[vtkusers] modify a text in the renderer with the mose move event

[RimAY]

Thanks for your reply,

this is the function that i used:

def print_text(renwinInteractor, event):
    x1, y1 = renwinInteractor.GetEventPosition()
    picker = vtk.vtkPointPicker()
    picker.PickFromListOn()
    picker.AddPickList(actorVTK)
    picker.SetTolerance(0.01)
    picker.Pick(x1, y1, 0, renderer)
    pickPos = picker.GetPickPosition() 
    cellId = picker.GetPointId()

    interactor.ShowCursor()
    interactor.LightFollowCameraOn()

    if cellId==-1:
        return 0
    else:
        Tactorx = vtkTextActor()
        cx = str(x1)
        Tactorx.SetInput(cx)
        Tactorx.SetDisplayPosition(70,175)
        Tactorx.GetTextProperty().SetJustificationToCentered()
        renderer.AddActor(Tactorx)
        Tactorx.Modified()
interactor.AddObserver('MouseMoveEvent', print_text)

interactor is the vtkRenderWindowInteractor() and actorVTK is a vtkActor():

readerVTK.SetFileName("vtp file")
mapperVTK.SetInput(readerVTK.GetOutput())
actorVTK.SetMapper(mapperVTK)

Thanks


David Doria-2 wrote:
> 
> On Wed, Nov 18, 2009 at 2:25 AM, RimAY <rim.ayari at gmail.com> wrote:
>>
>> Dear All ,
>> Can someone give me an idea how can i change a text in the renderer with
>> the
>> mouse move event.
>> I try with vtktextactor this is the part of my code:
>>
>> Tactorx = vtkTextActor()
>> Tactorx.SetInput(cx)
>> Tactorx.SetDisplayPosition(70,170)
>> Tactorx.GetTextProperty().SetJustificationToCentered()
>> renderer.AddActor(Tactorx)
>> Tactorx.Modified()
>>
>> cx change its value with the mose move, i get the new value above the
>> ancien
>> one, the result is an illegible text :(
>>
>> Thanks a lot
> 
> Can you provide the smallest compilable example of your problem?
> 
> Thanks,
> 
> David
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