[vtkusers] vtkImageColorViewer

[David Gobbi]

You can verify what objects aren't deleted by compiling VTK with
VTK_DEBUG_LEAKS set in your CMakeCache.txt file.  There might be some
other objects that are connected to the viewer that cause VTK not to
delete it.

   David


On Mon, Nov 30, 2009 at 9:31 AM, Lic. José M. Rodriguez Bacallao
<jmrbcu at gmail.com> wrote:
> sorry, I forgot to put it in the example, but, I already do what U
> said and nothing happened
>
> r = vtkgdcm.vtkGDCMImageReader()
> r.SetFileName('/path/to/image.dcm')
> r.Update()
>
> v = vtkgdcm.vtkImageColorViewer()
> v.SetInputConnection(r.GetOutputPort())
> v.SetupInteractor(QT Interactor)
> v.SetRenderWindow(Qt Interactor.GetRenderWindow())
> v.Render()
>
> this is what I am doing in the close event of my widget in the tab:
>
> v.SetupInteractor(None)
> v.SetInputConnection(None)
> v = None
> del v
>
> r = None
> del r
>
>
> On 11/30/09, David Gobbi <david.gobbi at gmail.com> wrote:
>> Hi José,
>>
>> Please keep the discussion on the list.
>>
>> In the example code in your email, you aren't disconnecting the viewer
>> from the pipeline.  In my email, I specifically said you should remove
>> the input from the viewer.  Why didn't you do it?  Don't you like my
>> advice?
>>
>> I will repeat myself.  Before you delete the viewer, do this:
>>
>> v.SetInputConnection(None)
>>
>> Email me back and tell me if that works.
>>
>>     David
>>
>>
>> On Mon, Nov 30, 2009 at 9:02 AM, Lic. José M. Rodriguez Bacallao
>> <jmrbcu at gmail.com> wrote:
>>> this is how I setup my pipeline:
>>>
>>> r = vtkgdcm.vtkGDCMImageReader()
>>> r.SetFileName('/path/to/image.dcm')
>>> r.Update()
>>>
>>> v = vtkgdcm.vtkImageColorViewer()
>>> v.SetInputConnection(r.GetOutputPort())
>>> v.SetupInteractor(QT Interactor)
>>> v.SetRenderWindow(Qt Interactor.GetRenderWindow())
>>> v.Render()
>>>
>>> this is what I am doing in the close event of my widget in the tab:
>>>
>>> v.SetupInteractor(None)
>>> v = None
>>> del v
>>>
>>> r = None
>>> del r
>>>
>>> but it doesn't release its memory, just a few Mb, not all.
>>>
>>> On 11/28/09, David Gobbi <david.gobbi at gmail.com> wrote:
>>>> Hi José,
>>>>
>>>> Before calling "del" you should remove it from the pipeline.  This is
>>>> done with any one of these three calls:
>>>>
>>>> object.RemoveAllInputs(), if the object is a vtkAlgorithm
>>>>
>>>> object.SetInputConnection(None), if the object is faking a vtkAlgorithm
>>>>
>>>> object.SetInput(None), if the object still uses the old pipeline API
>>>>
>>>> After that, the "del" should release the memory immediately.  If it
>>>> doesn't, you can always force the garbage collection:
>>>>
>>>> # force python garbage collection
>>>> import gc
>>>> gc.collect()
>>>>
>>>> # force VTK garbage collection
>>>> import vtk
>>>> vtk.vtkGarbageCollector.Collect()
>>>>
>>>> Forcing the garbage collector usually isn't necessary if you have
>>>> disconnected the object from the pipeline.
>>>>
>>>> Cheers,
>>>>
>>>>     David
>>>>
>>>>
>>>>
>>>>
>>>> On Sat, Nov 28, 2009 at 3:50 PM, Lic. José M. Rodriguez Bacallao
>>>> <jmrbcu at gmail.com> wrote:
>>>>> hi folks, how do I release the memory occupied by an
>>>>> vtkImageColorViewer used  from python?
>>>>> I think it is not properly garbage collected, even when I try remove
>>>>> it with "del"