[vtkusers] Problems with vtkTkRenderWidget

[hhiraki at lab.nig.ac.jp]

Hello Jose,
I have found some problems on destroying a vtkTkRenderWidget 
in Tcl/Tk on linux, too. Though they may not be same as yours, 
I hope these workarounds help you.

1. "[$renWin GetInteractor] Delete" is required if the 
   vtkGenericRenderWindowInteractor is created implicitly in 
   ::vtk::bind_tk_render_widget.
2. "$renWin MakeCurrent" is sometimes required (maybe when 
   the vtkRenderWindow is created implicitly in the widget).
3. "rename $widget {}" is required as "destroy $widget" is 
   not enough to remove the command.

# Hello Sebastien,
# I think vtkRenderWindow and vtkGenericRenderWindowInteractor 
# shouldn't be settable parameters but be integrated parts of 
# vtkTkRenderWidget sharing their lives with the widget. 
# How do you think?

Hideaki Hiraki


From: jose beotegui <jmbeotegui at yahoo.es>
Subject: [vtkusers] Problems with vtkTkRenderWidget
Date: Fri, 17 Jan 2003 13:40:06 +0100 (CET)
> Hi,
> 
> I'm using VTK 4.0 and Tcl/Tk on Windows.
> I have done an interface using Tk and I've used a vtkTkRenderWidget 
> to render a volume and I've packed altogether.
> I wish to destroy only the vtkTkRenderWidget but appears 
> a message like this:
> "A TkRenderWidget is being destroyed before it 
> associated vtkRenderWindow is destroyed. This is very bad and usually 
> due to the order in which objects are being destroyed. 
> Always destroy the vtkRenderWindow before destroying the user 
> interface components".
> 
> But I've destroyed that vtkRenderWindow  before.
> How can I resolve it?
> 
> Thanks in advance.
> 
> Code example
> 
> 
> wm withdraw .
> toplevel .visor
> frame .visor.f1
> vtkTkRenderWidget .visor.f1.video -width 400 -height 400 -rw renWin
> 
> pack .visor.f1.video -fill both -expand t
> pack .visor.f1  -fill both -expand t
> 
> renWin Delete
> destroy .visor.f1.video
> 
> 
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