org.jfree.chart.plot.dial
Interface DialLayer

All Known Subinterfaces:

DialFrame, DialScale

All Known Implementing Classes:

AbstractDialLayer, ArcDialFrame, DialBackground, DialCap, DialPointer, DialTextAnnotation, DialValueIndicator, StandardDialFrame, StandardDialRange, StandardDialScale

public interface DialLayer

A dial layer draws itself within a reference frame. The view frame is a subset of the reference frame, and defines the area that is actually visible.

Classes that implement this interface should be Serializable, otherwise chart serialization may fail.

Method Summary

void	addChangeListener(DialLayerChangeListener listener) Registers a listener with this layer, so that it receives notification of changes to this layer.
void	draw(java.awt.Graphics2D g2, DialPlot plot, java.awt.geom.Rectangle2D frame, java.awt.geom.Rectangle2D view) Draws the content of this layer.
boolean	hasListener(java.util.EventListener listener) Returns true if the specified listener is currently registered with the this layer.
boolean	isClippedToWindow() Returns true if the drawing should be clipped to the dial window (which is defined by the DialFrame), and false otherwise.
boolean	isVisible() Returns a flag that indicates whether or not the layer is visible.
void	removeChangeListener(DialLayerChangeListener listener) Deregisters a listener, so that it no longer receives notification of changes to this layer.

Method Detail

isVisible

public boolean isVisible()

Returns a flag that indicates whether or not the layer is visible.

Returns:

A boolean.

addChangeListener

public void addChangeListener(DialLayerChangeListener listener)

Registers a listener with this layer, so that it receives notification of changes to this layer.

Parameters:

listener - the listener.

removeChangeListener

public void removeChangeListener(DialLayerChangeListener listener)

Deregisters a listener, so that it no longer receives notification of changes to this layer.

Parameters:

listener - the listener.

hasListener

public boolean hasListener(java.util.EventListener listener)

Returns true if the specified listener is currently registered with the this layer.

Parameters:

listener - the listener.

Returns:

A boolean.

isClippedToWindow

public boolean isClippedToWindow()

Returns true if the drawing should be clipped to the dial window (which is defined by the DialFrame), and false otherwise.

Returns:

A boolean.

draw

public void draw(java.awt.Graphics2D g2,
                 DialPlot plot,
                 java.awt.geom.Rectangle2D frame,
                 java.awt.geom.Rectangle2D view)

Draws the content of this layer.

Parameters:

g2 - the graphics target (null not permitted).

plot - the plot (typically this should not be null, but for a layer that doesn't need to reference the plot, it may be permitted).

frame - the reference frame for the dial's geometry (null not permitted). This is typically larger than the visible area of the dial (see the next parameter).

view - the visible area for the dial (null not permitted).