//

//  StringArtView.m

//  Polygons

//

//  Created by jcr on Thu May 02 2002.

//  Copyright (c) 2002  Apple Computer, Inc. All rights reserved.

//

#import "StringArtView.h"

#import "NSViewExtensions.h"

#import "NSBezierPath_Polygons.h"

#import "PolygonAppController.h"

// It's a pretty common practice in Obj-C coding to put methods that you don't want others to use in a private category.  It's perfectly kosher to declare the interface to such a category in a .m file.

@interface StringArtView (private) 

- (void) updatePath;

@end

@implementation StringArtView (private) 

- (void) updatePath  // This is where we make the path sync up with the user's choices.

  { 

  NSAffineTransform 

    *transform = [NSAffineTransform transform];

  [self centerOriginInBounds];  // This is defined in a category of NSView...

  [transform scaleBy:radius];

  [transform rotateByRadians:rotation];

  if (path)   // Be tidy, don't leak the old path.

    [path release];

  path = [transform transformBezierPath: meshed ? 

      [NSBezierPath meshedPolygonWithSides:numPoints] 

      : [NSBezierPath polygonWithSides:numPoints]]; 

  [path retain];     

  [self setNeedsDisplay:YES];

  [controller updateUI];  

  }

@end

@implementation StringArtView

- (id) initWithFrame: (NSRect) frameRect

  { 

  if (self = [super initWithFrame:frameRect])  // Do the right things to be an NSView.

    {

    backgroundColor = [NSColor whiteColor];  // Set up a reasonable starting state.

    foregroundColor = [NSColor blackColor];

    numPoints = 5;

    radius = 0.5;

    if (!path) // I test for path's existence, because it's not guaranteed that -initWithFrame will only be called once.

      path = [[NSBezierPath bezierPath] retain];

    [self updatePath];

    }

  return self;

  }

- (void) drawRect: (NSRect) rect

  { 

  [backgroundColor set];    // Clear the background

  [NSBezierPath fillRect:rect];

  [foregroundColor set];

  [path setLineWidth:lineWidth];    // draw the path.

  [path stroke];

  }

  // Actions.  

- (IBAction) takeSidesFrom: (id) sender  {[self setSides:[sender intValue]]; }

- (IBAction) takeRadiusFrom: (id) sender { [self setRadius:[sender floatValue]]; }

- (IBAction) takeRotationFrom: (id) sender { [self setRotation:[sender floatValue]]; }

- (IBAction) takeMeshedStateFrom: (id) sender { [self setMeshedState: [sender intValue]]; }

- (IBAction) takeLineWidthFrom: (id) sender { [self setLineWidth:[sender floatValue]];}

- (IBAction) takeBackgroundColorFrom: (id) sender { [self setBackgroundColor:[sender color]]; }

- (IBAction) takeForegroundColorFrom: (id) sender { [self setForegroundColor:[sender color]]; }

  // accessors

- (int) sides { return numPoints; }  

- (void) setSides: (int) sides  { numPoints = sides; [self updatePath]; }

- (float) radius { return radius; }

- (void) setRadius: (float) howBig { radius = howBig; [self updatePath]; }

- (float) rotation {return rotation; }

- (void) setRotation: (float) howFar { rotation = howFar; [self updatePath]; }

- (BOOL) isMeshed { return meshed;}

- (void) setMeshedState: (BOOL) flag { meshed = flag; [self updatePath]; }

- (float) lineWidth { return lineWidth; }

- (void) setLineWidth: (float) newWidth { lineWidth = newWidth; [self setNeedsDisplay:YES];}

- (void) setFrame: (NSRect) frameRect { [super setFrame:frameRect]; [self updatePath]; }

- (void) setBoundsSize: (NSSize) newSize { [super setBoundsSize:newSize]; [self updatePath]; }

- (NSColor *) foregroundColor { return foregroundColor; }

- (void) setForegroundColor: (NSColor *) aColor { foregroundColor = aColor; [self setNeedsDisplay:YES]; }

- (NSColor *) backgroundColor { return backgroundColor; }

- (void) setBackgroundColor: (NSColor *) aColor { backgroundColor = aColor; [self setNeedsDisplay:YES]; }

  // tidy up

- (void) dealloc

  { 

  [path release];  // This is the only thing I allocated, so I'll get rid of it here.

  [super dealloc];

  }

@end

// Note:   one rather sloppy thing I did, was that I don't retain the NSColor values in -takeForgroundColor, and -takeBackgroundColor.  I get away with this because the colorwells providing those colors don't release them, but if they did, the app would crash in -drawRect, when it tried to sent -set messages to NSColors that had been destroyed.

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