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TiPaintView.m
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executable file
·126 lines (107 loc) · 2.86 KB
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/**
* Titanium Paint Module
*
* Appcelerator Titanium is Copyright (c) 2009-2010 by Appcelerator, Inc.
* and licensed under the Apache Public License (version 2)
*/
#import "TiPaintView.h"
#import "TiUtils.h"
@implementation TiPaintView
- (id)init
{
if (self = [super init])
{
strokeWidth = 5;
strokeColor = CGColorRetain([[TiUtils colorValue:@"#000"] _color].CGColor);
strokeOpacity = 1;
}
return self;
}
- (void)dealloc
{
RELEASE_TO_NIL(drawImage);
CGColorRelease(strokeColor);
[super dealloc];
}
- (void)frameSizeChanged:(CGRect)frame bounds:(CGRect)bounds
{
[super frameSizeChanged:frame bounds:bounds];
if (drawImage!=nil)
{
[drawImage setFrame:bounds];
}
}
- (UIImageView*)imageView
{
if (drawImage==nil)
{
drawImage = [[UIImageView alloc] initWithImage:nil];
drawImage.frame = [self bounds];
[self addSubview:drawImage];
}
return drawImage;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[super touchesBegan:touches withEvent:event];
UITouch *touch = [touches anyObject];
lastPoint = [touch locationInView:[self imageView]];
lastPoint.y -= 20;
}
- (void)drawAt:(CGPoint)currentPoint
{
UIView *view = [self imageView];
UIGraphicsBeginImageContext(view.frame.size);
[drawImage.image drawInRect:CGRectMake(0, 0, view.frame.size.width, view.frame.size.height)];
CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
CGContextSetLineWidth(UIGraphicsGetCurrentContext(), strokeWidth);
CGContextSetStrokeColorWithColor(UIGraphicsGetCurrentContext(), strokeColor);
CGContextSetAlpha(UIGraphicsGetCurrentContext(), strokeOpacity);
CGContextBeginPath(UIGraphicsGetCurrentContext());
CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), currentPoint.x, currentPoint.y);
CGContextStrokePath(UIGraphicsGetCurrentContext());
drawImage.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
lastPoint = currentPoint;
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
[super touchesMoved:touches withEvent:event];
UITouch *touch = [touches anyObject];
CGPoint currentPoint = [touch locationInView:[self imageView]];
currentPoint.y -= 20;
[self drawAt:currentPoint];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
[super touchesEnded:touches withEvent:event];
[self drawAt:lastPoint];
}
#pragma mark Public APIs
- (void)setStrokeWidth_:(id)width
{
strokeWidth = [TiUtils floatValue:width];
}
- (void)setStrokeColor_:(id)value
{
CGColorRelease(strokeColor);
TiColor *color = [TiUtils colorValue:value];
strokeColor = [color _color].CGColor;
CGColorRetain(strokeColor);
}
- (void)setStrokeOpacity_:(id)alpha
{
strokeOpacity = [TiUtils floatValue:alpha];
}
- (void)clear:(id)args
{
if (drawImage!=nil)
{
drawImage.image = nil;
}
}
- (void)undo:(id)args
{
}
@end