VTK/Examples/Python/Interaction/MouseEvents

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VTK Examples Baseline Interaction TestMouseEvents.png

This example creates a new vtkInteractorStyle which can be used to implement custom reactions on user events. If you just want to disable single events you can also have a look at VTK/Examples/Python/Interaction/MouseEventsObserver. This specific example just prints a simple message and then calls the original eventhandler of the vtkInteractorStyleTrackballCamera.

MouseEvents.py

import vtk
 
class MyInteractorStyle(vtk.vtkInteractorStyleTrackballCamera):
        def __init__(self,parent=None):
                self.AddObserver("MiddleButtonPressEvent",self.middleButtonPressEvent)
                self.AddObserver("MiddleButtonReleaseEvent",self.middleButtonReleaseEvent)
 
        def middleButtonPressEvent(self,obj,event):
                print "Middle Button pressed"
                self.OnMiddleButtonDown()
                return
 
        def middleButtonReleaseEvent(self,obj,event):
                print "Middle Button released"
                self.OnMiddleButtonUp()
                return
 
 
source = vtk.vtkSphereSource()
source.SetCenter(0,0,0)
source.SetRadius(1)
source.Update()
 
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(source.GetOutputPort())
 
actor = vtk.vtkActor()
actor.SetMapper(mapper)
 
renderer = vtk.vtkRenderer()
renderer.SetBackground(1,1,1)
renderer.AddActor(actor)
 
renwin = vtk.vtkRenderWindow()
renwin.AddRenderer(renderer)
 
interactor = vtk.vtkRenderWindowInteractor()
interactor.SetInteractorStyle(MyInteractorStyle())
interactor.SetRenderWindow(renwin)
 
interactor.Initialize()
interactor.Start()
Retrieved from "http://www.vtk.org/Wiki/VTK/Examples/Python/Interaction/MouseEvents"
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