Contains settings and properties relating to how a QgsProject should be displayed inside map canvas, e.g. More...

#include <qgsprojectviewsettings.h>

Inheritance diagram for QgsProjectViewSettings:

Signals
void	mapScalesChanged ()
	Emitted when the list of custom project map scales changes. More...

void	presetFullExtentChanged ()
	Emitted whenever the presetFullExtent() is changed. More...

Public Member Functions
	QgsProjectViewSettings (QgsProject *project=nullptr)
	Constructor for QgsProjectViewSettings for the specified project. More...

QgsReferencedRectangle	defaultViewExtent () const
	Returns the default view extent, which should be used as the initial map extent when this project is opened. More...

QgsReferencedRectangle	fullExtent () const
	Returns the full extent of the project, which represents the maximal limits of the project. More...

QVector< double >	mapScales () const
	Returns the list of custom project map scales. More...

QgsReferencedRectangle	presetFullExtent () const
	Returns the project's preset full extent. More...

bool	readXml (const QDomElement &element, const QgsReadWriteContext &context)
	Reads the settings's state from a DOM element. More...

void	reset ()
	Resets the settings to a default state. More...

void	setDefaultViewExtent (const QgsReferencedRectangle &extent)
	Sets the default view extent, which should be used as the initial map extent when this project is opened. More...

void	setMapScales (const QVector< double > &scales)
	Sets the list of custom project map scales. More...

void	setPresetFullExtent (const QgsReferencedRectangle &extent)
	Sets the project's preset full extent. More...

void	setUseProjectScales (bool enabled)
	Sets whether project mapScales() are enabled. More...

bool	useProjectScales () const
	Returns `true` if project mapScales() are enabled. More...

QDomElement	writeXml (QDomDocument &doc, const QgsReadWriteContext &context) const
	Returns a DOM element representing the settings. More...

Detailed Description

Contains settings and properties relating to how a QgsProject should be displayed inside map canvas, e.g.

map scales and default view extent for the project.

Since: QGIS 3.10.1

Definition at line 35 of file qgsprojectviewsettings.h.

Constructor & Destructor Documentation

◆ QgsProjectViewSettings()

QgsProjectViewSettings::QgsProjectViewSettings ( QgsProject * project = nullptr )

Constructor for QgsProjectViewSettings for the specified project.

Ownership is transferred to the project.

Definition at line 23 of file qgsprojectviewsettings.cpp.

Member Function Documentation

◆ defaultViewExtent()

QgsReferencedRectangle QgsProjectViewSettings::defaultViewExtent ( ) const

Returns the default view extent, which should be used as the initial map extent when this project is opened.

Warning: When a project is opened in the QGIS desktop application and saved, individual map canvases will store their own previous view extent as custom project properties. Reloading this saved version of the project will trigger the canvases to restore their individual last view extents. Accordingly, in the QGIS desktop application, this setting only forms a default, initial view used when the project is opened for the very first time.

See also: setDefaultViewExtent()

Definition at line 47 of file qgsprojectviewsettings.cpp.

◆ fullExtent()

QgsReferencedRectangle QgsProjectViewSettings::fullExtent ( ) const

Returns the full extent of the project, which represents the maximal limits of the project.

The returned extent will be in the project's CRS.

If the presetFullExtent() is non null, this will be returned as the full extent. Otherwise the full extent will be calculated based on the extent of all layers in the project.

See also: presetFullExtent(); setPresetFullExtent()

Definition at line 71 of file qgsprojectviewsettings.cpp.

◆ mapScales()

QVector< double > QgsProjectViewSettings::mapScales ( ) const

Returns the list of custom project map scales.

The scales list consists of a list of scale denominator values, e.g. 1000 for a 1:1000 scale.

See also: setMapScales(); mapScalesChanged()

Definition at line 103 of file qgsprojectviewsettings.cpp.

◆ mapScalesChanged

void QgsProjectViewSettings::mapScalesChanged ( )

signal

Emitted when the list of custom project map scales changes.

See also: mapScales(); setMapScales()

◆ presetFullExtent()

QgsReferencedRectangle QgsProjectViewSettings::presetFullExtent ( ) const

Returns the project's preset full extent.

This extent represents the maximal limits of the project. The full extent defaults to a null rectangle, which indicates that the maximal extent should be calculated based on the layers in the project.

See also: setPresetFullExtent(); fullExtent()

Since: QGIS 3.18

Definition at line 57 of file qgsprojectviewsettings.cpp.

◆ presetFullExtentChanged

void QgsProjectViewSettings::presetFullExtentChanged ( )

signal

Emitted whenever the presetFullExtent() is changed.

Since: QGIS 3.18

◆ readXml()

bool QgsProjectViewSettings::readXml	(	const QDomElement &	element,
		const QgsReadWriteContext &	context
	)

Reads the settings's state from a DOM element.

See also: writeXml()

Definition at line 122 of file qgsprojectviewsettings.cpp.

◆ reset()

void QgsProjectViewSettings::reset ( )

Resets the settings to a default state.

Definition at line 30 of file qgsprojectviewsettings.cpp.

◆ setDefaultViewExtent()

void QgsProjectViewSettings::setDefaultViewExtent ( const QgsReferencedRectangle & extent )

Sets the default view extent, which should be used as the initial map extent when this project is opened.

Warning: When a project is opened in the QGIS desktop application and saved, individual map canvases will store their own previous view extent as custom project properties. Reloading this saved version of the project will trigger the canvases to restore their individual last view extents. Accordingly, in the QGIS desktop application, this setting only forms a default, initial view used when the project is opened for the very first time.

See also: defaultViewExtent()

Definition at line 52 of file qgsprojectviewsettings.cpp.

◆ setMapScales()

void QgsProjectViewSettings::setMapScales ( const QVector< double > & scales )

Sets the list of custom project map scales.

The scales list consists of a list of scale denominator values, e.g. 1000 for a 1:1000 scale.

See also: mapScales(); mapScalesChanged()

Definition at line 89 of file qgsprojectviewsettings.cpp.

◆ setPresetFullExtent()

void QgsProjectViewSettings::setPresetFullExtent ( const QgsReferencedRectangle & extent )

Sets the project's preset full extent.

This extent represents the maximal limits of the project. Setting the full extent to a null rectangle indicates that the maximal extent should be calculated based on the layers in the project.