/*
* Musical Skill Coach - An interactive midi device friendly program to help music students improve their skills
* Copyright (C) 2011 Paul-Emile Gaudet
*
* 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 3 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
package music.ui.instruments;
import java.awt.*;
import java.awt.event.MouseEvent;
import javax.sound.midi.InvalidMidiDataException;
import javax.sound.midi.ShortMessage;
public class PianoKeyCanvas extends BasicInstrumentCanvas
{
/**
*
*/
private static final long serialVersionUID = 1L;
protected static final int [] DRAW_PROFILE =
{ 0, 1, 2, 1, 3, 0, 1, 4, 1, 5, 1, 3 };
protected static final int [] DRAW_COLOUR =
{ 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0 };
public static final int KEYBOARD_LAYOUT_88KEYS = 0;
public static final int KEYBOARD_LAYOUT_61KEYS = 1;
public static final int KEYBOARD_LAYOUT_41KEYS = 2;
protected static final double [][] PROFILE_RATIOS =
{
{ 0.00, 1.0, 0.0, 1.714 }, // C
{ 0.00, 1.0, 0.00, 0.00 }, // C#
{ 0.00, 1.0, -0.286, 1.286 }, // D
{ 0.00, 1.0, -0.714, 1.0 }, // E
{ 0.00, 1.0, -0.286, 1.50 }, // G
{ 0.00, 1.0, -0.50, 1.286 }, // A
{ 0.00, 1.0, 0.0, 1.286 }, // A as the left key, for 88 keys
{ 0.00, 1.714, 0.0, 1.714 }, // C as the right key, for 88 keys
{ 0.00, 1.0, -0.5, 1.0 } // E as the right key, for 41 keys
};
protected static final int [][] LAYOUT_PROFILES =
{
{ 88, 9, 6, 7, 21 },
{ 61, 0, -1, 7, 36 },
{ 41, 5, -1, 8, 41 } };
protected int keys;
protected int midiLeftNoteKey;
protected int leftKeyNote;
protected int leftKeyProfileOverride;
protected int rightKeyProfileOverride;
protected int keySplitHeight;
protected int [] topHalfKeyMarkers;
protected int [] bottomHalfKeyMarkers;
protected int [] notes;
protected int keyPosition;
protected int clickNote;
public PianoKeyCanvas()
{
super();
keySplitHeight = 0;
topHalfKeyMarkers = new int[128];
bottomHalfKeyMarkers = new int[128];
notes = new int[128];
setInstrumentType(KEYBOARD_LAYOUT_61KEYS);
}
@Override
public void setInstrumentType(int instrumentType)
{
if ((instrumentType < KEYBOARD_LAYOUT_88KEYS) || (instrumentType > KEYBOARD_LAYOUT_41KEYS))
return;
keys = LAYOUT_PROFILES[instrumentType][0];
leftKeyNote = LAYOUT_PROFILES[instrumentType][1];
leftKeyProfileOverride = LAYOUT_PROFILES[instrumentType][2];
rightKeyProfileOverride = LAYOUT_PROFILES[instrumentType][3];
midiLeftNoteKey = LAYOUT_PROFILES[instrumentType][4];
}
public void paint(Graphics g)
{
Graphics2D g2 = (Graphics2D) g;
Dimension d = getSize();
g2.setBackground(Color.GRAY);
g2.clearRect(0, 0, d.width, d.height);
double keySpace = (double) d.width / (double) (keys + 1);
int keyLeftEdge = 0;
int profile;
int drawProfile;
int topLeft, topRight, bottomLeft, bottomRight;
int i;
keySplitHeight = d.height * 2 / 3;
for (i = 0; i < keys; i++)
{
profile = (i + leftKeyNote) % DRAW_PROFILE.length;
if (i + midiLeftNoteKey == keyPosition)
{
g2.setColor(Color.RED);
}
else if (notes[i + midiLeftNoteKey] == 1)
{
g2.setColor(Color.BLUE);
}
else if (i + midiLeftNoteKey == 60)
{
g2.setColor(Color.YELLOW);
}
else
{
switch (DRAW_COLOUR[profile])
{
case 0:
g2.setColor(Color.WHITE);
break;
case 1:
g2.setColor(Color.BLACK);
break;
}
}
drawProfile = DRAW_PROFILE[profile];
if ((i == 0) && (leftKeyProfileOverride >= 0))
drawProfile = leftKeyProfileOverride;
if ((i == keys - 1) && (rightKeyProfileOverride >= 0))
drawProfile = rightKeyProfileOverride;
topLeft = (int) ((double) (keySpace) * PROFILE_RATIOS[drawProfile][0]) + keyLeftEdge;
topRight = (int) ((double) (keySpace) * PROFILE_RATIOS[drawProfile][1]) + keyLeftEdge;
bottomLeft = (int) ((double) (keySpace) * PROFILE_RATIOS[drawProfile][2]) + keyLeftEdge;
bottomRight = (int) ((double) (keySpace) * PROFILE_RATIOS[drawProfile][3]) + keyLeftEdge;
topHalfKeyMarkers[i] = topLeft;
bottomHalfKeyMarkers[i] = bottomLeft;
topLeft++;
topRight--;
bottomLeft++;
bottomRight--;
if (PROFILE_RATIOS[drawProfile][2] == PROFILE_RATIOS[drawProfile][3])
{
g2.fillRect(topLeft, 0, topRight - topLeft, d.height * 2 / 3);
bottomHalfKeyMarkers[i] = -1;
}
else
{
g2.fillRect(topLeft, 0, topRight - topLeft, d.height);
g2.fillRect(bottomLeft, d.height * 2 / 3 + 2, bottomRight - bottomLeft, d.height - (d.height * 2 / 3) - 2);
}
keyLeftEdge = (int) ((double) (i + 1) * keySpace);
}
for (; i < bottomHalfKeyMarkers.length; i++)
{
topHalfKeyMarkers[i] = bottomHalfKeyMarkers[i] = -1;
}
}
protected void locateKey(MouseEvent e)
{
Point p = e.getPoint();
if (p.y < keySplitHeight)
{
for (keyPosition = 0; keyPosition < keys; keyPosition++)
{
if (p.x < topHalfKeyMarkers[keyPosition])
{
if (keyPosition > 0)
keyPosition--;
break;
}
}
}
else
{
for (keyPosition = 0; keyPosition < keys; keyPosition++)
{
if (p.x < bottomHalfKeyMarkers[keyPosition])
{
if (keyPosition > 0)
keyPosition--;
while ((keyPosition > 0) && (bottomHalfKeyMarkers[keyPosition] == -1))
keyPosition--;
break;
}
}
}
if (keyPosition >= keys)
keyPosition = keys - 1;
keyPosition += midiLeftNoteKey;
}
@Override
public void mouseExited(MouseEvent e)
{
keyPosition = -1;
repaint();
}
@Override
public void mousePressed(MouseEvent e)
{
locateKey(e);
if ((keyPosition >= 0) && (keyPosition < notes.length))
{
notes[keyPosition] = 1;
clickNote = keyPosition;
}
if ((midiTrans != null) && (keyPosition > 0))
{
midiTrans.addNote(0, keyPosition, 0x60, 100);
}
ShortMessage midiMessage = new ShortMessage();
if (midiRec != null)
{
try
{
midiMessage.setMessage(ShortMessage.NOTE_ON, 0, keyPosition, 0x60);
midiRec.send(midiMessage, 0);
}
catch (InvalidMidiDataException e1)
{
}
}
}
public void getKeyEvent(int keyCharacter)
{
}
@Override
public void mouseReleased(MouseEvent e)
{
locateKey(e);
if ((clickNote >= 0) && (clickNote < notes.length))
{
notes[clickNote] = 0;
}
clickNote = -1;
}
@Override
public void mouseMoved(MouseEvent e)
{
int lastKey = keyPosition;
locateKey(e);
if (lastKey != keyPosition)
{
// invalidate();
repaint();
}
}
protected void gotMidiEvent(int midiKey, int pressure)
{
keyPosition = midiKey;
if ((keyPosition >= 0) && (keyPosition < notes.length))
{
if (pressure == 0)
notes[keyPosition] = 0;
else
notes[keyPosition] = 1;
}
keyPosition = -1;
repaint();
}
}