# HG changeset patch
# User Chris Cannam
# Date 1417527024 0
# Node ID 6778a82d6b76455ea928894f108a98bae92b8398
# Parent  8be34e5ef7ff6311220ecce794cc03e9bd972de0
Adding the unit converter code might have enhanced the previous commit a little

diff -r 8be34e5ef7ff -r 6778a82d6b76 widgets/UnitConverter.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widgets/UnitConverter.cpp	Tue Dec 02 13:30:24 2014 +0000
@@ -0,0 +1,146 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Visualiser
+    An audio file viewer and annotation editor.
+    Centre for Digital Music, Queen Mary, University of London.
+    
+    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.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#include "UnitConverter.h"
+
+#include <QSpinBox>
+#include <QComboBox>
+#include <QDoubleSpinBox>
+#include <QLabel>
+#include <QDialogButtonBox>
+#include <QGridLayout>
+
+#include "base/Debug.h"
+#include "base/Pitch.h"
+
+using namespace std;
+
+UnitConverter::UnitConverter(QWidget *parent) :
+    QDialog(parent)
+{
+    QGridLayout *grid = new QGridLayout;
+    setLayout(grid);
+
+    m_hz = new QDoubleSpinBox;
+    m_hz->setSuffix(QString(" Hz"));
+    m_hz->setDecimals(6);
+    m_hz->setMinimum(1e-6);
+    m_hz->setMaximum(1e6);
+    m_hz->setValue(440);
+    connect(m_hz, SIGNAL(valueChanged(double)),
+	    this, SLOT(hzChanged(double)));
+
+    m_midi = new QSpinBox;
+    m_midi->setMinimum(0);
+    m_midi->setMaximum(127);
+    connect(m_midi, SIGNAL(valueChanged(int)),
+	    this, SLOT(midiChanged(int)));
+
+    m_note = new QComboBox;
+    //!!!
+
+    m_octave = new QSpinBox;
+    //!!!
+
+    m_cents = new QDoubleSpinBox;
+    m_cents->setSuffix(tr(" cents"));
+    m_cents->setDecimals(4);
+    m_cents->setMinimum(-50);
+    m_cents->setMaximum(50);
+    connect(m_cents, SIGNAL(valueChanged(double)),
+	    this, SLOT(centsChanged(double)));
+
+    m_piano = new QSpinBox;
+    //!!!
+    
+    grid->addWidget(m_hz, 1, 0);
+    grid->addWidget(new QLabel(tr("=")), 1, 1);
+
+    grid->addWidget(new QLabel(tr("MIDI note")), 1, 2, 1, 2);
+    grid->addWidget(m_midi, 1, 4);
+
+    grid->addWidget(new QLabel(tr("+")), 1, 5);
+    grid->addWidget(m_cents, 1, 6);
+
+    QDialogButtonBox *bb = new QDialogButtonBox(QDialogButtonBox::Close);
+    grid->addWidget(bb, 2, 0, 1, 7);
+    connect(bb, SIGNAL(rejected()), this, SLOT(close()));
+
+    updateAllFromHz();
+}
+
+UnitConverter::~UnitConverter()
+{
+}
+
+void
+UnitConverter::hzChanged(double hz)
+{
+    cerr << "hzChanged: " << hz << endl;
+    updateAllFromHz();
+}
+
+void
+UnitConverter::midiChanged(int midi)
+{
+    cerr << "midiChanged: " << midi << endl;
+    m_hz->setValue(Pitch::getFrequencyForPitch(m_midi->value(), m_cents->value()));
+    updateAllFromHz();
+}
+
+void
+UnitConverter::noteChanged(int note)
+{
+    cerr << "noteChanged: " << note << endl;
+}
+
+void
+UnitConverter::octaveChanged(int oct)
+{
+    cerr << "octaveChanged: " << oct << endl;
+}
+
+void
+UnitConverter::centsChanged(double cents)
+{
+    cerr << "centsChanged: " << cents << endl;
+    m_hz->setValue(Pitch::getFrequencyForPitch(m_midi->value(), m_cents->value()));
+    updateAllFromHz();
+}
+
+void
+UnitConverter::pianoChanged(int piano)
+{
+    cerr << "pianoChanged: " << piano << endl;
+}
+
+void
+UnitConverter::updateAllFromHz()
+{
+    float cents = 0;
+    int pitch = Pitch::getPitchForFrequency(m_hz->value(), &cents);
+
+    m_midi->blockSignals(true);
+    m_cents->blockSignals(true);
+    
+    m_midi->setValue(pitch);
+    m_cents->setValue(cents);
+
+    m_midi->blockSignals(false);
+    m_cents->blockSignals(false);
+}
+
+
+
+ 
diff -r 8be34e5ef7ff -r 6778a82d6b76 widgets/UnitConverter.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widgets/UnitConverter.h	Tue Dec 02 13:30:24 2014 +0000
@@ -0,0 +1,51 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Visualiser
+    An audio file viewer and annotation editor.
+    Centre for Digital Music, Queen Mary, University of London.
+    
+    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.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef UNIT_CONVERTER_H
+#define UNIT_CONVERTER_H
+
+#include <QDialog>
+
+class QSpinBox;
+class QDoubleSpinBox;
+class QComboBox;
+
+class UnitConverter : public QDialog
+{
+    Q_OBJECT
+
+public:
+    UnitConverter(QWidget *parent = 0);
+    virtual ~UnitConverter();
+
+private slots:
+    void hzChanged(double);
+    void midiChanged(int);
+    void noteChanged(int);
+    void octaveChanged(int);
+    void centsChanged(double);
+    void pianoChanged(int);
+    
+private:
+    QDoubleSpinBox *m_hz;
+    QSpinBox *m_midi;
+    QComboBox *m_note;
+    QSpinBox *m_octave;
+    QDoubleSpinBox *m_cents;
+    QSpinBox *m_piano;
+
+    void updateAllFromHz();
+};
+
+#endif