The scripting system defines four generic messages that can operate on the specific properties of an object and two meta-messages that query an object about the messages it can handle. See "Scripting" in The Application Kit chapter for a full explanation.
This message requests the number of properties supported by the receiver. It contains no data, but the reply message should contain one field:
| Field | Type code | Description |
|---|---|---|
| "result" | B_INT32_TYPE | The number of properties supported. |
This message requests the names of all message suites that the receiver supports. It doesn't contain any data, but the message that's sent in reply has one field:
| Field | Type code | Description |
|---|---|---|
| "suites" | B_STRING_TYPE | An array of suite names. |
A suite is a named set of messages and specifiers. A BHandler supports the suite if it can respond to the messages and resolve the specifiers.
These messages—as their names state—target a particular property under the control of the target handler. They have the following data fields:
| Field | Type code | Description |
|---|---|---|
| "specifiers" | B_MESSAGE_TYPE | An array of one or more BMessages that specify the targeted property. See AddSpecifier() in the BMessage class of the Application Kit for details on the contents of a specifier. |
| "data" | variable | For B_SET_PROPERTY messages only, the data that should be set. The data type depends on the targeted property. |
A class can choose to respond to these messages, in any combination, for any set of self-declared properties.
| Messages Table of Contents | Messages Index |
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