Applet Callbacks Structure

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Applet Callbacks Structure

When you instantiate an applet using the JMNewAppletViewer function JMNewAppletViewer, you must pass a data structure that supplies callback information for the applet. This data structure is defined by the JMAppletViewerCallbacks data type.



 
struct JMAppletViewerCallbacks {

    UInt32                  fVersion;       

    JMShowDocumentProcPtr   fShowDocument;  

    JMSetStatusMsgProcPtr   fSetStatusMsg;  

};

Field descriptions

fVersion: The version of JManager. You should set this field to kJMVersion .
fShowDocument: A pointer to a function that displays the contents of a URL passed to it, possibly in a new window. This callback function has the following type definition:



 
                    typedef void (*JMShowDocumentProcPtr) (

                        JMAppletViewerRef viewer, 

                        const JMTextRef urlString, 

                        const JMTextRef windowName);

For more information, see the description of the application-defined function MyShowDocument.
fSetStatusMsg: A pointer to a function that handles messages from the applet. The client application can display the message (in a status bar, for example) or ignore it. This callback function has the following type definition:



 
                    typedef void (*JMSetStatusMsgProcPtr) (

                        JMAppletViewerRef viewer, 

                        const JMTextRef statusMsg);

For more information, see the description of the application-defined function MySetStatusMsg.