[vtkusers] Change mouse cursor while hovering on vtkSphereWidget

[Cory Quammen]

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.
>> > _______________________________________________
>> > 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://public.kitware.com/mailman/listinfo/vtkusers
>
>
>
>
> --
> I live a simple life...  in 0s and 1s !