[Insight-users] AddObserver + JAVA

[Oliveira Marcelo]

Hi Users !!!

Im try to write the MultiResImageRegistration1.cxx in
JAVA, but i dont know how can work with AddObserver.

Please, is possible in the new itk version put more
itk-java examples ? ill apreciated !!!

tanx a lot for your help and time !!!
best regards

a piece of my code:

//*****  MAIN CODE  ************************

optimizer.AddObserver( new itkIterationEvent(), new
CommandIterationUpdate() );
         
registration.AddObserver(new itkIterationEvent(), new
RegistrationInterfaceCommand());
        
                 
registration.SetNumberOfLevels( 3 );        
          
try 
{ 
             
   registration.StartRegistration(); 
            
} 
 catch(Exception e)
{
   System.out.println("Error");
}

//***************************************************
//****   CommandIterationUpdate Class
//**************************************************

public class CommandIterationUpdate extends
itkJavaCommand{
 
          
public void Execute(final itkObject object, final
itkEventObject event)
{
               
        itkRegularStepGradientDescentOptimizer
optimizer;  
        optimizer=
(itkRegularStepGradientDescentOptimizer) object;
        
         itkIterationEvent it = new
itkIterationEvent(); 

          if( (event) ==  (it)  )
          {
              return;
          }
        
 System.out.print(optimizer.GetCurrentIteration());
            System.out.print(optimizer.GetValue());
           
System.out.print(optimizer.GetCurrentPosition());
         
    }
    
}

//***************************************************
//****   RegistrationInterfaceCommand Class
//**************************************************
public class RegistrationInterfaceCommand extends
itkJavaCommand{
  
private itkMultiResolutionImageRegistrationMethod
registration; 
       
public void Execute(itkObject object,final
itkEventObject event)
   {
           
       itkIterationEvent it = new itkIterationEvent();


          if( (event) ==  (it)  )
          {
              return;
          }
          
                
       itkRegularStepGradientDescentOptimizer
optimizer;       
       itkMultiResolutionImageRegistrationMethodF3F3
reg;
      
   
       reg = 
(itkMultiResolutionImageRegistrationMethodF3F3)
object;
     
      
       optimizer =
(itkRegularStepGradientDescentOptimizer)
reg.GetOptimizer();  
          
       if( reg.GetCurrentLevel() == 0 )
       {
            
              optimizer.SetMaximumStepLength( 16.00 );
 
              optimizer.SetMinimumStepLength( 2.5 );
       }
       else
       {
             optimizer.SetMinimumStepLength(
optimizer.GetCurrentStepLength() );
             optimizer.SetMinimumStepLength(
optimizer.GetMinimumStepLength()/10.00 );
          
           
       }
          
             
   }
    
}
           


	
	
		
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