iOS: support creation of Ink annotations

1 files changed, 84 insertions, 0 deletions

diff --git a/platform/ios/Classes/MuInkView.m b/platform/ios/Classes/MuInkView.m
new file mode 100644
index 00000000..6ac4d1dc
--- /dev/null
+++ b/platform/ios/Classes/MuInkView.m
@@ -0,0 +1,84 @@
+//
+//  MuInkView.m
+//  MuPDF
+//
+//  Copyright (c) 2013 Artifex Software, Inc. All rights reserved.
+//
+
+#include "common.h"
+#import "MuInkView.h"
+
+@implementation MuInkView
+
+- (id) 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 objectAtIndex:0] CGPointValue];
+			CGContextBeginPath(cref);
+			CGContextMoveToPoint(cref, pt.x, pt.y);
+			CGPoint lpt = pt;
+
+			for (int i = 1; i < curve.count; i++)
+			{
+				pt = [[curve objectAtIndex: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