| Author |  Topic  |  | 
              
                | supersk
    
 
                105 Posts | 
                    
                      |  Posted - Oct 16 2013 :  18:05:25     
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                      | I want to measure length between two point when image zoom is 800, when I set MouseInteractVt = miDragLen, I got the first length value; when I set MouseInteractVt = miPutRuler, I got the second length value. The first value does not equals the second value.Even more strangely, when MouseInteractVt = miPutRuler, I release the mouse the value will auto change. Why? Moreover, when MouseInteractVt = miDragLen, how can I keep the measurement result on image. Thank you! |  | 
              
                | supersk
    
 
                105 Posts | 
                    
                      |  Posted - Oct 27 2013 :  00:20:19     
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                      | somebody can give me some helpful advice?? |  
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                | fab
     
 
                1310 Posts | 
                    
                      |  Posted - Oct 30 2013 :  02:03:34     
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                      | Ruler object can have a different measure unit than DragLen (that is not an object, but just a measuring tool). Have you set ObjRulerUnit equals to TImageEnVect.MUnit? 
 ImageEnVect1.ObjRulerUnit[-1] := ieuINCHES;
 ImageEnVect1.MUnit := ieuINCHES;
 
 Also, at large zooms little differences can be normal due the math rounding.
 
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                | supersk
    
 
                105 Posts | 
                    
                      |  Posted - Nov 05 2013 :  23:49:45     
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                      | I think this is not real reason because when MouseInteractVt = miDragLen, the measure value will not change  when releasing the mouse at large zoom(greater than 100). |  
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                | fab
     
 
                1310 Posts | 
                    
                      |  Posted - Nov 27 2013 :  07:39:02     
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                      | Unfortunately I cannot replicate. Could you send a screenshot or a project with image which replicate this problem? |  
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