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, 263 insertions, 0 deletions

diff --git a/libkdeedu/kdeeduplot/kplotwidget.h b/libkdeedu/kdeeduplot/kplotwidget.h
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+++ b/libkdeedu/kdeeduplot/kplotwidget.h
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+/***************************************************************************
+                          kplotwidget.h - A generic data-plotting widget
+                             -------------------
+    begin                : Sun 18 May 2003
+    copyright            : (C) 2003 by Jason Harris
+    email                : kstars@30doradus.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.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef _KPLOTWIDGET_H_
+#define _KPLOTWIDGET_H_
+
+#include <qwidget.h>
+#include "kplotobject.h"
+#include "kplotaxis.h"
+
+#define BIGTICKSIZE 10
+#define SMALLTICKSIZE 4
+#define XPADDING 20
+#define YPADDING 20
+
+class QColor;
+class QPixmap;
+
+/**@class KPlotWidget
+	*@short Genric data plotting widget.
+	*@author Jason Harris
+	*@version 1.1
+	*Widget for drawing plots.  Includes adjustable axes (KPlotAxis) with
+ 	*tickmarks and labels and a list of KPlotObjects to be drawn.
+	*/
+
+class KDE_EXPORT KPlotWidget : public QWidget {
+	Q_OBJECT
+public:
+	/**@short Constructor.  Sets the primary x and y limits in data units.
+		*@param x1 the minimum X value in data units
+		*@param x2 the maximum X value in data units
+		*@param y1 the minimum Y value in data units
+		*@param y2 the maximum Y value in data units
+		*@param parent the parent widget
+		*@param name name label for the KPlotWidget
+		*/
+	KPlotWidget( double x1=0.0, double x2=1.0, double y1=0.0, double y2=1.0, QWidget *parent=0, const char* name=0 );
+
+	/**Destructor (empty)
+		*/
+	virtual ~KPlotWidget();
+
+	/**@short Determine the placement of major and minor tickmarks,
+		*based on the current Limit settings
+		*/
+	virtual void updateTickmarks();
+
+	/**@short Reset the data limits.
+		*@param x1 the minimum X value in data units
+		*@param x2 the maximum X value in data units
+		*@param y1 the minimum Y value in data units
+		*@param y2 the maximum Y value in data units
+		*/
+	virtual void setLimits( double x1, double x2, double y1, double y2 );
+
+	/**@return the minimum X value in data units*/
+	virtual double x() const { return DataRect.x(); }
+
+	/**@return the maximum X value in data units*/
+	virtual double x2() const { return DataRect.x2(); }
+
+	/**@return the minimum Y value in data units*/
+	virtual double y() const { return DataRect.y(); }
+
+	/**@return the maximum Y value in data units*/
+	virtual double y2() const { return DataRect.y2(); }
+
+	/**@return the width in data units*/
+	virtual double dataWidth() const { return DataRect.width(); }
+
+	/**@return the height in data units*/
+	virtual double dataHeight() const { return DataRect.height(); }
+
+	/**@short Add an item to the list of KPlotObjects to be plotted.
+		*@param o pointer to the KPlotObject to be added
+		*/
+	virtual void addObject( KPlotObject *o ) { ObjectList.append( o ); }
+
+	/**@short Remove all items from the list of KPlotObjects
+		*/
+	virtual void clearObjectList() { ObjectList.clear(); update(); }
+
+	/**@short replace an item in the KPlotObject list.
+		*@param i the index of th item to be replaced
+		*@param o pointer to the replacement KPlotObject
+		*/
+	virtual void replaceObject( int i, KPlotObject *o ) { ObjectList.replace( i, o ); }
+
+	/**@return the number of KPlotObjects in the list
+		*/
+	virtual int objectCount() const { return ObjectList.count(); }
+
+	/**@return a pointer to a specific KPlotObject in the list
+	 *@param i the index of the desired KPlotObject
+	 */
+	virtual KPlotObject *object( int i ) { return ObjectList.at(i); }
+
+	/**@return the background color */
+	virtual QColor bgColor() const { return cBackground; }
+
+	/**@return the foreground color */
+	virtual QColor fgColor() const { return cForeground; }
+
+	/**@return the grid color */
+	virtual QColor gridColor() const { return cGrid; }
+
+	/**@short set the background color
+		*@param bg the new background color
+		*/
+	virtual void setBGColor( const QColor &bg ) { cBackground = bg; setBackgroundColor( bg ); }
+
+	/**@short set the foreground color
+		*@param fg the new foreground color
+		*/
+	virtual void setFGColor( const QColor &fg ) { cForeground = fg; }
+
+	/**@short set the grid color
+		*@param gc the new grid color
+		*/
+	virtual void setGridColor( const QColor &gc ) { cGrid = gc; }
+
+	/**@short toggle whether plot axes are drawn.
+		*@param show if true, axes will be drawn.
+		*The axes are just a box outline around the plot.
+		*/
+	virtual void setShowAxes( bool show ) { BottomAxis.setVisible(show); LeftAxis.setVisible(show); }
+	/**@short toggle whether tick marks are drawn along the axes.
+		*@param show if true, tick marks will be drawn.
+		*/
+	virtual void setShowTickMarks( bool show ) { ShowTickMarks = show; }
+	/**@short toggle whether tick labels are drawn at major tickmarks.
+		*@param show if true, tick labels will be drawn.
+		*/
+	virtual void setShowTickLabels( bool show ) { ShowTickLabels = show; }
+	/**@short toggle whether grid lines are drawn at major tickmarks.
+		*@param show if true, grid lines will be drawn.
+		*/
+	virtual void setShowGrid( bool show ) { ShowGrid = show; }
+
+	/**@short (Deprecated) Sets the X-axis label
+		*@param xlabel a short string describing the data plotted on the x-axis.
+		*Set the label to an empty string to omit the axis label.
+        *This function is deprecated, set the label property in the BottomAxis directly.
+		*/
+	virtual void setXAxisLabel( QString xlabel ) { BottomAxis.setLabel(xlabel); }
+	/**@short (Deprecated) Sets the Y-axis label
+		*@param ylabel a short string describing the data plotted on the y-axis.
+		*Set the label to an empty string to omit the axis label.
+        *This function is deprecated, set the label property in the LeftAxis directly.
+		*/
+	virtual void setYAxisLabel( QString ylabel ) { LeftAxis.setLabel(ylabel); }
+
+	/**@returns the number of pixels to the left of the plot area.  Padding values
+		*are set to -1 by default; if unchanged, this function will try to guess
+		*a good value, based on whether ticklabels and/or axis labels are to be drawn.
+		*/
+	virtual int leftPadding()   const;
+	/**@returns the number of pixels to the right of the plot area.
+		*Padding values are set to -1 by default; if unchanged, this function will try to guess
+		*a good value, based on whether ticklabels and/or axis labels are to be drawn.
+		*/
+	virtual int rightPadding()  const;
+	/**@returns the number of pixels above the plot area.
+		*Padding values are set to -1 by default; if unchanged, this function will try to guess
+		*a good value, based on whether ticklabels and/or axis labels are to be drawn.
+		*/
+	virtual int topPadding()    const;
+	/**@returns the number of pixels below the plot area.
+		*Padding values are set to -1 by default; if unchanged, this function will try to guess
+		*a good value, based on whether ticklabels and/or axis labels are to be drawn.
+		*/
+	virtual int bottomPadding() const;
+
+	/**@short set the number of pixels to the left of the plot area.
+		*Set this to -1 to revert to automatic determination of padding values.
+		*/
+	virtual void setLeftPadding( int pad )   { LeftPadding = pad; }
+	/**@short set the number of pixels to the right of the plot area.
+		*Set this to -1 to revert to automatic determination of padding values.
+		*/
+	virtual void setRightPadding( int pad )  { RightPadding = pad; }
+	/**@short set the number of pixels above the plot area.
+		*Set this to -1 to revert to automatic determination of padding values.
+		*/
+	virtual void setTopPadding( int pad )    { TopPadding = pad; }
+	/**@short set the number of pixels below the plot area.
+		*Set this to -1 to revert to automatic determination of padding values.
+		*/
+	virtual void setBottomPadding( int pad ) { BottomPadding = pad; }
+
+	/**@short revert all four padding values to be automatically determined. */
+	virtual void setDefaultPadding() { LeftPadding = -1; RightPadding = -1; TopPadding = -1; BottomPadding = -1; }
+
+	/**@short The bottom X axis. */
+	KPlotAxis 	BottomAxis;
+	/**@short The left Y axis. */
+	KPlotAxis 	LeftAxis;
+
+protected:
+	/**@short the paint event handler, executed when update() or repaint() is called.
+		*/
+	virtual void paintEvent( QPaintEvent* /* e */ );
+
+	/**@short the resize event handler, called when the widget is resized.
+		*/
+	virtual void resizeEvent( QResizeEvent* /* e */ );
+
+	/**@short draws all of the objects onto the widget.  Internal use only; one should simply call update()
+		*to draw the widget with axes and all objects.
+		*@param p pointer to the painter on which we are drawing
+		*/
+	virtual void drawObjects( QPainter *p );
+
+	/**@short draws the plot axes and axis labels.  Internal use only; one should simply call update()
+		*to draw the widget with axes and all objects.
+		*@param p pointer to the painter on which we are drawing
+		*/
+	virtual void drawBox( QPainter *p );
+
+	/**@short modulus function for double variables.
+		*For example, dmod( 17.0, 7.0 ) returns 3.0
+		*@return the remainder after dividing b into a.
+		*/
+	double dmod( double a, double b );
+
+	//The distance between major tickmarks in data units
+	double dXtick, dYtick;
+	//The number of major and minor tickmarks to be plotted in X and Y
+	int nmajX, nminX, nmajY, nminY;
+
+	//Limits of the plot area in pixel units
+	QRect PixRect;
+	//Limits of the plot area in data units
+	DRect DataRect;
+	//List of KPlotObjects
+	QPtrList<KPlotObject> ObjectList;
+
+	//Colors
+	QColor cBackground, cForeground, cGrid;
+	//draw options
+	bool ShowTickMarks, ShowTickLabels, ShowGrid;
+	//padding
+	int LeftPadding, RightPadding, TopPadding, BottomPadding;
+
+	QPixmap *buffer;
+};
+
+#endif