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/***************************************************************************
kplotwidget.h - A generic data-plotting widget
-------------------
begin : Sun 18 May 2003
copyright : (C) 2003 by Jason Harris
email : [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. *
* *
***************************************************************************/
#ifndef _KPLOTWIDGET_H_
#define _KPLOTWIDGET_H_
#include <tqwidget.h>
#include "kplotobject.h"
#include "kplotaxis.h"
#define BIGTICKSIZE 10
#define SMALLTICKSIZE 4
#define XPADDING 20
#define YPADDING 20
class TQColor;
class TQPixmap;
/**@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 TQWidget {
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, TQWidget *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 TQColor bgColor() const { return cBackground; }
/**@return the foreground color */
virtual TQColor fgColor() const { return cForeground; }
/**@return the grid color */
virtual TQColor gridColor() const { return cGrid; }
/**@short set the background color
*@param bg the new background color
*/
virtual void setBGColor( const TQColor &bg ) { cBackground = bg; setBackgroundColor( bg ); }
/**@short set the foreground color
*@param fg the new foreground color
*/
virtual void setFGColor( const TQColor &fg ) { cForeground = fg; }
/**@short set the grid color
*@param gc the new grid color
*/
virtual void setGridColor( const TQColor &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( TQString 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( TQString 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( TQPaintEvent* /* e */ );
/**@short the resize event handler, called when the widget is resized.
*/
virtual void resizeEvent( TQResizeEvent* /* 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( TQPainter *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( TQPainter *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
TQRect PixRect;
//Limits of the plot area in data units
DRect DataRect;
//List of KPlotObjects
TQPtrList<KPlotObject> ObjectList;
//Colors
TQColor cBackground, cForeground, cGrid;
//draw options
bool ShowTickMarks, ShowTickLabels, ShowGrid;
//padding
int LeftPadding, RightPadding, TopPadding, BottomPadding;
TQPixmap *buffer;
};
#endif
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