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#include "common.h"
#import "MuInkView.h"
@implementation MuInkView
{
CGSize pageSize;
NSMutableArray *curves;
UIColor *color;
}
- (instancetype) initWithPageSize:(CGSize)_pageSize
{
self = [super initWithFrame:CGRectMake(0, 0, 100, 100)];
if (self) {
[self setOpaque:NO];
pageSize = _pageSize;
color = [[UIColor colorWithRed:1.0 green:0.0 blue:0.0 alpha:1.0] retain];
curves = [[NSMutableArray array] retain];
UIPanGestureRecognizer *rec = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(onDrag:)];
[self addGestureRecognizer:rec];
[rec release];
}
return self;
}
@synthesize curves;
-(void)dealloc
{
[curves release];
[color release];
[super dealloc];
}
-(void) onDrag:(UIPanGestureRecognizer *)rec
{
CGSize scale = fitPageToScreen(pageSize, self.bounds.size);
CGPoint p = [rec locationInView:self];
p.x /= scale.width;
p.y /= scale.height;
if (rec.state == UIGestureRecognizerStateBegan)
[curves addObject:[NSMutableArray array]];
NSMutableArray *curve = curves.lastObject;
[curve addObject:[NSValue valueWithCGPoint:p]];
[self setNeedsDisplay];
}
- (void)drawRect:(CGRect)rect
{
CGSize scale = fitPageToScreen(pageSize, self.bounds.size);
CGContextRef cref = UIGraphicsGetCurrentContext();
CGContextScaleCTM(cref, scale.width, scale.height);
[color set];
CGContextSetLineWidth(cref, 5.0);
for (NSArray *curve in curves)
{
if (curve.count >= 2)
{
CGPoint pt = [curve[0] CGPointValue];
CGContextBeginPath(cref);
CGContextMoveToPoint(cref, pt.x, pt.y);
CGPoint lpt = pt;
for (int i = 1; i < curve.count; i++)
{
pt = [curve[i] CGPointValue];
CGContextAddQuadCurveToPoint(cref, lpt.x, lpt.y, (pt.x + lpt.x)/2, (pt.y + lpt.y)/2);
lpt = pt;
}
CGContextAddLineToPoint(cref, pt.x, pt.y);
CGContextStrokePath(cref);
}
}
}
@end
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