void Oscilloscope::setZoomLevel( double zoomLevel)
{
if( zoomLevel < 0.0)
zoomLevel = 0.0;
else if( zoomLevel > 1.0)
zoomLevel = 1.0;
KGlobal::config()->setGroup("Oscilloscope");
KGlobal::config()->writeEntry( "ZoomLevel", zoomLevel);
// We want to maintain the position of the *center* of the view, not the
// left edge, so have to record time at center of view... We also have to
// handle the case where the scroll is at the end separately.
bool wasAtUpperEnd = horizontalScroll->maxValue() == horizontalScroll->value();
int pageLength = int(oscilloscopeView->width()*sliderTicksPerSecond()/pixelsPerSecond());
int at_ticks = horizontalScroll->value() + (pageLength/2);
m_zoomLevel = zoomLevel;
zoomSlider->setValue( int((double(zoomSlider->maxValue())*zoomLevel)+0.5));
updateScrollbars();
// And restore the center position of the slider
if(!wasAtUpperEnd)
{
int pageLength = int(oscilloscopeView->width()*sliderTicksPerSecond()/pixelsPerSecond());
horizontalScroll->setValue( at_ticks - (pageLength/2));
oscilloscopeView->updateView();
}
}
int64_t Oscilloscope::scrollTime() const
{
// if( b_isPaused || numberOfProbes() == 0)
// return 0;
if( numberOfProbes() == 0) return 0;
if( horizontalScroll->maxValue() == 0)
{
int64_t lengthAsTime = int64_t( oscilloscopeView->width() * LOGIC_UPDATE_RATE / pixelsPerSecond());
int64_t ret = m_pSimulator->time() - lengthAsTime;
if(ret < 0) return 0;
return ret;
} else return int64_t( m_oldestProbe->resetTime() + (int64_t(horizontalScroll->value()) * LOGIC_UPDATE_RATE / sliderTicksPerSecond()));
}
void Oscilloscope::updateScrollbars()
{
bool wasAtUpperEnd = horizontalScroll->maxValue() == horizontalScroll->value();
const float pps = pixelsPerSecond();
int pageLength = int(oscilloscopeView->width()*sliderTicksPerSecond()/pps);
int64_t timeAsTicks = time()*sliderTicksPerSecond()/LOGIC_UPDATE_RATE;
int64_t upper = (timeAsTicks > pageLength) ? (timeAsTicks - pageLength) : 0;
horizontalScroll->setRange( 0, upper);
horizontalScroll->setPageStep( uint64_t(oscilloscopeView->width()*sliderTicksPerSecond()/pps));
if(wasAtUpperEnd)
{
horizontalScroll->setValue( horizontalScroll->maxValue());
oscilloscopeView->updateView();
}
}
void midiConductor::setup(double totalTime, double pixPerSecond)
{
setPlaybackTime(totalTime);
pixelsPerSecond(pixPerSecond);
}
