Package org.jcsp.awt

Class GraphicsProtocol

java.lang.Object

org.jcsp.lang.TaggedProtocol

org.jcsp.awt.GraphicsProtocol

Direct Known Subclasses:

GraphicsProtocol.General, GraphicsProtocol.GetBackground, GraphicsProtocol.GetComponent, GraphicsProtocol.GetDimension, GraphicsProtocol.MakeMISImage, GraphicsProtocol.RequestFocus, 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, see ActiveCanvas.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).

See Also:

ActiveCanvas, TaggedProtocol

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.
private static class	GraphicsProtocol.GetBackground
private static class	GraphicsProtocol.GetComponent
private static class	GraphicsProtocol.GetDimension
static class	GraphicsProtocol.MakeMISImage	This is a configuration class to associate a java.awt.image.MemoryImageSource with the graphics component.
private static class	GraphicsProtocol.RequestFocus
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.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static int	GENERAL_TAG
static GraphicsProtocol	GET_BACKGROUND	This is an enquiry object to find the background colour of the active graphics component.
(package private) static int	GET_BACKGROUND_TAG
static GraphicsProtocol	GET_COMPONENT	This is an enquiry object to obtain the active graphics component.
(package private) static int	GET_COMPONENT_TAG
static GraphicsProtocol	GET_DIMENSION	This is an enquiry object to find the size of the active graphics component.
(package private) static int	GET_DIMENSION_TAG
(package private) static int	MAKE_MIS_IMAGE_TAG
static GraphicsProtocol	REQUEST_FOCUS	This is a configuration object to request input focus on the graphics component for keyboard and mouse evnts.
(package private) static int	REQUEST_FOCUS_TAG
(package private) static int	SET_BACKGROUND_TAG
(package private) static int	SET_PAINTABLE_TAG

Fields inherited from class org.jcsp.lang.TaggedProtocol

tag

Constructor Summary

Constructors

Constructor	Description
GraphicsProtocol(int tag)

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

GET_DIMENSION_TAG

static final int GET_DIMENSION_TAG

See Also:

Constant Field Values

GET_COMPONENT_TAG

static final int GET_COMPONENT_TAG

See Also:

Constant Field Values

GET_BACKGROUND_TAG

static final int GET_BACKGROUND_TAG

See Also:

Constant Field Values

SET_BACKGROUND_TAG

static final int SET_BACKGROUND_TAG

See Also:

Constant Field Values

REQUEST_FOCUS_TAG

static final int REQUEST_FOCUS_TAG

See Also:

Constant Field Values

MAKE_MIS_IMAGE_TAG

static final int MAKE_MIS_IMAGE_TAG

See Also:

Constant Field Values

SET_PAINTABLE_TAG

static final int SET_PAINTABLE_TAG

See Also:

Constant Field Values

GENERAL_TAG

static final int GENERAL_TAG

See Also:

Constant Field Values

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.

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.

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.

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.

Constructor Detail

GraphicsProtocol

GraphicsProtocol(int tag)