[vtkusers] Interactor on vtkWidget

[Jothy]

Whenever I click the distance button it create a new widget and places in
the active render window and able to manipulate independently. But the only
problem is when I want to delete anyone, all goes off!

I don't know if you want to use multiple distance widget in a single render
window.


Jothy

On Tue, Sep 21, 2010 at 3:30 PM, Leonardo M. Ramé <l.rame at griensu.com>wrote:

> On 2010-09-21 15:25:34 +0100, Jothy wrote:
> >
> > On Tue, Sep 21, 2010 at 3:20 PM, Leonardo M. Ramé <l.rame at griensu.com
> >wrote:
> >
> > > Hi, I created a vtkDistanceWidget, and added an observer to catch the
> > > "delete" key on that widget, to be able to delete it from the scene.
> > >
> > > The problem is that key events are captured for the whole interactor,
> > > and not for my specific widget. How can I know what was the active
> > > widget at the moment of pressing the delete key?.
> > >
> > >
> > > This is my code:
> > >
> > > void widgetPickObserver(vtkObject* caller, unsigned long eid, void*
> > > clientdata, void *calldata)
> > > {
> > >  qDebug(static_cast<vtkRenderWindowInteractor*>(caller)->GetKeySym());
> > > }
> > >
> > > void myClass::addDistanceWidget()
> > > {
> > >  distanceWidget = vtkDistanceWidget::New();
> > >  distanceWidget->SetInteractor(this->GetInteractor());
> > >  distanceWidget->CreateDefaultRepresentation();
> > >  static_cast<vtkDistanceRepresentation
> > > *>(distanceWidget->GetRepresentation())->SetLabelFormat("%-#6.3g mm");
> > >
> > >  vtkSmartPointer<vtkCallbackCommand> Callback =
> > > vtkSmartPointer<vtkCallbackCommand>::New();
> > >  Callback->SetCallback(widgetPickObserver);
> > >  Callback->SetClientData(distanceWidget);
> > >
> > >
>  distanceWidget->GetInteractor()->AddObserver(vtkCommand::KeyPressEvent,
> > > Callback);
> > >  distanceWidget->On();
> > > }
> > >
> > >
> > > --
> > > Leonardo M. Ramé
> > > http://leonardorame.blogspot.com
>
> > What I did in my Qt program was - used a toggle button on the toolbar to
> > enable and disable the distance widget.
> >
> > Jothy
>
> Yes, but what if you need more than one distance widgets? how do you
> know which one is selected?
>
> --
> Leonardo M. Ramé
> http://leonardorame.blogspot.com
>
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