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+ Minimum Arrow Length.

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moritz haarmann 2014-04-28 11:52:11 +02:00
parent 2207f107e4
commit a2d850b5c3
1 changed files with 31 additions and 11 deletions
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42
Classes/BITArrowImageAnnotation.m
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@ -44,30 +44,50 @@
} }
- (void)buildShape { - (void)buildShape {
CGFloat topHeight = MAX(self.frame.size.width / 3.0f,10); CGFloat baseWidth = MAX(self.frame.size.width, self.frame.size.height);
CGFloat topHeight = MAX(baseWidth / 3.0f,10);
CGFloat lineWidth = MAX(self.frame.size.width / 10.0f,3); CGFloat lineWidth = MAX(baseWidth / 10.0f,3);
CGFloat startX, startY, endX, endY; CGFloat startX, startY, endX, endY;
CGRect boundRect = CGRectInset(self.bounds, 0, 0);
CGFloat arrowLength= sqrt(pow(CGRectGetWidth(boundRect), 2) + pow(CGRectGetHeight(boundRect), 2));
if (arrowLength < 30){
CGFloat factor = 30.f/arrowLength;
boundRect = CGRectApplyAffineTransform(boundRect, CGAffineTransformMakeScale(factor,factor));
}
if ( self.movedDelta.width < 0){ if ( self.movedDelta.width < 0){
startX = CGRectGetMinX(self.bounds); startX = CGRectGetMinX(boundRect);
endX = CGRectGetMaxX(self.bounds); endX = CGRectGetMaxX(boundRect);
} else { } else {
startX = CGRectGetMaxX(self.bounds); startX = CGRectGetMaxX(boundRect);
endX = CGRectGetMinX(self.bounds); endX = CGRectGetMinX(boundRect);
} }
if ( self.movedDelta.height < 0){ if ( self.movedDelta.height < 0){
startY = CGRectGetMinY(self.bounds); startY = CGRectGetMinY(boundRect);
endY = CGRectGetMaxY(self.bounds); endY = CGRectGetMaxY(boundRect);
} else { } else {
startY = CGRectGetMaxY(self.bounds); startY = CGRectGetMaxY(boundRect);
endY = CGRectGetMinY(self.bounds); endY = CGRectGetMinY(boundRect);
} }
if (abs(CGRectGetWidth(boundRect)) < 30 || abs(CGRectGetHeight(boundRect)) < 30){
CGFloat smallerOne = MIN(abs(CGRectGetHeight(boundRect)), abs(CGRectGetWidth(boundRect)));
UIBezierPath *path = [self bezierPathWithArrowFromPoint:CGPointMake(endX,endY) toPoint:CGPointMake(startX,startY) tailWidth:lineWidth headWidth:topHeight headLength:topHeight]; CGFloat factor = smallerOne/30.f;
CGRectApplyAffineTransform(boundRect, CGAffineTransformMakeScale(factor,factor));
}
UIBezierPath *path = [self bezierPathWithArrowFromPoint:CGPointMake(endX, endY) toPoint:CGPointMake(startX, startY) tailWidth:lineWidth headWidth:topHeight headLength:topHeight];
self.shapeLayer.path = path.CGPath; self.shapeLayer.path = path.CGPath;
self.strokeLayer.path = path.CGPath; self.strokeLayer.path = path.CGPath;