[vtkusers] Change mouse cursor while hovering on vtkSphereWidget

[Alok]

Hi,

I sub-classed vtkAbstractWidget and created a vtkSphereWidget3.
 It seems to be working as expected when I use it in this example :
http://www.vtk.org/Wiki/VTK/Examples/Cxx/Widgets/SphereWidget2

I think that 'mouse cursor change on hover' feature is a desirable one
since it indicates to the user that interaction with a sphere is possible
and expected.

I would like to know how I can commit this piece of code for review and
inclusion into the vtk repository.

Thanks


On Fri, Oct 10, 2014 at 10:15 AM, Cory Quammen <cory.quammen at kitware.com>
wrote:

> Alok,
>
> What I usually do is copy and paste an existing class and then modify
> it appropriately, e.g., renamed the class, change the parent class,
> remove unneeded member variables, methods, change the comments for the
> class, etc. In your case, I would copy the vtkSphereWidget2 class to a
> new class (vtkSphereWidget3?) and copy in the implementation for
> SetCursor() in vtkHandleWidget, then be sure to declare this method in
> your classes header file.
>
> - Cory
>
> On Fri, Oct 10, 2014 at 9:53 AM, Alok <alok.theanomaly at gmail.com> wrote:
> > Thanks Cory
> > I dont have experience with subclassing vtk classes yet. Is there any
> other
> > class that you can suggest as a reference to look at while going about
> this?
> >
> >
> >
> > On Thu, Oct 9, 2014 at 5:13 PM, Cory Quammen <cory.quammen at kitware.com>
> > wrote:
> >>
> >> I think you will have to subclass vtkSphereWidget2 and override the
> >> SetCursor() method. The SetCursor() method for vtkHandleWidget is
> >>
> >>
> >>
> //-------------------------------------------------------------------------
> >> void vtkHandleWidget::SetCursor(int cState)
> >> {
> >>   if ( this->ManagesCursor )
> >>     {
> >>     switch (cState)
> >>       {
> >>       case vtkHandleRepresentation::Outside:
> >>         this->RequestCursorShape(VTK_CURSOR_DEFAULT);
> >>         break;
> >>       default:
> >>         this->RequestCursorShape(VTK_CURSOR_HAND);
> >>       }
> >>     }
> >> }
> >>
> >> I imagine you would want the same in your subclass.
> >>
> >> HTH,
> >> Cory
> >>
> >> On Thu, Oct 9, 2014 at 5:03 PM, junior <alok.theanomaly at gmail.com>
> wrote:
> >> > Hi,
> >> >
> >> > I want the mouse cursor to change to a 'hand' when the mouse is
> hovering
> >> > over a vtkSphereWidget.
> >> > Is there any out of box solution for this or do I need to subclass? I
> >> > tried
> >> > using vtkSphereWidget2 and setting ManagesCursorOn() to true but that
> >> > did
> >> > not help.
> >> >
> >> > I see that the vtkAngleWidget exhibits the said behavior when mouse
> >> > hovers
> >> > above one of the three control points which in my understanding are
> >> > vtkHandleWidgets.
> >> >
> >> > Any suggestions??
> >> > Thanks
> >> >
> >> >
> >> >
> >> > --
> >> > View this message in context:
> >> >
> http://vtk.1045678.n5.nabble.com/Change-mouse-cursor-while-hovering-on-vtkSphereWidget-tp5729100.html
> >> > Sent from the VTK - Users mailing list archive at Nabble.com.
> >> > _______________________________________________
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>



-- 
I live a simple life...  in 0s and 1s !
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