Package org.jcsp.awt
Class GraphicsProtocol
- java.lang.Object
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- org.jcsp.lang.TaggedProtocol
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- org.jcsp.awt.GraphicsProtocol
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- Direct Known Subclasses:
GraphicsProtocol.General
,GraphicsProtocol.MakeMISImage
,GraphicsProtocol.SetBackground
,GraphicsProtocol.SetPaintable
public abstract class GraphicsProtocol extends TaggedProtocol
This is the tagged protocol for use over the toGraphics configuration channel of an active graphics component.Description
GraphicsProtocol is the tagged protocol for use over the toGraphics configuration channel of an active graphics component (for example, seeActiveCanvas.setGraphicsChannels
).It is a collection of static immutable enquiry/configuration objects and static configuration classes. An enquiry sent down the toGraphics channel generates an appropriate reply on the fromGraphics channel. A configuration class may be used to construct an immutable configuration object that may be sent down the toGraphics channel to configure some property of the graphics component. A configuration message is always acknowledged with a Boolean.TRUE returned on the fromGraphics channel (once the configuration has happened).
- Author:
- P.H. Welch
- See Also:
ActiveCanvas
,TaggedProtocol
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Nested Class Summary
Nested Classes Modifier and Type Class Description static interface
GraphicsProtocol.Configure
This is the interface for general configuration of the graphics component.static class
GraphicsProtocol.General
This is a general configuration class for the graphics component.static class
GraphicsProtocol.MakeMISImage
This is a configuration class to associate a java.awt.image.MemoryImageSource with the graphics component.static class
GraphicsProtocol.SetBackground
This is a configuration class for setting the background java.awt.Color of the active graphics component.static class
GraphicsProtocol.SetPaintable
This is a configuration class to register a org.jcsp.awt.Paintable object with the graphics component.
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Field Summary
Fields Modifier and Type Field Description static GraphicsProtocol
GET_BACKGROUND
This is an enquiry object to find the background colour of the active graphics component.static GraphicsProtocol
GET_COMPONENT
This is an enquiry object to obtain the active graphics component.static GraphicsProtocol
GET_DIMENSION
This is an enquiry object to find the size of the active graphics component.static GraphicsProtocol
REQUEST_FOCUS
This is a configuration object to request input focus on the graphics component for keyboard and mouse evnts.-
Fields inherited from class org.jcsp.lang.TaggedProtocol
tag
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Field Detail
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GET_DIMENSION
public static final GraphicsProtocol GET_DIMENSION
This is an enquiry object to find the size of the active graphics component. The java.awt.Dimension will be returned down the fromGraphics channel.
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GET_COMPONENT
public static final GraphicsProtocol GET_COMPONENT
This is an enquiry object to obtain the active graphics component. The java.awt.Component will be returned down the fromGraphics channel.
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GET_BACKGROUND
public static final GraphicsProtocol GET_BACKGROUND
This is an enquiry object to find the background colour of the active graphics component. The background java.awt.Color will be returned down the fromGraphics channel.
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REQUEST_FOCUS
public static final GraphicsProtocol REQUEST_FOCUS
This is a configuration object to request input focus on the graphics component for keyboard and mouse evnts. A Boolean.TRUE will be returned down the fromGraphics channel.
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