Added old abandoned KDE3 version of the RoseGarden MIDI tool

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/rosegarden@1097595 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 162 insertions, 0 deletions

diff --git a/src/gui/editors/matrix/MatrixCanvasView.h b/src/gui/editors/matrix/MatrixCanvasView.h
new file mode 100644
index 0000000..2ec4c7e
--- /dev/null
+++ b/src/gui/editors/matrix/MatrixCanvasView.h
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+
+/* -*- 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   <glaurent@telegraph-road.org>,
+        Chris Cannam        <cannam@all-day-breakfast.com>,
+        Richard Bown        <richard.bown@ferventsoftware.com>
+
+    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_MATRIXCANVASVIEW_H_
+#define _RG_MATRIXCANVASVIEW_H_
+
+#include "gui/general/RosegardenCanvasView.h"
+#include "base/Event.h"
+
+
+class QWidget;
+class QWheelEvent;
+class QMouseEvent;
+class QCanvasItem;
+class QCanvas;
+
+
+namespace Rosegarden
+{
+
+class SnapGrid;
+class MatrixStaff;
+class MatrixElement;
+
+
+class MatrixCanvasView : public RosegardenCanvasView
+{
+    Q_OBJECT
+
+public:
+    MatrixCanvasView(MatrixStaff&,
+                     SnapGrid *,
+                     bool drumMode,
+                     QCanvas *viewing,
+                     QWidget *parent=0, const char *name=0, WFlags f=0);
+
+    ~MatrixCanvasView();
+
+    void setSmoothModifier(Qt::ButtonState s) { m_smoothModifier = s; }
+    Qt::ButtonState getSmoothModifier()       { return m_smoothModifier; }
+
+signals:
+
+    /**
+     * Emitted when the user clicks on a QCanvasItem which is active
+     *
+     * @see QCanvasItem#setActive
+     */
+    void activeItemPressed(QMouseEvent*,
+                           QCanvasItem* item);
+
+    /**
+     * Emitted when the mouse cursor moves to a different height
+     * on the staff.  Returns the new pitch.
+     */
+    void hoveredOverNoteChanged(int evPitch, bool haveEvent,
+                                timeT evTime);
+
+    /**
+     * 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);
+
+    void mousePressed(timeT time, int pitch,
+                      QMouseEvent*, MatrixElement*);
+
+    void mouseMoved(timeT time, int pitch, QMouseEvent*);
+
+    void mouseReleased(timeT time, int pitch, QMouseEvent*);
+
+    void mouseEntered();
+    void mouseLeft();
+
+public slots:
+    void slotExternalWheelEvent(QWheelEvent*);
+
+protected:
+    /**
+     * Callback for a mouse button press event in the canvas
+     */
+    virtual void contentsMousePressEvent(QMouseEvent*);
+
+    /**
+     * Callback for a mouse move event in the canvas
+     */
+    virtual void contentsMouseMoveEvent(QMouseEvent*);
+
+    /**
+     * Callback for a mouse button release event in the canvas
+     */
+    virtual void contentsMouseReleaseEvent(QMouseEvent*);
+
+    /**
+     * Callback for a mouse double-click event in the canvas
+     *
+     * NOTE: a double click event is always preceded by a mouse press
+     * event
+     */
+    virtual void contentsMouseDoubleClickEvent(QMouseEvent*);
+
+    virtual void enterEvent(QEvent *);
+    virtual void leaveEvent(QEvent *);
+
+    /**
+     * Update the value of snap grid according to the button's state
+     *
+     * If the button was pressed with the 'smooth' modifier, set the
+     * grid so it won't snap time.
+     *
+     * @see #setSmoothModifier
+     * @see #getSmoothModifier
+     */
+    void updateGridSnap(QMouseEvent *e);
+
+    //--------------- Data members ---------------------------------
+
+    MatrixStaff          &m_staff;
+    SnapGrid *m_snapGrid;
+    bool                  m_drumMode;
+
+    timeT     m_previousEvTime;
+    int                   m_previousEvPitch;
+
+    bool                  m_mouseWasPressed;
+    bool                  m_ignoreClick;
+
+    Qt::ButtonState       m_smoothModifier;
+    timeT     m_lastSnap;
+    bool                  m_isSnapTemporary;
+};
+
+
+
+}
+
+#endif