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/***************************************************************************
BandPassDialog.cpp - dialog for the "band_pass" plugin
-------------------
begin : Tue Jun 24 2003
copyright : (C) 2003 by Dave Flogeras
email : d.flogeras@unb.ca
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "config.h"
#include <math.h>
#include <new>
#include <QPainter>
#include <QPushButton>
#include <QRadioButton>
#include <QSlider>
#include <QSpinBox>
#include <QWidget>
#include <KHelpClient>
#include <KLocalizedString>
#include "libkwave/String.h"
#include "libkwave/Utils.h"
#include "libgui/FrequencyResponseWidget.h"
#include "libgui/ScaleWidget.h"
#include "BandPass.h"
#include "BandPassDialog.h"
//***************************************************************************
Kwave::BandPassDialog::BandPassDialog(QWidget *parent, double sample_rate)
:QDialog(parent), Kwave::PluginSetupDialog(), Ui::BandPassDlg(),
m_frequency(3500),m_bw(100),
m_sample_rate(sample_rate), m_filter(nullptr)
{
setupUi(this);
setModal(true);
// set maximum frequency to sample rate / 2
double f_max = sample_rate / 2.0;
slider->setMaximum(Kwave::toInt(f_max));
slider_2->setMaximum(Kwave::toInt(f_max / 2.0));
spinbox->setMaximum(Kwave::toInt(f_max));
spinbox_2->setMaximum(Kwave::toInt(f_max / 2.0));
// initialize the frequency scale widget
scale_freq->setMinMax(0, Kwave::toInt(f_max));
scale_freq->setLogMode(false);
scale_freq->setUnit(i18n("Hz"));
// initialize the attenuation scale widget
scale_db->setMinMax(-24, +6);
scale_db->setLogMode(false);
scale_db->setUnit(i18n("dB"));
// initialize the frequency response widget
freq_response->init(f_max, -24, +6);
// set up the low pass filter function
m_filter = new(std::nothrow) Kwave::BandPass();
Q_ASSERT(m_filter);
if (!m_filter) return;
freq_response->setFilter(m_filter);
// initialize the controls and the curve display
slider->setValue(Kwave::toInt(m_frequency));
spinbox->setValue(Kwave::toInt(m_frequency));
slider_2->setValue(Kwave::toInt(m_bw));
spinbox_2->setValue(Kwave::toInt(m_bw));
updateDisplay();
// changes in the slider or spinbox
connect(spinbox, SIGNAL(valueChanged(int)),
this, SLOT(freqValueChanged(int)));
connect(spinbox_2, SIGNAL(valueChanged(int)),
this, SLOT(bwValueChanged(int)));
// click to the "Listen" button
connect(btListen, SIGNAL(toggled(bool)),
this, SLOT(listenToggled(bool)));
// expand the "Listen" button to it's maximum width
listenToggled(true);
if (btListen->width() > btListen->minimumWidth())
btListen->setMinimumWidth(btListen->width());
listenToggled(false);
if (btListen->width() > btListen->minimumWidth())
btListen->setMinimumWidth(btListen->width());
// set the initial size of the dialog
int h = (width() * 3) / 5;
if (height() < h) resize(width(), h);
int w = (height() * 5) / 3;
if (width() < w) resize(w, height());
connect(buttonBox_Help->button(QDialogButtonBox::Help), SIGNAL(clicked()),
this, SLOT(invokeHelp()));
// set the focus onto the "OK" button
buttonBox->button(QDialogButtonBox::Ok)->setFocus();
}
//***************************************************************************
Kwave::BandPassDialog::~BandPassDialog()
{
// better stop pre-listen now
listenToggled(false);
if (freq_response) freq_response->setFilter(nullptr);
delete m_filter;
}
//***************************************************************************
void Kwave::BandPassDialog::freqValueChanged(int pos)
{
if (Kwave::toInt(m_frequency) != pos) {
m_frequency = pos;
updateDisplay();
emit freqChanged(m_frequency);
}
}
//***************************************************************************
void Kwave::BandPassDialog::bwValueChanged(int pos)
{
if (Kwave::toInt(m_bw) != pos) {
m_bw = pos;
updateDisplay();
emit bwChanged(m_bw);
}
}
//***************************************************************************
QStringList Kwave::BandPassDialog::params()
{
QStringList list;
list << QString::number(m_frequency);
list << QString::number(m_bw);
return list;
}
//***************************************************************************
void Kwave::BandPassDialog::setParams(QStringList ¶ms)
{
// evaluate the parameter list
bool ok;
double frequency = params[0].toDouble(&ok);
Q_ASSERT(ok);
if (ok) m_frequency = frequency;
double bw = params[1].toDouble(&ok);
Q_ASSERT(ok);
if (ok) m_bw = bw;
slider->setValue(Kwave::toInt(m_frequency));
spinbox->setValue(Kwave::toInt(m_frequency));
slider_2->setValue(Kwave::toInt(m_bw));
spinbox_2->setValue(Kwave::toInt(m_bw));
updateDisplay();
}
//***************************************************************************
void Kwave::BandPassDialog::updateDisplay()
{
double fs = m_sample_rate;
if (m_filter && (fs > 0.0))
{
m_filter->setFrequency(QVariant(2.0 * M_PI * m_frequency / fs));
m_filter->setBandwidth(QVariant(2.0 * M_PI * m_bw / fs));
if (freq_response) freq_response->repaint();
}
}
//***************************************************************************
void Kwave::BandPassDialog::listenToggled(bool listen)
{
Q_ASSERT(btListen);
if (!btListen) return;
if (listen) {
// start pre-listen mode
emit startPreListen();
btListen->setText(i18n("&Stop"));
} else {
// stop pre-listen mode
emit stopPreListen();
btListen->setText(i18n("&Listen"));
}
}
//***************************************************************************
void Kwave::BandPassDialog::listenStopped()
{
if (btListen) btListen->setChecked(false);
}
//***************************************************************************
void Kwave::BandPassDialog::invokeHelp()
{
KHelpClient::invokeHelp(_("plugin_sect_band_pass"));
}
//***************************************************************************
//***************************************************************************
#include "moc_BandPassDialog.cpp"
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