Hi All,
I recently posted a message with subject "View with Subviews +
Drawing on top of everything" and I got convinced to use CALayers in
my view instead of NSView's.
summary: I added few CALayers to myView and tried to resize myView and
result was rusty and snaggy.
When I used NSView's (initially) even adding 120-150 NSView's was
faster and responsive.
I assumed using CALayer (instead of NSView's) makes my app faster
and more responsive with appealing looks and animations but my code
seems made the opposite of fast (http://theocacao.com/document.page/
595 )
There could be some possible flaw or I misunderstood the concept.
but the code is simple as of now ( I have to do lot of animation and
image additions in future ) still myView is slow ,
Shark app shows (If, of any use )
8.0% 8.0% CoreGraphics sseCGSFill8by1
3.0% 3.0% CoreGraphics sse64CGSFill8by1
2.6% 2.6% ATIRadeonX1000GLDriver gldInitDispatch
2.4% 2.4% mach_kernel ml_set_interrupts_enabled
1.9% 1.9% ATIRadeonX1000GLDriver gldUpdateDispatch
Quartz Debug.app shows a too much delay in updating the myView.
Any help is appreciated.
Thanks
Rajesh
Code:
@implementation MyView
-(void)awakeFromNib
{
pages = [[NSMutableArray alloc] init];
rootLayer = [[CALayer layer] retain];
rootLayer.name = @"root";
rootLayer.backgroundColor = CGColorCreateGenericRGB(1.0,1.0,1.0,1.0);
[self setLayer:rootLayer];
[self setWantsLayer:YES];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(handleFrameChange:)
name:NSViewFrameDidChangeNotification object:self];
}
- (id)initWithFrame:(NSRect)frame {
self = [super initWithFrame:frame];
if (self) {
}
return self;
}
- (void)handleFrameChange:(NSNotification *)aNotification
{
[self layout];
}
-(IBAction)addPage:(id)sender
{
CALayer *page = [PageLayer create];
[pages addObject:page];
page.name = [NSString stringWithFormat:@"%d",[pages count]+1];
[self layout];
}
- (BOOL)isFlipped
{
return YES;
}
- (void) mouseDown: (NSEvent*)ev
{
NSPoint pt = [ev locationInWindow];
CALayer *layer = [rootLayer hitTest:NSPointToCGPoint(pt)];
}
-(void)layout
{
NSEnumerator *pageEnumr = [pages objectEnumerator];
id pg;
float widthMargin = [self frame].size.width;
NSRect rect;
while(pg = [pageEnumr nextObject])
{
rect = [pg bounds];
rect.origin.x = x;
rect.origin.y = y;
[pg setFrame:rect];
x += rect.size.width + spacing;
if ( x >= widthMargin )
{
x = xOffset;
y += rect.size.height + spacing ;
}
[rootLayer addSublayer:pg];
}
}
@end
@implementation PageLayer
+(CALayer *)create
{
CALayer* myLayer = [CALayer layer];
myLayer.bounds = CGRectMake(0, 0, 150, 200);
myLayer.borderWidth = 1.0f ;
myLayer.borderColor = CGColorCreateGenericRGB(0.0,0.0,0.0,0.9);
myLayer.backgroundColor = CGColorCreateGenericGray(0.7, 1.0);
myLayer.name = @"page";
return myLayer;
}
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