Registry of color schemes. More...

#include <qgscolorschemeregistry.h>

Public Member Functions
	QgsColorSchemeRegistry ()=default
	Constructor for an empty color scheme registry. More...

virtual	~QgsColorSchemeRegistry ()

void	addColorScheme (QgsColorScheme *scheme)
	Adds a color scheme to the registry. More...

void	addDefaultSchemes ()
	Adds all default color schemes to this color scheme. More...

void	addUserSchemes ()
	Creates schemes for all gpl palettes in the user's palettes folder. More...

QColor	fetchRandomStyleColor () const
	Returns a random color for use with a new symbol style (e.g. More...

void	initStyleScheme ()
	Initializes the default random style color scheme for the user. More...

void	populateFromInstance ()
	Adds all color schemes from the global instance to this color scheme. More...

QgsColorScheme *	randomStyleColorScheme ()
	Returns the color scheme used when fetching random colors to use for symbol styles. More...

bool	removeColorScheme (QgsColorScheme *scheme)
	Removes all matching color schemes from the registry. More...

QList< QgsColorScheme * >	schemes () const
	Returns all color schemes in the registry. More...

QList< QgsColorScheme * >	schemes (QgsColorScheme::SchemeFlag flag) const
	Returns all color schemes in the registry which have a specified flag set. More...

template<class T >
void	schemes (QList< T *> &schemeList)
	Returns color schemes of a specific type. More...

void	setRandomStyleColorScheme (QgsColorScheme *scheme)
	Sets the color scheme to use when fetching random colors to use for symbol styles. More...

Detailed Description

Registry of color schemes.

A registry of QgsColorScheme color schemes. This class can be created directly, or accessed via a QgsApplication::colorSchemeRegistry().

Since: QGIS 2.5

Definition at line 34 of file qgscolorschemeregistry.h.

Constructor & Destructor Documentation

◆ QgsColorSchemeRegistry()

QgsColorSchemeRegistry::QgsColorSchemeRegistry ( )

default

Constructor for an empty color scheme registry.

◆ ~QgsColorSchemeRegistry()

QgsColorSchemeRegistry::~QgsColorSchemeRegistry ( )

virtual

Definition at line 26 of file qgscolorschemeregistry.cpp.

Member Function Documentation

◆ addColorScheme()

void QgsColorSchemeRegistry::addColorScheme ( QgsColorScheme * scheme )

Adds a color scheme to the registry.

Ownership of the scheme is transferred to the registry.

Parameters

scheme color scheme to add

See also: populateFromInstance; removeColorScheme

Definition at line 83 of file qgscolorschemeregistry.cpp.

◆ addDefaultSchemes()

void QgsColorSchemeRegistry::addDefaultSchemes ( )

Adds all default color schemes to this color scheme.

See also: populateFromInstance; addColorScheme; addUserSchemes

Definition at line 45 of file qgscolorschemeregistry.cpp.

◆ addUserSchemes()

void QgsColorSchemeRegistry::addUserSchemes ( )

Creates schemes for all gpl palettes in the user's palettes folder.

See also: populateFromInstance; addDefaultSchemes; addColorScheme

Definition at line 65 of file qgscolorschemeregistry.cpp.

◆ fetchRandomStyleColor()

QColor QgsColorSchemeRegistry::fetchRandomStyleColor ( ) const

Returns a random color for use with a new symbol style (e.g.

for a newly created map layer).

If a randomStyleColorScheme() is set then this color will be randomly taken from that color scheme. If no randomStyleColorScheme() is set then a totally random color will be generated.

Note that calling setRandomStyleColorScheme() takes a snapshot of the colors from the scheme's QgsColorScheme::fetchColors() list. Accordingly, any future changes to the colors in the scheme are not automatically reflected by calls to fetchRandomStyleColor(). If the scheme is updated, then another call to setRandomStyleColorScheme() must be made in order to update the cached list of available style colors from which fetchRandomStyleColor() selects colors.

This method is thread safe.

See also: randomStyleColorScheme(); setRandomStyleColorScheme()

Since: QGIS 3.2

Definition at line 141 of file qgscolorschemeregistry.cpp.

◆ initStyleScheme()

void QgsColorSchemeRegistry::initStyleScheme ( )

Initializes the default random style color scheme for the user.

Since: QGIS 3.2

Definition at line 54 of file qgscolorschemeregistry.cpp.

◆ populateFromInstance()

void QgsColorSchemeRegistry::populateFromInstance ( )

Adds all color schemes from the global instance to this color scheme.

See also: addDefaultSchemes; addColorScheme

Definition at line 32 of file qgscolorschemeregistry.cpp.

◆ randomStyleColorScheme()

QgsColorScheme * QgsColorSchemeRegistry::randomStyleColorScheme ( )

Returns the color scheme used when fetching random colors to use for symbol styles.

This may be nullptr, in which case totally random colors are used for styles.

See also: setRandomStyleColorScheme(); fetchRandomStyleColor()

Since: QGIS 3.2

Definition at line 136 of file qgscolorschemeregistry.cpp.

◆ removeColorScheme()

bool QgsColorSchemeRegistry::removeColorScheme ( QgsColorScheme * scheme )

Removes all matching color schemes from the registry.

Parameters

scheme color scheme to remove

Returns: true if scheme was found and removed

See also: addColorScheme

Definition at line 169 of file qgscolorschemeregistry.cpp.

◆ schemes() [1/3]

QList< QgsColorScheme * > QgsColorSchemeRegistry::schemes ( ) const

Returns all color schemes in the registry.

Returns: list of color schemes

Definition at line 88 of file qgscolorschemeregistry.cpp.

◆ schemes() [2/3]

QList< QgsColorScheme * > QgsColorSchemeRegistry::schemes ( QgsColorScheme::SchemeFlag flag ) const

Returns all color schemes in the registry which have a specified flag set.

Parameters

flag	flag to match

Returns: list of color schemes with flag set

Definition at line 99 of file qgscolorschemeregistry.cpp.

◆ schemes() [3/3]

template<class T >

void QgsColorSchemeRegistry::schemes ( QList< T *> & schemeList )

inline

Returns color schemes of a specific type.

Parameters

schemeList destination list for matching schemes

Note: not available in Python bindings

Definition at line 112 of file qgscolorschemeregistry.h.

◆ setRandomStyleColorScheme()

void QgsColorSchemeRegistry::setRandomStyleColorScheme ( QgsColorScheme * scheme )

Sets the color scheme to use when fetching random colors to use for symbol styles.

scheme should match a color scheme which is already present in the registry.

Note that calling this method takes a snapshot of the colors from the scheme's QgsColorScheme::fetchColors() list. Accordingly, any future changes to the colors in scheme are not automatically reflected by calls to fetchRandomStyleColor(). If scheme is updated, then another call to setRandomStyleColorScheme() must be made in order to update the cached list of available style colors.

See also: randomStyleColorScheme(); fetchRandomStyleColor()

Since: QGIS 3.2

Definition at line 113 of file qgscolorschemeregistry.cpp.

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

/tmp/buildd/qgis-3.8.0+99unstable/src/core/qgscolorschemeregistry.h
/tmp/buildd/qgis-3.8.0+99unstable/src/core/qgscolorschemeregistry.cpp

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ QgsColorSchemeRegistry()

◆ ~QgsColorSchemeRegistry()

Member Function Documentation

◆ addColorScheme()

◆ addDefaultSchemes()

◆ addUserSchemes()

◆ fetchRandomStyleColor()

◆ initStyleScheme()

◆ populateFromInstance()

◆ randomStyleColorScheme()

◆ removeColorScheme()

◆ schemes() [1/3]

◆ schemes() [2/3]

◆ schemes() [3/3]

◆ setRandomStyleColorScheme()