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ktechlab/src/gui/oscilloscopeview.cpp

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/***************************************************************************
* Copyright (C) 2005 by David Saxton *
* david@bluehaze.org *
* *
* 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 "oscilloscope.h"
#include "oscilloscopedata.h"
#include "oscilloscopeview.h"
#include "probepositioner.h"
#include "simulator.h"
#include <tdeconfig.h>
#include <kdebug.h>
#include <tdelocale.h>
#include <tdeglobal.h>
#include <tdepopupmenu.h>
#include <tqcheckbox.h>
#include <tqcursor.h>
#include <tqevent.h>
#include <tqlabel.h>
#include <tqpainter.h>
#include <tqpixmap.h>
#include <tqscrollbar.h>
#include <tqtimer.h>
#include <algorithm>
#include <cmath>
inline ullong min( ullong a, ullong b )
{
return a < b ? a : b;
}
OscilloscopeView::OscilloscopeView( TQWidget *parent, const char *name )
: TQFrame( parent, name, WNoAutoErase ),
b_needRedraw(true),
m_pixmap(0l),
m_fps(10),
m_sliderValueAtClick(-1),
m_clickOffsetPos(-1),
m_pSimulator( Simulator::self() ),
m_halfOutputHeight(0.0)
{
TDEGlobal::config()->setGroup("Oscilloscope");
m_fps = TDEGlobal::config()->readNumEntry( "FPS", 25 );
setBackgroundMode(NoBackground);
setMouseTracking(true);
m_updateViewTmr = new TQTimer(this);
connect( m_updateViewTmr, TQT_SIGNAL(timeout()), this, TQT_SLOT(updateViewTimeout()) );
}
OscilloscopeView::~OscilloscopeView()
{
delete m_pixmap;
m_pixmap = 0l;
}
void OscilloscopeView::updateView()
{
if (m_updateViewTmr->isActive() )
return;
m_updateViewTmr->start( 1000/m_fps, true );
}
void OscilloscopeView::updateViewTimeout()
{
b_needRedraw = true;
repaint(false);
updateTimeLabel();
}
void OscilloscopeView::updateTimeLabel()
{
if ( hasMouse() )
{
int x = mapFromGlobal( TQCursor::pos() ).x();
double time = (double(Oscilloscope::self()->scrollTime()) / LOGIC_UPDATE_RATE) + (x / Oscilloscope::self()->pixelsPerSecond());
Oscilloscope::self()->timeLabel->setText( TQString::number( time, 'f', 6 ) );
}
else
Oscilloscope::self()->timeLabel->setText( TQString() );
}
void OscilloscopeView::resizeEvent( TQResizeEvent *e )
{
delete m_pixmap;
m_pixmap = new TQPixmap( e->size() );
b_needRedraw = true;
TQFrame::resizeEvent(e);
}
void OscilloscopeView::mousePressEvent( TQMouseEvent *event )
{
switch ( event->button() )
{
case Qt::LeftButton:
{
event->accept();
m_clickOffsetPos = event->pos().x();
m_sliderValueAtClick = Oscilloscope::self()->horizontalScroll->value();
setCursor( TQt::SizeAllCursor );
return;
}
case Qt::RightButton:
{
event->accept();
TDEPopupMenu fpsMenu;
fpsMenu.insertTitle( i18n("Framerate") );
const int fps[] = { 10, 25, 50, 75, 100 };
for ( uint i=0; i<5; ++i )
{
const int num = fps[i];
fpsMenu.insertItem( i18n("%1 fps").arg(num), num );
fpsMenu.setItemChecked( num, num == m_fps );
}
connect( &fpsMenu, TQT_SIGNAL(activated(int )), this, TQT_SLOT(slotSetFrameRate(int )) );
fpsMenu.exec( event->globalPos() );
return;
}
default:
{
TQFrame::mousePressEvent(event);
return;
}
}
}
void OscilloscopeView::mouseMoveEvent( TQMouseEvent *event )
{
event->accept();
updateTimeLabel();
if ( m_sliderValueAtClick != -1 )
{
int dx = event->pos().x() - m_clickOffsetPos;
int dTick = int( dx * Oscilloscope::self()->sliderTicksPerSecond() / Oscilloscope::self()->pixelsPerSecond() );
Oscilloscope::self()->horizontalScroll->setValue( m_sliderValueAtClick - dTick );
}
}
void OscilloscopeView::mouseReleaseEvent( TQMouseEvent *event )
{
if ( m_sliderValueAtClick == -1 )
return TQFrame::mouseReleaseEvent(event);
event->accept();
m_sliderValueAtClick = -1;
setCursor( TQt::ArrowCursor );
}
void OscilloscopeView::slotSetFrameRate( int fps )
{
m_fps = fps;
TDEGlobal::config()->setGroup("Oscilloscope");
TDEGlobal::config()->writeEntry( "FPS", m_fps );
}
// returns a % b
static double lld_modulus( llong a, double b )
{
return double(a) - llong(a/b)*b;
}
void OscilloscopeView::paintEvent( TQPaintEvent *e )
{
TQRect r = e->rect();
if (b_needRedraw)
{
updateOutputHeight();
const double pixelsPerSecond = Oscilloscope::self()->pixelsPerSecond();
TQPainter p;
m_pixmap->fill( paletteBackgroundColor() );
p.begin(m_pixmap);
p.setClipRegion(e->region());
//BEGIN Draw vertical marker lines
const double divisions = 5.0;
const double min_sep = 10.0;
double spacing = pixelsPerSecond/(std::pow( divisions, std::floor(std::log(pixelsPerSecond/min_sep)/std::log(divisions)) ));
// Pixels offset is the number of pixels that the view is scrolled along
const llong pixelsOffset = llong(Oscilloscope::self()->scrollTime()*pixelsPerSecond/LOGIC_UPDATE_RATE);
double linesOffset = - lld_modulus( pixelsOffset, spacing );
int blackness = 256 - int(184.0 * spacing / (min_sep*divisions*divisions));
p.setPen( TQColor( blackness, blackness, blackness ) );
for ( double i = linesOffset; i <= frameRect().width(); i += spacing )
p.drawLine( int(i), 1, int(i), frameRect().height()-2 );
spacing *= divisions;
linesOffset = - lld_modulus( pixelsOffset, spacing );
blackness = 256 - int(184.0 * spacing / (min_sep*divisions*divisions));
p.setPen( TQColor( blackness, blackness, blackness ) );
for ( double i = linesOffset; i <= frameRect().width(); i += spacing )
p.drawLine( int(i), 1, int(i), frameRect().height()-2 );
spacing *= divisions;
linesOffset = - lld_modulus( pixelsOffset, spacing );
blackness = 256 - int(184.0);
p.setPen( TQColor( blackness, blackness, blackness ) );
for ( double i = linesOffset; i <= frameRect().width(); i += spacing )
p.drawLine( int(i), 1, int(i), frameRect().height()-2 );
//END Draw vertical marker lines
drawLogicData(p);
drawFloatingData(p);
p.setPen(TQt::black);
p.drawRect( frameRect() );
b_needRedraw = false;
}
bitBlt( this, r.x(), r.y(), m_pixmap, r.x(), r.y(), r.width(), r.height() );
}
void OscilloscopeView::updateOutputHeight()
{
m_halfOutputHeight = int((Oscilloscope::self()->probePositioner->probeOutputHeight() - (probeArrowWidth/Oscilloscope::self()->numberOfProbes()))/2)-1;
}
void OscilloscopeView::drawLogicData( TQPainter & p )
{
const double pixelsPerSecond = Oscilloscope::self()->pixelsPerSecond();
const LogicProbeDataMap::iterator end = Oscilloscope::self()->m_logicProbeDataMap.end();
for ( LogicProbeDataMap::iterator it = Oscilloscope::self()->m_logicProbeDataMap.begin(); it != end; ++it )
{
// When searching for the next logic value to display, we look along
// until there is a recorded point which is at least one pixel along
// If we are zoomed out far, there might be thousands of data points
// between each pixel. It is time consuming searching for the next point
// to display one at a time, so we record the average number of data points
// between pixels ( = deltaAt / totalDeltaAt )
llong deltaAt = 1;
int totalDeltaAt = 1;
LogicProbeData * probe = it.data();
StoredData<LogicDataPoint> * data = &(probe->m_data);
if ( data->allocatedUpTo() == 0 )
continue;
const int midHeight = Oscilloscope::self()->probePositioner->probePosition(probe);
const llong timeOffset = Oscilloscope::self()->scrollTime();
// Draw the horizontal line indicating the midpoint of our output
p.setPen( TQColor( 228, 228, 228 ) );
p.drawLine( 0, midHeight, width(), midHeight );
// Set the pen colour according to the colour the user has selected for the probe
p.setPen( probe->color() );
// The smallest time step that will display in our oscilloscope
const int minTimeStep = int(LOGIC_UPDATE_RATE/pixelsPerSecond);
llong at = probe->findPos(timeOffset);
const llong maxAt = probe->insertPos();
llong prevTime = data->dataAt(at).time;
int prevX = (at > 0) ? 0 : int((prevTime - timeOffset)*(pixelsPerSecond/LOGIC_UPDATE_RATE));
bool prevHigh = data->dataAt(at).value;
int prevY = midHeight + int(prevHigh ? -m_halfOutputHeight : +m_halfOutputHeight);
while ( at < maxAt )
{
// Search for the next pos which will show up at our zoom level
llong previousAt = at;
llong dAt = deltaAt / totalDeltaAt;
while ( (dAt > 1) && (at < maxAt) && ( (llong(data->dataAt(at).time) - prevTime) != minTimeStep ) )
{
// Search forwards until we overshoot
while ( at < maxAt && ( llong(data->dataAt(at).time) - prevTime ) < minTimeStep )
at += dAt;
dAt /= 2;
// Search backwards until we undershoot
while ( (at < maxAt) && ( llong(data->dataAt(at).time) - prevTime ) > minTimeStep )
{
at -= dAt;
if ( at < 0 )
at = 0;
}
dAt /= 2;
}
// Possibly increment the value of at found by one (or more if this is the first go)
while ( (previousAt == at) || ((at < maxAt) && ( llong(data->dataAt(at).time) - prevTime ) < minTimeStep) )
at++;
if ( at >= maxAt )
break;
// Update the average values
deltaAt += at - previousAt;
totalDeltaAt++;
bool nextHigh = data->dataAt(at).value;
if ( nextHigh == prevHigh )
continue;
llong nextTime = data->dataAt(at).time;
int nextX = int((nextTime - timeOffset)*(pixelsPerSecond/LOGIC_UPDATE_RATE));
int nextY = midHeight + int(nextHigh ? -m_halfOutputHeight : +m_halfOutputHeight);
p.drawLine( prevX, prevY, nextX, prevY );
p.drawLine( nextX, prevY, nextX, nextY );
prevHigh = nextHigh;
prevTime = nextTime;
prevX = nextX;
prevY = nextY;
if ( nextX > width() )
break;
};
// If we could not draw right to the end; it is because we exceeded
// maxAt
if ( prevX < width() )
p.drawLine( prevX, prevY, width(), prevY );
}
}
#define v_to_y int(midHeight - (logarithmic ? ( (v>0) ? log(v/lowerAbsValue) : -log(-v/lowerAbsValue) ) : v) * sf)
void OscilloscopeView::drawFloatingData( TQPainter & p )
{
const double pixelsPerSecond = Oscilloscope::self()->pixelsPerSecond();
const FloatingProbeDataMap::iterator end = Oscilloscope::self()->m_floatingProbeDataMap.end();
for ( FloatingProbeDataMap::iterator it = Oscilloscope::self()->m_floatingProbeDataMap.begin(); it != end; ++it )
{
FloatingProbeData * probe = it.data();
StoredData<float> * data = &(probe->m_data);
if ( data->allocatedUpTo() == 0 )
continue;
bool logarithmic = probe->scaling() == FloatingProbeData::Logarithmic;
double lowerAbsValue = probe->lowerAbsValue();
double sf = m_halfOutputHeight / (logarithmic ? log(probe->upperAbsValue()/lowerAbsValue) : probe->upperAbsValue());
const int midHeight = Oscilloscope::self()->probePositioner->probePosition(probe);
const llong timeOffset = Oscilloscope::self()->scrollTime();
// Draw the horizontal line indicating the midpoint of our output
p.setPen( TQColor( 228, 228, 228 ) );
p.drawLine( 0, midHeight, width(), midHeight );
// Set the pen colour according to the colour the user has selected for the probe
p.setPen( probe->color() );
llong at = probe->findPos(timeOffset);
const llong maxAt = probe->insertPos();
llong prevTime = probe->toTime(at);
double v = data->dataAt((at>0)?at:0);
int prevY = v_to_y;
int prevX = int((prevTime - timeOffset)*(pixelsPerSecond/LOGIC_UPDATE_RATE));
while ( at < maxAt-1 )
{
at++;
ullong nextTime = prevTime + ullong(LOGIC_UPDATE_RATE/LINEAR_UPDATE_RATE);
double v = data->dataAt((at>0)?at:0);
int nextY = v_to_y;
int nextX = int((nextTime - timeOffset)*(pixelsPerSecond/LOGIC_UPDATE_RATE));
p.drawLine( prevX, prevY, nextX, nextY );
prevTime = nextTime;
prevX = nextX;
prevY = nextY;
if ( nextX > width() )
break;
};
// If we could not draw right to the end; it is because we exceeded
// maxAt
if ( prevX < width() )
p.drawLine( prevX, prevY, width(), prevY );
}
}
#include "oscilloscopeview.moc"