[vtkusers] mouse interaction with vtkImagePlaneWidget

[Aaron Cois]

I looked through the code, but I don't understand how the picker can replace a callback function.  I need some specific things to happen each time a point in the plane is clicked, and I don't see any event functionality in the picker, just record functionality...am i wrong?
 
   -Aaron

Xianjin Yang <Yang at AGIUSA.COM> wrote:

You do not need any callback command. Instead, you should 

    planeWidgetX->SetInteractor(iren); 
    planeWidgetX->SetKeyPressActivationValue('x'); 
    planeWidgetX->SetPicker(picker);      // vtkCellPicker 

Check the complete C++ in this example: 
\VTK\Hybrid\Testing\Cxx\ImagePlaneWidget.cxx 


Yang 

-----Original Message----- 
From: Aaron Cois [mailto:aaron_vtk at yahoo.com] 
Sent: Tuesday, May 25, 2004 11:04 AM 
To: vtkusers at vtk.org 
Subject: [vtkusers] mouse interaction with vtkImagePlaneWidget 


I am attemmpting to get the coordinates of a mouse 
click on a vtkImagePlaneWidget.  I believe (please 
correct me if i am wrong, I am not that experienced 
with vtk) that the best way to do this is to write a 
callback handler (deriving from vtkCommand), which i 
did, and to then add it as an observer to the 
vtkImagePlaneWidget.  However, this seems to have no 
effect.  My code basically looks like: 

m_ImagePlane2D->AddObserver(vtkCommand::LeftButtonPressEvent,m_MouseCallbackHandler); 
m_ImagePlane2D->EnabledOn(); 
m_ImagePlane2D->InteractionOn(); 
m_ImagePlane2D->On(); 

  Can anyone give me some help? 

(Note: I have tested the callback function by adding 
an observer using it to the window interactor...it 
works fine, but naturally that only gives me mouse 
clicks outside of the image plane, not within) 

    -Aaron 
__________________________________________________ 
Do You Yahoo!? 
Tired of spam? Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 

		
---------------------------------
Do you Yahoo!?
Friends.  Fun. Try the all-new Yahoo! Messenger
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20040525/fb9dbc5c/attachment.htm>