The edit buffer group manages a group of edit buffers. More...

#include <qgsvectorlayereditbuffergroup.h>

Inheritance diagram for QgsVectorLayerEditBufferGroup:

Public Member Functions
	QgsVectorLayerEditBufferGroup (QObject *parent=nullptr)
	Constructor for QgsEditBufferGroup.

void	addLayer (QgsVectorLayer *layer)
	Add a layer to this edit buffer group.

void	clear ()
	Remove all layers from this edit buffer group.

bool	commitChanges (QStringList &commitErrors, bool stopEditing=true)
	Attempts to commit any changes to disk.

bool	isEditing () const
	Returns `true` if the layers are in editing mode.

QSet< QgsVectorLayer * >	layers () const
	Gets the set of layers currently managed by this edit buffer group.

QSet< QgsVectorLayer * >	modifiedLayers () const
	Gets the set of modified layers currently managed by this edit buffer group.

bool	rollBack (QStringList &rollbackErrors, bool stopEditing=true)
	Stop editing and discard the edits.

bool	startEditing ()
	Start editing.

Detailed Description

The edit buffer group manages a group of edit buffers.

Commands like commit and rollback are managed by the group invokes individual addFeature(), deleteFeature(), ... in the correct order across all contained edit buffers.

Since: QGIS 3.26

Definition at line 40 of file qgsvectorlayereditbuffergroup.h.

Constructor & Destructor Documentation

◆ QgsVectorLayerEditBufferGroup()

QgsVectorLayerEditBufferGroup::QgsVectorLayerEditBufferGroup ( QObject * parent = nullptr )

explicit

Constructor for QgsEditBufferGroup.

Definition at line 26 of file qgsvectorlayereditbuffergroup.cpp.

Member Function Documentation

◆ addLayer()

void QgsVectorLayerEditBufferGroup::addLayer ( QgsVectorLayer * layer )

Add a layer to this edit buffer group.

Definition at line 32 of file qgsvectorlayereditbuffergroup.cpp.

◆ clear()

void QgsVectorLayerEditBufferGroup::clear ( )

Remove all layers from this edit buffer group.

Definition at line 37 of file qgsvectorlayereditbuffergroup.cpp.

◆ commitChanges()

bool QgsVectorLayerEditBufferGroup::commitChanges	(	QStringList &	commitErrors,
		bool	stopEditing = `true`
	)

Attempts to commit any changes to disk.

Returns the result of the attempt. If a commit fails, the in-memory changes are left alone.

This allows editing to continue if the commit failed on e.g. a disallowed value in a Postgres database - the user can re-edit and try again.

The commits occur in distinct stages, (add attributes, add features, change attribute values, change geometries, delete features, delete attributes) so if a stage fails, it's difficult to roll back cleanly. Therefore any error message also includes which stage failed so that the user has some chance of repairing the damage cleanly.

Parameters

commitErrors	will be set to a list of descriptive errors if the commit fails.
stopEditing	if set to `false`, the layer will stay in editing mode. Otherwise the layer editing mode will be disabled if the commit is successful.

Returns: true on success

Definition at line 115 of file qgsvectorlayereditbuffergroup.cpp.

◆ isEditing()

bool QgsVectorLayerEditBufferGroup::isEditing ( ) const

Returns true if the layers are in editing mode.

Definition at line 385 of file qgsvectorlayereditbuffergroup.cpp.

◆ layers()

QSet< QgsVectorLayer * > QgsVectorLayerEditBufferGroup::layers ( ) const

Gets the set of layers currently managed by this edit buffer group.

Returns: Layer set

Definition at line 42 of file qgsvectorlayereditbuffergroup.cpp.

◆ modifiedLayers()

QSet< QgsVectorLayer * > QgsVectorLayerEditBufferGroup::modifiedLayers ( ) const

Gets the set of modified layers currently managed by this edit buffer group.

Returns: Layer set

Definition at line 47 of file qgsvectorlayereditbuffergroup.cpp.

◆ rollBack()

bool QgsVectorLayerEditBufferGroup::rollBack	(	QStringList &	rollbackErrors,
		bool	stopEditing = `true`
	)

Stop editing and discard the edits.

Parameters

rollbackErrors	will be set to a list of descriptive errors if the rollback fails.
stopEditing	if set to `false`, the layer will stay in editing mode. Otherwise the layer editing mode will be disabled if the rollback is successful.

Returns: false if errors occurred during rollback

Definition at line 333 of file qgsvectorlayereditbuffergroup.cpp.

◆ startEditing()

bool QgsVectorLayerEditBufferGroup::startEditing ( )

Start editing.

Returns: true on success

Definition at line 58 of file qgsvectorlayereditbuffergroup.cpp.

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

/build/qgis-3.40.0+99sid/src/core/vector/qgsvectorlayereditbuffergroup.h
/build/qgis-3.40.0+99sid/src/core/vector/qgsvectorlayereditbuffergroup.cpp

Public Member Functions