/*

File: AnimationView.m

Abstract: Implementation file for our AnimationView class. This is 

            an NSView subView for our overlay window. We use it to 

            perform some simple animations.

Version: 1.1

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*/

#import "AnimationView.h"

@implementation AnimationView

//////////

//

// initWithFrame

//

// Initialize our NSView with frameRect

//

//////////

- (id)initWithFrame:(NSRect)frameRect

{

    id view = [super initWithFrame:frameRect];

    theta = 0.0;

    return view;

}

//////////

//

// initWithCoder

//

// Initializes a newly allocated NSView instance from data in aDecoder.

//

//////////

- (id)initWithCoder:(NSCoder *)aDecoder

{

    id view = [super initWithCoder:aDecoder];

    theta = 0;

    return view;

}

//////////

//

// doStarAnimation

//

// Perform simple animation using NSBezierPath

//

//////////

#define FPS 30.0    // Frames Per Second

#define PI  3.14159

- (void) doStarAnimation

{

    float x,y,t2;

    NSBezierPath *oval;

    theta += (2.0 * PI / FPS) / 2.0;    // spin every 2 seconds

    x = [self frame].size.width * .60;

    y = [self frame].size.height * .60;

    oval = [NSBezierPath bezierPath];

    [oval moveToPoint:

                NSMakePoint(x + cos(theta)*50, y + sin(theta) * 50)];

    for (t2=0; t2<=2*M_PI+.1; t2+=M_PI*.5) 

    {

        [oval curveToPoint:NSMakePoint(x + cos(theta+t2)*50,

                                        y + sin(theta+t2)*50)

                controlPoint1:NSMakePoint(x,y)

                controlPoint2:NSMakePoint(x,y)];

    }

    [ [NSColor blackColor] set];

    [oval stroke];

}

//////////

//

// drawRect

//

// Perform simple animation

//

//////////

- (void)drawRect:(NSRect)rect

{

    [[NSColor whiteColor] set];

    NSRectFill(rect);

    [self doStarAnimation];

}

@end