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piano.cpp
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piano.cpp
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//=============================================================================
// MusE Score
// Linux Music Score Editor
// $Id:$
//
// Copyright (C) 2009 Werner Schweer and others
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//=============================================================================
#include "piano.h"
QPixmap* Piano::octave;
QPixmap* Piano::mk1;
QPixmap* Piano::mk2;
QPixmap* Piano::mk3;
QPixmap* Piano::mk4;
//---------------------------------------------------------
// Piano
//---------------------------------------------------------
Piano::Piano(QWidget* parent)
: QWidget(parent)
{
setMouseTracking(true);
_ymag = 1.0;
setAttribute(Qt::WA_NoSystemBackground);
setAttribute(Qt::WA_StaticContents);
setMouseTracking(true);
/*
0 1 2 3 4 5 6 7 8 9 10
c-2 c-1 C0 C1 C2 C3 C4 C5 C6 C7 C8 - G8
Grid ve:
+------------+ ------------------------------
11 | |
| b | 7
+------+ |
10 | a# +-----+ ..............................
+------+ a |
9 | | 6
+------+ |
8 | g# +-----+ ..............................
+------+ g |
7 | | 5
+------+ |
6 | f# +-----+ ..............................
+------+ f |
5 | | 4
| |
+------------+ ------------------------------
4 | |
| e | 3
+------+ |
3 | d# +-----+ ..............................
+------+ d |
2 | | 2
+------+ |
1 | c# +-----+ ..............................
+------+ c |
| | 1
0 | |
+------------+ ------------------------------
*/
static const char *oct_xpm[] = {
// w h colors
"40 91 2 1",
". c #f0f0f0",
"# c #000000",
// x
"####################################### ",
".......................................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#", // 10
".......................................#",
".......................................#",
".......................................#",
".......................................#", //------------------------
"#######################................#",
"########################...............#",
"########################...............#",
"####################################### ", // 7
"########################...............#",
"########################...............#",
"#######################................#", //------------------------
".......................................#",
".......................................#",
".......................................#", // 6
".......................................#",
".......................................#",
".......................................#", //------------------------
"#######################................#",
"########################...............#",
"########################...............#", // 7
"####################################### ",
"########################...............#",
"########################...............#",
"#######################................#", //------------------------
".......................................#",
".......................................#",
".......................................#", // 6
".......................................#",
".......................................#",
".......................................#", //------------------------
"#######################................#",
"########################...............#",
"########################...............#", // 7
"####################################### ",
"########################...............#",
"########################...............#",
"#######################................#", //------------------------
".......................................#",
".......................................#",
".......................................#",
".......................................#", // 10
".......................................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#",
"####################################### ", //----------------------
".......................................#",
".......................................#",
".......................................#",
".......................................#", // 9
".......................................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#", //------------------------
"#######################................#",
"########################...............#",
"########################...............#",
"####################################### ", // 7
"########################...............#",
"########################...............#",
"#######################................#", //------------------------
".......................................#",
".......................................#",
".......................................#", // 6
".......................................#",
".......................................#",
".......................................#", //--------------------------
"#######################................#",
"########################...............#",
"########################...............#", // 7
"####################################### ",
"########################...............#",
"########################...............#",
"#######################................#", //------------------------
".......................................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#", // 10
".......................................#",
".......................................#",
".......................................#",
".......................................#",
};
static const char *mk1_xpm[] = {
"40 13 2 1",
". c #ff0000",
"# c none",
".......................................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#",
"#######################................#",
"########################...............#",
"########################...............#",
"####################################### ",
};
static const char *mk2_xpm[] = {
"40 13 2 1",
". c #ff0000",
"# c none",
"########################...............#",
"########################...............#",
"#######################................#", //------------------------
".......................................#",
".......................................#",
".......................................#", // 6
".......................................#",
".......................................#",
".......................................#", //--------------------------
"#######################................#",
"########################...............#",
"########################...............#", // 7
"####################################### ",
};
static const char *mk3_xpm[] = {
"40 13 2 1",
". c #ff0000",
"# c none",
"########################...............#",
"########################...............#",
"#######################................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#",
".......................................#",
"########################################",
};
static const char *mk4_xpm[] = {
"40 13 2 1",
"# c #ff0000",
". c none",
"........................................",
"........................................",
"........................................",
"#######################.................",
"########################................",
"########################................",
"########################................",
"########################................",
"########################................",
"#######################.................",
"........................................",
"........................................",
"........................................",
};
if (octave == 0) {
octave = new QPixmap(oct_xpm);
mk1 = new QPixmap(mk1_xpm);
mk2 = new QPixmap(mk2_xpm);
mk3 = new QPixmap(mk3_xpm);
mk4 = new QPixmap(mk4_xpm);
}
yRange = keyHeight * 75;
curPitch = -1;
_ypos = 0;
curKeyPressed = -1;
_orientation = PIANO_VERTICAL;
}
//---------------------------------------------------------
// pitch2y
// y = 0 == origin of rCanvasA
//---------------------------------------------------------
int Piano::pitch2y(int pitch) const
{
static int tt[] = {
12, 19, 25, 32, 38, 51, 58, 64, 71, 77, 84, 90
};
int y = (75 * keyHeight) - (tt[pitch % 12] + (7 * keyHeight) * (pitch / 12));
if (y < 0)
y = 0;
return lrint(y - _ypos / _ymag);
}
//---------------------------------------------------------
// y2pitch
// y = 0 == origin of rCanvasA
//---------------------------------------------------------
int Piano::y2pitch(int y) const
{
y = lrint((y + _ypos) / _ymag);
static const int total = (10 * 7 + 5) * keyHeight; // 75 steps
y = total - y;
int oct = (y / (7 * keyHeight)) * 12;
static const char kt[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3,
4, 4, 4, 4, 4, 4, 4, 4, 4,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
6, 6, 6, 6, 6, 6, 6,
7, 7, 7, 7, 7, 7,
8, 8, 8, 8, 8, 8, 8,
9, 9, 9, 9, 9, 9,
10, 10, 10, 10, 10, 10, 10,
11, 11, 11, 11, 11, 11, 11, 11, 11, 11
};
int pitch = kt[y % 91] + oct;
if (pitch < 0 || pitch > 127)
pitch = -1;
return pitch;
}
//---------------------------------------------------------
// paint
//---------------------------------------------------------
void Piano::paintEvent(QPaintEvent* event)
{
QPainter p(this);
const QRect& rr = event->rect();
QRect r;
if (_orientation == PIANO_HORIZONTAL) {
int w = keyHeight * 52;
p.translate(w, 0);
p.rotate(90.0);
r.setWidth(rr.height());
r.setHeight(rr.width());
r.setX(0);
r.setY(0);
}
else
r = rr;
p.setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform | QPainter::TextAntialiasing);
int d = int(_ymag)+1;
qreal x = qreal(r.x());
qreal y = 0.0;
qreal h = (r.height()+d) / _ymag;
QPointF offset(x, _ypos / _ymag + keyHeight * 2 + y);
p.scale(1.0, _ymag);
p.drawTiledPixmap(QRectF(x, y, qreal(r.width()), h), *octave, offset);
if (curPitch != -1) {
int y = pitch2y(curPitch);
QPixmap* pm;
switch(curPitch % 12) {
case 0:
case 5:
pm = mk3;
break;
case 2:
case 7:
case 9:
pm = mk2;
break;
case 4:
case 11:
pm = mk1;
break;
default:
pm = mk4;
break;
}
p.drawPixmap(0, y, *pm);
}
}
//---------------------------------------------------------
// setYpos
//---------------------------------------------------------
void Piano::setYpos(int val)
{
if (_ypos != val) {
_ypos = val;
update();
}
}
//---------------------------------------------------------
// setMag
//---------------------------------------------------------
void Piano::setMag(double, double ym)
{
if (_ymag != ym) {
_ymag = ym;
update();
}
}
//---------------------------------------------------------
// setPitch
//---------------------------------------------------------
void Piano::setPitch(int val)
{
if (curPitch != val) {
curPitch = val;
update();
}
}
//---------------------------------------------------------
// mousePressEvent
//---------------------------------------------------------
void Piano::mousePressEvent(QMouseEvent* event)
{
curKeyPressed = y2pitch(event->pos().y());
emit keyPressed(curKeyPressed);
}
//---------------------------------------------------------
// mouseReleaseEvent
//---------------------------------------------------------
void Piano::mouseReleaseEvent(QMouseEvent*)
{
emit keyReleased(curKeyPressed);
curKeyPressed = -1;
}
//---------------------------------------------------------
// mouseMoveEvent
//---------------------------------------------------------
void Piano::mouseMoveEvent(QMouseEvent* event)
{
int pitch = y2pitch(event->pos().y());
if (pitch != curPitch) {
curPitch = pitch;
emit pitchChanged(curPitch);
if ((curKeyPressed != -1) && (curKeyPressed != pitch)) {
emit keyReleased(curKeyPressed);
curKeyPressed = pitch;
emit keyPressed(curKeyPressed);
}
update();
}
}
//---------------------------------------------------------
// leaveEvent
//---------------------------------------------------------
void Piano::leaveEvent(QEvent*)
{
if (curPitch != -1) {
curPitch = -1;
emit pitchChanged(-1);
update();
}
}
//---------------------------------------------------------
// setOrientation
//---------------------------------------------------------
void Piano::setOrientation(PianoOrientation o)
{
_orientation = o;
update();
}