/*

     File: SliceView.m

 Abstract: View to display the slice guidelines

  Version: 1.1

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 */

#import "SliceView.h"

@implementation SliceView

-(void)drawRect:(NSRect)rect {

    //Draw the image

    [img drawInRect:[self bounds] fromRect:NSZeroRect operation:NSCompositeCopy fraction:1];

    //Query the view's width/height

    NSRect vBounds = [self bounds];

    float vWidth = vBounds.size.width;

    float vHeight = vBounds.size.height;

    //Set the active color to red and create the lines

    [[NSColor redColor] set];

    NSBezierPath* path = [NSBezierPath bezierPath];

    //The two horizontal slice lines

    [path moveToPoint:NSMakePoint(0, southWest.y)];

    [path lineToPoint:NSMakePoint(vWidth, southWest.y)];

    [path moveToPoint:NSMakePoint(0, northEast.y)];

    [path lineToPoint:NSMakePoint(vWidth, northEast.y)];

    //The two vertical slice lines

    [path moveToPoint:NSMakePoint(southWest.x, 0)];

    [path lineToPoint:NSMakePoint(southWest.x, vHeight)];

    [path moveToPoint:NSMakePoint(northEast.x, 0)];

    [path lineToPoint:NSMakePoint(northEast.x, vHeight)];

    //Draw the lines

    [path stroke];

}

//Slice up the image using the center slice bounds

-(void)sliceWithRect:(CGRect)rect {

    //Get the bounds for this view

    NSRect vBounds = [self bounds];

    float vWidth = vBounds.size.width;

    float vHeight = vBounds.size.height;

    //Calculate the origin and dimmensions in view coordinates

    float x0 = rect.origin.x * vWidth;

    float y0 = rect.origin.y * vHeight;

    float width = rect.size.width * vWidth;

    float height = rect.size.height * vHeight;

    //Set the corners of the center slice to be used in 'drawRect:' 

    southWest = NSMakePoint(x0, y0);

    northEast = NSMakePoint(x0 + width, y0 + height);

    //Tell the system that this view needs to be re-drawn

    [self setNeedsDisplay:YES];

}

@synthesize img;

@end