From kde-commits  Tue Jul 12 14:34:19 2005
From: Carsten Niehaus <cniehaus () gmx ! de>
Date: Tue, 12 Jul 2005 14:34:19 +0000
To: kde-commits
Subject: KDE/kdeedu/kalzium/src
Message-Id: <1121178859.750542.6183.nullmailer () svn ! kde ! org>
X-MARC-Message: https://marc.info/?l=kde-commits&m=112117887109109

SVN commit 434002 by cniehaus:

More work on the gradient


 M  +46 -8     spectrum.cpp  
 M  +13 -5     spectrum.h  


--- trunk/KDE/kdeedu/kalzium/src/spectrum.cpp #434001:434002
@@ -1,5 +1,5 @@
 /***************************************************************************
- *   Copyright (C) 2003-2005 by Carsten Niehaus                            *
+ *   Copyright (C) 2005 by Carsten Niehaus                                 *
  *   cniehaus@kde.org                                                      *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
@@ -22,37 +22,75 @@
 SpectrumWidget::SpectrumWidget( QWidget* parent, const char* name )
 	: QWidget( parent,name )
 {
+	startValue = 450;
+	endValue = 800;
+
+	m_realWidth = 360;
+	m_realHeight = 200;
 }
 
 SpectrumWidget::~SpectrumWidget(){}
 
-void SpectrumWidget::paintEvent( QPaintEvent *e )
+void SpectrumWidget::paintEvent( QPaintEvent * /*e*/ )
 {
 	QPainter p;
 	p.begin( this );
 	p.fillRect( 0, 0, width(), height(), paletteBackgroundColor() ); 
+	p.drawRect( 0,0, width(), height() );
 	drawLines(  &p );
 }
 
 void SpectrumWidget::drawLines( QPainter *p )
 {
 	//the spectrum goes from about 780nm to about 400nm
-	//750 is a dark red 
+	//700 is a dark red 
 	//660 yellow
 	//580 green
 	//500 light blue
 	//400 dark blue
+	
+	for(int h = 0; h < 300 ; ++h)
+	{
+		p->setPen(linecolor( h+450 ));
+		int xvalue = m_realWidth/360;
+		p->drawLine(xvalue*h,0,xvalue*h,m_realHeight );
+	}
 
-	QImage img = KImageEffect::gradient ( QSize( width(), height() ), Qt::blue, Qt::red, 
-										  KImageEffect::HorizontalGradient );
-	QPixmap pm( img );
+	int i = 0;
+	for ( QValueList<double>::Iterator it = m_spectra.begin();
+			it != m_spectra.end();
+			++it )
+	{
+		if ( (*it) < startValue || ( *it ) > endValue )
+			continue;
 
-	p->drawPixmap( width(), height(), pm );
+		int x = xPos( *it );
+		
+		int temp = 0; // every second item will have a little offset
+		if ( i%2 )
+			temp = 15;
+		else
+			temp = 0;
+		
+		p->drawLine( x,0,x, m_realHeight+10+temp );
+		p->drawText( x,m_realHeight+10+15+temp, QString::number( *it ));
+
+		i++;
+	}
 }
 
+int SpectrumWidget::xPos( double value )
+{
+	double var = ( endValue-startValue );
+	double coeff = ( value - startValue )/var;
+
+	return coeff * m_realWidth;
+}
+
 QColor SpectrumWidget::linecolor( double spectrum )
 {
-	QColor c( 128,128,128 );
+//	int Hcolor = 
+	QColor c( ( int )spectrum-450,255,255, QColor::Hsv );
 	return c;
 }
 
--- trunk/KDE/kdeedu/kalzium/src/spectrum.h #434001:434002
@@ -1,6 +1,9 @@
+#ifndef SPECTRUM_H
+#define SPECTRUM_H
 /***************************************************************************
- *   Copyright (C) 2003-2005 by Carsten Niehaus                            *
+ *   Copyright (C) 2005 by Carsten Niehaus                                 *
  *   cniehaus@kde.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  *
@@ -17,9 +20,6 @@
  *   Free Software Foundation, Inc.,                                       *
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  ***************************************************************************/
-#ifndef SPECTRUMWIDGET_H_
-#define SPECTRUMWIDGET_H_
-
 #include <qwidget.h>
 #include <qcolor.h>
 #include <qpainter.h>
@@ -52,14 +52,22 @@
 		 */
 		void drawLines( QPainter *p );
 
+		int xPos( double value );
+
 		/**
 		 * @returns the color of a line
 		 * @param spectrum the value of the spectrum
 		 */
 		QColor linecolor( double spectrum );
+	
+		double startValue;
+		double endValue;
+	
+		int m_realWidth;
+		int m_realHeight;
 
 	protected:
 		virtual void paintEvent( QPaintEvent *e );
 };
+#endif // SPECTRUM_H
 
-#endif
\ No newline at end of file