SkyComposite Class Reference

#include <skycomposite.h>

Inheritance diagram for SkyComposite:

Public Member Functions
	SkyComposite (SkyComposite *parent=nullptr)
	~SkyComposite () override
void	addComponent (SkyComponent *comp, int priority=1024)
QList< SkyComponent * >	components ()
QMap< int, SkyComponent * > &	componentsWithPriorities ()
void	draw (SkyPainter *skyp) override
SkyObject *	findByName (const QString &name, bool exact=true) override
SkyObject *	objectNearest (SkyPoint *p, double &maxrad) override
void	removeComponent (SkyComponent *const comp)
void	update (KSNumbers *num=nullptr) override
Public Member Functions inherited from SkyComponent
	SkyComponent (SkyComposite *parent=nullptr)
virtual void	drawTrails (SkyPainter *skyp)
virtual void	emitProgressText (const QString &message)
QHash< int, QVector< QPair< QString, const SkyObject * > > > &	objectLists ()
QVector< QPair< QString, const SkyObject * > > &	objectLists (int type)
QHash< int, QStringList > &	objectNames ()
QStringList &	objectNames (int type)
virtual void	objectsInArea (QList< SkyObject * > &list, const SkyRegion &region)
SkyComposite *	parent ()
void	removeFromLists (const SkyObject *obj)
void	removeFromNames (const SkyObject *obj)
virtual bool	selected ()
virtual void	updateMoons (KSNumbers *)
virtual void	updateSolarSystemBodies (KSNumbers *)

Detailed Description

SkyComposite is a kind of container class for SkyComponent objects.

The SkyComposite is responsible for distributing calls to functions like draw() and update() to its children, which can be SkyComponents or other SkyComposites with their own children. This is based on the "composite/component" design pattern.

Performance tuning: Sometimes it will be better to override a virtual function and do the work in the composite instead of delegating the request to all sub components.

Author

Thomas Kabelmann

Version

0.1

Definition at line 29 of file skycomposite.h.

Constructor & Destructor Documentation

SkyComposite()

SkyComposite::SkyComposite ( SkyComposite * parent = nullptr )

explicit

Constructor parent pointer to the parent SkyComponent.

Definition at line 12 of file skycomposite.cpp.

~SkyComposite()

SkyComposite::~SkyComposite ( )

override

Destructor

Definition at line 16 of file skycomposite.cpp.

Member Function Documentation

addComponent()

void SkyComposite::addComponent	(	SkyComponent *	comp,
		int	priority = 1024 )

Add a new sub component to the composite comp Pointer to the SkyComponent to be added priority A priority ordering for various operations on the list of all sky components (notably objectNearest())

Definition at line 22 of file skycomposite.cpp.

components()

QList< SkyComponent * > SkyComposite::components ( )

inline

Definition at line 97 of file skycomposite.h.

componentsWithPriorities()

QMap< int, SkyComponent * > & SkyComposite::componentsWithPriorities ( )

inline

Definition at line 102 of file skycomposite.h.

draw()

void SkyComposite::draw ( SkyPainter * skyp )

overridevirtual

Delegate draw requests to all sub components psky Reference to the QPainter on which to paint.

Implements SkyComponent.

Reimplemented in SkyMapComposite.

Definition at line 51 of file skycomposite.cpp.

findByName()

SkyObject * SkyComposite::findByName ( const QString & name, bool exact = true )

overridevirtual

Search the children of this SkyComposite for a SkyObject whose name matches the argument.

The objects' primary, secondary and long-form names will all be checked for a match. name the name to be matched exact If true, it will return an exact match, otherwise it can return a partial match.

Returns

a pointer to the SkyObject whose name matches the argument, or a nullptr pointer if no match was found.

Reimplemented from SkyComponent.

Reimplemented in SkyMapComposite.

Definition at line 64 of file skycomposite.cpp.

objectNearest()

SkyObject * SkyComposite::objectNearest ( SkyPoint * p, double & maxrad )

overridevirtual

Identify the nearest SkyObject to the given SkyPoint, among the children of this SkyComposite p pointer to the SkyPoint around which to search.

maxrad reference to current search radius

Returns

a pointer to the nearest SkyObject

Reimplemented from SkyComponent.

Reimplemented in SkyMapComposite.

Definition at line 75 of file skycomposite.cpp.

removeComponent()

void SkyComposite::removeComponent

(

SkyComponent *const

comp

)

Remove a sub component from the composite comp Pointer to the SkyComponent to be removed.

Definition at line 33 of file skycomposite.cpp.

update()

void SkyComposite::update ( KSNumbers * num = nullptr )

overridevirtual

Delegate update-position requests to all sub components.

This function usually just updates the Horizontal (Azimuth/Altitude) coordinates. However, the precession and nutation must also be recomputed periodically. Requests to do so are sent through the doPrecess parameter. num Pointer to the KSNumbers object

See also

updatePlanets()

updateMoons()

Note

By default, the num parameter is nullptr, indicating that Precession/Nutation computation should be skipped; this computation is only occasionally required.

Reimplemented from SkyComponent.

Reimplemented in SolarSystemComposite, and SkyMapComposite.

Definition at line 58 of file skycomposite.cpp.

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

• skycomposite.h
• skycomposite.cpp