o2oa-ios/O2Platform/Framework/ZSSRichTextEditor/Third Party/HRBrightnessCursor.m

/*-
 * Copyright (c) 2011 Ryota Hayashi
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD$
 */

#import "HRBrightnessCursor.h"
#import "HRCgUtil.h"

@implementation HRBrightnessCursor

- (id)initWithPoint:(CGPoint)point
{
    CGSize size = CGSizeMake(18.0f, 40.0f);
    CGRect frame = CGRectMake(point.x - size.width/2.0f, point.y - size.height/2.0f, size.width, size.height);
    self = [super initWithFrame:frame];
    if (self) {
        [self setBackgroundColor:[UIColor clearColor]];
        [self setUserInteractionEnabled:FALSE];
    }
    return self;
}

- (void)drawRect:(CGRect)rect
{
    CGContextRef context = UIGraphicsGetCurrentContext();
    
    CGContextSaveGState(context);
    HRSetRoundedRectanglePath(context, CGRectMake(2.0f, 13.0f, 14.0f, 14.0f), 2.0f);
    [[UIColor colorWithWhite:0.98f alpha:1.0f] set];
    CGContextSetLineWidth(context, 2.0f);
    CGContextSetShadowWithColor(context, CGSizeMake(0.0f, 1.0f), 2.0f, [UIColor colorWithWhite:0.0f alpha:0.3f].CGColor);
    CGContextDrawPath(context, kCGPathFillStroke);
    
    CGContextRestoreGState(context);
    
    CGContextSaveGState(context);
    HRSetRoundedRectanglePath(context, CGRectMake(2.0f, 13.0f, 14.0f, 14.0f), 2.0f);
    CGContextClip(context);
    
    float top_color = 0.9f;
    float bottom_color = 0.98f;
    float alpha = 1.0f;
    CGFloat gradient_color[] = {
        top_color ,top_color ,top_color ,alpha,
        bottom_color ,bottom_color ,bottom_color ,alpha
    };
    CGGradientRef gradient;
    CGColorSpaceRef colorSpace;
    size_t num_locations = 2;
    CGFloat locations[2] = { 0.0, 1.0 };
    colorSpace = CGColorSpaceCreateDeviceRGB();
    gradient = CGGradientCreateWithColorComponents(colorSpace, gradient_color,
                                                   locations, num_locations);
    
    CGPoint startPoint = CGPointMake(self.frame.size.width/2, 0.0);
    CGPoint endPoint = CGPointMake(self.frame.size.width/2, self.frame.size.height);
    CGContextDrawLinearGradient(context, gradient, startPoint, endPoint, 0);
    
    // GradientとColorSpaceを開放する
    CGColorSpaceRelease(colorSpace);
    CGGradientRelease(gradient);
    
    CGContextRestoreGState(context);
    
    CGContextSaveGState(context);
    [[UIColor colorWithWhite:1.0f alpha:1.0f] setStroke];
    CGContextMoveToPoint(context, 6.0f, 17.0f);
    CGContextAddLineToPoint(context, 6.0f, 24.0f);
    CGContextMoveToPoint(context, 9.0f, 17.0f);
    CGContextAddLineToPoint(context, 9.0f, 24.0f);
    CGContextMoveToPoint(context, 12.0f, 17.0f);
    CGContextAddLineToPoint(context, 12.0f, 24.0f);
    CGContextDrawPath(context, kCGPathStroke);
    
    CGContextRestoreGState(context);
    
}


@end