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#include <QtDebug>
#include "preferences/dialog/dlgprefcrossfader.h"
#include "engine/enginefilterbessel4.h"
#include "controlobject.h"
#include "engine/enginexfader.h"
#include "util/rescaler.h"
DlgPrefCrossfader::DlgPrefCrossfader(
QWidget* parent, ConfigObject<ConfigValue>* config)
: DlgPreferencePage(parent),
m_config(config),
m_pxfScene(NULL),
m_xFaderMode(MIXXX_XFADER_ADDITIVE),
m_transform(EngineXfader::kTransformMin),
m_cal(0.0),
m_mode(EngineXfader::kXfaderConfigKey, "xFaderMode"),
m_curve(EngineXfader::kXfaderConfigKey, "xFaderCurve"),
m_calibration(EngineXfader::kXfaderConfigKey, "xFaderCalibration"),
m_reverse(EngineXfader::kXfaderConfigKey, "xFaderReverse"),
m_crossfader("[Master]", "crossfader"),
m_xFaderReverse(false) {
setupUi(this);
QButtonGroup crossfaderModes;
crossfaderModes.addButton(radioButtonAdditive);
crossfaderModes.addButton(radioButtonConstantPower);
loadSettings();
connect(SliderXFader, SIGNAL(valueChanged(int)), this,
SLOT(slotUpdateXFader()));
connect(SliderXFader, SIGNAL(sliderMoved(int)), this,
SLOT(slotUpdateXFader()));
connect(SliderXFader, SIGNAL(sliderReleased()), this,
SLOT(slotUpdateXFader()));
connect(SliderXFader, SIGNAL(sliderReleased()), this,
SLOT(slotApply()));
// Update the crossfader curve graph and other settings when the
// crossfader mode is changed.
connect(radioButtonAdditive, SIGNAL(clicked(bool)), this,
SLOT(slotUpdate()));
connect(radioButtonConstantPower, SIGNAL(clicked(bool)), this,
SLOT(slotUpdate()));
}
DlgPrefCrossfader::~DlgPrefCrossfader() {
delete m_pxfScene;
}
// Loads the config keys and sets the widgets in the dialog to match
void DlgPrefCrossfader::loadSettings() {
// Range xFaderCurve EngineXfader::kTransformMin .. EngineXfader::kTransformMax
m_transform = m_config->getValueString(
ConfigKey(EngineXfader::kXfaderConfigKey, "xFaderCurve")).toDouble();
// Range SliderXFader 0 .. 100
double sliderVal = RescalerUtils::oneByXToLinear(
m_transform,
EngineXfader::kTransformMax,
SliderXFader->minimum(),
SliderXFader->maximum());
SliderXFader->setValue(sliderVal);
m_xFaderMode =
m_config->getValueString(ConfigKey(EngineXfader::kXfaderConfigKey, "xFaderMode")).toInt();
if (m_xFaderMode == MIXXX_XFADER_CONSTPWR) {
radioButtonConstantPower->setChecked(true);
} else {
radioButtonAdditive->setChecked(true);
}
m_xFaderReverse = m_config->getValueString(
ConfigKey(EngineXfader::kXfaderConfigKey, "xFaderReverse")).toInt() == 1;
checkBoxReverse->setChecked(m_xFaderReverse);
slotUpdateXFader();
slotApply();
}
// Set the default values for all the widgets
void DlgPrefCrossfader::slotResetToDefaults() {
SliderXFader->setValue(0);
m_xFaderMode = MIXXX_XFADER_ADDITIVE;
radioButtonAdditive->setChecked(true);
checkBoxReverse->setChecked(false);
slotUpdate();
slotApply();
}
// Apply and save any changes made in the dialog
void DlgPrefCrossfader::slotApply() {
m_mode.set(m_xFaderMode);
m_curve.set(m_transform);
m_calibration.set(m_cal);
if (checkBoxReverse->isChecked() != m_xFaderReverse) {
m_reverse.set(checkBoxReverse->isChecked());
double position = m_crossfader.get();
m_crossfader.set(0.0 - position);
m_xFaderReverse = checkBoxReverse->isChecked();
}
slotUpdateXFader();
}
// Update the dialog when the crossfader mode is changed
void DlgPrefCrossfader::slotUpdate() {
if (radioButtonAdditive->isChecked()) {
m_xFaderMode = MIXXX_XFADER_ADDITIVE;
}
if (radioButtonConstantPower->isChecked()) {
m_xFaderMode = MIXXX_XFADER_CONSTPWR;
}
slotUpdateXFader();
}
// 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 == MIXXX_XFADER_CONSTPWR),
checkBoxReverse->isChecked(),
&gain1, &gain2);
double sum = gain1 + gain2;
// scale for graph
gain1 *= 0.80;
gain2 *= 0.80;
sum *= 0.80;
// draw it
pointTotal = QPointF(i + 1, (1. - sum) * (sizeY) - 3);
point1 = QPointF(i + 1, (1. - gain1) * (sizeY) - 3);
point2 = QPointF(i + 1, (1. - gain2) * (sizeY) - 3);
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));
// Save old values
pointTotalPrev = pointTotal;
point1Prev = point1;
point2Prev = point2;
}
graphicsViewXfader->setScene(m_pxfScene);
graphicsViewXfader->show();
}
// Update and save the crossfader's parameters from the dialog's widgets.
void DlgPrefCrossfader::slotUpdateXFader() {
// m_transform is in the range of 1 to 1000 while 50 % slider results
// to ~2, which represents a medium rounded fader curve.
m_transform = RescalerUtils::linearToOneByX(
SliderXFader->value(),
SliderXFader->minimum(),
SliderXFader->maximum(),
EngineXfader::kTransformMax);
m_cal = EngineXfader::getPowerCalibration(m_transform);
m_config->set(ConfigKey(EngineXfader::kXfaderConfigKey, "xFaderMode"),
ConfigValue(m_xFaderMode));
m_config->set(ConfigKey(EngineXfader::kXfaderConfigKey, "xFaderCurve"),
ConfigValue(QString::number(m_transform)));
m_config->set(ConfigKey(EngineXfader::kXfaderConfigKey, "xFaderReverse"),
ConfigValue(checkBoxReverse->isChecked() ? 1 : 0));
drawXfaderDisplay();
}
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