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265 lines
9.8 KiB
265 lines
9.8 KiB
/***************************************************************************
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kplotwidget.h - A generic data-plotting widget
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-------------------
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begin : Sun 18 May 2003
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copyright : (C) 2003 by Jason Harris
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email : kstars@30doradus.org
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef _KPLOTWIDGET_H_
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#define _KPLOTWIDGET_H_
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#include <tqwidget.h>
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#include "kplotobject.h"
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#include "kplotaxis.h"
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#define BIGTICKSIZE 10
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#define SMALLTICKSIZE 4
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#define XPADDING 20
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#define YPADDING 20
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class TQColor;
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class TQPixmap;
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/**@class KPlotWidget
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*@short Genric data plotting widget.
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*@author Jason Harris
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*@version 1.1
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*Widget for drawing plots. Includes adjustable axes (KPlotAxis) with
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*tickmarks and labels and a list of KPlotObjects to be drawn.
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*/
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class KDE_EXPORT KPlotWidget : public TQWidget {
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Q_OBJECT
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TQ_OBJECT
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public:
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/**@short Constructor. Sets the primary x and y limits in data units.
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*@param x1 the minimum X value in data units
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*@param x2 the maximum X value in data units
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*@param y1 the minimum Y value in data units
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*@param y2 the maximum Y value in data units
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*@param parent the parent widget
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*@param name name label for the KPlotWidget
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*/
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KPlotWidget( double x1=0.0, double x2=1.0, double y1=0.0, double y2=1.0, TQWidget *parent=0, const char* name=0 );
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/**Destructor (empty)
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*/
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virtual ~KPlotWidget();
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/**@short Determine the placement of major and minor tickmarks,
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*based on the current Limit settings
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*/
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virtual void updateTickmarks();
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/**@short Reset the data limits.
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*@param x1 the minimum X value in data units
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*@param x2 the maximum X value in data units
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*@param y1 the minimum Y value in data units
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*@param y2 the maximum Y value in data units
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*/
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virtual void setLimits( double x1, double x2, double y1, double y2 );
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/**@return the minimum X value in data units*/
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virtual double x() const { return DataRect.x(); }
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/**@return the maximum X value in data units*/
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virtual double x2() const { return DataRect.x2(); }
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/**@return the minimum Y value in data units*/
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virtual double y() const { return DataRect.y(); }
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/**@return the maximum Y value in data units*/
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virtual double y2() const { return DataRect.y2(); }
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/**@return the width in data units*/
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virtual double dataWidth() const { return DataRect.width(); }
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/**@return the height in data units*/
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virtual double dataHeight() const { return DataRect.height(); }
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/**@short Add an item to the list of KPlotObjects to be plotted.
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*@param o pointer to the KPlotObject to be added
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*/
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virtual void addObject( KPlotObject *o ) { ObjectList.append( o ); }
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/**@short Remove all items from the list of KPlotObjects
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*/
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virtual void clearObjectList() { ObjectList.clear(); update(); }
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/**@short replace an item in the KPlotObject list.
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*@param i the index of th item to be replaced
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*@param o pointer to the replacement KPlotObject
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*/
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virtual void replaceObject( int i, KPlotObject *o ) { ObjectList.replace( i, o ); }
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/**@return the number of KPlotObjects in the list
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*/
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virtual int objectCount() const { return ObjectList.count(); }
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/**@return a pointer to a specific KPlotObject in the list
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*@param i the index of the desired KPlotObject
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*/
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virtual KPlotObject *object( int i ) { return ObjectList.at(i); }
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/**@return the background color */
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virtual TQColor bgColor() const { return cBackground; }
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/**@return the foreground color */
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virtual TQColor fgColor() const { return cForeground; }
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/**@return the grid color */
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virtual TQColor gridColor() const { return cGrid; }
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/**@short set the background color
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*@param bg the new background color
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*/
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virtual void setBGColor( const TQColor &bg ) { cBackground = bg; setBackgroundColor( bg ); }
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/**@short set the foreground color
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*@param fg the new foreground color
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*/
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virtual void setFGColor( const TQColor &fg ) { cForeground = fg; }
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/**@short set the grid color
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*@param gc the new grid color
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*/
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virtual void setGridColor( const TQColor &gc ) { cGrid = gc; }
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/**@short toggle whether plot axes are drawn.
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*@param show if true, axes will be drawn.
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*The axes are just a box outline around the plot.
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*/
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virtual void setShowAxes( bool show ) { BottomAxis.setVisible(show); LeftAxis.setVisible(show); }
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/**@short toggle whether tick marks are drawn along the axes.
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*@param show if true, tick marks will be drawn.
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*/
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virtual void setShowTickMarks( bool show ) { ShowTickMarks = show; }
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/**@short toggle whether tick labels are drawn at major tickmarks.
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*@param show if true, tick labels will be drawn.
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*/
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virtual void setShowTickLabels( bool show ) { ShowTickLabels = show; }
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/**@short toggle whether grid lines are drawn at major tickmarks.
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*@param show if true, grid lines will be drawn.
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*/
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virtual void setShowGrid( bool show ) { ShowGrid = show; }
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/**@short (Deprecated) Sets the X-axis label
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*@param xlabel a short string describing the data plotted on the x-axis.
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*Set the label to an empty string to omit the axis label.
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*This function is deprecated, set the label property in the BottomAxis directly.
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*/
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virtual void setXAxisLabel( TQString xlabel ) { BottomAxis.setLabel(xlabel); }
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/**@short (Deprecated) Sets the Y-axis label
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*@param ylabel a short string describing the data plotted on the y-axis.
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*Set the label to an empty string to omit the axis label.
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*This function is deprecated, set the label property in the LeftAxis directly.
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*/
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virtual void setYAxisLabel( TQString ylabel ) { LeftAxis.setLabel(ylabel); }
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/**@returns the number of pixels to the left of the plot area. Padding values
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*are set to -1 by default; if unchanged, this function will try to guess
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*a good value, based on whether ticklabels and/or axis labels are to be drawn.
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*/
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virtual int leftPadding() const;
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/**@returns the number of pixels to the right of the plot area.
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*Padding values are set to -1 by default; if unchanged, this function will try to guess
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*a good value, based on whether ticklabels and/or axis labels are to be drawn.
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*/
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virtual int rightPadding() const;
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/**@returns the number of pixels above the plot area.
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*Padding values are set to -1 by default; if unchanged, this function will try to guess
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*a good value, based on whether ticklabels and/or axis labels are to be drawn.
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*/
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virtual int topPadding() const;
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/**@returns the number of pixels below the plot area.
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*Padding values are set to -1 by default; if unchanged, this function will try to guess
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*a good value, based on whether ticklabels and/or axis labels are to be drawn.
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*/
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virtual int bottomPadding() const;
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/**@short set the number of pixels to the left of the plot area.
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*Set this to -1 to revert to automatic determination of padding values.
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*/
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virtual void setLeftPadding( int pad ) { LeftPadding = pad; }
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/**@short set the number of pixels to the right of the plot area.
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*Set this to -1 to revert to automatic determination of padding values.
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*/
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virtual void setRightPadding( int pad ) { RightPadding = pad; }
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/**@short set the number of pixels above the plot area.
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*Set this to -1 to revert to automatic determination of padding values.
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*/
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virtual void setTopPadding( int pad ) { TopPadding = pad; }
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/**@short set the number of pixels below the plot area.
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*Set this to -1 to revert to automatic determination of padding values.
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*/
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virtual void setBottomPadding( int pad ) { BottomPadding = pad; }
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/**@short revert all four padding values to be automatically determined. */
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virtual void setDefaultPadding() { LeftPadding = -1; RightPadding = -1; TopPadding = -1; BottomPadding = -1; }
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/**@short The bottom X axis. */
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KPlotAxis BottomAxis;
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/**@short The left Y axis. */
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KPlotAxis LeftAxis;
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protected:
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/**@short the paint event handler, executed when update() or tqrepaint() is called.
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*/
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virtual void paintEvent( TQPaintEvent* /* e */ );
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/**@short the resize event handler, called when the widget is resized.
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*/
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virtual void resizeEvent( TQResizeEvent* /* e */ );
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/**@short draws all of the objects onto the widget. Internal use only; one should simply call update()
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*to draw the widget with axes and all objects.
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*@param p pointer to the painter on which we are drawing
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*/
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virtual void drawObjects( TQPainter *p );
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/**@short draws the plot axes and axis labels. Internal use only; one should simply call update()
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*to draw the widget with axes and all objects.
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*@param p pointer to the painter on which we are drawing
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*/
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virtual void drawBox( TQPainter *p );
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/**@short modulus function for double variables.
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*For example, dmod( 17.0, 7.0 ) returns 3.0
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*@return the remainder after dividing b into a.
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*/
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double dmod( double a, double b );
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//The distance between major tickmarks in data units
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double dXtick, dYtick;
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//The number of major and minor tickmarks to be plotted in X and Y
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int nmajX, nminX, nmajY, nminY;
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//Limits of the plot area in pixel units
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TQRect PixRect;
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//Limits of the plot area in data units
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DRect DataRect;
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//List of KPlotObjects
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TQPtrList<KPlotObject> ObjectList;
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//Colors
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TQColor cBackground, cForeground, cGrid;
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//draw options
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bool ShowTickMarks, ShowTickLabels, ShowGrid;
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//padding
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int LeftPadding, RightPadding, TopPadding, BottomPadding;
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TQPixmap *buffer;
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};
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#endif
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