/*

     File: SampleEffectCocoaViewFactory.m

 Abstract: SampleEffectCocoaViewFactory.h

  Version: 1.1

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 */

/*    

    Factory class that implements to AUCocoaUIBase protocol.

    Pay particular attention to the behavior of the - (NSView *)uiViewForAudioUnit:withSize: function.

*/

#import "SampleEffectCocoaViewFactory.h"

#import "SampleEffectCocoaView.h"

@implementation SampleEffectCocoaViewFactory

// version 0

- (unsigned) interfaceVersion {

    return 0;

}

// string description of the Cocoa UI

- (NSString *) description {

    // don't return a hard coded string (e.g.: @"Sample Effect Cocoa UI") because that string may be destroyed (NOT released)

    // when this factory class is released.

    return [NSString stringWithString:@"Sample Effect Cocoa View"];

}

// N.B.: this class is simply a view-factory,

// returning a new autoreleased view each time it's called.

- (NSView *)uiViewForAudioUnit:(AudioUnit)inAU withSize:(NSSize)inPreferredSize {

    if (! [NSBundle loadNibNamed: @"SampleEffectUI" owner:self]) {

        return nil;

    }

    // if a valid view is not returned for whatever reason, just return nil from this function

    // if this is occurring -- check to see your nib's outlet is correcly connected

    if (uiViewInstance == nil)

        return nil;

    // This particular nib has a fixed size, so we don't do anything with the inPreferredSize argument.

    // It's up to the host application to handle.

    [uiViewInstance setAU:inAU];

    NSView *returnView = uiViewInstance;

    uiViewInstance = nil;       // zero out pointer.  This is a view factory.  Once a view's been created

                                // and handed off, the factory keeps no record of it.

    return [returnView autorelease];

}

@end