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POHow to draw smooth path with NSBezierPath
 

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  1. POHow to draw smooth path with NSBezierPath
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    <p>I am draing path with NSBezierPath currently:</p> <pre><code>- (void)drawRect:(NSRect)dirtyRect { [[NSColor blueColor] set]; [path stroke]; } </code></pre> <p>But the line seems pretty ugly(not smooth)</p> <p>Then I googled for some solutions and I got this:</p> <pre><code>- (void)drawRect:(NSRect)dirtyRect { NSGraphicsContext *graphicsContext; BOOL oldShouldAntialias; graphicsContext = [NSGraphicsContext currentContext]; oldShouldAntialias = [graphicsContext shouldAntialias]; [graphicsContext setShouldAntialias:NO]; [[NSColor blueColor] set]; [path stroke]; [graphicsContext setShouldAntialias:oldShouldAntialias]; } </code></pre> <p>But for me, noting changed, I still got the ugly path.</p> <p>Any suggestion?</p> <p>Thanks for answer.</p> <p>Here's the details:</p> <ol> <li>Create a cocoa application (not document-based)</li> <li>Create a new class "StretchView"</li> </ol> <h3>StretchView.h</h3> <pre><code>#import &lt;Cocoa/Cocoa.h&gt; @interface StretchView : NSView { NSBezierPath *path; } -(void)myTimerAction:(NSTimer *) timer; @end </code></pre> <h3>StretchView.m</h3> <pre><code>#import "StretchView.h" @implementation StretchView - (id)initWithFrame:(NSRect)frame { self = [super initWithFrame:frame]; if (self) { path = [[NSBezierPath alloc] init]; NSPoint p = CGPointMake(0, 0); [path moveToPoint:p]; myTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(myTimerAction:) userInfo:nil repeats:YES]; } return self; } - (void)drawRect:(NSRect)dirtyRect { NSLog(@"drawRect"); [[NSColor blueColor] set]; [path stroke]; } -(void)myTimerAction:(NSTimer *) timer { NSPoint p = CGPointMake(a, b); //a, b is random int val [path lineToPoint:p]; [path moveToPoint:p]; [path closePath]; [self setNeedsDisplay:YES]; } -(void)dealloc { [path release]; [super dealloc]; } @end </code></pre> <p>3.Open the Interface builder and drag a "Scroll view" to the main window<br> 4.Choose the "Scroll view" and set the class "StretchView" (in class identity window)</p>
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    1. PTQuestion
    1. USPeter Hosey
    1. USsupersurabbit
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    1. PO
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      1. PTAnswer
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    1. COPlease attach a screenshot illustrating the problem.
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      1. POHow to draw smooth path with NSBezierPath
      1. USCostique
    2. COAlso, please let us know where this drawRect method is located (is it just a simple view, or something like an NSTableView?) and the code for setting up the path.
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      1. POHow to draw smooth path with NSBezierPath
      1. USsosborn
    3. COYou probably want to turn anti-aliasing *on*, not *off*...
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      1. POHow to draw smooth path with NSBezierPath
      1. USJonathan Grynspan
 

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