1 files changed, 86 insertions, 0 deletions
diff --git a/src/electronics/components/ecsignallamp.cpp b/src/electronics/components/ecsignallamp.cpp
new file mode 100644
index 0000000..c7034f7
--- /dev/null
+++ b/src/electronics/components/ecsignallamp.cpp
@@ -0,0 +1,86 @@
+/***************************************************************************
+ *   Copyright (C) 2003-2005 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 "ecnode.h"
+#include "ecsignallamp.h"
+#include "element.h"
+#include "libraryitem.h"
+#include "pin.h"
+
+#include <klocale.h>
+#include <qpainter.h>
+
+Item* ECSignalLamp::construct( ItemDocument *itemDocument, bool newItem, const char *id )
+{
+	return new ECSignalLamp( (ICNDocument*)itemDocument, newItem, id );
+}
+
+LibraryItem* ECSignalLamp::libraryItem()
+{
+	return new LibraryItem(
+		QString("ec/signal_lamp"),
+		i18n("Signal Lamp"),
+		i18n("Outputs"),
+		"signal_lamp.png",
+		LibraryItem::lit_component,
+		ECSignalLamp::construct );
+}
+
+ECSignalLamp::ECSignalLamp( ICNDocument *icnDocument, bool newItem, const char *id )
+	: Component( icnDocument, newItem, (id) ? id : "signal_lamp" )
+{
+	m_name = i18n("Signal Lamp");
+	m_desc = i18n("A simple filament signal lamp, with a 100 ohms series resistance.");
+	setSize( -8, -8, 16, 16 );
+	
+	init1PinLeft();
+	init1PinRight();
+	
+	createResistance( m_pPNode[0], m_pNNode[0], 100. );
+	
+	advanceSinceUpdate = 0;
+	avgPower = 0.;
+	m_bDynamicContent = true;
+}
+
+ECSignalLamp::~ECSignalLamp()
+{
+}
+
+void ECSignalLamp::stepNonLogic()
+{
+	const double voltage = m_pPNode[0]->pin()->voltage()-m_pNNode[0]->pin()->voltage();
+	avgPower = QABS(avgPower*advanceSinceUpdate + (voltage*voltage/100))/++advanceSinceUpdate;
+}
+
+void ECSignalLamp::drawShape( QPainter &p )
+{
+	initPainter(p);
+	
+	int _x = int(x());
+	int _y = int(y());
+	
+	// Calculate the brightness as a linear function of power, bounded below by
+	// 25 milliWatts and above by 500 milliWatts.
+	int brightness = (avgPower<0.025) ? 255 : ((avgPower>0.5) ? 0 : (int)(255*(1-((avgPower-0.025)/0.475))));
+	advanceSinceUpdate = 0;
+	
+	p.setBrush( QColor( 255, 255, brightness ) );
+	p.drawEllipse( _x-8, _y-8, 16, 16 );
+	
+	// 2*sqrt(2) = 2.828427125...
+	int pos = 8 - int(16/2.828);
+	
+	p.drawLine( _x-8+pos,	_y-8+pos, _x+8-pos,	_y+8-pos );
+	p.drawLine( _x+8-pos,	_y-8+pos, _x-8+pos,	_y+8-pos );
+	
+	deinitPainter(p);
+}