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/* TIATracker, (c) 2016 Andre "Kylearan" Wichmann.
* Website: https://bitbucket.org/kylearan/tiatracker
* Email: andre.wichmann@gmx.de
* See the file "license.txt" for information on usage and redistribution
* of this file.
*/
#include <QPainter>
#include <QMouseEvent>
#include <iostream>
#include "guidekeyboard.h"
#include "mainwindow.h"
// Fixed key traits (black yes/no, position index)
const GuideKeyboard::KeyGfxTrait GuideKeyboard::octaveTraits[] = {
{false, 0}, // C
{true, 1}, // Cis
{false, 1}, // D
{true, 2}, // Dis
{false, 2}, // E
{false, 3}, // F
{true, 4}, // Fis
{false, 4}, // G
{true, 5}, // Gis
{false, 5}, // A
{true, 6}, // Ais
{false, 6} // H
};
GuideKeyboard::GuideKeyboard(QWidget *parent) : QWidget(parent)
{
keyFont.setPixelSize(keyFontSize);
QFontMetrics fontMetrics(keyFont);
keyFontHeight = fontMetrics.height();
keyInfoRectHeight = keyFontHeight;
setFixedWidth(keyboardWidth+1);
setFixedHeight(keyboardHeight+1);
for (int i = 0; i < numKeys; ++i) {
keyInfo[i].isEnabled = false;
keyInfo[i].frequency = -1;
}
}
/*************************************************************************/
void GuideKeyboard::setInstrumentPitchGuide(TiaSound::InstrumentPitchGuide *pitchGuide, int threshold) {
offThreshold = threshold;
removeGuide();
for (int freq = 0; freq < pitchGuide->getNumFrequencies(); ++freq) {
TiaSound::Note note = pitchGuide->getNote(freq);
if (note != TiaSound::Note::NotANote) {
int iNote = TiaSound::getIntFromNote(note);
keyInfo[iNote].frequency = freq;
keyInfo[iNote].off = pitchGuide->getPercentOff(freq);
}
}
}
/*************************************************************************/
void GuideKeyboard::removeGuide() {
for (int i = 0; i < numKeys; ++i) {
keyInfo[i].frequency = -1;
}
}
/*************************************************************************/
void GuideKeyboard::paintEvent(QPaintEvent *) {
QPainter painter(this);
// White keys
painter.setPen(MainWindow::dark);
for (int key = 0; key < numKeys; ++key) {
if (!octaveTraits[key%numKeysPerOctave].isBlack) {
const int xPos = calcWhiteKeyXPos(key);
if (keyInfo[key].isEnabled) {
painter.fillRect(xPos, 0, keyWidth, keyHeight, MainWindow::violet);
} else {
painter.fillRect(xPos, 0, keyWidth, keyHeight, MainWindow::light);
}
painter.drawRect(xPos, 0, keyWidth, keyHeight);
}
}
// Octave number hints
painter.setFont(keyFont);
painter.setPen(MainWindow::contentDark);
keyFont.setBold(false);
for (int octave = 0; octave < numOctaves; ++octave) {
const int xPos = octave*numWhiteKeysPerOctave*keyWidth - 2;
const int yPos = keyHeight/2 - 4*keyFontHeight;
painter.drawText(xPos, yPos, keyWidth, keyFontHeight, Qt::AlignHCenter, QString::number(octave + 1));
}
keyFont.setBold(false);
painter.setFont(keyFont);
// Black keys
for (int key = 0; key < numKeys; ++key) {
if (octaveTraits[key%numKeysPerOctave].isBlack) {
const int xPos = calcBlackKeyXPos(key);
// First draw black frame, then colored interior
painter.fillRect(xPos, 0, blackKeyWidth, blackKeyHeight, MainWindow::darkHighlighted);
if (keyInfo[key].isEnabled) {
painter.fillRect(xPos + 1, 1, blackKeyWidth - 2, blackKeyHeight - 2, MainWindow::violet);
} else {
painter.fillRect(xPos + 1, 1, blackKeyWidth - 2, blackKeyHeight - 2, MainWindow::darkHighlighted);
}
}
}
// Note labels and hints
painter.setFont(keyFont);
for (int key = 0; key < numKeys; ++key) {
int xPos;
int rectWidth;
int rectHeight;
if (octaveTraits[key%numKeysPerOctave].isBlack) {
painter.setPen(MainWindow::light);
xPos = calcBlackKeyXPos(key);
rectWidth = blackKeyWidth;
rectHeight = blackKeyHeight;
} else {
painter.setPen(MainWindow::dark);
xPos = calcWhiteKeyXPos(key);
rectWidth = keyWidth;
rectHeight = keyHeight;
}
if (keyInfo[key].frequency != -1) {
if (std::abs(keyInfo[key].off) >= std::abs(offThreshold)) {
painter.setPen(MainWindow::red);
}
painter.drawText(xPos, rectHeight - 3*keyInfoRectHeight, rectWidth, keyInfoRectHeight, Qt::AlignHCenter|Qt::AlignBottom, QString::number(keyInfo[key].frequency));
painter.drawText(xPos, rectHeight - 2*keyInfoRectHeight, rectWidth, keyInfoRectHeight, Qt::AlignHCenter|Qt::AlignBottom, QString::number(keyInfo[key].off));
}
TiaSound::Note curNote = TiaSound::getNoteFromInt(key);
painter.drawText(xPos, rectHeight - 1*keyInfoRectHeight, rectWidth, keyInfoRectHeight, Qt::AlignHCenter|Qt::AlignBottom, TiaSound::getNoteName(curNote));
}
}
/*************************************************************************/
void GuideKeyboard::mousePressEvent(QMouseEvent *event) {
int octave = int(event->x()/(keyWidth*numWhiteKeysPerOctave));
int keyIndex;
if (event->y() < blackKeyHeight) {
// Potential black key
// TODO: More intelligent calculation instead of brute force
int octaveBaseKey = octave*12;
int xPos = event->x();
keyIndex = -1;
for (int key = 0; key < 12; ++key) {
if (octaveTraits[key].isBlack) {
int xPosCandidate = calcBlackKeyXPos(octaveBaseKey + key);
if (xPos >= xPosCandidate && xPos < xPosCandidate + blackKeyWidth) {
keyIndex = octaveBaseKey + key;
}
}
}
if (keyIndex == -1) {
// Click is between black keys: White key instead
keyIndex = calcKeyIndexForWhiteKey(xPos);
}
} else {
// White key
keyIndex = calcKeyIndexForWhiteKey(event->x());
}
keyInfo[keyIndex].isEnabled = !keyInfo[keyIndex].isEnabled;
update();
}
/*************************************************************************/
int GuideKeyboard::calcWhiteKeyXPos(int key) {
int keyInOctave = key%numKeysPerOctave;
int octave = int(key/numKeysPerOctave);
int octaveXPos = octave*keyWidth*numWhiteKeysPerOctave;
return octaveXPos + octaveTraits[keyInOctave].posIndex*keyWidth;
}
/*************************************************************************/
int GuideKeyboard::calcBlackKeyXPos(int key) {
int keyInOctave = key%numKeysPerOctave;
int octave = int(key/numKeysPerOctave);
int octaveXPos = octave*keyWidth*numWhiteKeysPerOctave;
return octaveXPos + octaveTraits[keyInOctave].posIndex*keyWidth - blackKeyWidth/2;
}
/*************************************************************************/
int GuideKeyboard::calcKeyIndexForWhiteKey(int xPos) {
// Maps index of a white key to overall key index including black keys,
// which for example can be used with octaveTraits[].
static const int whiteKeyIndexToKeyIndex[] = {0, 2, 4, 5, 7, 9, 11};
int octave = int(xPos/(keyWidth*numWhiteKeysPerOctave));
int xPosInOctave = xPos%(keyWidth*numWhiteKeysPerOctave);
int whiteKeyIndex = int(xPosInOctave/keyWidth);
int keyIndex = octave*12 + whiteKeyIndexToKeyIndex[whiteKeyIndex];
return keyIndex;
}
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