Inside Macintosh: QuickTime Components /

Chapter 7 - Sequence Grabber Panel Components / Sequence Grabber Panel Components Reference

Functions

Managing Your Panel Component

Sequence grabber components load, configure, and unload your panel component. As part of this process, the sequence grabber installs your panel's dialog items into the settings dialog box and may open your component's resource file. Panel components provide a number of functions that allow the sequence grabber to manage its relationship with panel components. This section discusses those functions.

After opening a connection to your panel component, the sequence grabber identifies itself to your component by calling your SGPanelSetGrabber function. The sequence grabber then tries to determine whether your component can work with its associated channel component by calling your SGPanelCanRun function. The sequence grabber calls this function only if you have set the channelFlagHasDependency component flag to 1.

Once the sequence grabber has determined that your panel component can work with its channel component, the sequence grabber may open your component's resource file (unless you have set the channelFlagDontOpenResFile component flag to 1). Once it has opened the resource file, it passes the file's reference number to you by calling your SGPanelSetResFile function.

Next, the sequence grabber prepares to add your component's items to the
settings dialog box. The sequence grabber obtains your item list by calling
your SGPanelGetDITL function. Once it has installed the items, it calls your SGPanelInstall function, giving you an opportunity to set initial values.

Before the sequence grabber removes your items from the settings dialog box, it calls your SGPanelRemove function.

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Subtopics

SGPanelSetGrabber

SGPanelCanRun

SGPanelSetResFile

SGPanelGetDITL

SGPanelInstall

SGPanelRemove