Package edu.hws.jcm.draw
Class Graph1D
- java.lang.Object
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- edu.hws.jcm.draw.Drawable
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- edu.hws.jcm.draw.Graph1D
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- All Implemented Interfaces:
Computable
,java.io.Serializable
public class Graph1D extends Drawable implements Computable
A Graph1D represents the graph of a function of one variable, to be displayed in a given CoordinateRect. A Graph1D is a Computable. The data for the graph is recomputed when its compute() method is called. It will also be recomputed, before it is drawn, if the coordinate rect has changed in some way.- See Also:
- Serialized Form
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
compute()
Recompute data for the graph and make sure that the area of the display canvas that shows the graph is redrawn.void
draw(java.awt.Graphics g, boolean coordsChanged)
Draw the graph (possibly recomputing the data if the CoordinateRect has changed).java.awt.Color
getColor()
Get the color that is used to draw the graph.Function
getFunction()
Get the (possibly null) function whose graph is drawn.void
setColor(java.awt.Color c)
Set the color to be used for drawing the graph.void
setFunction(Function f)
Set the function to be graphed.-
Methods inherited from class edu.hws.jcm.draw.Drawable
getVisible, needsRedraw, setOwnerData, setVisible
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Constructor Detail
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Graph1D
public Graph1D()
Create a Graph1D with no function to graph. One can be set later with setFunction();
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Graph1D
public Graph1D(Function func)
Create a graph of the specified function.- Parameters:
func
- The function to be graphed. If func is null, nothing is drawn. If func is non-null, it must be a function of one variable.
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Method Detail
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setColor
public void setColor(java.awt.Color c)
Set the color to be used for drawing the graph. The default color is magenta.
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getColor
public java.awt.Color getColor()
Get the color that is used to draw the graph.
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setFunction
public void setFunction(Function f)
Set the function to be graphed. If it is null, nothing is drawn. If it is non-null, it must be a function of one variable, or an error will occur.
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getFunction
public Function getFunction()
Get the (possibly null) function whose graph is drawn.
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compute
public void compute()
Recompute data for the graph and make sure that the area of the display canvas that shows the graph is redrawn. This method is ordinarily called by a Controller.- Specified by:
compute
in interfaceComputable
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draw
public void draw(java.awt.Graphics g, boolean coordsChanged)
Draw the graph (possibly recomputing the data if the CoordinateRect has changed). This is not usually called directly.- Specified by:
draw
in classDrawable
- Parameters:
g
- The graphics context in which the Drawble is to be drawn. (The drawing can change the color in g, but should not permanently change font, painting mode, etc. Thus, every drawable is responsible for setting the color it wants to use.)coordsChanged
- Indicates whether the CoordinateRect has changed.
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