Hi

I have a view (holderview) which I add to it a uiimageview  as following

holderView=[[UIView  alloc] init];
    //[holderView setFrame:[self.view frame]];

    holderView.frame=CGRectMake(0,0,self.view.frame.size.width,self.view.frame.size.height  );

    if(imageview.image!=nil)
    {
        imageview.image=nil;
        [imageview.image release];
    }

    imageview = [[UIImageView alloc] init];
    imageview.frame=CGRectMake(0,0,holderView.frame.size.width,holderView.frame.size.height  );

    [imageview setImage:cppobject->OutputImage];
    imageview.contentMode = UIViewContentModeScaleAspectFit;

    [holderView addSubview:imageview];
    holderView.contentMode = UIViewContentModeScaleAspectFit ;

    UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(scale:)];
    [pinchRecognizer setDelegate:self];
    [holderView addGestureRecognizer:pinchRecognizer];
    [pinchRecognizer release];

    UIRotationGestureRecognizer *rotationRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotate:)];
    [rotationRecognizer setDelegate:self];
    [holderView addGestureRecognizer:rotationRecognizer];
    [rotationRecognizer release];

    panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)];
    [panRecognizer setMinimumNumberOfTouches:1];
    [panRecognizer setMaximumNumberOfTouches:1];
    [panRecognizer setDelegate:self];
    [holderView addGestureRecognizer:panRecognizer];


/* the function for gesture */






then I add another uiview to draw a line on it
DrawLine = [[MeasuringLayer alloc] init];

        DrawLine.frame = CGRectMake(0,0,self.view.frame.size.width,self.view.frame.size.height  );

    DrawLine.opaque = NO;
    DrawLine.backgroundColor = [UIColor clearColor];

    DrawLine.tag = 202 ;


    pinchRecognizerMeasure = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(MeasureAndDraw:)];
    [pinchRecognizerMeasure setDelegate:self];
    [DrawLine addGestureRecognizer:pinchRecognizerMeasure];
    [pinchRecognizerMeasure release];


    /*For keeping window Width and Level*/

    panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)];
    [panRecognizer setMinimumNumberOfTouches:1];
    [panRecognizer setMaximumNumberOfTouches:1];
    [panRecognizer setDelegate:self];
    [DrawLine addGestureRecognizer:panRecognizer];

    [self.view addSubview: DrawLine];



my problem is that I want to draw a line and get it its actual size I work with DICOM

I use the following code to get the distance , it work well with 90, 180, 270,0 angle rotation but it fail with other angels


- (void) DisplayDistance {


    for (UIView *subview in [DrawLine subviews])
    {
        if (subview.tag==203)
        {
            [subview removeFromSuperview];
        }


    }

    CGFloat Width ,  Height , ScaleFactor ,radians ;

    for (UIView *subview in [self.view subviews])
    {
        if (subview.tag==101)
        {


            if ([subview isEqual:holderView]) {
                NSLog(@"holder view is pointing correctly");
            }else {
                NSLog(@"holder view is not pointing correctly");
            }


            Width = subview.frame.size.width ;
            Height = subview.frame.size.height ;
            Origin = subview.frame.origin ;

            ScaleFactor = subview.contentScaleFactor ;


             radians = atan2f(subview.transform.b, subview.transform.a);

            NSLog(@"  Angel ---------->%f",(radians *180 / M_PI)) ;





        }


    }

    /*Zooming Area */

    CGFloat ZoomX =Width / (float ) cppobject->Width  ;

    NSLog(@"ZoomX  %f",ZoomX);

    NSLog(@"Width form %f ", Width);
    NSLog(@"Width width %f", (float )  cppobject->Width  );

    CGFloat ZoomY = Height / (float )  cppobject->Height  ;

    NSLog(@"Width form %f", Height );
    NSLog(@"Width width %f", (float ) cppobject->Height  );


    NSLog(@"ZoomY  %f",ZoomY);

    CGFloat minimmum ;

    if (ZoomX > ZoomY ) {
        minimmum = ZoomY;
    }
    else {

    minimmum = ZoomX;

    }

    /**/


    CGPoint outTL = [self RotatePoint:CGPointMake(0, 0) WithAngle:radians];
    CGPoint outTR = [self RotatePoint:CGPointMake((CGFloat) Width  , 0) WithAngle:radians];
    CGPoint outBL = [self RotatePoint:CGPointMake(0,(CGFloat) Height  ) WithAngle:radians];
    CGPoint outBR = [self RotatePoint:CGPointMake((CGFloat) Width  ,(CGFloat) Height  ) WithAngle:radians];

    NSLog(@" Width %f",(CGFloat) cppobject->Width ) ;
    NSLog(@" HEight %f",(CGFloat) cppobject->Height ) ;


    CGFloat temp1 = MIN(outTL.x ,outTR.x) ;

    CGFloat temp2 =MIN( outBL.x,outBR.x );
    CGFloat xtrans = MIN(temp1,temp2) ;

    temp1 =MIN( outTL.y,outTR.y );
    temp2 =MIN( outBL.y,outBR.y );
    CGFloat ytrans = MIN(temp1,temp2) ;





    NSLog(@"minimmum  %f",minimmum);



    CGPoint BitmapStart , BitmapEnd ;


    ////////////// Zooming

    BitmapStart = CGPointMake(  ( ( ( DrawLine.startPoint.x * ScaleFactor ) - Origin.x ) / minimmum )  , ( ( ( DrawLine.startPoint.y * ScaleFactor ) - Origin.y ) / minimmum ) ) ;

    ///////////////// Rotation
    BitmapStart = [self RotatePoint:BitmapStart WithAngle:radians];

    /////////////// Translation

    BitmapStart.x = BitmapStart.x - xtrans ;
    BitmapStart.y =BitmapStart.y - ytrans ;

    /*CGAffineTransform tr_BitmapStart = CGAffineTransformMakeRotation(radians);

    BitmapStart= CGPointApplyAffineTransform(BitmapStart, tr_BitmapStart );*/


    BitmapEnd = CGPointMake(  ( ( ( DrawLine.endPoint.x * ScaleFactor ) - Origin.x ) / minimmum )  , ( ( ( DrawLine.endPoint.y * ScaleFactor) - Origin.y ) / minimmum ) ) ;


    NSLog(@"BitmapEnd Before %f , %f", BitmapEnd.x ,BitmapEnd.y );


    BitmapEnd  = [self RotatePoint:BitmapEnd WithAngle:radians];


        NSLog(@"BitmapEnd Before %f , %f", BitmapEnd.x ,BitmapEnd.y );

    /////////////// Translation

    BitmapEnd.x = BitmapEnd.x - xtrans ;
    BitmapEnd.y =BitmapEnd.y - ytrans ;

        NSLog(@"BitmapEnd Before %f , %f", BitmapEnd.x ,BitmapEnd.y );


    //CGAffineTransform tr_BitmapEnd = CGAffineTransformMakeRotation(radians); BitmapEnd= CGPointApplyAffineTransform(BitmapEnd, tr_BitmapEnd );


    NSLog(@"BitmapEnd After Rotation %f", BitmapEnd );


    UILabel *Distance = [[UILabel alloc] initWithFrame:CGRectMake(DrawLine.endPoint.x, DrawLine.endPoint.y ,100, 20)];



    Distance.layer.cornerRadius=10;

    Distance.tag = 203 ;

    Distance.backgroundColor  =[UIColor greenColor];
    Distance.textColor =[UIColor blackColor];

    //holderView.bounds.size.width ;
    //holderView.bounds.size.height  ;


    CGFloat part1 =pow( ( ( ( BitmapEnd.x  /** holderView.contentScaleFactor */ ) - ( BitmapStart.x  /** holderView.contentScaleFactor*/  )  ) * cppobject->PixelSpacing.x ) , 2 ) ;

    NSLog(@"part1  %f",part1);

    CGFloat part2 =pow( ( ( ( BitmapEnd.y  /** holderView.contentScaleFactor */ ) - ( BitmapStart.y  /** holderView.contentScaleFactor*/  )  ) * cppobject->PixelSpacing.y ) , 2 ) ;

    NSLog(@"part2  %f",part2);


    CGFloat Result = sqrt( (part1 + part2) ) /10;

    NSLog(@"Result  %f",Result);


    Distance.text= [NSString stringWithFormat: @"%.2f Cm", Result ];

    [DrawLine addSubview: Distance] ;

    /*CGPoint StartPointConversion = [DrawLine convertPoint:DrawLine.startPoint toView:imageview.superview ];
    CGPoint EndPointConversion = [DrawLine convertPoint:DrawLine.endPoint toView:imageview.superview ];

    NSLog(@" Begin X %f , Begin Y %f" ,StartPointConversion.x , StartPointConversion.y ) ;
    NSLog(@" End X %f , End Y %f" ,EndPointConversion.x , EndPointConversion.y ) ;
    */
}