Class Plotter2

java.lang.Object
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  +--Plotter
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        +--Plotter2

class Plotter2

extends Plotter

A plotter augmented with extra methods to facilitate common tasks. This plotter can remember a viewport (a rectangle on the screen), and automatically supply the position and dimensions, simplifying coordinate transformations.

Field Summary

protected java.awt.Color	graphCol The colour to use when plotting the actual graph
protected int	h
protected int	hSpace
protected int	vSpace
protected int	w
protected int	x
protected int	y

Fields inherited from class Plotter

ABS_MAX, ABS_MIN, axes, bottomMargin, eqn, fold, foldSize, foldSym, infY, interpolate, log, majorTickSize, maxX, maxY, minorTickSize, minX, minY, noUnitsX, noUnitsY, rangeX, rangeY, soln, tickRatio, topMargin, viewLeft, viewRange, viewRight, xLabel, xScale, yLabel, yScale

Constructor Summary

Plotter2(Solvable eqn)
Creates a new plotter, with an empty (0,0,0,0) viewport

Plotter2(Solvable eqn, int x, int y, int w, int h)
Creates a new plotter

Method Summary

double	fromScreenX(int i) Converts an x value from screen space to graph space
double	fromScreenY(int i) Converts a y value from screen space to graph space
java.awt.Color	getGraphColor() Returns the colour used when plotting the actual graph
void	paint(java.awt.Graphics g) Paints this graph, with axes and scales (if appropriate) inside the viewport.
void	setGraphColor(java.awt.Color c) Sets the colour to use when plotting the actual graph
void	setMaxX(double d) Adjusts the maximum x value
void	setMaxY(double d) Adjusts the maximum y value
void	setMinX(double d) Adjusts the minimum x value
void	setMinY(double d) Adjusts the minimum y value
void	setRect(int x, int y, int w, int h) Sets the viewport for this plotter.
int	toScreenX(double d) Converts an x value from graph space to screen space
int	toScreenY(double d) Converts a y value from graph space to screen space
void	updateSolution(java.awt.Graphics g) Fills the cache with solution data.

Methods inherited from class Plotter

chooseTickSize, copyScale, fold, fromScreenX, fromScreenY, getMax, getMin, getSpaceX, getSpaceY, isInterpolated, isLogarithmic, labelAxisX, labelAxisY, paint, paintAxes, paintGraph, paintGraphFolded, paintLabelBelow, paintLabelToLeft, paintVerticalMarkers, scaleToFit, scaleToFit, setAxes, setFold, setFold, setFold, setInterpolated, setLabels, setLogarithmic, setRangeX, setRangeY, setScalesEnabled, setView, setViewAndRange, snap, squareValues, toScreenX, toScreenY, toString, updateSolution

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait

Field Detail

graphCol

protected java.awt.Color graphCol

The colour to use when plotting the actual graph

x

protected int x

y

protected int y

w

protected int w

h

protected int h

hSpace

protected int hSpace

vSpace

protected int vSpace

Constructor Detail

Plotter2

public Plotter2(Solvable eqn,
                int x,
                int y,
                int w,
                int h)

Creates a new plotter

Parameters:

eqn - The Solvable object to obtain solution data from

x - The x coordinate of the viewport

y - The y coordinate of the viewport

w - The width of the viewport

h - The height of the viewport

Plotter2

public Plotter2(Solvable eqn)

Creates a new plotter, with an empty (0,0,0,0) viewport

Parameters:

eqn - The Solvable object to obtain solution data from

Method Detail

paint

public void paint(java.awt.Graphics g)

Paints this graph, with axes and scales (if appropriate) inside the viewport.

Parameters:

g - The Graphics surface on which to paint

updateSolution

public void updateSolution(java.awt.Graphics g)

Fills the cache with solution data. The number of samples taken is equal to the width of the viewport, minus the width overhead for the vertical axis.

setRect

public void setRect(int x,
                    int y,
                    int w,
                    int h)

Sets the viewport for this plotter.

Parameters:

x - The x coordinate of the viewport

y - The y coordinate of the viewport

w - The width of the viewport

h - The height of the viewport

setMinY

public void setMinY(double d)

Adjusts the minimum y value

setMaxY

public void setMaxY(double d)

Adjusts the maximum y value

setMinX

public void setMinX(double d)

Adjusts the minimum x value

setMaxX

public void setMaxX(double d)

Adjusts the maximum x value

toScreenX

public int toScreenX(double d)

Converts an x value from graph space to screen space

toScreenY

public int toScreenY(double d)

Converts a y value from graph space to screen space

fromScreenX

public double fromScreenX(int i)

Converts an x value from screen space to graph space

fromScreenY

public double fromScreenY(int i)

Converts a y value from screen space to graph space

getGraphColor

public java.awt.Color getGraphColor()

Returns the colour used when plotting the actual graph

setGraphColor

public void setGraphColor(java.awt.Color c)

Sets the colour to use when plotting the actual graph