//

// WDEyedropper.m

// Inkpad

//

// This Source Code Form is subject to the terms of the Mozilla Public

// License, v. 2.0. If a copy of the MPL was not distributed with this

// file, You can obtain one at http://mozilla.org/MPL/2.0/.

//

// Copyright (c) 2008-2013 Steve Sprang

//

#import "WDEyedropper.h"

#import "WDColor.h"

#import "WDUtilities.h"

@implementation WDEyedropper

@synthesize fill = fill_;

- (id)initWithFrame:(CGRect)frame {

self = [super initWithFrame:frame];

if (!self) {

return nil;

}

self.opaque = NO;

return self;

}

- (void) setFill:(id)fill

{

if ([fill isEqual:fill_] || (!fill && !fill_)) {

return;

}

fill_ = fill;

[self setNeedsDisplay];

}

- (void) setBorderWidth:(float)width

{

borderWidth_ = width;

CGRect bounds = [self bounds];

CGRect outerBounds = CGRectInset(bounds, 10, 10);

CGRect innerBounds = CGRectInset(outerBounds, borderWidth_, borderWidth_);

CGPoint center = WDCenterOfRect(bounds);

// create a shadow path in the shape of the eyedropper

CGMutablePathRef path = CGPathCreateMutable();

// flip one of the ellipses so that we get a hole in the shadow

CGAffineTransform tX = CGAffineTransformMakeTranslation(center.x, center.y);

tX = CGAffineTransformScale(tX, 1, -1);

const CGAffineTransform flip = CGAffineTransformTranslate(tX, -center.x, -center.y);

CGPathAddEllipseInRect(path, &flip , outerBounds);

CGPathAddEllipseInRect(path, NULL, innerBounds);

self.layer.shadowOffset = CGSizeMake(0, 3);

self.layer.shadowRadius = 5;

self.layer.shadowOpacity = 0.4f;

self.layer.shadowPath = path;

CGPathRelease(path);

[self setNeedsDisplay];

}

- (void) drawRect:(CGRect)rect

{

CGContextRef ctx = UIGraphicsGetCurrentContext();

CGRect bounds = [self bounds];

CGRect outerBounds = CGRectInset(bounds, 10, 10);

CGRect outerBounds2 = CGRectInset(outerBounds, 2.5, 2.5);

CGRect innerBounds = CGRectInset(outerBounds, borderWidth_, borderWidth_);

// primary color fill

CGContextAddEllipseInRect(ctx, outerBounds);

CGContextAddEllipseInRect(ctx, innerBounds);

CGContextSaveGState(ctx);

CGContextEOClip(ctx);

fill_ ? [fill_ drawEyedropperSwatchInRect:outerBounds] : [[WDColor whiteColor] drawEyedropperSwatchInRect:outerBounds];

CGContextRestoreGState(ctx);

// outside edge

CGContextAddEllipseInRect(ctx, outerBounds);

CGContextAddEllipseInRect(ctx, outerBounds2);

CGContextSetGrayFillColor(ctx, 0.85, 1.0);

CGContextEOFillPath(ctx);

// more outside edge

CGContextSetLineWidth(ctx, 1.0f);

CGContextSetGrayStrokeColor(ctx, 0.6, 1.0);

CGContextStrokeEllipseInRect(ctx, outerBounds);

CGContextStrokeEllipseInRect(ctx, outerBounds2);

// inside edge

CGContextStrokeEllipseInRect(ctx, innerBounds);

// draw cross hairs in the center

CGContextSetGrayStrokeColor(ctx, 0.4, 1.0);

CGPoint center = WDAddPoints(WDRoundPoint(WDCenterOfRect(bounds)), CGPointMake(0.5, 0.5));

CGPoint points[8];

points[0] = WDSubtractPoints(center, CGPointMake(10, 0));

points[1] = WDSubtractPoints(center, CGPointMake(2, 0));

points[2] = WDAddPoints(center, CGPointMake(10, 0));

points[3] = WDAddPoints(center, CGPointMake(2, 0));

points[4] = WDSubtractPoints(center, CGPointMake(0, 10));

points[5] = WDSubtractPoints(center, CGPointMake(0, 2));

points[6] = WDAddPoints(center, CGPointMake(0, 10));

points[7] = WDAddPoints(center, CGPointMake(0, 2));

CGContextStrokeLineSegments(ctx, points, 8);

}

// touches fall through

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event {

return NO;

}

@end