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QgsAtlasComposition Class Reference

Class used to render an Atlas, iterating over geometry features. More...

#include <qgsatlascomposition.h>

Inheritance diagram for QgsAtlasComposition:
Inheritance graph
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Public Types

typedef QMap< QgsFeatureId,
QVariant > 
SorterKeys
 

Public Slots

void firstFeature ()
 
void lastFeature ()
 
void nextFeature ()
 
void prevFeature ()
 
void refreshFeature ()
 Refreshes the current atlas feature, by refetching its attributes from the vector layer provider. More...
 

Signals

void coverageLayerChanged (QgsVectorLayer *layer)
 Is emitted when the coverage layer for an atlas changes. More...
 
void featureChanged (QgsFeature *feature)
 Is emitted when the current atlas feature changes. More...
 
void parameterChanged ()
 emitted when one of the parameters changes More...
 
void renderBegun ()
 Is emitted when atlas rendering has begun. More...
 
void renderEnded ()
 Is emitted when atlas rendering has ended. More...
 
void statusMsgChanged (QString message)
 Is emitted when the atlas has an updated status bar message for the composer window. More...
 
void toggled (bool)
 emitted when atlas is enabled or disabled More...
 

Public Member Functions

 QgsAtlasComposition (QgsComposition *composition)
 
 ~QgsAtlasComposition ()
 
bool beginRender ()
 Begins the rendering. More...
 
Q_DECL_DEPRECATED QgsComposerMapcomposerMap () const
 Returns the map used by the atlas. More...
 
QgsCompositioncomposition ()
 
QgsVectorLayercoverageLayer () const
 Returns the coverage layer used for the atlas features. More...
 
QgsFeaturecurrentFeature ()
 Returns the current atlas feature. More...
 
const QString & currentFilename () const
 Returns the current filename. More...
 
bool enabled () const
 Returns whether the atlas generation is enabled. More...
 
void endRender ()
 Ends the rendering. More...
 
QString featureFilter () const
 
QString featureFilterErrorString () const
 Returns an error string from parsing the feature filter expression. More...
 
QString filenamePattern () const
 Returns the filename expression used for generating output filenames for each atlas page. More...
 
QString filenamePatternErrorString () const
 Returns an error string from parsing the filename expression. More...
 
bool filterFeatures () const
 
Q_DECL_DEPRECATED bool fixedScale () const
 Returns whether the atlas map uses a fixed scale. More...
 
bool hideCoverage () const
 Returns true if the atlas is set to hide the coverage layer. More...
 
Q_DECL_DEPRECATED float margin () const
 Returns the margin for the atlas map. More...
 
int numFeatures () const
 Returns the number of features in the coverage layer. More...
 
const QVector< qreal > & predefinedScales () const
 Returns the current list of predefined scales for the atlas. More...
 
bool prepareForFeature (const int i, const bool updateMaps=true)
 Prepare the atlas map for the given feature. More...
 
bool prepareForFeature (const QgsFeature *feat)
 Prepare the atlas map for the given feature. More...
 
void prepareMap (QgsComposerMap *map)
 Recalculates the bounds of an atlas driven map. More...
 
void readXML (const QDomElement &elem, const QDomDocument &doc)
 Reads general atlas settings from xml. More...
 
void readXMLMapSettings (const QDomElement &elem, const QDomDocument &doc)
 Reads old (pre 2.2) map related atlas settings from xml. More...
 
Q_DECL_DEPRECATED void setComposerMap (QgsComposerMap *map)
 Sets the map used by the atlas. More...
 
void setCoverageLayer (QgsVectorLayer *layer)
 Sets the coverage layer to use for the atlas features. More...
 
void setEnabled (bool enabled)
 Sets whether the atlas is enabled. More...
 
void setFeatureFilter (const QString &expression)
 
bool setFilenamePattern (const QString &pattern)
 Sets the filename expression used for generating output filenames for each atlas page. More...
 
void setFilterFeatures (bool doFilter)
 
Q_DECL_DEPRECATED void setFixedScale (bool fixed)
 Sets whether the atlas map should use a fixed scale. More...
 
void setHideCoverage (bool hide)
 Sets whether the coverage layer should be hidden in map items in the composition. More...
 
Q_DECL_DEPRECATED void setMargin (float margin)
 Sets the margin for the atlas map. More...
 
void setPredefinedScales (const QVector< qreal > &scales)
 Sets the list of predefined scales for the atlas. More...
 
void setSingleFile (bool single)
 Sets whether the atlas should be exported to a single file. More...
 
void setSortAscending (bool ascending)
 
void setSortFeatures (bool doSort)
 
Q_DECL_DEPRECATED void setSortKeyAttributeIndex (int idx)
 
void setSortKeyAttributeName (QString fieldName)
 
bool singleFile () const
 Returns whether the atlas will be exported to a single file. More...
 
bool sortAscending () const
 
bool sortFeatures () const
 
Q_DECL_DEPRECATED int sortKeyAttributeIndex () const
 
QString sortKeyAttributeName () const
 
int updateFeatures ()
 Requeries the current atlas coverage layer and applies filtering and sorting. More...
 
void writeXML (QDomElement &elem, QDomDocument &doc) const
 

Detailed Description

Class used to render an Atlas, iterating over geometry features.

prepareForFeature() modifies the atlas map's extent to zoom on the given feature. This class is used for printing, exporting to PDF and images.

Note
This class should not be created directly. For the atlas to function correctly the atlasComposition() property for QgsComposition should be used to retrieve a QgsAtlasComposition which is automatically created and attached to the composition.

Definition at line 41 of file qgsatlascomposition.h.

Member Typedef Documentation

typedef QMap< QgsFeatureId, QVariant > QgsAtlasComposition::SorterKeys

Definition at line 316 of file qgsatlascomposition.h.

Constructor & Destructor Documentation

QgsAtlasComposition::QgsAtlasComposition ( QgsComposition composition)

Definition at line 31 of file qgsatlascomposition.cpp.

QgsAtlasComposition::~QgsAtlasComposition ( )

Definition at line 55 of file qgsatlascomposition.cpp.

Member Function Documentation

bool QgsAtlasComposition::beginRender ( )

Begins the rendering.

Returns true if successful, false if no matching atlas features found.

Definition at line 278 of file qgsatlascomposition.cpp.

QgsComposerMap * QgsAtlasComposition::composerMap ( ) const

Returns the map used by the atlas.

Deprecated:
Use QgsComposerMap::atlasDriven() instead

Definition at line 116 of file qgsatlascomposition.cpp.

QgsComposition* QgsAtlasComposition::composition ( )
inline

Definition at line 240 of file qgsatlascomposition.h.

QgsVectorLayer* QgsAtlasComposition::coverageLayer ( ) const
inline

Returns the coverage layer used for the atlas features.

Returns
atlas coverage layer
See also
setCoverageLayer

Definition at line 132 of file qgsatlascomposition.h.

void QgsAtlasComposition::coverageLayerChanged ( QgsVectorLayer layer)
signal

Is emitted when the coverage layer for an atlas changes.

QgsFeature* QgsAtlasComposition::currentFeature ( )
inline

Returns the current atlas feature.

Must be called after prepareForFeature( i ).

Definition at line 247 of file qgsatlascomposition.h.

const QString & QgsAtlasComposition::currentFilename ( ) const

Returns the current filename.

Must be called after prepareForFeature( i )

Definition at line 626 of file qgsatlascomposition.cpp.

bool QgsAtlasComposition::enabled ( ) const
inline

Returns whether the atlas generation is enabled.

Returns
true if atlas is enabled
See also
setEnabled

Definition at line 52 of file qgsatlascomposition.h.

void QgsAtlasComposition::endRender ( )

Ends the rendering.

Restores original extent

Definition at line 301 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::featureChanged ( QgsFeature feature)
signal

Is emitted when the current atlas feature changes.

QString QgsAtlasComposition::featureFilter ( ) const
inline

Definition at line 165 of file qgsatlascomposition.h.

QString QgsAtlasComposition::featureFilterErrorString ( ) const
inline

Returns an error string from parsing the feature filter expression.

Returns
filename pattern parser error
See also
setFilenamePattern
filenamePattern

Definition at line 173 of file qgsatlascomposition.h.

QString QgsAtlasComposition::filenamePattern ( ) const
inline

Returns the filename expression used for generating output filenames for each atlas page.

Returns
filename pattern
See also
setFilenamePattern
filenamePatternErrorString
Note
This property has no effect when exporting to PDF if singleFile() is true

Definition at line 109 of file qgsatlascomposition.h.

QString QgsAtlasComposition::filenamePatternErrorString ( ) const
inline

Returns an error string from parsing the filename expression.

Returns
filename pattern parser error
See also
setFilenamePattern
filenamePattern

Definition at line 126 of file qgsatlascomposition.h.

bool QgsAtlasComposition::filterFeatures ( ) const
inline

Definition at line 162 of file qgsatlascomposition.h.

void QgsAtlasComposition::firstFeature ( )
slot

Definition at line 359 of file qgsatlascomposition.cpp.

Q_NOWARN_DEPRECATED_PUSH bool QgsAtlasComposition::fixedScale ( ) const

Returns whether the atlas map uses a fixed scale.

Deprecated:
since 2.4 Use QgsComposerMap::atlasScalingMode() instead

Definition at line 833 of file qgsatlascomposition.cpp.

bool QgsAtlasComposition::hideCoverage ( ) const
inline

Returns true if the atlas is set to hide the coverage layer.

Returns
true if coverage layer is hidden
See also
setHideCoverage

Definition at line 74 of file qgsatlascomposition.h.

void QgsAtlasComposition::lastFeature ( )
slot

Definition at line 364 of file qgsatlascomposition.cpp.

float QgsAtlasComposition::margin ( ) const

Returns the margin for the atlas map.

Deprecated:
Use QgsComposerMap::atlasMargin() instead

Definition at line 857 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::nextFeature ( )
slot

Definition at line 337 of file qgsatlascomposition.cpp.

int QgsAtlasComposition::numFeatures ( ) const

Returns the number of features in the coverage layer.

Definition at line 332 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::parameterChanged ( )
signal

emitted when one of the parameters changes

const QVector<qreal>& QgsAtlasComposition::predefinedScales ( ) const
inline

Returns the current list of predefined scales for the atlas.

This is used for maps which are set to the predefined atlas scaling mode.

Returns
a vector of doubles representing predefined scales
See also
setPredefinedScales
QgsComposerMap::atlasScalingMode

Definition at line 187 of file qgsatlascomposition.h.

bool QgsAtlasComposition::prepareForFeature ( const int  i,
const bool  updateMaps = true 
)

Prepare the atlas map for the given feature.

Sets the extent and context variables

Parameters
ifeature number
updateMapsset to true to redraw maps and recalculate their extent
Returns
true if feature was successfully prepared

Definition at line 386 of file qgsatlascomposition.cpp.

bool QgsAtlasComposition::prepareForFeature ( const QgsFeature feat)

Prepare the atlas map for the given feature.

Sets the extent and context variables

Returns
true if feature was successfully prepared

Definition at line 369 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::prepareMap ( QgsComposerMap map)

Recalculates the bounds of an atlas driven map.

Definition at line 498 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::prevFeature ( )
slot

Definition at line 348 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::readXML ( const QDomElement &  elem,
const QDomDocument &  doc 
)

Reads general atlas settings from xml.

Parameters
elema QDomElement holding the atlas properties.
docQDomDocument for the source xml.
See also
readXMLMapSettings
Note
This method should be called before restoring composer item properties

Definition at line 668 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::readXMLMapSettings ( const QDomElement &  elem,
const QDomDocument &  doc 
)

Reads old (pre 2.2) map related atlas settings from xml.

Parameters
elema QDomElement holding the atlas map properties.
docQDomDocument for the source xml.
See also
readXMLMapSettings
Note
This method should be called after restoring composer item properties
added in version 2.5

Definition at line 723 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::refreshFeature ( )
slot

Refreshes the current atlas feature, by refetching its attributes from the vector layer provider.

Note
added in QGIS 2.5

Definition at line 381 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::renderBegun ( )
signal

Is emitted when atlas rendering has begun.

void QgsAtlasComposition::renderEnded ( )
signal

Is emitted when atlas rendering has ended.

void QgsAtlasComposition::setComposerMap ( QgsComposerMap map)

Sets the map used by the atlas.

Deprecated:
Use QgsComposerMap::setAtlasDriven( true ) instead

Definition at line 135 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::setCoverageLayer ( QgsVectorLayer layer)

Sets the coverage layer to use for the atlas features.

Parameters
layervector coverage layer
See also
coverageLayer

Definition at line 91 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::setEnabled ( bool  enabled)

Sets whether the atlas is enabled.

Parameters
enabledset to true to enable to atlas
See also
enabled

Definition at line 59 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::setFeatureFilter ( const QString &  expression)
inline

Definition at line 166 of file qgsatlascomposition.h.

bool QgsAtlasComposition::setFilenamePattern ( const QString &  pattern)

Sets the filename expression used for generating output filenames for each atlas page.

Returns
true if filename expression could be successful set, false if expression is invalid
Parameters
patternexpression to use for output filenames
See also
filenamePattern
filenamePatternErrorString
Note
This method has no effect when exporting to PDF if singleFile() is true

Definition at line 770 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::setFilterFeatures ( bool  doFilter)
inline

Definition at line 163 of file qgsatlascomposition.h.

void QgsAtlasComposition::setFixedScale ( bool  fixed)

Sets whether the atlas map should use a fixed scale.

Deprecated:
since 2.4 Use QgsComposerMap::setAtlasScalingMode() instead

Definition at line 845 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::setHideCoverage ( bool  hide)

Sets whether the coverage layer should be hidden in map items in the composition.

Parameters
hideset to true to hide the coverage layer
See also
hideCoverage

Definition at line 757 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::setMargin ( float  margin)

Sets the margin for the atlas map.

Deprecated:
Use QgsComposerMap::setAtlasMargin( double ) instead

Definition at line 869 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::setPredefinedScales ( const QVector< qreal > &  scales)

Sets the list of predefined scales for the atlas.

This is used for maps which are set to the predefined atlas scaling mode.

Parameters
scalesa vector of doubles representing predefined scales
See also
predefinedScales
QgsComposerMap::atlasScalingMode

Definition at line 825 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::setSingleFile ( bool  single)
inline

Sets whether the atlas should be exported to a single file.

This is only applicable for PDF exports.

Parameters
singleset to true to export atlas to a single file.
See also
singleFile
Note
This method is only used for PDF exports.

Definition at line 154 of file qgsatlascomposition.h.

void QgsAtlasComposition::setSortAscending ( bool  ascending)
inline

Definition at line 160 of file qgsatlascomposition.h.

void QgsAtlasComposition::setSortFeatures ( bool  doSort)
inline

Definition at line 157 of file qgsatlascomposition.h.

void QgsAtlasComposition::setSortKeyAttributeIndex ( int  idx)

Definition at line 157 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::setSortKeyAttributeName ( QString  fieldName)
inline

Definition at line 176 of file qgsatlascomposition.h.

bool QgsAtlasComposition::singleFile ( ) const
inline

Returns whether the atlas will be exported to a single file.

This is only applicable for PDF exports.

Returns
true if atlas will be exported to a single file
See also
setSingleFile
Note
This property is only used for PDF exports.

Definition at line 146 of file qgsatlascomposition.h.

bool QgsAtlasComposition::sortAscending ( ) const
inline

Definition at line 159 of file qgsatlascomposition.h.

bool QgsAtlasComposition::sortFeatures ( ) const
inline

Definition at line 156 of file qgsatlascomposition.h.

int QgsAtlasComposition::sortKeyAttributeIndex ( ) const

Definition at line 148 of file qgsatlascomposition.cpp.

QString QgsAtlasComposition::sortKeyAttributeName ( ) const
inline

Definition at line 175 of file qgsatlascomposition.h.

void QgsAtlasComposition::statusMsgChanged ( QString  message)
signal

Is emitted when the atlas has an updated status bar message for the composer window.

void QgsAtlasComposition::toggled ( bool  )
signal

emitted when atlas is enabled or disabled

int QgsAtlasComposition::updateFeatures ( )

Requeries the current atlas coverage layer and applies filtering and sorting.

Returns number of matching features. Must be called after prepareForFeature( i )

Definition at line 202 of file qgsatlascomposition.cpp.

void QgsAtlasComposition::writeXML ( QDomElement &  elem,
QDomDocument &  doc 
) const

Definition at line 631 of file qgsatlascomposition.cpp.


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