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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 "envelopeshaper.h"
#include <QPainter>
#include "mainwindow.h"
#include <cassert>
#include <QMouseEvent>
#include <iostream>
EnvelopeShaper::EnvelopeShaper(QWidget *parent) : QWidget(parent)
{
setFixedWidth(calcWidth());
setFixedHeight(widgetHeight);
legendFont.setPixelSize(legendNameSize);
QFontMetrics fontMetrics(legendFont);
nameFontHeight = fontMetrics.height();
}
/*************************************************************************/
void EnvelopeShaper::registerInstrument(Track::Instrument *newInstrument) {
pInstrument = newInstrument;
}
/*************************************************************************/
void EnvelopeShaper::setScale(int min, int max) {
scaleMin = min;
scaleMax = max;
cellHeight = int( (widgetHeight - legendCellSize)/(max - min + 1) );
}
/*************************************************************************/
void EnvelopeShaper::drawLegend(QPainter &painter,
const int valuesXPos, const int valuesHeight) {
int envelopeLength = pInstrument->getEnvelopeLength();
// Left side
painter.fillRect(0, 0, legendCellSize, widgetHeight, MainWindow::lightHighlighted);
// Bottom
painter.fillRect(valuesXPos, widgetHeight - legendCellSize, envelopeLength*cellWidth, legendCellSize, MainWindow::lightHighlighted);
// Name
painter.setPen(MainWindow::contentDarker);
legendFont.setBold(false);
legendFont.setPixelSize(legendNameSize);
painter.setFont(legendFont);
painter.save();
painter.rotate(-90);
int nameLength = painter.fontMetrics().width(name);
painter.drawText(0-(valuesHeight - nameLength)/2 - nameLength, 16, name);
painter.restore();
// Scale
legendFont.setBold(false);
legendFont.setPixelSize(legendScaleSize);
painter.setFont(legendFont);
int min = scaleMin;
int max = scaleMax;
if (isInverted) {
min = scaleMax;
max = scaleMin;
}
painter.drawText(0, 0, legendCellSize, nameFontHeight, Qt::AlignCenter, QString::number(max));
painter.drawText(0, valuesHeight - nameFontHeight, legendCellSize, nameFontHeight, Qt::AlignCenter, QString::number(min));
// Frame numbers
for (int frame = 0; frame < envelopeLength; ++frame) {
int xPos = legendCellSize + frame*cellWidth;
painter.drawText(xPos, valuesHeight, cellWidth, legendCellSize, Qt::AlignCenter, QString::number(frame + 1));
}
}
void EnvelopeShaper::drawAttackDecay(QPainter &painter,
const int valuesXPos, const int valuesHeight) {
int envelopeLength = pInstrument->getEnvelopeLength();
int sustainStart = pInstrument->getSustainStart();
int releaseStart = pInstrument->getReleaseStart();
// Attack/Decay
painter.fillRect(valuesXPos, 0, sustainStart*cellWidth, valuesHeight, MainWindow::dark);
// Sustain
painter.fillRect(valuesXPos + sustainStart*cellWidth, 0, (releaseStart - sustainStart)*cellWidth, valuesHeight, MainWindow::darkHighlighted);
// Release
painter.fillRect(valuesXPos + releaseStart*cellWidth, 0, (envelopeLength - releaseStart)*cellWidth, valuesHeight, MainWindow::dark);
}
void EnvelopeShaper::drawWaveform(QPainter &painter, const int valuesXPos) {
int envelopeLength = pInstrument->getEnvelopeLength();
// Value numbers
painter.setPen(MainWindow::contentLight);
for (int iValue = 0; iValue < envelopeLength; ++iValue) {
int value = (*values)[iValue];
painter.drawText(valuesXPos + iValue*cellWidth, 0, cellWidth, legendCellSize, Qt::AlignCenter, QString::number(value));
}
// Value circles
painter.setPen(MainWindow::contentLight);
for (int i = 0; i < envelopeLength; ++i) {
int xPos = int(valuesXPos + i*cellWidth + cellWidth/2);
int deviceValue = scaleMax - (*values)[i];
if (isInverted) {
deviceValue = scaleMax - scaleMin - deviceValue;
}
int yPos = int(deviceValue*cellHeight + cellHeight/2);
painter.drawEllipse(xPos - valueCircleRadius, yPos - valueCircleRadius, 2*valueCircleRadius - 1, 2*valueCircleRadius - 1);
}
// Value lines
painter.setPen(QPen(MainWindow::blue, 2, Qt::SolidLine, Qt::SquareCap, Qt::BevelJoin));
for (int i = 1; i < envelopeLength; ++i) {
int fromX = int(valuesXPos + (i - 1)*cellWidth + cellWidth/2);
int deviceValueFrom = scaleMax - (*values)[i - 1];
if (isInverted) {
deviceValueFrom = scaleMax - scaleMin - deviceValueFrom;
}
int fromY = int(deviceValueFrom*cellHeight + cellHeight/2);
int toX = int(valuesXPos + i*cellWidth + cellWidth/2);
int deviceValueTo = scaleMax - (*values)[i];
if (isInverted) {
deviceValueTo = scaleMax - scaleMin - deviceValueTo;
}
int toY = int(deviceValueTo*cellHeight + cellHeight/2);
painter.drawLine(fromX, fromY, toX, toY);
}
}
void EnvelopeShaper::paintEvent(QPaintEvent *) {
QPainter painter(this);
const int valuesXPos = legendCellSize;
const int valuesHeight = widgetHeight - legendCellSize;
drawLegend(painter, valuesXPos, valuesHeight);
drawAttackDecay(painter, valuesXPos, valuesHeight);
/* Waveform */
drawWaveform(painter, valuesXPos);
}
/*************************************************************************/
void EnvelopeShaper::processMouseEvent(int x, int y) {
x -= legendCellSize;
if (x >= 0 && y >= 0) {
// Click was inside the graph
int iValue = int(x/cellWidth);
int newValue = scaleMax - int(y/cellHeight);
// If we're dragging already, use that index instead
if (draggingIndex != -1) {
iValue = draggingIndex;
}
// Sanity check in case area is some pixels bigger than graph area
if (iValue >=0 && iValue < pInstrument->getEnvelopeLength()
&& newValue >= scaleMin && newValue <= scaleMax) {
if (isInverted) {
newValue = scaleMin + scaleMax - newValue;
}
(*values)[iValue] = newValue;
draggingIndex = iValue;
update();
}
}
}
void EnvelopeShaper::mousePressEvent(QMouseEvent *event) {
if (event->button() == Qt::LeftButton) {
isMouseDragging = true;
processMouseEvent(event->x(), event->y());
}
}
void EnvelopeShaper::mouseReleaseEvent(QMouseEvent *) {
isMouseDragging = false;
draggingIndex = -1;
int newMax = pInstrument->getMaxVolume();
emit newMaxValue(newMax);
}
void EnvelopeShaper::mouseMoveEvent(QMouseEvent *event) {
if (isMouseDragging) {
processMouseEvent(event->x(), event->y());
}
}
/*************************************************************************/
void EnvelopeShaper::contextMenuEvent(QContextMenuEvent *event) {
int valueAreaHeight = widgetHeight - legendCellSize;
if (event->x() >= legendCellSize && event->y() < valueAreaHeight) {
int frame = (event->x() - legendCellSize)/cellWidth;
emit envelopeContextEvent(frame);
contextMenu->exec(event->globalPos());
}
}
/*************************************************************************/
int EnvelopeShaper::calcWidth() {
int envelopeLength = 2;
// During init, no instrument is registered yet
if (pInstrument != nullptr) {
envelopeLength = pInstrument->getEnvelopeLength();
}
int width = legendCellSize;
if (values != nullptr) {
width += envelopeLength*cellWidth;
}
return width;
}
/*************************************************************************/
void EnvelopeShaper::updateSize() {
setFixedWidth(calcWidth());
}
/*************************************************************************/
QList<int>* EnvelopeShaper::getValues() {
return values;
}
void EnvelopeShaper::setValues(QList<int> *newValues) {
values = newValues;
updateSize();
}
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