QgsLayoutSerializableObject Class Reference

An interface for layout objects which can be stored and read from DOM elements. More...

#include <qgslayoutserializableobject.h>

Inheritance diagram for QgsLayoutSerializableObject:

Public Member Functions
QgsAbstractLayoutUndoCommand *	createCommand (const QString &text, int id, QUndoCommand *parent=nullptr) override
	Creates a new layout undo command with the specified text and parent. More...
virtual QgsLayout *	layout ()=0
	Returns the layout the object belongs to. More...
virtual bool	readXml (const QDomElement &element, const QDomDocument &document, const QgsReadWriteContext &context)=0
	Sets the objects's state from a DOM element. More...
virtual QString	stringType () const =0
	Returns the object type as a string. More...
virtual bool	writeXml (QDomElement &parentElement, QDomDocument &document, const QgsReadWriteContext &context) const =0
	Stores the objects's state in a DOM element. More...
Public Member Functions inherited from QgsLayoutUndoObjectInterface
virtual	~QgsLayoutUndoObjectInterface ()=default
	Destructor for QgsLayoutUndoObjectInterface. More...

Friends
class	QgsLayoutSerializableObjectUndoCommand

Detailed Description

An interface for layout objects which can be stored and read from DOM elements.

Since

QGIS 3.0

Definition at line 35 of file qgslayoutserializableobject.h.

Member Function Documentation

createCommand()

QgsAbstractLayoutUndoCommand * QgsLayoutSerializableObject::createCommand ( const QString &  text, int  id, QUndoCommand *  parent = nullptr  )

overridevirtual

Creates a new layout undo command with the specified text and parent.

The id argument can be used to specify an id number for the source event - this is used to determine whether QUndoCommand command compression can apply to the command.

Implements QgsLayoutUndoObjectInterface.

Definition at line 78 of file qgslayoutserializableobject.cpp.

layout()

virtual QgsLayout* QgsLayoutSerializableObject::layout ( )

pure virtual

Returns the layout the object belongs to.

Implemented in QgsLayoutGuideCollection, QgsLayoutPageCollection, QgsLayoutGridSettings, QgsLayoutAtlas, and QgsLayoutSnapper.

readXml()

virtual bool QgsLayoutSerializableObject::readXml ( const QDomElement &  element, const QDomDocument &  document, const QgsReadWriteContext &  context  )

pure virtual

Sets the objects's state from a DOM element.

element is the DOM node corresponding to the object.

See also

writeXml()

Implemented in QgsLayoutPageCollection, QgsLayoutGuideCollection, QgsLayoutSnapper, QgsLayoutGridSettings, and QgsLayoutAtlas.

stringType()

virtual QString QgsLayoutSerializableObject::stringType ( ) const

pure virtual

Returns the object type as a string.

This string must be a unique, single word, character only representation of the item type, eg "LayoutScaleBar"

Implemented in QgsLayoutGuideCollection, QgsLayoutPageCollection, QgsLayoutGridSettings, QgsLayoutAtlas, and QgsLayoutSnapper.

writeXml()

virtual bool QgsLayoutSerializableObject::writeXml ( QDomElement &  parentElement, QDomDocument &  document, const QgsReadWriteContext &  context  ) const

pure virtual

Stores the objects's state in a DOM element.

The parentElement should refer to the parent layout's DOM element.

See also

readXml()

Implemented in QgsLayoutPageCollection, QgsLayoutGuideCollection, QgsLayoutSnapper, QgsLayoutGridSettings, and QgsLayoutAtlas.

Friends And Related Function Documentation

QgsLayoutSerializableObjectUndoCommand

friend class QgsLayoutSerializableObjectUndoCommand

friend

Definition at line 67 of file qgslayoutserializableobject.h.

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

• /tmp/buildd/qgis-3.8.0+99unstable/src/core/layout/qgslayoutserializableobject.h
• /tmp/buildd/qgis-3.8.0+99unstable/src/core/layout/qgslayoutserializableobject.cpp