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//
// IGKMatteSegmentedControl.m
// Ingredients
//
// Created by Alex Gordon on 27/02/2010.
// Written in 2010 by Fileability.
//

#import "IGKMatteSegmentedControl.h"
#import "NSShadow+MCAdditions.h"
#import "NSBezierPath+MCAdditions.h"

@interface IGKMatteSegmentedControl ()

- (float)igk_drawSegment:(NSUInteger)segment runningY:(float)runningY selected:(BOOL)isSelected;

@end


@implementation IGKMatteSegmentedControl

- (id)initWithFrame:(NSRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code here.
    }
    return self;
}

- (void)drawRect:(NSRect)rect
{
    rect = [self bounds];

//Setting isFlipped makes the menu appear in the wrong place. So we need to fake it
//NSAffineTransform doesn't play well with inner shadows, so we're using an image instead

NSImage *image = [[NSImage alloc] initWithSize:rect.size];
[image lockFocus];

NSUInteger selseg = [self selectedSegment];

int i;
float runningY = 0.0;
float sely = 0.0;
for (i = 0; i < [self segmentCount]; i++)
{
float width = [self widthForSegment:i];

//if (i != selseg)
[self igk_drawSegment:i runningY:runningY selected:NO];
//else
if (i == selseg)
sely = runningY;

runningY += width - 1.0;
}

if (selseg != -1)
[self igk_drawSegment:selseg runningY:sely selected:YES];

[image unlockFocus];

[image drawInRect:NSMakeRect(0, 0, rect.size.width, rect.size.height)
fromRect:NSZeroRect
operation:NSCompositeSourceOver
fraction:[self isActive] ? 1.0 : 0.7
respectFlipped:YES
hints:nil];
}
- (float)igk_drawSegment:(NSUInteger)segment runningY:(float)runningY selected:(BOOL)isSelected
{
BOOL isLeft = (segment == 0);
BOOL isRight = (segment + 1 == [self segmentCount]);

float width = [self widthForSegment:segment];

if (isLeft)
{
width += 1.0;
}

width += 1.0;

//Create a bezier path
const double radius = 4.0;

NSRect strokeRect = NSMakeRect(runningY, 1, width, [self bounds].size.height - 1.0);

if (!isSelected)
{
strokeRect.size.height -= 1.0;
NSBezierPath *bottomHighlightPath = [[self class] roundedBezierInRect:strokeRect radius:radius hasLeft:isLeft hasRight:isRight];
[[NSColor colorWithCalibratedWhite:1.0 alpha:0.25] set];
[bottomHighlightPath fill];

strokeRect.origin.y += 1.0;
NSBezierPath *strokePath = [[self class] roundedBezierInRect:strokeRect radius:radius hasLeft:isLeft hasRight:isRight];

NSRect fillRect = NSInsetRect(strokeRect, 1.0, 1.0);
NSBezierPath *fillHighlightPath = [[self class] roundedBezierInRect:fillRect radius:radius - 1 hasLeft:isLeft hasRight:isRight];
fillRect.size.height -= 1.0;
NSBezierPath *fillPath = [[self class] roundedBezierInRect:fillRect radius:radius - 1 hasLeft:isLeft hasRight:isRight];

NSGradient *strokeGradient = [[NSGradient alloc] initWithStartingColor:[NSColor colorWithCalibratedRed:0.484 green:0.484 blue:0.484 alpha:1.000] endingColor:[NSColor colorWithCalibratedRed:0.484 green:0.484 blue:0.484 alpha:1.000]];
[strokeGradient drawInBezierPath:strokePath angle:90];

[[NSColor colorWithCalibratedRed:0.907 green:0.907 blue:0.907 alpha:1.000] set];
[fillHighlightPath fill];

NSGradient *fillGradient = [[NSGradient alloc] initWithStartingColor:[NSColor colorWithCalibratedRed:0.728 green:0.728 blue:0.728 alpha:1.000] endingColor:[NSColor colorWithCalibratedRed:0.878 green:0.878 blue:0.878 alpha:1.000]];
[fillGradient drawInBezierPath:fillPath angle:90];
}
else
{
NSRect pressedRect = strokeRect;
pressedRect.size.width -= isLeft ? 2.0 : isRight ? 0.0 : 1.0;// segment - 2.0;
pressedRect.size.height -= 1.0;
pressedRect.origin.y += 1.0;

NSBezierPath *pressedPath = [[self class] roundedBezierInRect:pressedRect radius:radius hasLeft:isLeft hasRight:isRight];

NSShadow *insideShadow = [[NSShadow alloc] initWithColor:[NSColor colorWithCalibratedWhite:0.0 alpha:0.6] offset:NSMakeSize(0.0, -1.0) blurRadius:4.0];//;

[[NSColor colorWithCalibratedRed:0.728 green:0.728 blue:0.728 alpha:1.000] set];

[pressedPath fill];

[pressedPath fillWithInnerShadow:insideShadow];

NSGradient *pressedGradient = [[NSGradient alloc] initWithStartingColor:[NSColor colorWithCalibratedWhite:0.0 alpha:0.34]
endingColor:[NSColor colorWithCalibratedWhite:0.0 alpha:0.06 + 0.34]];

[pressedGradient drawInBezierPath:pressedPath angle:90];
}

if (isSelected || [self selectedSegment] != segment)
{
NSImage *image = [self imageForSegment:segment];

if (isSelected)
{
//*** MASSIVE HACK ***
image = [NSImage imageNamed:[[image name] stringByAppendingString:@"_S"]];
}

if (image)
{
[image drawAtPoint:NSMakePoint(floor(runningY + width / 2.0 - [image size].width / 2.0 - 1.0 + segment), ceil([self bounds].size.height / 2.0 - [image size].height / 2.0 + 1.0))
fromRect:NSZeroRect
operation:NSCompositeSourceOver
fraction:([self isEnabledForSegment:segment] ? 1.0 : 0.5)];
}
}

//Calculate the Y coord of the next segment
return runningY + width - 1.0;
}
+ (NSBezierPath *)roundedBezierInRect:(NSRect)rect radius:(float)radius hasLeft:(BOOL)hasLeft hasRight:(BOOL)hasRight
{
NSBezierPath *b = [NSBezierPath bezierPath];

NSPoint bottomLeft = rect.origin;
NSPoint topLeft = NSMakePoint(NSMinX(rect), NSMaxY(rect));
NSPoint topRight = NSMakePoint(NSMaxX(rect), NSMaxY(rect));
NSPoint bottomRight = NSMakePoint(NSMaxX(rect), NSMinY(rect));

if (hasLeft)
[b moveToPoint:NSMakePoint(NSMidX(rect), NSMaxY(rect))];
else
[b moveToPoint:topLeft];

if (hasLeft)
[b appendBezierPathWithArcFromPoint:topLeft toPoint:bottomLeft radius:radius];
else
[b lineToPoint:bottomLeft];

if (hasLeft)
[b appendBezierPathWithArcFromPoint:bottomLeft toPoint:bottomRight radius:radius];
else
[b appendBezierPathWithArcFromPoint:bottomLeft toPoint:bottomRight radius:radius];

if (hasRight)
[b appendBezierPathWithArcFromPoint:bottomRight toPoint:topRight radius:radius];
else
[b lineToPoint:bottomRight];

if (hasRight)
[b appendBezierPathWithArcFromPoint:topRight toPoint:topLeft radius:radius];
else
[b lineToPoint:topRight];

[b closePath];

return b;
}


#pragma mark Redrawing when the window becomes Active/Inactive

- (void)viewWillMoveToWindow:(NSWindow *)window
{
//NSLog(@"viewWillMoveToWindow: %d", [self isActive]);

if (window)
{
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowDidBecomeMain:) name:NSWindowDidBecomeKeyNotification object:window];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowDidResignMain:) name:NSWindowDidResignKeyNotification object:window];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowDidBecomeMain:) name:NSWindowDidBecomeMainNotification object:window];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowDidResignMain:) name:NSWindowDidResignMainNotification object:window];
}
else
{
[[NSNotificationCenter defaultCenter] removeObserver:self name:NSWindowDidBecomeKeyNotification object:[self window]];
[[NSNotificationCenter defaultCenter] removeObserver:self name:NSWindowDidResignKeyNotification object:[self window]];
[[NSNotificationCenter defaultCenter] removeObserver:self name:NSWindowDidBecomeMainNotification object:[self window]];
[[NSNotificationCenter defaultCenter] removeObserver:self name:NSWindowDidResignMainNotification object:[self window]];
}

[self setNeedsDisplay:YES];
}
- (void)viewDidMoveToWindow
{
[self setNeedsDisplay:YES];
}
- (void)windowDidBecomeMain:(NSNotification *)notif
{
[self setNeedsDisplay:YES];
}
- (void)windowDidResignMain:(NSNotification *)notif
{
[self setNeedsDisplay:YES];
}
- (BOOL)isActive
{
return [[self window] isMainWindow] || ([NSStringFromClass([[self window] class]) isEqual:@"_NSFullScreenWindow"] && [[self window] isKeyWindow]);
}

@end
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