Document Class Reference

Base class for all documents. More...

Inherits QObject.

Inherited by ImageDocument, and SimpleDocument.

Public Slots
void	undo ()
	Undoes the last operation.
void	redo ()
	Redoes the current operation.

Signals
void	modificationChanged (bool modified)
	This signal is emitted whenever the content of the document changes in a way that affects the modification state. More...

Public Member Functions
	Document (QObject *parent=Q_NULLPTR)
	Constructs an AbstractDocument with the given parent.
	~Document ()
	Destroys the AbstractDocument object.
bool	isModified () const
	This property holds whether the document has been modified by the user. More...
void	clearUndoStack ()
	Clears the undo redo stack.

Protected Member Functions
	Document (DocumentPrivate &dd, QObject *parent=Q_NULLPTR)
	Constructs an AbstractDocument with the given parent and private class dd.
QUndoStack *	undoStack () const
	Returns pointer to the undo-redo stack. More...

Properties
bool	canRedo
	This property holds whether there are any commands to redo.
bool	canUndo
	This property holds whether there are any commands to redo.

Detailed Description

Base class for all documents.

Provides base functionality like modified state or undo-redo stack.

Member Function Documentation

isModified()

bool Document::isModified

(

)

const

This property holds whether the document has been modified by the user.

By default, this property is false.

See also

modificationChanged()

modificationChanged

Document::modificationChanged ( bool  changed )

signal

This signal is emitted whenever the content of the document changes in a way that affects the modification state.

If changed is true, the document has been modified; otherwise it is false.

For example, calling setModified(false) on a document and then changing a document causes the signal to get emitted. If you undo that operation, causing the document to return to its original unmodified state, the signal will get emitted again.

undoStack()

QUndoStack * Document::undoStack ( ) const

protected

Returns pointer to the undo-redo stack.

Can be used to insert undo-redo commands.