1 files changed, 431 insertions, 0 deletions
diff --git a/src/gui/oscilloscopeview.cpp b/src/gui/oscilloscopeview.cpp
new file mode 100644
index 0000000..3d2a40a
--- /dev/null
+++ b/src/gui/oscilloscopeview.cpp
@@ -0,0 +1,431 @@
+/***************************************************************************
+ *   Copyright (C) 2005 by David Saxton                                    *
+ *   [email protected]                                                    *
+ *                                                                         *
+ *   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 <kconfig.h>
+#include <kdebug.h>
+#include <klocale.h>
+#include <kglobal.h>
+#include <kpopupmenu.h>
+#include <qcheckbox.h>
+#include <qcursor.h>
+#include <qevent.h>
+#include <qlabel.h>
+#include <qpainter.h>
+#include <qpixmap.h>
+#include <qscrollbar.h>
+#include <qtimer.h>
+
+#include <algorithm>
+#include <cmath>
+
+inline ullong min( ullong a, ullong b )
+{
+	return a < b ? a : b;
+}
+
+
+OscilloscopeView::OscilloscopeView( QWidget *parent, const char *name )
+	: QFrame( 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)
+{
+	KGlobal::config()->setGroup("Oscilloscope");
+	m_fps = KGlobal::config()->readNumEntry( "FPS", 25 );
+	
+	setBackgroundMode(NoBackground);
+	setMouseTracking(true);
+	
+	m_updateViewTmr = new QTimer(this);
+	connect( m_updateViewTmr, SIGNAL(timeout()), this, 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( QCursor::pos() ).x();
+		double time = (double(Oscilloscope::self()->scrollTime()) / LOGIC_UPDATE_RATE) + (x / Oscilloscope::self()->pixelsPerSecond());
+		Oscilloscope::self()->timeLabel->setText( QString::number( time, 'f', 6 ) );
+	}
+	
+	else
+		Oscilloscope::self()->timeLabel->setText( QString::null );
+}
+
+
+void OscilloscopeView::resizeEvent( QResizeEvent *e )
+{
+	delete m_pixmap;
+	m_pixmap = new QPixmap( e->size() );
+	b_needRedraw = true;
+	QFrame::resizeEvent(e);
+}
+
+
+void OscilloscopeView::mousePressEvent( QMouseEvent *event )
+{
+	switch ( event->button() )
+	{
+		case Qt::LeftButton:
+		{
+			event->accept();
+			m_clickOffsetPos = event->pos().x();
+			m_sliderValueAtClick = Oscilloscope::self()->horizontalScroll->value();
+			setCursor( Qt::SizeAllCursor );
+			return;
+		}
+		
+		case Qt::RightButton:
+		{
+			event->accept();
+	
+			KPopupMenu 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, SIGNAL(activated(int )), this, SLOT(slotSetFrameRate(int )) );
+			fpsMenu.exec( event->globalPos() );
+			return;
+		}
+		
+		default:
+		{
+			QFrame::mousePressEvent(event);
+			return;
+		}
+	}
+}
+
+
+void OscilloscopeView::mouseMoveEvent( QMouseEvent *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( QMouseEvent *event )
+{
+	if ( m_sliderValueAtClick == -1 )
+		return QFrame::mouseReleaseEvent(event);
+	
+	event->accept();
+	m_sliderValueAtClick = -1;
+	setCursor( Qt::ArrowCursor );
+}
+
+
+void OscilloscopeView::slotSetFrameRate( int fps )
+{
+	m_fps = fps;
+	KGlobal::config()->setGroup("Oscilloscope");
+	KGlobal::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( QPaintEvent *e )
+{
+	QRect r = e->rect();
+	
+	if (b_needRedraw)
+	{
+		updateOutputHeight();
+		const double pixelsPerSecond = Oscilloscope::self()->pixelsPerSecond();
+		
+		QPainter 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( QColor( 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( QColor( 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( QColor( 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(Qt::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( QPainter & 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( QColor( 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( QPainter & 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( QColor( 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"