Re: ParameterChanged / FxParameterSettingAPI

3 Apr 2006

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On Apr 3, 2006, at 12:09 PM, Dave Howell wrote:
Yes, that should work.
Dave
Howdy,

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Regards,
David Farmer

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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?
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?

On Thu, 30 Mar 2006 21:04:41 -0600, darf <darf@cidertank.com> wrote:

    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?
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