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// -*- c-basic-offset: 4 -*-
/*
Rosegarden-4
A sequencer and musical notation editor.
This program is Copyright 2000-2005
Guillaume Laurent <glaurent@telegraph-road.org>,
Chris Cannam <cannam@all-day-breakfast.com>,
Richard Bown <bownie@bownie.com>
The moral right of the authors to claim authorship of this work
has been asserted.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version. See the file
COPYING included with this distribution for more information.
*/
#ifndef NOTATIONELEMENT_H
#define NOTATIONELEMENT_H
#include <set>
#include "ViewElement.h"
#include "NotationTypes.h"
#include "BaseProperties.h"
class QCanvasItem;
/**
* The Notation H and V layout is performed on a
* NotationElementList. Once this is done, each NotationElement is
* affected a QCanvasItem which is set at these coords.
*
* @see NotationView#showElements()
*/
class NotationElement : public Rosegarden::ViewElement
{
public:
typedef Rosegarden::Exception NoCanvasItem;
NotationElement(Rosegarden::Event *event);
~NotationElement();
virtual Rosegarden::timeT getViewAbsoluteTime() const;
virtual Rosegarden::timeT getViewDuration() const;
void getLayoutAirspace(double &x, double &width) {
x = m_airX;
width = m_airWidth;
}
void getCanvasAirspace(double &x, double &width) {
x = m_airX - getLayoutX() + getCanvasX();
width = m_airWidth;
}
/// returns the x pos of the associated canvas item
double getCanvasX();
/// returns the y pos of the associated canvas item
double getCanvasY();
/**
* Sets the X coordinate and width of the space "underneath"
* this element, i.e. the extents within which a mouse click
* or some such might be considered to be interested in this
* element as opposed to any other. These are layout coords
*/
void setLayoutAirspace(double x, double width) {
m_airX = x; m_airWidth = width;
}
/// Returns true if the wrapped event is a rest
bool isRest() const;
/// Returns true if the wrapped event is a note
bool isNote() const;
/// Returns true if the wrapped event is a tuplet
bool isTuplet() const;
/// Returns true if the wrapped event is a grace note
bool isGrace() const;
/**
* Sets the canvas item representing this notation element on screen.
*
* NOTE: The object takes ownership of its canvas item.
*/
void setCanvasItem(QCanvasItem *e, double canvasX, double canvasY);
/**
* Add an extra canvas item associated with this element, for
* example where an element has been split across two or more
* staff rows.
*
* The element will take ownership of these canvas items and
* delete them when it deletes the main canvas item.
*/
void addCanvasItem(QCanvasItem *e, double canvasX, double canvasY);
/**
* Remove the main canvas item and any additional ones.
*/
void removeCanvasItem();
/**
* Reset the position of the canvas item (which is assumed to
* exist already).
*/
void reposition(double canvasX, double canvasY);
/**
* Return true if setCanvasItem has been called more recently
* than reposition. If true, any code that positions this
* element will probably not need to regenerate its sprite as
* well, even if other indications suggest otherwise.
*/
bool isRecentlyRegenerated() { return m_recentlyRegenerated; }
bool isSelected();
void setSelected(bool selected);
/// Returns the associated canvas item
QCanvasItem* getCanvasItem() { return m_canvasItem; }
protected:
//--------------- Data members ---------------------------------
double m_airX;
double m_airWidth;
bool m_recentlyRegenerated;
QCanvasItem *m_canvasItem;
typedef std::vector<QCanvasItem *> ItemList;
ItemList *m_extraItems;
};
typedef Rosegarden::ViewElementList NotationElementList;
#endif
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