Examples of ptolemy.kernel.util.StringAttribute

ptolemy.kernel.util.StringAttribute
An attribute that has a string value. Use setExpression() to define the value, as in for example
```
 attribute.setExpression("xxx"); 
```
The default value of the string contained by this attribute is the empty string.
By default, an instance of this class is fully visible in a user interface. The visibility is indicated to the user interface when the user interface calls the getVisibility() method of this class and the value Settable.FULL is returned to the userInterface.
Note that the string value within StringAttribute cannot reference other StringAttributes or Parameters, so if an actor has a public StringAttribute, then one cannot make the value of that attribute dependent on a value higher in the hierarchy. Usually, actors have public ptolemy.data.expr.Parameters instead of public StringAttributes so that the value can reference other parameters. The primary reason to use StringAttribute is if you want a string that will not be parsed and you do not want to type a leading a trailing double quote. @see Settable#FULL @author Edward A. Lee @version $Id: StringAttribute.java,v 1.57 2006/09/16 11:20:46 eal Exp $ @since Ptolemy II 1.0 @Pt.ProposedRating Green (eal) @Pt.AcceptedRating Green (cxh)

                "tokenConsumptionRate");
        control_tokenConsumptionRate.setVisibility(Settable.NOT_EDITABLE);
        control_tokenConsumptionRate.setTypeEquals(BaseType.INT);


        // Put the control input on the bottom of the actor.
        StringAttribute controlCardinal = new StringAttribute(control,
                "_cardinal");
        controlCardinal.setExpression("SOUTH");
    }

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     */
    public Rotate2D(CompositeEntity container, String name)
            throws IllegalActionException, NameDuplicationException {
        super(container, name);


        angleType = new StringAttribute(this, "angleType");
        angleType.setExpression("radians");


        initialTheta = new Parameter(this, "initialTheta", new DoubleToken(0.0));
        initialTheta.setTypeEquals(BaseType.DOUBLE);

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            throws NameDuplicationException, IllegalActionException {
        super(container, name);


        impulse = new TypedIOPort(this, "impulse", true, false);
        impulse.setTypeEquals(BaseType.DOUBLE);
        StringAttribute cardinality = new StringAttribute(impulse, "_cardinal");
        cardinality.setExpression("SOUTH");


        derivative = new TypedIOPort(this, "derivative", true, false);
        derivative.setTypeEquals(BaseType.DOUBLE);


        state = new TypedIOPort(this, "state", false, true);
        state.setTypeEquals(BaseType.DOUBLE);


        initialState = new PortParameter(this, "initialState", new DoubleToken(
                0.0));
        initialState.setTypeEquals(BaseType.DOUBLE);
        cardinality = new StringAttribute(initialState.getPort(), "_cardinal");
        cardinality.setExpression("SOUTH");
    }

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        super(container, name);


        preferred = new TypedIOPort(this, "preferred", true, false);
        alternate = new TypedIOPort(this, "alternate", true, false);


        StringAttribute controlCardinal = new StringAttribute(alternate,
                "_cardinal");
        controlCardinal.setExpression("SOUTH");


        output = new TypedIOPort(this, "output", false, true);


        // Default type constraints are the right ones, so we need not
        // explicitly declare them here.

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        // Set the displayed name.  "_displayedName" is a specially
        // named attribute that is used in {@link
        // ptolemy.vergil.icon.ActorNameIcon} to display the value of
        // the attribute on the actor icon.
        displayedName = new StringAttribute(this, "_displayedName");
        displayedName.setExpression(name);
    }

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    public State(CompositeEntity container, String name)
            throws IllegalActionException, NameDuplicationException {
        super(container, name);
        incomingPort = new ComponentPort(this, "incomingPort");
        outgoingPort = new ComponentPort(this, "outgoingPort");
        refinementName = new StringAttribute(this, "refinementName");


        _attachText("_iconDescription", "<svg>\n"
                + "<circle cx=\"0\" cy=\"0\" r=\"20\" style=\"fill:white\"/>\n"
                + "</svg>\n");

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        // FIXME: Put in a name change from newServiceTime to serviceTime in MoML filters.
        serviceTime = new PortParameter(this, "serviceTime");
        serviceTime.setExpression("1.0");
        serviceTime.setTypeEquals(BaseType.DOUBLE);
        // Put the delay port at the bottom of the icon by default.
        StringAttribute cardinality = new StringAttribute(
                serviceTime.getPort(), "_cardinal");
        cardinality.setExpression("SOUTH");


        _queue = new FIFOQueue();


        size = new TypedIOPort(this, "size", false, true);
        size.setTypeEquals(BaseType.INT);
        // Put it at the bottom of the icon by default.
        cardinality = new StringAttribute(size, "_cardinal");
        cardinality.setExpression("SOUTH");


        capacity = new Parameter(this, "capacity");
        capacity.setTypeEquals(BaseType.INT);
        capacity.setExpression("0");
    }

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    }


    /** Create the controllerName attribute. */
    private void _createAttribute() {
        try {
            controllerName = new StringAttribute(this, "controllerName");
        } catch (NameDuplicationException ex) {
            throw new InternalErrorException(getName() + "Cannot create "
                    + "controllerName attribute.");
        } catch (IllegalActionException ex) {
            throw new InternalErrorException(getName() + "Cannot create "

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     */
    public EventButton(CompositeEntity container, String name)
            throws IllegalActionException, NameDuplicationException {
        super(container, name);


        text = new StringAttribute(this, "text");
        text.setExpression("Click!");


        output.setTypeEquals(BaseType.GENERAL);


        _self = this;

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        trigger = new TypedIOPort(this, "trigger", true, false);
        trigger.setMultiport(true);
        // Leave trigger type undeclared.
        // Put it at the bottom of the icon by default.
        StringAttribute cardinality = new StringAttribute(trigger, "_cardinal");
        cardinality.setExpression("SOUTH");


        size = new TypedIOPort(this, "size", false, true);
        size.setTypeEquals(BaseType.INT);
        // Put it at the bottom of the icon by default.
        cardinality = new StringAttribute(size, "_cardinal");
        cardinality.setExpression("SOUTH");


        _queue = new FIFOQueue();


        capacity = new Parameter(this, "capacity");
        capacity.setTypeEquals(BaseType.INT);

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