Re: ParameterChanged / FxParameterSettingAPI
Re: ParameterChanged / FxParameterSettingAPI
- Subject: Re: ParameterChanged / FxParameterSettingAPI
- From: David Farmer <email@hidden>
- Date: Mon, 3 Apr 2006 12:26:14 -0500
It is in response to a standard parameters being changed. Trying to
retrieve the API within the parameterChanged function always yields
NULL. What is the appropriate function to retrieve the parameter
setting API? Can it be cached?
On Apr 3, 2006, at 12:09 PM, Dave Howell wrote:
Yes, that should work.
In what context is parameterChanged being called? That is, is this
in response to an event in a custom parameter or on-screen control,
or just a value change for one of the standard plug-in types?
Dave
On Thu, 30 Mar 2006 21:04:41 -0600, darf <email@hidden> wrote:
Howdy,
Within 'parameterChanged' I would like to change the enabled
state of
another parameter. The documentation states this is possible in a
filter (
which my plugin is ). I have not been successful at retrieving the
FxParameterSettingAPI. I have not actually been able to retrieve
any of the
parameter APIs successfully. Any ideas? Should this be possible?
Documentation:
Parameter Interaction
When a user changes a parameter control for an FxPlug plug-in, the
host
application calls the plug-in method -parameterChanged:. In
response, the
plug-in can change the state of other parameters. For example, if
the value
of a toggle button changes, the plug-in can hide or reveal other
parameter
controls, or change their values.
Note: In FxPlug 1.0, the -parameterChanged: method is included in
the
FxFilter protocol, but not in the FxGenerator protocol. Generator
plug-ins
that need to respond to parameter changes can use custom parameter
UI.
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© 2005 Apple Computer, Inc. All Rights Reserved. (Last updated:
2005-06-04)
Regards,
David Farmer
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