[vtkusers] vtkCanvas and "Visualization Toolkit" window

[Marco Sambin]

Hi Seb,

thanks for your reply.
The short answer is: yes, I am building and adding my vtkCanvas to my
application GUI in the EDT.

Let me explain a bit more how my application is working: this is a
Swing-based Java application, managing medical images. When I press a
button on the GUI of this application, the VTK-based reslicing feature
(based on vtkImagePlaneWidget's functionality) is invoked.

In particular, the three vtkImagePlaneWidgets are initialized, are
connected with a Reader loading the volume (which was initialized in a
separate thread), and they are placed in the vtkCanvas. This vtkCanvas is
then added to a JPanel inside my application's GUI.

Debugging my application, I have noticed that the separate "Visualization
Toolkit" window appears upon calling the Render() method on my vtkCanvas in
a moment when the vtkCanvas hasn't been added to the parent JPanel yet.

Shall I absolutely avoid calling Render() on a vtkCanvas which is not
visible yet?

Thanks and best regards,

Marco


On Thu, May 9, 2013 at 6:58 PM, Sebastien Jourdain <
sebastien.jourdain at kitware.com> wrote:

> How do you do the vtkCanvas binding within your frame ?
> Does that piece of code get executed inside the EDT ?
>
> Since you are using vtk 6, you should probably use the new rendering class
> for Java which should give you more freedom. To learn more about them, you
> can look at our sample applications inside the Wrapping/Java directory
> within the source tree.
>
> Seb
>
>
> On Thu, May 9, 2013 at 12:44 PM, Marco Sambin <m.sambin at gmail.com> wrote:
>
>> Hi all.
>>
>> In my Java application, I am using a vtkCanvas where three
>> vtkImagePlaneWidgets are displayed, each one cutting a specific section of
>> my volume (deriving from a medical data set).
>>
>> At application startup, when the GUI of my Java application is built, I
>> see for a few moments a pop-up window titled "Visualization Toolkit",
>> containing my three vtkImagePlaneWidgets. After a second or so,  this
>> window disappears, and its content is then displayed inside my vtkCanvas,
>> embedded in the GUI of my application, as expected.
>>
>> Is the appearance of this window normal? Is there a way to prevent that
>> separate "Visualization Toolkit" window from appearing, and have the
>> content displayed directly inside my vtkCanvas?
>>
>> I am running VTK 6.0 (from GIT) and Java 7 64-bit on a Windows 7 64-bit
>> PC.
>>
>> Thanks in advance for all your comments.
>> Best regards,
>>
>> Marco
>>
>>
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