Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdeedu@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 234 insertions, 0 deletions

diff --git a/kalzium/src/spectrumwidget.h b/kalzium/src/spectrumwidget.h
new file mode 100644
index 00000000..84a6fd80
--- /dev/null
+++ b/kalzium/src/spectrumwidget.h
@@ -0,0 +1,234 @@
+/***************************************************************************
+ *   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  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.             *
+ ***************************************************************************/
+#ifndef SPECTRUMWIDGET_H
+#define SPECTRUMWIDGET_H
+
+#include <qwidget.h>
+
+#include <qpixmap.h>
+
+#include "spectrum.h"
+
+/**
+ * @author Carsten Niehaus
+ * 
+ */
+class SpectrumWidget : public QWidget
+{
+	Q_OBJECT
+
+	public:
+		SpectrumWidget( QWidget *parent, const char* name = 0 );
+		
+		~SpectrumWidget(){}
+
+		void setSpectrum( Spectrum* spec ){
+			m_spectrum = spec;
+			update();
+		}
+
+		Spectrum* spectrum()const{
+			return m_spectrum;
+		}
+
+		/**
+		 * This limits the width of the spectrum in terms of
+		 * wavelength. For example you can set it to only
+		 * show the area between 500 and 550 nm. Invalid values
+		 * will be set back to the default start- and stopvalues
+		 *
+		 * @param left the left border
+		 * @param right the right border
+		 */
+		void setBorders( double left, double right ){
+			//check for invalid values
+			if ( startValue < 0.0 )
+				startValue = 0.0;
+
+			if ( endValue > 800.0 )
+				endValue = 800.0;
+			
+			startValue = left;
+			endValue = right;
+
+			update();
+		}
+		
+		/**
+		 * find the nearest band. The returned value is the number
+		 * of pixel the next band is away
+		 */
+		int findNearestBand( QValueList<double>::iterator it );
+
+		/**
+		 * there are several possible types.
+		 */
+		enum SpectrumType
+		{
+			EmissionSpectrum = 0,
+			AbsorptionSpectrum
+		};
+
+		/**
+		 * sets the type of the spectrum to @p t
+		 * @param t the type of the spectrum
+		 */
+		void setType( SpectrumType t ){
+			m_type = t;
+		}
+
+		/**
+		 * @return the currently active type
+		 * of the spectrum
+		 */
+		SpectrumType spectrumType() const{
+			return m_type;
+		}
+		
+		/**
+		 * @returns the color of a line
+		 * @param spectrum the value of the spectrum
+		 */
+		QColor linecolor( double spectrum );
+		
+		double Gamma;
+		int IntensityMax;
+		
+		/**
+		 * @return the adjusted value of the @p color. The
+		 * correction depends on @p factor which has been
+		 * figured out emperically
+		 */
+		int Adjust( double color, double factor );
+		
+		/**
+		 * @return the postion in the widget of a band 
+		 * with the wavelength @p wavelength
+		 * 
+		 * @param wavelength the wavelength for which the position is needed
+		 */
+		inline int xPos( double wavelength ){
+			return ( int ) ( ( wavelength-startValue ) * width() / ( endValue - startValue ) );
+		}
+
+		void PrepareTooltip( double wavelength );
+
+		void showTooltip( Spectrum::band band );
+		
+		/**
+		 * @param xpos The ratio of the position relative to the width
+		 * of the widget.
+		 * @return the wavelength on position @p xpos
+		 */
+		inline double Wavelength( double xpos ){
+			return startValue + (  (  endValue-startValue ) *  xpos );
+		}
+
+		/**
+		 * This method changes the three values @p r, @p g and @p b to the
+		 * correct values
+		 * @param wavelength the wavelength for which the color is searched
+		 * @param r red
+		 * @param g green
+		 * @param b blue
+		 */
+		void wavelengthToRGB( double wavelength, int& r, int& g, int& b );
+
+		QPixmap pixmap();
+	
+	private:
+		QValueList<double> m_spectra;
+
+		SpectrumType m_type;
+
+		Spectrum *m_spectrum;
+
+		QPixmap m_pixmap;
+
+		bool m_showtooltip;
+
+		Spectrum::band m_band;
+		
+		void paintBands( QPainter* p );
+		void drawZoomLine( QPainter* p );
+		void drawTooltip( QPainter *p );
+		
+		/**
+		 * Draw the scale
+		 */
+		void drawTickmarks( QPainter *p );
+
+		double startValue;
+		double endValue;
+
+		int m_realHeight;
+
+		/**
+		 * this QPoint stores the information where
+		 * the left mouse button has been pressed. This
+		 * is used for the mouse zooming
+		 */
+		QPoint m_LMBPointPress;
+		
+		QPoint m_LMBPointCurrent;
+
+	public slots:
+		/**
+		 * set the the maximum value to @p value
+		 */
+		void setRightBorder( int value ){
+			endValue = value;
+			if ( endValue < startValue )
+				startValue = endValue-1;
+			update();
+		}
+		
+		/**
+		 * set the the minimum value to @p value
+		 */
+		void setLeftBorder( int value ){
+			startValue = value;
+			if ( startValue > endValue )
+				endValue = startValue+1;
+			update();
+		}
+
+		/**
+		 * activates the spectrum of the type @p spectrumtype
+		 */
+		void slotActivateSpectrum( int spectrumtype ){
+			m_type = ( SpectrumType )spectrumtype;
+			update();
+		}
+
+	private slots:
+		void slotZoomIn();
+		void slotZoomOut();
+	
+	protected:
+		virtual void paintEvent( QPaintEvent *e );
+		virtual void keyPressEvent(QKeyEvent *e);
+		virtual void mouseMoveEvent( QMouseEvent *e );
+		virtual void mousePressEvent( QMouseEvent *e );
+		virtual void mouseReleaseEvent( QMouseEvent *e );
+};
+
+#endif // SPECTRUMWIDGET_H