drawer

Class Drawer

java.lang.Object

drawer.Drawer

public abstract class Drawer
extends java.lang.Object

The Drawer is what actually creates the graphical representation of the plot states for display on the screen. There are overloaded functions that take specific types of plot states. Plot states typically call drawPlotBackground first, which draws the plot's frame (titles, labels, tick marks, grid). Then they call drawCurve for each of their curves, passing in a separate graphics object from the screen one. This offscreen buffer is usually larger, than is visible, to make panning more efficient.

Author:

Clinic 08-09, modified by Clinic 10-11, Max Comstock 2013

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_GRID_SPACING Vertical padding for y-axis labels
static int	MIN_GRID_SPACING Vertical padding for y-axis labels

Constructor Summary

Constructors

Constructor and Description
Drawer()

Method Summary

Methods

Modifier and Type	Method and Description
static void	draw3DCurve(Plot3DState state, Curve c, ODEVar x, ODEVar y, ODEVar z) Draws a curve on a 3D Plot Panel in the specified color.
static void	draw3DEquilibrium(Plot3DState state, Equilibrium e, ODEVar x, ODEVar y, ODEVar z) Draws a Equilibrium on a 3D Plot Panel in the specified color.
static void	drawCurve(Curve c, ODEVar x, ODEVar y, java.awt.Graphics offscreenPlot, PlotState state, java.awt.Rectangle viewingWindow) Draws a set of solution curves on the given virtual image.
static void	drawDirField(java.awt.Graphics graphics, SinglePlotState state, java.awt.Rectangle viewingWindow) Draw a direction field on the current plot object for the given ODE.
static void	drawEquilibrium(Equilibrium e, ODEVar x, ODEVar y, java.awt.Graphics offscreenPlot, PlotState state, java.awt.Rectangle viewingWindow) Draws Equilibrium on the given virtual image.
static java.awt.Rectangle	drawPlotBackground(java.awt.Graphics graphics, PlotState state) This is the publicly accessible function for drawing the plot box, its border, the title and axis labels, and the tick marks and tick labels--i.e.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MIN_GRID_SPACING

public static final int MIN_GRID_SPACING

Vertical padding for y-axis labels

See Also:

Constant Field Values

MAX_GRID_SPACING

public static final int MAX_GRID_SPACING

Vertical padding for y-axis labels

See Also:

Constant Field Values

Constructor Detail

Drawer

public Drawer()

Method Detail

drawPlotBackground

public static java.awt.Rectangle drawPlotBackground(java.awt.Graphics graphics,
                                    PlotState state)

This is the publicly accessible function for drawing the plot box, its border, the title and axis labels, and the tick marks and tick labels--i.e. everything except the curves themselves.

Parameters:

graphics - The graphics context on which to draw

state - The plot state to draw

Returns:

the Rectangle defining the viewing range

drawCurve

public static void drawCurve(Curve c,
             ODEVar x,
             ODEVar y,
             java.awt.Graphics offscreenPlot,
             PlotState state,
             java.awt.Rectangle viewingWindow)

Draws a set of solution curves on the given virtual image.

Parameters:

c - The curve to be drawn

x - Which curve variable is the independent one

y - Which curve variable is the dependent one

offscreenPlot - The offscreen image buffer

state - The plot state which will display the curve

viewingWindow - The area available for display

drawEquilibrium

public static void drawEquilibrium(Equilibrium e,
                   ODEVar x,
                   ODEVar y,
                   java.awt.Graphics offscreenPlot,
                   PlotState state,
                   java.awt.Rectangle viewingWindow)

Draws Equilibrium on the given virtual image.

Parameters:

e - The Equilibrium to be drawn

x - Which Equilibrium variable is the independent one

y - Which Equilibrium variable is the dependent one

offscreenPlot - The offscreen image buffer

state - The plot state which will display the curve

viewingWindow - The area available for display

draw3DCurve

public static void draw3DCurve(Plot3DState state,
               Curve c,
               ODEVar x,
               ODEVar y,
               ODEVar z)

Draws a curve on a 3D Plot Panel in the specified color. Note that buffering is not implemented in 3D.

Parameters:

state - Plot3DState representing the Plot Panel to draw on

c - Curve to be drawn

x - The variable corresponding to the x-axis

y - The variable corresponding to the y-axis

z - The variable corresponding to the z-axis

draw3DEquilibrium

public static void draw3DEquilibrium(Plot3DState state,
                     Equilibrium e,
                     ODEVar x,
                     ODEVar y,
                     ODEVar z)

Draws a Equilibrium on a 3D Plot Panel in the specified color. Note that buffering is not implemented in 3D.

Parameters:

state - Plot3DState representing the Plot Panel to draw on

e - Equilibrium to be drawn

x - The variable corresponding to the x-axis

y - The variable corresponding to the y-axis

z - The variable corresponding to the z-axis

drawDirField

public static void drawDirField(java.awt.Graphics graphics,
                SinglePlotState state,
                java.awt.Rectangle viewingWindow)

Draw a direction field on the current plot object for the given ODE. Performs a check to see if the direction field can be plotted for the requested variables. If it cannot, then a non-zero value is returned.

Parameters:

graphics - graphics object to display direction field on.

state - the plot to draw the direction field for.

viewingWindow - The area available for display