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Diffstat (limited to 'src/gui/editors/notation/NotationCanvasView.h')
| -rw-r--r-- | src/gui/editors/notation/NotationCanvasView.h | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/src/gui/editors/notation/NotationCanvasView.h b/src/gui/editors/notation/NotationCanvasView.h new file mode 100644 index 0000000..5c88fb0 --- /dev/null +++ b/src/gui/editors/notation/NotationCanvasView.h @@ -0,0 +1,218 @@ + +/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ + +/* + Rosegarden + A MIDI and audio sequencer and musical notation editor. + + This program is Copyright 2000-2008 + Guillaume Laurent <[email protected]>, + Chris Cannam <[email protected]>, + Richard Bown <[email protected]> + + The moral rights of Guillaume Laurent, Chris Cannam, and Richard + Bown to claim authorship of this work have been asserted. + + Other copyrights also apply to some parts of this work. Please + see the AUTHORS file and individual file headers for details. + + 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 _RG_NOTATIONCANVASVIEW_H_ +#define _RG_NOTATIONCANVASVIEW_H_ + +#include "gui/general/RosegardenCanvasView.h" +#include <qrect.h> +#include <vector> + + +class QWidget; +class QString; +class QPoint; +class QPaintEvent; +class QPainter; +class QMouseEvent; +class QCanvasLineGroupable; +class QCanvasItemGroup; +class QCanvasItem; +class QCanvas; + + +namespace Rosegarden +{ + +class NotationStaff; +class NotationElement; +class LinedStaffManager; + + +/** + * Central widget for the NotationView window + * + * This class only takes care of the event handling + * (see the various signals). + * + * It does not deal with any canvas element. All elements are added by + * the NotationView. + * + *@see NotationView + */ + +class NotationCanvasView : public RosegardenCanvasView +{ + Q_OBJECT + +public: + NotationCanvasView(const LinedStaffManager &staffmgr, + QCanvas *viewing, QWidget *parent=0, + const char *name=0, WFlags f=0); + + ~NotationCanvasView(); + + void setHeightTracking(bool t); + +signals: + + /** + * Emitted when the user clicks on a staff (e.g. mouse button press) + * \a pitch is set to the MIDI pitch on which the click occurred + * \a staffNo is set to the staff on which the click occurred + * \a point is set to the coordinates of the click event + * \a el points to the NotationElement which was clicked on, if any + */ + void itemPressed(int pitch, int staffNo, + QMouseEvent*, + NotationElement* el); + + /** + * Emitted when the user clicks on a QCanvasItem which is active + * + * @see QCanvasItem#setActive + */ + void activeItemPressed(QMouseEvent*, + QCanvasItem* item); + + /** + * Emitted when the user clicks on a QCanvasItem which is neither + * active nor a notation element + */ + void nonNotationItemPressed(QMouseEvent *, + QCanvasItem *); + + /** + * Emitted when the user clicks on a QCanvasItem which is a + * plain QCanvasText + */ + void textItemPressed(QMouseEvent *, + QCanvasItem *); + + /** + * Emitted when the mouse cursor moves to a different height + * on the staff + * + * \a noteName contains the MIDI name of the corresponding note + */ + void hoveredOverNoteChanged(const QString ¬eName); + + /** + * Emitted when the mouse cursor moves to a note which is at a + * different time + * + * \a time is set to the absolute time of the note the cursor is + * hovering on + */ + void hoveredOverAbsoluteTimeChanged(unsigned int time); + + /** + * Emitted when the mouse cursor moves (used by the selection tool) + */ + void mouseMoved(QMouseEvent*); + + /** + * Emitted when the mouse button is released + */ + void mouseReleased(QMouseEvent*); + + /** + * Emitted when a region is about to be drawn by the canvas view. + * Indicates that any on-demand rendering for that region should + * be carried out. + */ + void renderRequired(double cx0, double cx1); + +public slots: + void slotRenderComplete(); + + void slotExternalWheelEvent(QWheelEvent* e); + +protected: + + virtual void viewportPaintEvent(QPaintEvent *e); + virtual void drawContents(QPainter *p, int cx, int cy, int cw, int ch); + + const LinedStaffManager &m_linedStaffManager; + + /** + * Callback for a mouse button press event in the canvas + */ + virtual void contentsMousePressEvent(QMouseEvent*); + + /** + * Callback for a mouse button release event in the canvas + */ + virtual void contentsMouseReleaseEvent(QMouseEvent*); + + /** + * Callback for a mouse move event in the canvas + */ + virtual void contentsMouseMoveEvent(QMouseEvent*); + + /** + * Callback for a mouse double click event in the canvas + */ + virtual void contentsMouseDoubleClickEvent(QMouseEvent*); + + void processActiveItems(QMouseEvent*, QCanvasItemList); + + void handleMousePress(int height, int staffNo, + QMouseEvent*, + NotationElement* pressedNotationElement = 0); + + bool posIsTooFarFromStaff(const QPoint &pos); + + int getLegerLineCount(int height, bool &offset); + + void setHeightMarkerHeight(QMouseEvent *e); + + NotationElement *getElementAtXCoord(QMouseEvent *e); + + //--------------- Data members --------------------------------- + + int m_lastYPosNearStaff; + + unsigned int m_staffLineThreshold; + + NotationStaff *m_currentStaff; + int m_currentHeight; + + QCanvasItemGroup *m_heightMarker; + QCanvasLineGroupable *m_vert1; + QCanvasLineGroupable *m_vert2; + std::vector<QCanvasLineGroupable *> m_legerLines; + bool m_legerLineOffset; + + bool m_heightTracking; + + QRect m_lastRender; +}; + + + +} + +#endif |