[vtkusers] Change mouse cursor while hovering on vtkSphereWidget

[Cory Quammen]

(previous message sent too early on accident)

Alok,

This is the standard way for developers to contribute to VTK:

http://www.vtk.org/Wiki/VTK/Git/Develop

Please let us know if any of these instructions need clarification.

Thanks,
Cory

On Mon, Oct 13, 2014 at 3:48 PM, Cory Quammen <cory.quammen at kitware.com> wrote:
> Alok,
>
> This is the standard way for developers to contribute to VTK:
>
>
> On Mon, Oct 13, 2014 at 3:12 PM, Alok <alok.theanomaly at gmail.com> wrote:
>> 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 !