//
//  DKScroller.m
//  DarkKit
//
//  Created by Chad Weider on 4/14/08.
//  Copyright (c) 2008 Chad Weider
//  Some rights reserved: <http://www.opensource.org/licenses/zlib-license.php>
//  
//  This software is provided 'as-is', without any express or implied warranty.
//  In no event will the authors be held liable for any damages arising from the
//  use of this software.
//  
//  Permission is granted to anyone to use this software for any purpose,
//  including commercial applications, and to alter it and redistribute it
//  freely, subject to the following restrictions:
//  
//  1. The origin of this software must not be misrepresented; you must not   
//  claim that you wrote the original software. If you use this software in a
//  product, an acknowledgment in the product documentation would be appreciated
//  but is not required.
//  
//  2. Altered source versions must be plainly marked as such, and must not be
//  misrepresented as being the original software.
//  
//  3. This notice may not be removed or altered from any source distribution.
//

#import "DKScroller.h"

#import "NSBezierPath+PXRoundedRectangleAdditions.h"
#include "CTGradient.h"

@interface NSScroller (NSScrollerPrivate)
- (struct _NSRect)_drawingRectForPart:(unsigned int)fp8;
+ (int)_arrowsConfig; //1 top & bottom //3 bottom
+ (void)_setArrowsConfig:(int)fp8;
@end

@implementation DKScroller

+ (int)_arrowsConfig; //1 top & bottom //3 bottom
  {
  return 1;
  }
+ (void)_setArrowsConfig:(int)fp8
  {
  [super _setArrowsConfig:1];
  }


- (BOOL)isVertical
  {
  return NSWidth([self bounds]) < NSHeight([self bounds]);
  }

//- (NSRect)rectForPart:(NSScrollerPart)aPart
//  {
//  float arrowLength = 0;
//  float slotLength;
//  float knobLength;
//  
//  if([self usableParts] == NSNoScrollerParts || [self arrowsPosition] == NSScrollerArrowsNone)
//	arrowLength = 0;
//  else
//	{
//	switch([self controlSize])
//		{
//		case NSRegularControlSize:
//			arrowLength = 12;
//							break;
//		case NSSmallControlSize:
//			arrowLength = 8;
//							break;
//		case NSMiniControlSize:
//			arrowLength = 12;
//							break;
//		}
//	}
//  
//  
//  slotLength = ([self isVertical] ? NSHeight([self bounds]):NSWidth([self bounds]) ) - 2*arrowLength;
//  knobLength = slotLength*[self knobProportion];
//  knobPosition = floorf(([self floatValue]*(1-knobLength))*slotLength);
//  
//  if([self isVertical])
//	{
//	
//	}
//  else
//	{
//	
//	}
//  }


- (NSRect)drawingRectForPart:(NSScrollerPart)part
  {
//  float arrowLength;
//  float bevelLength;
//  
//  switch([self controlSize])
//	{
//	case NSRegularControlSize:
//		arrowLength = 12;
//		bevelLength = 8;
//						break;
//	case NSSmallControlSize:
//		arrowLength = 8;
//		bevelLength = 5;
//						break;
//	case NSMiniControlSize:
//		arrowLength = 12;
//		bevelLength = 8;
//						break;
//	}
//  
//  switch (part)
//	{
//	case NSScrollerKnob:
//		
//						break;
//	case NSScrollerDecrementPage:
//	case NSScrollerKnob:
//	case NSScrollerIncrementPage:
//	case NSScrollerDecrementLine:
//	case NSScrollerIncrementLine:
//	case NSScrollerKnobSlot:
//	
//	default:
//		return NSZeroRect;
//	}
  }

- (void)drawKnob
  {
  NSRect knobRect = NSInsetRect([self _drawingRectForPart:NSScrollerKnob], .5, .5);
  
  NSBezierPath *knobPath = [NSBezierPath bezierPathWithRoundedRect:knobRect cornerRadius:[self isVertical] ? NSWidth(knobRect)/2 : NSHeight(knobRect)/2];
  
  CTGradient *fillGradient;
  if([self isEnabled] && 0)
	fillGradient = [CTGradient gradientWithBeginningColor:[NSColor colorWithCalibratedWhite:.4 alpha:1.0]
                                              endingColor:[NSColor colorWithCalibratedWhite:.2 alpha:1.0]];
  else
	fillGradient = [CTGradient gradientWithBeginningColor:[NSColor colorWithCalibratedWhite:.3 alpha:1.0]
                                              endingColor:[NSColor colorWithCalibratedWhite:.0 alpha:1.0]];

  
	      
  //[fillGradient fillBezierPath:knobPath angle:NSWidth(knobRect) > NSHeight(knobRect) ? -90.0 : 180];
  
  [knobPath setLineWidth:1];
  [[NSColor colorWithCalibratedWhite:1 alpha:1] set];
  //[knobPath stroke];
  }


- (void)drawKnobSlotInRect:(NSRect)rect highlight:(BOOL)flag
 {
 CTGradient *fillGradient = [CTGradient gradientWithBeginningColor:[NSColor colorWithCalibratedWhite:.3 alpha:1.0]
													   endingColor:[NSColor colorWithCalibratedWhite:.0 alpha:1.0]];
 [fillGradient fillRect:rect angle:90];
 }


- (void)drawArrow:(NSScrollerArrow)arrow highlightPart:(NSScrollerPart)part
  {
  float arrowLength;
  float bevelLength;
  
  switch([self controlSize])
	{
	case NSRegularControlSize:
		arrowLength = 12;
		bevelLength = 8;
						break;
	case NSSmallControlSize:
		arrowLength = 8;
		bevelLength = 5;
						break;
	case NSMiniControlSize:
		arrowLength = 12;
		bevelLength = 8;
						break;
	}
  
  [[NSColor greenColor]set];
  //NSRectFill([self _drawingRectForPart:part]);
  [[NSColor orangeColor]set];
  NSRectFill([self _drawingRectForPart:part]);
  
  //draw Inc and Dec button frame
  NSRect frameRect = NSMakeRect(0,0,arrowLength+bevelLength, [self isVertical] ? NSWidth([self bounds]) : NSHeight([self bounds]));
  frameRect = NSInsetRect(frameRect, .5, .5);
  float radius = ceil(NSHeight(frameRect)/2)+1.5;
  
  NSBezierPath *framePath = [NSBezierPath bezierPath];
  /* Draw as if on right - we'll transform for the different cases */
  //steps: +, --, |, --, )
  [framePath moveToPoint: NSMakePoint(NSMinX(frameRect), NSMinY(frameRect))];
  [framePath lineToPoint: NSMakePoint(NSMaxX(frameRect), NSMinY(frameRect))];
  [framePath lineToPoint: NSMakePoint(NSMaxX(frameRect), NSMaxY(frameRect))];
  [framePath lineToPoint: NSMakePoint(NSMinX(frameRect), NSMaxY(frameRect))];
  [framePath appendBezierPathWithArcWithCenter:NSMakePoint(NSMinX(frameRect)-sqrt(radius*radius - (radius-1.5)*(radius-1.5)), NSMidY(frameRect))
										radius:radius
									startAngle:+asin(radius/(radius+1))*360/(2*3.14159)
									  endAngle:-asin(radius/(radius+1))*360/(2*3.14159) 
									 clockwise:YES];
  
  
  [self drawKnobSlotInRect:frameRect highlight:NO];
  
  [framePath setLineWidth:1];
  [[NSColor colorWithCalibratedWhite:1 alpha:1] set];
  [framePath stroke];
  }

//- (void)drawRect:(NSRect)rect
//  {
//  float arrowLength;
//  float bevelLength;
//  
//  NSLog(@"draw");
//  
//  switch([self controlSize])
//	{
//	case NSRegularControlSize:
//		arrowLength = 12;
//		bevelLength = 8;
//						break;
//	case NSSmallControlSize:
//		arrowLength = 8;
//		bevelLength = 5;
//						break;
//	case NSMiniControlSize:
//		arrowLength = 12;
//		bevelLength = 8;
//						break;
//	}
//  
//  
//  [self drawKnobSlotInRect:[self bounds]];
//  
//  NSRect bevelRectIn = [self bounds];
//  if([self isVertical])
//	bevelRectIn.size.height = bevelLength;
//  else
//	bevelRectIn.size.width = bevelLength;
//  
//  NSRect bevelRectDe = NSOffsetRect(bevelRectIn, [self isVertical] ? 0 : NSWidth([self bounds])-bevelLength, [self isVertical] ? NSHeight([self bounds])-bevelLength : 0);
//  
//  
//  if([self usableParts] == NSNoScrollerParts || [self arrowsPosition] == NSScrollerArrowsNone)
//	{
//	[self drawArrowBevel:NSScrollerIncrementArrow inRect:bevelRectIn];
//	[self drawArrowBevel:NSScrollerDecrementArrow inRect:bevelRectDe];
//	}
//  else if([self usableParts] >= NSOnlyScrollerArrows)
//	{
//	[self drawArrowBevel:NSScrollerIncrementArrow inRect:NSInsetRect(bevelRectDe, [self isVertical] ? 0 : +arrowLength, [self isVertical] ? +arrowLength : 0)];
//	[self drawArrowBevel:NSScrollerDecrementArrow inRect:NSInsetRect(bevelRectDe, [self isVertical] ? 0 : -arrowLength, [self isVertical] ? -arrowLength : 0)];
//	
//	[self drawArrow:NSScrollerIncrementArrow inRect:NSInsetRect(bevelRectDe, [self isVertical] ? 0 : +arrowLength, [self isVertical] ? +arrowLength : 0)];
//	[self drawArrow:NSScrollerDecrementArrow inRect:NSInsetRect(bevelRectDe, [self isVertical] ? 0 : -arrowLength, [self isVertical] ? -arrowLength : 0)];
//	}
//  
//  if([self usableParts] == NSAllScrollerParts)
//	{
//	NSRect knobRect = [self bounds];
//	
//	knobRect = NSInsetRect([self bounds], [self isVertical] ? 0 : bevelLength, [self isVertical] ? bevelLength : 0);
//	if([self arrowsPosition] != NSScrollerArrowsNone)
//		knobRect = NSInsetRect([self bounds], [self isVertical] ? 0 : arrowLength, [self isVertical] ? arrowLength : 0);
//	
//	
//	float length = [self isVertical] ? NSHeight(knobRect) : NSWidth(knobRect);
//	float position = floorf(([self floatValue]*(1-[self knobProportion]))*length);
//	
//	knobRect = NSOffsetRect(knobRect, [self isVertical] ? 0 : position, [self isVertical] ? position : 0);
//	if([self isVertical])
//		knobRect.size.height = floorf(length*[self knobProportion]);
//	else
//		knobRect.size.width = floorf(length*[self knobProportion]);
//	
//	[self drawKnobInRect:knobRect];
//	}
//  }

@end