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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <qwidget.h>
#include <qstring.h>
#include <qpainter.h>
#include <qpen.h>
#include <qpixmap.h>
#include <qbrush.h>
#include <qsizepolicy.h>
#include <qsize.h>
#include "envelope.h"
Envelope::Envelope(float *p_delayRef, float *p_attackRef, float *p_holdRef,
float *p_decayRef, float *p_sustainRef, float *p_releaseRef,
QWidget* parent, const char *name, SynthData *p_synthdata)
: QWidget (parent, name)
{
synthdata = p_synthdata;
delayRef = p_delayRef;
attackRef = p_attackRef;
holdRef = p_holdRef;
decayRef = p_decayRef;
sustainRef = p_sustainRef;
releaseRef = p_releaseRef;
setPalette(QPalette(QColor(0, 20, 100), QColor(0, 20, 100)));
setMinimumHeight(140);
}
Envelope::~Envelope()
{
}
void Envelope::paintEvent(QPaintEvent *) {
QPixmap pm(width(), height());
QPainter p(&pm);
QPointArray points(7);
QPen pen;
float len, x, y, xscale, yscale;
pm.fill(QColor(10, 50, 10));
p.setViewport(0, 0, width(), height());
p.setWindow(0, 0, width(), height());
len = *delayRef + *attackRef + *holdRef + *decayRef + SUSTAIN_LEN + *releaseRef;
xscale = (float)width() / len;
yscale = (float)(height()-6);
x = *delayRef * xscale;
points.setPoint(0, (int)x, height());
x += *attackRef * xscale;
points.setPoint(1, (int)x, 6);
x += *holdRef * xscale;
points.setPoint(2, (int)x, 6);
x += *decayRef * xscale;
y = *sustainRef * yscale;
points.setPoint(3, (int)x, height() - (int)y);
x += SUSTAIN_LEN * xscale;
points.setPoint(4, (int)x, height() - (int)y);
x += *releaseRef * xscale;
points.setPoint(5, (int)x, height() - 1);
x = *delayRef * xscale;
points.setPoint(6, (int)x, height() - 1);
p.setBrush(QBrush(QColor(10, 80, 10)));
p.drawPolygon(points);
pen.setColor(QColor(10, 110, 10));
pen.setWidth(3);
p.setPen(pen);
p.drawPolyline(points);
pen.setColor(QColor(20, 160, 20));
pen.setWidth(1);
p.setPen(pen);
p.drawPolyline(points);
bitBlt(this, 0, 0, &pm);
}
void Envelope::updateEnvelope(int value) {
repaint(false);
}
QSize Envelope::sizeHint() const {
return QSize(ENVELOPE_MINIMUM_WIDTH, ENVELOPE_MINIMUM_HEIGHT);
}
QSizePolicy Envelope::sizePolicy() const {
return QSizePolicy( QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
}
void Envelope::resizeEvent (QResizeEvent* )
{
repaint(true);
}
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