Carbon


PickerGetPromptProcPtr

Header: ColorPickerComponents.h Carbon status: Supported

Defines a pointer to a color picker-defined get prompt callback function. Your get prompt function returns the prompt string currently used by your color picker.

typedef ComponentResult(* PickerGetPromptProcPtr) (
    SInt32 storage, 
    Str255 prompt
);

You would declare your function like this if you were to name it MyPickerGetPromptCallback:

ComponentResult MyPickerGetPromptCallback (
    SInt32 storage, 
    Str255 prompt
);
Parameter descriptions
storage

A handle to your color picker’s global data.

prompt

Your color picker’s prompt string.

function result

Your function should return noErr if successful, or an appropriate result code otherwise.

DISCUSSION

If you create a color picker, it must respond to the kGetPrompt request code, by calling a color picker-defined subroutine (MyPickerGetPromptCallback, for example).

When you create a color picker, the Color Picker Manager uses the Component Manager to request services from your color picker. The code for your color picker should be contained in a resource. The Component Manager expects that the entry point into this resource is a color picker-defined dispatch function. For information on how to create this dispatch function, see the Component Manager callback, ComponentRoutineProcPtr.


© 2000 Apple Computer, Inc. (Last Updated 6/30/2000)