/** Draw the crossfader curve graph. Only needs to get drawn when a change has been made.*/
void DlgPrefCrossfader::drawXfaderDisplay()
{
#define GRID_X_LINES 4
#define GRID_Y_LINES 6
int sizeX = graphicsViewXfader->width();
int sizeY = graphicsViewXfader->height();
//Initialize Scene
if (m_pxfScene) {
delete m_pxfScene;
m_pxfScene = NULL;
}
m_pxfScene = new QGraphicsScene();
m_pxfScene->setSceneRect(0,0,sizeX, sizeY);
m_pxfScene->setBackgroundBrush(Qt::black);
//Initialize QPens
QPen gridPen(Qt::green);
QPen graphLinePen(Qt::white);
//draw grid
for (int i=1; i < GRID_X_LINES; i++) {
m_pxfScene->addLine(QLineF(0, i *(sizeY/GRID_X_LINES),sizeX,i *(sizeY/GRID_X_LINES)), gridPen);
}
for (int i=1; i < GRID_Y_LINES; i++) {
m_pxfScene->addLine(QLineF( i * (sizeX/GRID_Y_LINES), 0, i * (sizeX/GRID_Y_LINES), sizeY), gridPen);
}
// Draw graph lines
float gain1, gain2;
QPoint pointTotal, point1, point2;
QPoint pointTotalPrev, point1Prev, point2Prev;
for (int i = 0; i < sizeX; i++) {
double xfadeStep = 2. / (double)sizeX;
EngineXfader::getXfadeGains(gain1, gain2, (-1. + (xfadeStep * (double) i)),
m_transform, m_cal,
(m_xFaderMode == MIXXX_XFADER_CONSTPWR),
checkBoxReverse->isChecked());
double sum = gain1 + gain2;
//scale for graph
gain1 *= 0.80;
gain2 *= 0.80;
sum *= 0.80;
//draw it
pointTotalPrev = pointTotal;
point1Prev = point1;
point2Prev = point2;
pointTotal = QPoint(i - 2, (int)((1. - sum) * (sizeY)));
point1 = QPoint(i - 2, (int)((1. - gain1) * (sizeY)));
point2 = QPoint(i - 2, (int)((1. - gain2) * (sizeY)));
if(i == 0) {
pointTotalPrev = pointTotal;
point1Prev = point1;
point2Prev = point2;
}
if(pointTotal != point1)
m_pxfScene->addLine(QLineF(point1, point1Prev), graphLinePen);
if(pointTotal != point2)
m_pxfScene->addLine(QLineF(point2, point2Prev), graphLinePen);
m_pxfScene->addLine(QLineF(pointTotal, pointTotalPrev), QPen(Qt::red));
}
graphicsViewXfader->setScene(m_pxfScene);
graphicsViewXfader->show();
}
// Draw the crossfader curve graph. Only needs to get drawn when a change
// has been made.
void DlgPrefCrossfader::drawXfaderDisplay()
{
const int kGrindXLines = 4;
const int kGrindYLines = 6;
int sizeX = graphicsViewXfader->width();
int sizeY = graphicsViewXfader->height();
// Initialize Scene
if (m_pxfScene) {
delete m_pxfScene;
m_pxfScene = NULL;
}
m_pxfScene = new QGraphicsScene();
m_pxfScene->setSceneRect(0,0,sizeX, sizeY);
m_pxfScene->setBackgroundBrush(Qt::black);
// Initialize QPens
QPen gridPen(Qt::green);
QPen graphLinePen(Qt::white);
// draw grid
for (int i = 1; i < kGrindXLines; i++) {
m_pxfScene->addLine(
QLineF(0, i * (sizeY / kGrindXLines), sizeX,
i * (sizeY / kGrindXLines)), gridPen);
}
for (int i = 1; i < kGrindYLines; i++) {
m_pxfScene->addLine(
QLineF(i * (sizeX / kGrindYLines), 0,
i * (sizeX / kGrindYLines), sizeY), gridPen);
}
// Draw graph lines
QPointF pointTotal, point1, point2;
QPointF pointTotalPrev, point1Prev, point2Prev;
int pointCount = sizeX - 4;
// reduced by 2 x 1 for border + 2 x 1 for inner distance to border
double xfadeStep = 2. / (pointCount - 1);
for (int i = 0; i < pointCount; i++) {
double gain1, gain2;
EngineXfader::getXfadeGains((-1. + (xfadeStep * i)),
m_transform, m_cal,
m_xFaderMode,
checkBoxReverse->isChecked(),
&gain1, &gain2);
double gain = sqrt(gain1 * gain1 + gain2 * gain2);
// scale for graph
gain1 *= 0.71;
gain2 *= 0.71;
gain *= 0.71;
// draw it
pointTotal = QPointF(i + 1, (1. - gain) * (sizeY) - 3);
point1 = QPointF(i + 1, (1. - gain1) * (sizeY) - 3);
point2 = QPointF(i + 1, (1. - gain2) * (sizeY) - 3);
if (i > 0) {
m_pxfScene->addLine(QLineF(pointTotal, pointTotalPrev), QPen(Qt::red));
m_pxfScene->addLine(QLineF(point1, point1Prev), graphLinePen);
m_pxfScene->addLine(QLineF(point2, point2Prev), graphLinePen);
}
// Save old values
pointTotalPrev = pointTotal;
point1Prev = point1;
point2Prev = point2;
}
graphicsViewXfader->setScene(m_pxfScene);
graphicsViewXfader->show();
graphicsViewXfader->repaint();
}
