DialLayer
| org.jfree.chart.plot.dial.DialLayer |
 Known Indirect Subclasses
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Class Overview
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.
Summary
| Public Methods | |||||||||||
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Registers a listener with this layer, so that it receives notification
of changes to this layer.
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Draws the content of this layer.
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Returns
true if the specified listener is currently
registered with the this layer. | |||||||||||
Returns
true if the drawing should be clipped to the
dial window (which is defined by the DialFrame), and
false otherwise. | |||||||||||
Returns a flag that indicates whether or not the layer is visible.
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Deregisters a listener, so that it no longer receives notification of
changes to this layer.
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Public Methods
public abstract void addChangeListener (DialLayerChangeListener listener)
Registers a listener with this layer, so that it receives notification of changes to this layer.
Parameters
| listener | the listener. |
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public abstract void draw (Graphics2D g2, DialPlot plot, Rectangle2D frame, 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).
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public abstract boolean hasListener (EventListener listener)
Returns true if the specified listener is currently
registered with the this layer.
Parameters
| listener | the listener. |
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Returns
- A boolean.
public abstract 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.
public abstract boolean isVisible ()
Returns a flag that indicates whether or not the layer is visible.
Returns
- A boolean.
public abstract void removeChangeListener (DialLayerChangeListener listener)
Deregisters a listener, so that it no longer receives notification of changes to this layer.
Parameters
| listener | the listener. |
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