AddDiagramCommand Class Reference

The AddDiagramCommand class Undo/redo support for adding a new folio (diagram) to a project. Takes ownership of the (already constructed, not yet inserted) diagram: redo() inserts it into the project, undo() detaches it again without destroying it. The diagram is only actually destroyed when this command itself is destroyed while the diagram is detached (i.e. while undone). More...

#include <adddiagramcommand.h>

Inherits QUndoCommand.

Collaboration diagram for AddDiagramCommand:

Public Member Functions
	AddDiagramCommand (QETProject *project, Diagram *diagram, int pos=-1, QUndoCommand *parent=nullptr)
	AddDiagramCommand::AddDiagramCommand.
	~AddDiagramCommand () override
	AddDiagramCommand::~AddDiagramCommand Destroy the diagram only if it is currently detached from the project (i.e. this add was undone) – otherwise the project owns it and will destroy it itself.
void	undo () override
void	redo () override

Private Attributes
QPointer< QETProject >	m_project
Diagram *	m_diagram
int	m_position
bool	m_owns_diagram = true
	true while the diagram is detached from the project (not currently in its diagram list)

Detailed Description

The AddDiagramCommand class Undo/redo support for adding a new folio (diagram) to a project. Takes ownership of the (already constructed, not yet inserted) diagram: redo() inserts it into the project, undo() detaches it again without destroying it. The diagram is only actually destroyed when this command itself is destroyed while the diagram is detached (i.e. while undone).

Constructor & Destructor Documentation

AddDiagramCommand()

AddDiagramCommand::AddDiagramCommand	(	QETProject *	project,
		Diagram *	diagram,
		int	pos = -1,
		QUndoCommand *	parent = nullptr )

AddDiagramCommand::AddDiagramCommand.

Parameters

project	: project the diagram is added to
diagram	: the already constructed diagram to add (not yet part of any project's diagram list)
pos	: position to insert the diagram at, -1 to append at the end
parent

~AddDiagramCommand()

AddDiagramCommand::~AddDiagramCommand ( )

override

AddDiagramCommand::~AddDiagramCommand Destroy the diagram only if it is currently detached from the project (i.e. this add was undone) – otherwise the project owns it and will destroy it itself.

Member Function Documentation

redo()

void AddDiagramCommand::redo ( )

override

undo()

void AddDiagramCommand::undo ( )

override

Member Data Documentation

m_diagram

Diagram* AddDiagramCommand::m_diagram

private

m_owns_diagram

bool AddDiagramCommand::m_owns_diagram = true

private

true while the diagram is detached from the project (not currently in its diagram list)

m_position

int AddDiagramCommand::m_position

private

m_project

QPointer<QETProject> AddDiagramCommand::m_project

private

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

• sources/undocommand/adddiagramcommand.h
• sources/undocommand/adddiagramcommand.cpp