Graphics Reference
In-Depth Information
LISTING 6-3
Continued
// Give the Gaussian blur filter a name
[blurFilter
setName
:
@”blur”
];
[blurLayer
setFilters
:[
NSArray arrayWithObject
:blurFilter]];
}
We have created a
CALayer
-derived class called
BlurLayer
that we add to the
BlurView
view object. The
BlurLayer
class simply manages the image content of the layer. The
image for each instance of the view is set in the
-applicationDidFinishLaunching
method, found in the application delegate class, as shown in Listing 6-4.
LISTING 6-4
Initialization of BlurView Objects
- (
void
)applicationDidFinishLaunching:(
NSNotification
*)aNotification;
{
NSString
*iconPath1 = [[
NSBundle mainBundle
]
pathForResource
:
@”desktop”
ofType
:
@”png”
];
NSString
*iconPath2 = [[
NSBundle mainBundle
]
pathForResource
:
@”fwdrive”
ofType
:
@”png”
];
NSString
*iconPath3 = [[
NSBundle mainBundle
]
pathForResource
:
@”pictures”
ofType
:
@”png”
];
NSString
*iconPath4 = [[
NSBundle mainBundle
]
pathForResource
:
@”computer”
ofType
:
@”png”
];
NSImage *image1 = [[NSImage
alloc
]
initWithContentsOfFile
:iconPath1];
NSImage *image2 = [[NSImage
alloc
]
initWithContentsOfFile
:iconPath2];
NSImage *image3 = [[NSImage
alloc
]
initWithContentsOfFile
:iconPath3];
NSImage *image4 = [[NSImage
alloc
]
initWithContentsOfFile
:iconPath4];
[blurView1 setLayerImage:image1];
[blurView2 setLayerImage:image2];
[blurView3 setLayerImage:image3];
[blurView4 setLayerImage:image4];
}
