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, 220 insertions, 0 deletions

diff --git a/src/gui/editors/matrix/MatrixHLayout.cpp b/src/gui/editors/matrix/MatrixHLayout.cpp
new file mode 100644
index 0000000..99b89c2
--- /dev/null
+++ b/src/gui/editors/matrix/MatrixHLayout.cpp
@@ -0,0 +1,220 @@
+/* -*- 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.
+*/
+
+
+#include "MatrixHLayout.h"
+#include "MatrixElement.h"
+#include "misc/Debug.h"
+
+#include "base/Composition.h"
+#include "base/LayoutEngine.h"
+#include "base/NotationTypes.h"
+#include "base/Profiler.h"
+#include "base/Segment.h"
+#include "base/Staff.h"
+#include "MatrixStaff.h"
+
+#include <cmath>
+
+
+namespace Rosegarden
+{
+
+MatrixHLayout::MatrixHLayout(Composition *c) :
+        HorizontalLayoutEngine(c),
+        m_totalWidth(0.0),
+        m_firstBar(0)
+{}
+
+MatrixHLayout::~MatrixHLayout()
+{}
+
+void MatrixHLayout::reset()
+{}
+
+void MatrixHLayout::resetStaff(Staff&, timeT, timeT)
+{}
+
+void MatrixHLayout::scanStaff(Staff &staffBase,
+                              timeT startTime, timeT endTime)
+{
+    Profiler profiler("MatrixHLayout::scanStaff", true);
+
+    // The Matrix layout is not currently designed to be able to lay
+    // out more than one staff, because we have no requirement to show
+    // more than one at once in the Matrix view.  To make it work for
+    // multiple staffs should be straightforward; we just need to bear
+    // in mind that they might start and end at different times (hence
+    // the total width and bar list can't just be calculated from the
+    // last staff scanned as they are now).
+
+    MatrixStaff &staff = static_cast<MatrixStaff &>(staffBase);
+    bool isFullScan = (startTime == endTime);
+
+    MatrixElementList *notes = staff.getViewElementList();
+    MatrixElementList::iterator startItr = notes->begin();
+    MatrixElementList::iterator endItr = notes->end();
+
+    if (!isFullScan) {
+        startItr = notes->findNearestTime(startTime);
+        if (startItr == notes->end())
+            startItr = notes->begin();
+        endItr = notes->findTime(endTime);
+    }
+
+    if (endItr == notes->end() && startItr == notes->begin()) {
+        isFullScan = true;
+    }
+
+    // Do this in two parts: bar lines separately from elements.
+    // (We don't need to do all that stuff notationhlayout has to do,
+    // scanning the notes bar-by-bar; we can just place the bar lines
+    // in the theoretically-correct places and do the same with the
+    // notes quite independently.)
+
+    Segment &segment = staff.getSegment();
+    Composition *composition = segment.getComposition();
+    m_firstBar = composition->getBarNumber(segment.getStartTime());
+    timeT from = composition->getBarStart(m_firstBar),
+                 to = composition->getBarEndForTime(segment.getEndMarkerTime());
+
+    double startPosition = from;
+
+    // 1. Bar lines and time signatures.  We only re-make these on
+    // full scans.
+
+    if (isFullScan || m_barData.size() == 0) {
+
+        m_barData.clear();
+        int barNo = m_firstBar;
+
+        MATRIX_DEBUG << "MatrixHLayout::scanStaff() : start time = " << startTime << ", first bar = " << m_firstBar << ", end time = " << endTime << ", end marker time = " << segment.getEndMarkerTime() << ", from = " << from << ", to = " << to << endl;
+
+        // hack for partial bars
+        //
+        timeT adjTo = to;
+
+        if (composition->getBarStartForTime(segment.getEndMarkerTime())
+                != segment.getEndMarkerTime())
+            adjTo++;
+
+        while (from < adjTo) {
+
+            bool isNew = false;
+            TimeSignature timeSig =
+                composition->getTimeSignatureInBar(barNo, isNew);
+
+            if (isNew || barNo == m_firstBar) {
+                m_barData.push_back(BarData((from - startPosition) *
+                                            staff.getTimeScaleFactor(),
+                                            TimeSigData(true, timeSig)));
+            } else {
+                m_barData.push_back(BarData((from - startPosition) *
+                                            staff.getTimeScaleFactor(),
+                                            TimeSigData(false, timeSig)));
+            }
+
+            from = composition->getBarEndForTime(from);
+            ++barNo;
+        }
+
+        m_barData.push_back(BarData(to * staff.getTimeScaleFactor(),
+                                    TimeSigData(false, TimeSignature())));
+    }
+
+    // 2. Elements
+
+    m_totalWidth = 0.0;
+    MatrixElementList::iterator i = startItr;
+
+    while (i != endItr) {
+
+        (*i)->setLayoutX(((*i)->getViewAbsoluteTime() - startPosition)
+                         * staff.getTimeScaleFactor());
+
+        double width = (*i)->getViewDuration() * staff.getTimeScaleFactor();
+
+        // Make sure that very small elements can still be seen
+        //
+        if (width < 3) width = 3;
+        else width += 1; // fiddle factor
+
+        static_cast<MatrixElement*>((*i))->setWidth(lrint(width));
+
+        if (isFullScan) {
+            m_totalWidth = (*i)->getLayoutX() + width;
+        } else {
+            m_totalWidth = std::max(m_totalWidth, (*i)->getLayoutX() + width);
+        }
+
+        ++i;
+    }
+}
+
+double MatrixHLayout::getTotalWidth() const
+{
+    return m_totalWidth;
+}
+
+int MatrixHLayout::getFirstVisibleBar() const
+{
+    return m_firstBar;
+}
+
+int MatrixHLayout::getLastVisibleBar() const
+{
+    int barNo = m_firstBar + m_barData.size() - 2;
+    if (barNo < m_firstBar + 1)
+        barNo = m_firstBar + 1;
+
+    return barNo;
+}
+
+double MatrixHLayout::getBarPosition(int barNo) const
+{
+    if (barNo < getFirstVisibleBar()) {
+        return getBarPosition(getFirstVisibleBar());
+    }
+
+    if (barNo > getLastVisibleBar()) {
+        return getBarPosition(getLastVisibleBar());
+    }
+
+    return m_barData[barNo - m_firstBar].first;
+}
+
+bool MatrixHLayout::getTimeSignaturePosition(Staff &,
+        int barNo,
+        TimeSignature &timeSig,
+        double &timeSigX)
+{
+    timeSig = m_barData[barNo - m_firstBar].second.second;
+    timeSigX = m_barData[barNo - m_firstBar].first;
+    return m_barData[barNo - m_firstBar].second.first;
+}
+
+void MatrixHLayout::finishLayout(timeT, timeT)
+{}
+
+}