PTOLEMY II - CiteSeerX

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CompositeActor ptolemy.gui.BasicJApplet «Interface» ExecutionListener +executionError(m : Manager, ex : Exception) +executionFinished(m : Manager) +managerStateChanged(m : Manager) MoMLParser +parse(base : URL, in : InputStream) 1..1 creates uses PtolemyApplet +background : applet parameter +controls : applet parameter +modelClass : applet parameter +orientation : applet parameter #_manager : Manager #_setupOK : boolean #_toplevel : NamedObj #_workspace : Workspace +PtolemyApplet() #_createModel(workspace : Workspace) : NamedObj #_createView() #_go() #_stop() MoMLApplet +modelURL : applet parameter +MoMLApplet() +_createModel(w : Workspace, filterGraphicalClasses : boolean) creates Custom Applets FIGURE 8.1. UML static structure diagram for PtolemyApplet, a convenience class for constructing applets. PtolemyApplet is in the ptolemy.actor.gui package. it is "vertical", then the controls are placed above the visual elements of the Placeable actors. This is the default. If it is "horizontal", then the controls are placed to the left of the visual elements. If it is "controls_only" then no visual elements are placed. The use of these applet parameters is explained in more detail below. 8.2 HTML Files Containing Applets An applet is a Java class that can be referenced by an HTML file and accessed either locally or over the web and run in a secure manner on the local machine in a web browser. Unfortunately, many browsers available today are shipped with an earlier version of Java that does not provide features that Ptolemy II requires. The work around is to use Sun’s Java Plug-In, which invokes the 1.4 version of the Java Runtime Environment (JRE), instead of the default Java runtime that is shipped with the browser. The Java Plug-in is installed when the JRE or the Java Development Kit (JDK) is installed. Unfortunately, using the Java Plug-in makes the applet HTML more complex. There are two choices: 1. Use fairly complex JavaScript to determine which browser is running and then to properly select one of three different ways to invoke the Java Plug-in. This method works on the most different types of platforms and browsers. The JavaScript is so complex, that rather than reproduce it here, please see one of the demonstration html files such as $PTII/ptolemy/domains/sdf/demo/Butterfly/ Butterfly.htm. Sun provides a free tool called HTMLConverter that will automatically generate the 234 Ptolemy II JPanel ModelPane
Custom Applets html code, see the Java Plug-in home page at http://java.sun.com/products/plugin/. 2. Use the much simpler ... tag to invoke the Java Plug-in. This method works on many platforms and browsers, but requires a more recent version of the Java Plug-in, and will not work under Netscape Communicator 4.x. However, all is not lost for Netscape Communicator 4.x users, since the appletviewer command that is included with the Java Development kit will display applets written using the simpler format. For details about the above two choices, see http://java.sun.com/products/plugin/versions.html. Sample HTML for the . . . style of custom applet is shown in figure 8.2. An HTML file containing the segment shown in figure 8.2 can be found in $PTII/doc/tutorial/ TutorialApplet1.htm, where $PTII is the home directory of the Ptolemy II installation. Also in that directory are a number of sample Java files for applets, each named TutorialAppletn.java, where n is an integer starting with 1. These files contain a series of applet definitions, each with increasing sophistication, that are discussed below. Each applet has a corresponding TutorialAppletn.htm file. Since our example applets are in a directory $PTII/doc/tutorial, the codebase for the applet is “../..” in figure 8.2, which is the directory $PTII. This permits the applets to refer to any class in the Ptolemy II tree. There are some parameters in the HTML in figure 8.2 that you may want to change. The width and the height, for example, specify the amount of space on the screen that the browser gives to the applet. 8.3 Defining a Model in a Java File PtolemyApplet supports two techniques for instantiating models: 1. The model can be defined as a Java class that extends NamedObj, with the class name given by the modelClass applet parameter in the HTML file. 2. The model can be defined as a Java class that extends PtolemyApplet and overrides the protected method _createModel() to create the model, and optionally overrides the _createView() method to create the visual display for the model. The first of these is simpler, so we begin by explaining this technique. 8.3.1 A Model Class as a Composite Actor If the model is defined in a Java class that extends NamedObj, then we can use the modelClass applet parameter to pass the class name to PtolemyApplet and invoke the PtolemyApplet code from \ No Java Plug-in support for applet, see http://java.sun.com/products/plugin/ FIGURE 8.2. An HTML segment that invokes the Java 1.4 Plug-in under both most browser, except Netscape 4.x. This text can be found in $PTII/doc/tutorial/TutorialApplet1.htm. Heterogeneous Concurrent Modeling and Design 8-235
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PTOLEMY II HETEROGENEOUS CONCURRENT
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VOLUME 1 INTRODUCTION TO PTOLEMY II
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Volume 1 Contents Introduction to P
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2.10.3. Constructing Modal Models 8
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7. MoML 191 7.1. Introduction 191 7
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1 Introduction Author: Edward A. Le
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Introduction heterochronous dataflo
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Introduction A major emphasis in Pt
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Introduction determine when actors
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Introduction provides levels of vis
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Introduction is a guard, and the se
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Introduction well. All of these are
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Introduction clients to update thei
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Introduction will be supplied with
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Introduction 1.3.12 Synchronous Dat
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Introduction FIGURE 1.10. Refinemen
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Introduction occlusions due to terr
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Introduction tion. The overall arch
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Introduction kernel.attributes This
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Introduction 1.5.2 Overview of Key
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Introduction Actor interfaces are k
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Heterogeneous Concurrent Modeling a
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Introduction actor actor.gui data.e
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Introduction cient, scalable, and u
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Introduction 1.5.8 Future Capabilit
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Introduction Appendix A: UML — Un
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Introduction grams, the only constr
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2 Using Vergil Authors: Edward A. L
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Using Vergil 2.2.2 Executing a Pre-
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Using Vergil The Lorenz attractor m
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Using Vergil The Continuous-Time (C
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Using Vergil box in figure 2.11. En
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Using Vergil Don’t panic! Excepti
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Using Vergil tions are a normal par
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Using Vergil 2.4 Hierarchy Ptolemy
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Using Vergil Then using these ports
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Using Vergil the default 0.1 to 0.0
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Using Vergil pan window, it is easy
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Using Vergil FIGURE 2.33. The pan w
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Using Vergil we have modified the c
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Using Vergil model, simply copy (or
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Using Vergil A key issue is to deci
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Using Vergil instances. This proble
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Using Vergil quick tour for more de
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Using Vergil uses the index in the
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Using Vergil AddSubtract actor, and
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Using Vergil If you look inside the
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Using Vergil If you look inside the
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Using Vergil transition (or right c
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Using Vergil Once you have created
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Using Vergil The grid is turned off
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Authors: Edward A. Lee Xiaojun Liu
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Expressions classes to create a gen
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Expressions The % operation is a mo
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Expressions attribute, which includ
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Expressions 3.3.5 State Machines Ex
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Expressions whose value is an array
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Expressions from it. For instance,
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Expressions defined. For example, >
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Expressions length is given by the
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Expressions Thus, for example, you
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Expressions number. With one additi
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Expressions value. For example, fix
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Expressions In the example in figur
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Expressions A.2 Basic Mathematical
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Expressions A.3 Matrix, Array, and
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Expressions A.5 Signal Processing F
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Expressions TABLE 8: Functions perf
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4 Actor Libraries Authors: Elaine C
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Actor Libraries properly in the CT
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Actor Libraries ing that multiple c
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Actor Libraries TypedAtomicActor «
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Actor Libraries SequenceScope (exte
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Actor Libraries UnsignedByteArrayTo
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Actor Libraries MobileFunction (ext
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Actor Libraries LogicFunction (exte
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Actor Libraries Sleep (extends Tran
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Actor Libraries VariableFIR (extend
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Actor Libraries Integrator: Integra
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Actor Libraries Figure 4.4 shows th
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5 Designing Actors Authors: Christo
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Designing Actors /** Javadoc commen
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Designing Actors although with most
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Designing Actors import ptolemy.act
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Designing Actors makes such actors
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Designing Actors same parameter val
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Designing Actors morphic actor comp
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Designing Actors To get data polymo
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Designing Actors public class Seque
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Designing Actors be used in domains
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Designing Actors alComm actor. Beca
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Designing Actors attribute has valu
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Designing Actors import ptolemy.act
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6 Coding Style Authors: Christopher
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Coding Style /* One line descriptio
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Coding Style Copyright (c) 2004 The
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Page 201 and 202: Authors: Edward A. Lee Steve Neuend
Page 203 and 204: MoML cutes it forever, until you hi
Page 205 and 206: MoML A second difference between ou
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Page 209 and 210: MoML 7.3.3 Names and Classes Most M
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Page 215 and 216: MoML It is also sometimes necess
Page 217 and 218: MoML then there will be a link t
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Page 225 and 226: MoML 7.4.5 Deleting Entities, Relat
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Page 229 and 230: MoML model. The EntityLibrary class
Page 231 and 232: MoML Suppose that using incremental
Page 233 and 234: MoML Generate a sine wave.
Page 235 and 236: MoML
Page 237 and 238: MoML Number of iterations in
Page 239 and 240: MoML -P- The f
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Page 243: 8 Custom Applets Authors: Edward A.
Page 247 and 248: Custom Applets public class Tutoria
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Page 251 and 252: Custom Applets 8.3.5 Using Model Pa
Page 253 and 254: Custom Applets ptolemy/domains/doma
Page 255 and 256: References [1] G. Agha, Actors: A M
Page 257 and 258: [33] S. A. Edwards, “The Specific
Page 259 and 260: [67] E. Kohler, The Click Modular R
Page 261 and 262: [95] J. Liu, X. Liu, T. J. Koo, B.
Page 263 and 264: [132]W. R. Sutherland, "The on-Line
Page 265 and 266: Glossary abstract syntax ..........
Page 267 and 268: Ptolemy II ........................
Page 269 and 270: Index Symbols - in UML 41 # in UML
Page 271 and 272: coin flips 142 Color class 173 colo
Page 273 and 274: entity in XML 198 EntityLibrary cla
Page 275 and 276: Director class 159 inverse FFT 124
Page 277 and 278: CompositeEntity class 206 nextPower
Page 279 and 280: safety 34 SampleDelay actor 78, 138
Page 281 and 282: type constraint 155 type constraint
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