1 files changed, 160 insertions, 0 deletions
diff --git a/src/gui/editors/matrix/MatrixElement.cpp b/src/gui/editors/matrix/MatrixElement.cpp
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--- /dev/null
+++ b/src/gui/editors/matrix/MatrixElement.cpp
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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   <[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.
+*/
+
+
+#include "MatrixElement.h"
+#include "misc/Debug.h"
+
+#include "base/Event.h"
+#include "base/NotationTypes.h"
+#include "base/ViewElement.h"
+#include "gui/general/GUIPalette.h"
+#include "QCanvasMatrixDiamond.h"
+#include "QCanvasMatrixRectangle.h"
+#include <qbrush.h>
+#include <qcanvas.h>
+#include <qcolor.h>
+
+
+namespace Rosegarden
+{
+
+MatrixElement::MatrixElement(Event *event, bool drum) :
+        ViewElement(event),
+        m_canvasRect(drum ?
+                     new QCanvasMatrixDiamond(*this, 0) :
+                     new QCanvasMatrixRectangle(*this, 0)),
+        m_overlapRectangles(NULL)
+{
+    //     MATRIX_DEBUG << "new MatrixElement "
+    //                          << this << " wrapping " << event << endl;
+}
+
+MatrixElement::~MatrixElement()
+{
+    //     MATRIX_DEBUG << "MatrixElement " << this << "::~MatrixElement() wrapping "
+    //                          << event() << endl;
+
+    m_canvasRect->hide();
+    delete m_canvasRect;
+
+    removeOverlapRectangles();
+}
+
+void MatrixElement::setCanvas(QCanvas* c)
+{
+    if (!m_canvasRect->canvas()) {
+
+        m_canvasRect->setCanvas(c);
+
+        // We set this by velocity now (matrixstaff.cpp)
+        //
+        //m_canvasRect->setBrush(RosegardenGUIColours::MatrixElementBlock);
+
+        m_canvasRect->setPen(GUIPalette::getColour(GUIPalette::MatrixElementBorder));
+        m_canvasRect->show();
+    }
+}
+
+bool MatrixElement::isNote() const
+{
+    return event()->isa(Note::EventType);
+}
+
+void MatrixElement::drawOverlapRectangles()
+{
+    if (m_overlapRectangles) removeOverlapRectangles();
+
+    QRect elRect = m_canvasRect->rect();
+    QCanvasItemList
+          itemList = m_canvasRect->canvas()->collisions(elRect);
+    QCanvasItemList::Iterator it;
+    MatrixElement* mel = 0;
+
+
+    for (it = itemList.begin(); it != itemList.end(); ++it) {
+
+        QCanvasMatrixRectangle *mRect = 0;
+        if ((mRect = dynamic_cast<QCanvasMatrixRectangle*>(*it))) {
+
+            // Element does'nt collide with itself
+            if (mRect == m_canvasRect) continue;
+
+            QRect rect = mRect->rect() & elRect;
+            if (!rect.isEmpty()) {
+                if (!m_overlapRectangles) {
+                    m_overlapRectangles = new OverlapRectangles();
+                }
+
+                QCanvasRectangle *
+                    overlap = new QCanvasRectangle(rect, m_canvasRect->canvas());
+                overlap->setBrush(GUIPalette::getColour(GUIPalette::MatrixOverlapBlock));
+                overlap->setZ(getCanvasZ() + 1);
+                overlap->show();
+                m_overlapRectangles->push_back(overlap);
+            }
+        }
+    }
+}
+
+void MatrixElement::redrawOverlaps(QRect rect)
+{
+    QCanvasItemList
+          itemList = m_canvasRect->canvas()->collisions(rect);
+    QCanvasItemList::Iterator it;
+    MatrixElement* mel = 0;
+
+    for (it = itemList.begin(); it != itemList.end(); ++it) {
+        QCanvasMatrixRectangle *mRect = 0;
+        if ((mRect = dynamic_cast<QCanvasMatrixRectangle*>(*it))) {
+            mRect->getMatrixElement().drawOverlapRectangles();
+        }
+    }
+}
+
+void MatrixElement::removeOverlapRectangles()
+{
+    if (!m_overlapRectangles) return;
+
+    OverlapRectangles::iterator it;
+    for (it = m_overlapRectangles->begin(); it != m_overlapRectangles->end(); ++it) {
+        (*it)->hide();
+        delete *it;
+    }
+
+    delete m_overlapRectangles;
+    m_overlapRectangles = NULL;
+}
+
+bool MatrixElement::getVisibleRectangle(QRect &rectangle)
+{
+    if (m_canvasRect && m_canvasRect->isVisible()) {
+        rectangle = m_canvasRect->rect();
+        return true;
+    }
+    return false;
+}
+
+
+}