jcsp.awt
Class GraphicsCommand

java.lang.Object
  |
  +--jcsp.lang.TaggedProtocol
        |
        +--jcsp.awt.GraphicsCommand

Direct Known Subclasses:

GraphicsCommand.ClearRect, GraphicsCommand.ClipRect, GraphicsCommand.CopyArea, GraphicsCommand.Draw3DRect, GraphicsCommand.DrawArc, GraphicsCommand.DrawBytes, GraphicsCommand.DrawChars, GraphicsCommand.DrawImage, GraphicsCommand.DrawLine, GraphicsCommand.DrawOval, GraphicsCommand.DrawPolygon, GraphicsCommand.DrawPolyline, GraphicsCommand.DrawRect, GraphicsCommand.DrawRoundRect, GraphicsCommand.DrawString, GraphicsCommand.Fill3DRect, GraphicsCommand.FillArc, GraphicsCommand.FillOval, GraphicsCommand.FillPolygon, GraphicsCommand.FillRect, GraphicsCommand.FillRoundRect, GraphicsCommand.General, GraphicsCommand.SetClip, GraphicsCommand.SetColor, GraphicsCommand.SetFont, GraphicsCommand.SetXORMode, GraphicsCommand.Translate

public abstract class GraphicsCommand

extends TaggedProtocol

This is the tagged protocol interpreted by objects (such as DisplayList) that implement the Display interface.

Description

GraphicsCommand is the tagged protocol interpreted by objects (such as DisplayList) that implement the Display interface. It is a collection of static graphics command classes and a couple of immutable graphics command objects. The constructors for each command class set the parameters for the command. The immutable objects are commands that take no parameters.

A Display object provides a secure interface between an active user process and an active graphics component (such as ActiveCanvas). It enables all methods of java.awt.graphics to be executed on the active graphics component. User processes send an array of GraphicsCommands by invoking set, extend or change on the Display.

The meaning of each command is defined by the corresponding method in java.awt.graphics. For example, the GraphicsCommand.DrawImage constructors correspond to the java.awt.graphics.drawImage methods.

Author:

P.H.Welch

See Also:

Display, DisplayList, ActiveCanvas

Inner Class Summary

static class	GraphicsCommand.ClearRect This is the (immutable) command object for java.awt.Graphics.clearRect.
static class	GraphicsCommand.ClipRect This is the (immutable) command object for java.awt.Graphics.clipRect.
static class	GraphicsCommand.CopyArea This is the (immutable) command object for java.awt.Graphics.copyArea.
static class	GraphicsCommand.Draw3DRect This is the (immutable) command object for java.awt.Graphics.draw3DRect.
static class	GraphicsCommand.DrawArc This is the (immutable) command object for java.awt.Graphics.drawArc.
static class	GraphicsCommand.DrawBytes This is the (immutable) command object for java.awt.Graphics.drawBytes.
static class	GraphicsCommand.DrawChars This is the (immutable) command object for java.awt.Graphics.drawChars.
static class	GraphicsCommand.DrawImage This is the (immutable) command object for java.awt.Graphics.drawImage.
static class	GraphicsCommand.DrawLine This is the (immutable) command object for java.awt.Graphics.drawLine.
static class	GraphicsCommand.DrawOval This is the (immutable) command object for java.awt.Graphics.drawOval.
static class	GraphicsCommand.DrawPolygon This is the (immutable) command object for java.awt.Graphics.drawPolygon.
static class	GraphicsCommand.DrawPolyline This is the (immutable) command object for java.awt.Graphics.drawPolyline.
static class	GraphicsCommand.DrawRect This is the (immutable) command object for java.awt.Graphics.drawRect.
static class	GraphicsCommand.DrawRoundRect This is the (immutable) command object for java.awt.Graphics.drawRoundRect.
static class	GraphicsCommand.DrawString This is the (immutable) command object for java.awt.Graphics.drawString.
static class	GraphicsCommand.Fill3DRect This is the (immutable) command object for java.awt.Graphics.translate.
static class	GraphicsCommand.FillArc This is the (immutable) command object for java.awt.Graphics.fillArc.
static class	GraphicsCommand.FillOval This is the (immutable) command object for java.awt.Graphics.fillOval.
static class	GraphicsCommand.FillPolygon This is the (immutable) command object for java.awt.Graphics.fillPolygon.
static class	GraphicsCommand.FillRect This is the (immutable) command object for java.awt.Graphics.fillRect.
static class	GraphicsCommand.FillRoundRect This is the (immutable) command object for java.awt.Graphics.fillRoundRect.
static class	GraphicsCommand.General This is the command object holding a GraphicsCommand.Graphic object implementing an arbitrary set of graphics operations.
static interface	GraphicsCommand.Graphic This is the interface allowing any set of Graphics operations to be wrapped up in an object and sent down a Display channel to an Active graphics component.
static class	GraphicsCommand.SetClip This is the (immutable) command object for java.awt.Graphics.setClip.
static class	GraphicsCommand.SetColor This is the (immutable) command object for java.awt.Graphics.setColor.
static class	GraphicsCommand.SetFont This is the (immutable) command object for java.awt.Graphics.setFont.
static class	GraphicsCommand.SetXORMode This is the (immutable) command object for java.awt.Graphics.setXORMode.
static class	GraphicsCommand.Translate This is the (immutable) command object for java.awt.Graphics.translate.

Field Summary

static GraphicsCommand	NULL This is the null command whose interpretation is a no-op.
static GraphicsCommand	SET_PAINT_MODE This is the (immutable) command object for java.awt.Graphics.setPaintMode.

Fields inherited from class jcsp.lang.TaggedProtocol

tag

Methods inherited from class java.lang.Object

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

Field Detail

NULL

public static final GraphicsCommand NULL

This is the null command whose interpretation is a no-op.

SET_PAINT_MODE

public static final GraphicsCommand SET_PAINT_MODE

This is the (immutable) command object for java.awt.Graphics.setPaintMode.