500 lines
16 KiB
C++
500 lines
16 KiB
C++
//=============================================================================
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// MusE Score
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// Linux Music Score Editor
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// $Id:$
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//
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// Copyright (C) 2010 Werner Schweer and others
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License version 2.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//=============================================================================
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#include "drumview.h"
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#include "libmscore/staff.h"
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#include "piano.h"
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#include "libmscore/measure.h"
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#include "libmscore/chord.h"
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#include "libmscore/score.h"
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#include "libmscore/note.h"
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#include "libmscore/slur.h"
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#include "libmscore/segment.h"
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namespace Ms {
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static const int MAP_OFFSET = 480;
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//---------------------------------------------------------
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// pitch2y
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//---------------------------------------------------------
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static int pitch2y(int pitch)
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{
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static int tt[] = {
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12, 19, 25, 32, 38, 51, 58, 64, 71, 77, 84, 90
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};
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int y = (75 * keyHeight) - (tt[pitch % 12] + (7 * keyHeight) * (pitch / 12));
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if (y < 0)
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y = 0;
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return y;
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}
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//---------------------------------------------------------
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// DrumItem
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//---------------------------------------------------------
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DrumItem::DrumItem(Note* n)
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: QGraphicsPolygonItem(), note(n)
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{
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setFlags(flags() | QGraphicsItem::ItemIsSelectable);
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int pitch = n->pitch();
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QPolygonF p;
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double h2 = keyHeight/2;
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p << QPointF(0, -h2) << QPointF(h2, 0.0) << QPointF(0.0, h2) << QPointF(-h2, 0.0);
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setPolygon(p);
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setBrush(QBrush());
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setSelected(n->selected());
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setData(0, QVariant::fromValue<void*>(n));
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setPos(n->chord()->tick() + 480, pitch2y(pitch) + keyHeight / 4);
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setFlag(QGraphicsItem::ItemIgnoresTransformations, true);
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}
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//---------------------------------------------------------
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// paint
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//---------------------------------------------------------
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void DrumItem::paint(QPainter* painter, const QStyleOptionGraphicsItem*, QWidget*)
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{
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// Chord* chord = note->chord();
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int x1 = 0; // note->onTimeOffset() + note->onTimeUserOffset();
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painter->setPen(pen());
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painter->setBrush(isSelected() ? Qt::yellow : Qt::blue);
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painter->drawPolygon(polygon().translated(x1, 0.0));
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}
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//---------------------------------------------------------
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// pix2pos
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//---------------------------------------------------------
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Pos DrumView::pix2pos(int x) const
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{
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x -= MAP_OFFSET;
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if (x < 0)
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x = 0;
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return Pos(staff->score()->tempomap(), staff->score()->sigmap(), x, _timeType);
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}
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//---------------------------------------------------------
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// pos2pix
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//---------------------------------------------------------
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int DrumView::pos2pix(const Pos& p) const
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{
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return p.time(_timeType) + MAP_OFFSET;
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}
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//---------------------------------------------------------
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// drawBackground
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//---------------------------------------------------------
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void DrumView::drawBackground(QPainter* p, const QRectF& r)
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{
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if (staff == 0)
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return;
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Score* _score = staff->score();
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QRectF r1;
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r1.setCoords(-1000000.0, 0.0, 480.0, 1000000.0);
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QRectF r2;
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r2.setCoords(ticks + 480, 0.0, 1000000.0, 1000000.0);
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QColor bg(0x71, 0x8d, 0xbe);
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p->fillRect(r, bg);
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if (r.intersects(r1))
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p->fillRect(r.intersected(r1), bg.darker(150));
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if (r.intersects(r2))
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p->fillRect(r.intersected(r2), bg.darker(150));
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//
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// draw horizontal grid lines
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//
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qreal y1 = r.y();
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qreal y2 = y1 + r.height();
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qreal kh = 13.0;
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qreal x1 = r.x();
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qreal x2 = x1 + r.width();
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int key = floor(y1 / 75);
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qreal y = key * kh;
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for (; key < 75; ++key, y += kh) {
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if (y < y1)
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continue;
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if (y > y2)
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break;
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p->setPen(QPen((key % 7) == 5 ? Qt::lightGray : Qt::gray));
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p->drawLine(QLineF(x1, y, x2, y));
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}
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//
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// draw vertical grid lines
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//
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static const int mag[7] = {
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1, 1, 2, 5, 10, 20, 50
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};
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Pos pos1 = pix2pos(x1);
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Pos pos2 = pix2pos(x2);
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//---------------------------------------------------
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// draw raster
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//---------------------------------------------------
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int bar1, bar2, beat, tick;
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pos1.mbt(&bar1, &beat, &tick);
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pos2.mbt(&bar2, &beat, &tick);
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int n = mag[magStep < 0 ? 0 : magStep];
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bar1 = (bar1 / n) * n; // round down
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if (bar1 && n >= 2)
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bar1 -= 1;
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bar2 = ((bar2 + n - 1) / n) * n; // round up
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for (int bar = bar1; bar <= bar2;) {
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Pos stick(_score->tempomap(), _score->sigmap(), bar, 0, 0);
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if (magStep > 0) {
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double x = double(pos2pix(stick));
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if (x > 0) {
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p->setPen(Qt::lightGray);
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p->drawLine(x, y1, x, y2);
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}
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else {
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p->setPen(Qt::black);
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p->drawLine(x, y1, x, y1);
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}
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}
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else {
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int z = stick.timesig().timesig().numerator();
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for (int beat = 0; beat < z; beat++) {
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if (magStep == 0) {
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Pos xx(_score->tempomap(), _score->sigmap(), bar, beat, 0);
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int xp = pos2pix(xx);
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if (xp < 0)
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continue;
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if (xp > 0) {
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p->setPen(beat == 0 ? Qt::lightGray : Qt::gray);
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p->drawLine(xp, y1, xp, y2);
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}
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else {
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p->setPen(Qt::black);
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p->drawLine(xp, y1, xp, y2);
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}
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}
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else {
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int k;
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if (magStep == -1)
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k = 2;
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else if (magStep == -2)
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k = 4;
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else if (magStep == -3)
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k = 8;
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else if (magStep == -4)
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k = 16;
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else
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k = 32;
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int n = (MScore::division * 4) / stick.timesig().timesig().denominator();
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for (int i = 0; i < k; ++i) {
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Pos xx(_score->tempomap(), _score->sigmap(), bar, beat, (n * i)/ k);
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int xp = pos2pix(xx);
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if (xp < 0)
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continue;
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if (xp > 0) {
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p->setPen(i == 0 && beat == 0 ? Qt::lightGray : Qt::gray);
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p->drawLine(xp, y1, xp, y2);
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}
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else {
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p->setPen(Qt::black);
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p->drawLine(xp, y1, xp, y2);
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}
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}
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}
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}
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}
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if (bar == 0 && n >= 2)
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bar += (n-1);
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else
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bar += n;
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}
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}
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//---------------------------------------------------------
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// DrumView
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//---------------------------------------------------------
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DrumView::DrumView()
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: QGraphicsView()
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{
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setScene(new QGraphicsScene);
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setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
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setResizeAnchor(QGraphicsView::AnchorUnderMouse);
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setMouseTracking(true);
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setRubberBandSelectionMode(Qt::IntersectsItemBoundingRect);
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setDragMode(QGraphicsView::RubberBandDrag);
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_timeType = TType::TICKS;
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magStep = 0;
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}
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//---------------------------------------------------------
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// setStaff
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//---------------------------------------------------------
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void DrumView::setStaff(Staff* s, Pos* l)
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{
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static const QColor lcColors[3] = { Qt::red, Qt::blue, Qt::blue };
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staff = s;
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_locator = l;
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pos.setContext(s->score()->tempomap(), s->score()->sigmap());
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scene()->blockSignals(true);
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scene()->clear();
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for (int i = 0; i < 3; ++i) {
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locatorLines[i] = new QGraphicsLineItem(QLineF(0.0, 0.0, 0.0, keyHeight * 75.0 * 5));
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QPen pen(lcColors[i]);
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pen.setWidth(2);
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locatorLines[i]->setPen(pen);
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locatorLines[i]->setZValue(1000+i); // set stacking order
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locatorLines[i]->setFlag(QGraphicsItem::ItemIgnoresTransformations, true);
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scene()->addItem(locatorLines[i]);
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}
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int staffIdx = staff->idx();
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int startTrack = staffIdx * VOICES;
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int endTrack = startTrack + VOICES;
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for (Segment* s = staff->score()->firstSegment(); s; s = s->next1()) {
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for (int track = startTrack; track < endTrack; ++track) {
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Element* e = s->element(track);
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if (e == 0 || e->type() != Element::Type::CHORD)
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continue;
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Chord* chord = static_cast<Chord*>(e);
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foreach(Note* n, chord->notes()) {
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if (n->tieBack())
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continue;
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scene()->addItem(new DrumItem(n));
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}
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}
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}
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scene()->blockSignals(false);
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Measure* lm = staff->score()->lastMeasure();
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ticks = lm->tick() + lm->ticks();
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scene()->setSceneRect(0.0, 0.0, double(ticks + 960), keyHeight * 75);
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for (int i = 0; i < 3; ++i)
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moveLocator(i);
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//
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// move to something interesting
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//
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QList<QGraphicsItem*> items = scene()->selectedItems();
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QRectF boundingRect;
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foreach(QGraphicsItem* item, items) {
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Note* note = static_cast<Note*>(item->data(0).value<void*>());
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if (note)
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boundingRect |= item->mapToScene(item->boundingRect()).boundingRect();
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}
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centerOn(boundingRect.center());
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}
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//---------------------------------------------------------
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// moveLocator
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//---------------------------------------------------------
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void DrumView::moveLocator(int i)
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{
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if (_locator[i].valid()) {
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locatorLines[i]->setVisible(true);
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qreal x = qreal(pos2pix(_locator[i]));
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locatorLines[i]->setPos(QPointF(x, 0.0));
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}
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else
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locatorLines[i]->setVisible(false);
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}
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//---------------------------------------------------------
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// wheelEvent
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//---------------------------------------------------------
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void DrumView::wheelEvent(QWheelEvent* event)
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{
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int step = event->delta() / 120;
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double xmag = transform().m11();
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double ymag = transform().m22();
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if (event->modifiers() == Qt::ControlModifier) {
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if (step > 0) {
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for (int i = 0; i < step; ++i) {
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if (xmag > 10.0)
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break;
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scale(1.1, 1.0);
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xmag *= 1.1;
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}
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}
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else {
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for (int i = 0; i < -step; ++i) {
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if (xmag < 0.001)
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break;
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scale(.9, 1.0);
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xmag *= .9;
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}
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}
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emit magChanged(xmag, ymag);
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int tpix = (480 * 4) * xmag;
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magStep = -5;
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if (tpix <= 4000)
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magStep = -4;
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if (tpix <= 2000)
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magStep = -3;
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if (tpix <= 1000)
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magStep = -2;
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if (tpix <= 500)
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magStep = -1;
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if (tpix <= 128)
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magStep = 0;
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if (tpix <= 64)
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magStep = 1;
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if (tpix <= 32)
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magStep = 2;
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if (tpix <= 16)
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magStep = 3;
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if (tpix <= 8)
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magStep = 4;
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if (tpix <= 4)
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magStep = 5;
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if (tpix <= 2)
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magStep = 6;
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//
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// if xpos <= 0, then the scene is centered
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// there is no scroll bar anymore sending
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// change signals, so we have to do it here:
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//
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double xpos = -(mapFromScene(QPointF()).x());
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if (xpos <= 0)
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emit xposChanged(xpos);
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}
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else if (event->modifiers() == Qt::ShiftModifier) {
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QWheelEvent we(event->pos(), event->delta(), event->buttons(), 0, Qt::Horizontal);
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QGraphicsView::wheelEvent(&we);
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}
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else if (event->modifiers() == 0) {
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QGraphicsView::wheelEvent(event);
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}
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else if (event->modifiers() == (Qt::ShiftModifier | Qt::ControlModifier)) {
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if (step > 0) {
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for (int i = 0; i < step; ++i) {
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if (ymag > 3.0)
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break;
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scale(1.0, 1.1);
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ymag *= 1.1;
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}
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}
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else {
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for (int i = 0; i < -step; ++i) {
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if (ymag < 0.4)
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break;
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scale(1.0, .9);
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ymag *= .9;
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}
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}
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emit magChanged(xmag, ymag);
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}
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}
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//---------------------------------------------------------
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// y2pitch
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//---------------------------------------------------------
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int DrumView::y2pitch(int y) const
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{
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int pitch;
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const int total = (10 * 7 + 5) * keyHeight; // 75 Ganztonschritte
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y = total - y;
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int oct = (y / (7 * keyHeight)) * 12;
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static const char kt[] = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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1, 1, 1, 1, 1, 1, 1,
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2, 2, 2, 2, 2, 2,
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3, 3, 3, 3, 3, 3, 3,
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4, 4, 4, 4, 4, 4, 4, 4, 4,
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
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6, 6, 6, 6, 6, 6, 6,
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7, 7, 7, 7, 7, 7,
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8, 8, 8, 8, 8, 8, 8,
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9, 9, 9, 9, 9, 9,
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10, 10, 10, 10, 10, 10, 10,
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11, 11, 11, 11, 11, 11, 11, 11, 11, 11
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};
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pitch = kt[y % 91] + oct;
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if (pitch < 0 || pitch > 127)
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pitch = -1;
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return pitch;
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}
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//---------------------------------------------------------
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// mouseMoveEvent
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//---------------------------------------------------------
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void DrumView::mouseMoveEvent(QMouseEvent* event)
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{
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QPointF p(mapToScene(event->pos()));
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int pitch = y2pitch(int(p.y()));
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emit pitchChanged(pitch);
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int tick = int(p.x()) -480;
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if (tick < 0) {
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tick = 0;
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pos.setTick(tick);
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pos.setInvalid();
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}
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else
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pos.setTick(tick);
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emit posChanged(pos);
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QGraphicsView::mouseMoveEvent(event);
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}
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//---------------------------------------------------------
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// leaveEvent
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//---------------------------------------------------------
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void DrumView::leaveEvent(QEvent* event)
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{
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emit pitchChanged(-1);
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pos.setInvalid();
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emit posChanged(pos);
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QGraphicsView::leaveEvent(event);
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}
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//---------------------------------------------------------
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// ensureVisible
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//---------------------------------------------------------
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void DrumView::ensureVisible(int tick)
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{
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tick += MAP_OFFSET;
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QPointF pt = mapToScene(0, height() / 2);
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QGraphicsView::ensureVisible(qreal(tick), pt.y(), 240.0, 1.0);
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}
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}
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