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Viewing changes to qwt-5.1.1/examples/radio/tunerfrm.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Fathi Boudra
  • Date: 2008-05-26 10:26:31 UTC
  • mfrom: (1.1.3 upstream) (2.1.1 lenny)
  • Revision ID: james.westby@ubuntu.com-20080526102631-bp95mfccnrb957nx
Tags: 5.1.1-1
New upstream release.

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qwt-5.1.1/examples/radio/tunerfrm.cpp
 
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#include <qlayout.h>
 
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#include <qlabel.h>
 
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#include <qwt_wheel.h>
 
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#include <qwt_slider.h>
 
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#include <qwt_thermo.h>
 
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#include <qwt_math.h>
 
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#include "tunerfrm.h"
 
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class TuningThermo: public QWidget
 
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{
 
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public:
 
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    TuningThermo(QWidget *parent):
 
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        QWidget(parent)
 
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    {
 
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        d_thermo = new QwtThermo(this);
 
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        d_thermo->setOrientation(Qt::Horizontal, QwtThermo::NoScale);
 
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        d_thermo->setRange(0.0, 1.0);
 
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        d_thermo->setFillColor(Qt::green);
 
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        QLabel *label = new QLabel("Tuning", this);
 
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        label->setAlignment(Qt::AlignCenter);
 
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        QVBoxLayout *layout = new QVBoxLayout(this);
 
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        layout->setMargin(0);
 
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        layout->addWidget(d_thermo);
 
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        layout->addWidget(label);
 
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        setFixedWidth(3 * label->sizeHint().width());
 
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    }
 
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    void setValue(double value)
 
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    {
 
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        d_thermo->setValue(value);
 
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    }
 
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private:
 
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    QwtThermo *d_thermo;
 
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};
 
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TunerFrame::TunerFrame(QWidget *parent): 
 
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    QFrame(parent)
 
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{
 
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    d_sldFreq = new QwtSlider(this, Qt::Horizontal, QwtSlider::TopScale);
 
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    d_sldFreq->setRange(87.5, 108, 0.01, 10);
 
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    d_sldFreq->setScaleMaxMinor(5);
 
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    d_sldFreq->setScaleMaxMajor(12);
 
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    d_sldFreq->setThumbLength(80);
 
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    d_sldFreq->setBorderWidth(1);
 
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    d_thmTune = new TuningThermo(this);
 
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    d_whlFreq = new QwtWheel(this);
 
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    d_whlFreq->setMass(0.5);
 
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    d_whlFreq->setRange(87.5, 108, 0.01);
 
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    d_whlFreq->setTotalAngle(3600.0);
 
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    d_whlFreq->setFixedHeight(30);
 
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    connect(d_whlFreq, SIGNAL(valueChanged(double)), SLOT(adjustFreq(double)));
 
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    connect(d_sldFreq, SIGNAL(valueChanged(double)), SLOT(adjustFreq(double)));
 
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    QVBoxLayout *mainLayout = new QVBoxLayout(this);
 
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    mainLayout->setMargin(10);
 
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    mainLayout->setSpacing(5);
 
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    mainLayout->addWidget(d_sldFreq);
 
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    QHBoxLayout *hLayout = new QHBoxLayout;
 
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    hLayout->setMargin(0);
 
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    hLayout->addWidget(d_thmTune, 0);
 
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    hLayout->addStretch(5);
 
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    hLayout->addWidget(d_whlFreq, 2);
 
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    mainLayout->addLayout(hLayout);
 
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}
 
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void TunerFrame::adjustFreq(double frq)
 
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{
 
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    const double factor = 13.0 / (108 - 87.5);
 
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    const double x = (frq - 87.5) * factor;
 
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    const double field = qwtSqr(sin(x) * cos(4.0 * x));
 
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    d_thmTune->setValue(field);  
 
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    if (d_sldFreq->value() != frq) 
 
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        d_sldFreq->setValue(frq);
 
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    if (d_whlFreq->value() != frq) 
 
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        d_whlFreq->setValue(frq);
 
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    emit fieldChanged(field);   
 
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}
 
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void TunerFrame::setFreq(double frq)
 
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{
 
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    d_whlFreq->setValue(frq);
 
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}