[vtkusers] Which interactor style to use..??

[Paweł~~Łubniewski]

Hello Rakesh,

I remember an example which is related to double click:

   http://www.vtk.org/Wiki/VTK_Mouse_Picking

But the principles exactly the same as Allan had explained.

Regards,
Pawel~
_________________
Paweł~~Łubniewski
__________________________________________________________________________

2010/3/10 Allan James <ar.james at qut.edu.au>

>
> Hi Rakesh,
>
>
> There are numerous ways to capture double-clicks... The (simple and
> incomplete) example below essentially counts the number of clicks that have
> occurred when mouse is not moving. When the has moved more pixels than
> resetPixelDistance, number of clicks is reset.
>
> Attach the callback to your interactor style to capture these events:
> "LeftButtonPressEvent", "LeftButtonReleaseEvent" and "MouseMoveEvent"
>
> This should give you an idea for one way to approach this, another way
> would be to instead include a timer so that double-click needs to occur
> within a specified time interval.
>
> --------------
>
> void MyCallback::Execute(vtkObject *caller, unsigned long eventId, void*
> data)
> {
>        if(eventId == vtkCommand::LeftButtonPressEvent)
>        {
>                // propogate event
>                if(sceneRenderWindowInteractorStyle)
>
>  sceneRenderWindowInteractorStyle->OnLeftButtonDown();
>
>        }
>        else if(eventId == vtkCommand::LeftButtonReleaseEvent)
>        {
>                numClicks++;
>
>                if(numClicks >= 2)
>                {
>                        // this block is executed on double-click
>
>                        numClicks = 0;
>
>                        int pickPosition[2];
>
>  sceneRenderWindowInteractor->GetEventPosition(pickPosition);
>                }
>
>                // propogate event
>                if(sceneRenderWindowInteractorStyle)
>                        sceneRenderWindowInteractorStyle->OnLeftButtonUp();
>        }
>        else if(eventId == vtkCommand::MouseMoveEvent)
>        {
>                if(numClicks > 0)
>                {
>                        int pickPosition[2];
>
>  sceneRenderWindowInteractor->GetEventPosition(pickPosition);
>
>                        int xdist = pickPosition[0]-prevPosition[0];
>                        int ydist = pickPosition[1]-prevPosition[1];
>
>                        prevPosition[0] = pickPosition[0];
>                        prevPosition[1] = pickPosition[1];
>
>                        int moveDistance = (int)sqrt((double)(xdist*xdist +
> ydist*ydist));
>
>                        // Reset numClicks - If mouse moved further than
> resetPixelDistance
>                        if(moveDistance > resetPixelDistance)
>                                numClicks = 0;
>                }
>
>                // propogate event
>                if(sceneRenderWindowInteractorStyle)
>                        sceneRenderWindowInteractorStyle->OnMouseMove();
>        }
> }
>
> MyCallback::MyCallback()
> {
>        numClicks = 0;
>        resetPixelDistance = 10;
>        prevPosition[0] = prevPosition[1] = 0;
> }
>
> ---------------
>
> Allan James
> High Performance Computing & Research Support
> Queensland University of Technology
> (07) 3138 9264
> ar.james at qut.edu.au
> http://www.qut.edu.au/its/hpc
>
> ><(((º>  ._.·´¯`·..  >++(((º>  ._.·´¯`·..  >++(((º>
>
>
> > You can catch keys like this:
> > http://vtk.org/Wiki/VTK/Examples/Interaction/KeypressEvents
> >
> > Double click is a good question - anyone have any ideas?
> >
> > Thanks,
> >
> > David
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
> > URL:
> > <http://www.vtk.org/pipermail/vtkusers/attachments/20100309/c1
> > 74cdfc/attachment-0001.htm>
> >
> > ------------------------------
> >
> > Message: 12
> > Date: Tue, 9 Mar 2010 09:53:47 -0500
> > From: David Doria <daviddoria+vtk at gmail.com <daviddoria%2Bvtk at gmail.com>
> >
> > Subject: Re: [vtkusers] Which interactor style to use..??
> > To: Rakesh Patil <rakeshthp at in.com>
> > Cc: vtkusers <vtkusers at vtk.org>
> > Message-ID:
> >       <c19fcadc1003090653odcbd660xb233091f6f7d2b22 at mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > On Tue, Mar 9, 2010 at 7:52 AM, Rakesh Patil <rakeshthp at in.com> wrote:
> >
> > > Hello,
> > >
> > > I need to catch double click event,.. Is there any
> > interactor style that
> > > has this facility..?? Also, i need catch keypress events,
> > like deleting
> > > objects by pressing delete button..
> > >
> > > How do i do this..??
> > >
> > > Thanks in advance
> > >
> > > Regards
> > > Rakesh Patil
> > >
> > >
>
>
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20100310/ca7b5d87/attachment.htm>