes the absolute tempo represented by the TempoChange Instance.

Parameters

noteType optional note type for which to get the beats per minute. (The default is NoteType::Quarter.)

Returns: The per minute value.

Exceptions

std::logic_error if this instance represents a relative tempo.

Member Data Documentation

◆ isRelative

bool musx::dom::others::TempoChange::isRelative

A computed value that determines if ratio is relative or absolute. This value is not represented in the xml but instead captures whether the ratio property was populated from <relativeRatio> or <absoluteRatio>.

◆ ratio

int musx::dom::others::TempoChange::ratio {}

Absolute or relative ratio. Relative ratios are are a percent value * 10. 100% would have a value of 1000. See getAbsoluteTempo for how to use absolute ratios. The xml provides one of two nodes for this field: <relativeRatio> or <absoluteRatio>.

Public Member Functions

Static Public Member Functions

Public Attributes