<div dir="ltr"><div>I replaced the line "iren.AddObserver(vtk.vtkCommand.TimerEvent,observer)" with<br>iren.AddObserver(vtk.vtkCommand.TimerEvent,observer,100000.) (also tried 10.0 instead of 100000.)<br></div><div><br></div><div>Still no TimerEvents are reported as long as the mouse button is pressed.</div><div><br></div><div>How are events consumed? My understanding is that AddObserver(...) adds just another listener, and that all listeners registered for a specific event are invoked one after the other. Which function would "consume" events in an interactor style? Is it possible to circumvent the consuming of events, or to re-emit the event after it has been consumed?</div><div>Thank you</div><div>Kolja</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Nov 14, 2017 at 5:53 PM, Ken Martin <span dir="ltr"><<a href="mailto:ken.martin@kitware.com" target="_blank">ken.martin@kitware.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I suspect timer events are fired but something else is consuming them. Probably in the interactor style. Try adding your timer events with a higher priority like 10.0 (third argument).</div><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="h5">On Mon, Nov 13, 2017 at 3:21 PM, Kolja Petersen <span dir="ltr"><<a href="mailto:petersenkolja@gmail.com" target="_blank">petersenkolja@gmail.com</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5"><div dir="ltr"><span style="font-size:12.8px">Heya,</span><br style="font-size:12.8px"><span style="font-size:12.8px">I paste some code below, which displays an empty vtkRenderWindow with an interactor. The interactor fires a TimerEvent every 100ms as printed by the Observer.</span><br style="font-size:12.8px"><span style="font-size:12.8px">The problem: as long as I press a mouse button in the vtkRenderWindow, the TimerEvents stop to be reported, although I need to process data periodically in my application as a reaction to those TimerEvents.</span><br style="font-size:12.8px"><br style="font-size:12.8px"><span style="font-size:12.8px">Why are no TimerEvents fired while a button is pressed, and how can I change this behaviour?</span><br style="font-size:12.8px"><span style="font-size:12.8px">Thank you</span><br style="font-size:12.8px"><span style="font-size:12.8px">Kolja</span><br style="font-size:12.8px"><br style="font-size:12.8px"><span style="font-size:12.8px">import vtk</span><br style="font-size:12.8px"><br style="font-size:12.8px"><span style="font-size:12.8px">class Observer(object):</span><br style="font-size:12.8px"><span style="font-size:12.8px"> def __init__(self):</span><br style="font-size:12.8px"><span style="font-size:12.8px"> self.cnt=0</span><br style="font-size:12.8px"><span style="font-size:12.8px"> def __call__(self,caller,evt):</span><br style="font-size:12.8px"><span style="font-size:12.8px"> self.cnt+=1</span><br style="font-size:12.8px"><span style="font-size:12.8px"> print "count %d %s" % (self.cnt,evt)</span><br style="font-size:12.8px"><br style="font-size:12.8px"><span style="font-size:12.8px">ren1 = vtk.vtkRenderer()</span><br style="font-size:12.8px"><span style="font-size:12.8px">ren1.SetBackground(0.1, 0.2, 0.4)</span><br style="font-size:12.8px"><br style="font-size:12.8px"><span style="font-size:12.8px">renWin = vtk.vtkRenderWindow()</span><br style="font-size:12.8px"><span style="font-size:12.8px">renWin.AddRenderer(ren1)</span><br style="font-size:12.8px"><span style="font-size:12.8px">renWin.SetSize(300, 300)</span><br style="font-size:12.8px"><br style="font-size:12.8px"><span style="font-size:12.8px">iren = vtk.vtkRenderWindowInteractor(</span><span style="font-size:12.8px"><wbr>)</span><br style="font-size:12.8px"><span style="font-size:12.8px">iren.SetRenderWindow(renWin)</span><br style="font-size:12.8px"><br style="font-size:12.8px"><span style="font-size:12.8px">style = vtk.</span><span style="font-size:12.8px">vtkInteractorStyleTrackbal<wbr>lCam</span><span style="font-size:12.8px">era()</span><br style="font-size:12.8px"><span style="font-size:12.8px">iren.SetInteractorStyle(style)</span><br style="font-size:12.8px"><br style="font-size:12.8px"><span style="font-size:12.8px">iren.Initialize()</span><br style="font-size:12.8px"><span style="font-size:12.8px">observer=Observer()</span><br style="font-size:12.8px"><span style="font-size:12.8px">iren.AddObserver(vtk.</span><span style="font-size:12.8px">vtkComman<wbr>d.TimerEvent,</span><span style="font-size:12.8px">observer)</span><br style="font-size:12.8px"><span style="font-size:12.8px">iren.AddObserver(vtk.</span><span style="font-size:12.8px">vtkComman<wbr>d.MouseMoveEvent,</span><span style="font-size:12.8px">observer)</span><br style="font-size:12.8px"><span style="font-size:12.8px">iren.AddObserver(vtk.</span><span style="font-size:12.8px">vtkComman<wbr>d.InteractionEvent,</span><span style="font-size:12.8px">observer)</span><br style="font-size:12.8px"><span style="font-size:12.8px">iren.CreateRepeatingTimer(100)</span><br style="font-size:12.8px"><span style="font-size:12.8px">iren.Start()</span><br></div><div id="m_-5995428116567439952m_5020402281578617109DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br> <table style="border-top:1px solid #d3d4de">
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<br></blockquote></div><span class="HOEnZb"><font color="#888888"><br><br clear="all"><div><br></div>-- <br><div class="m_-5995428116567439952gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>Ken Martin PhD<div>Distinguished Engineer<br><span style="font-size:12.8px">Kitware Inc.</span><br></div><div><a href="https://maps.google.com/?q=28+Corporate+Drive+Clifton+Park+NY+12065&entry=gmail&source=g">28 Corporate Drive</a><br><a href="https://maps.google.com/?q=28+Corporate+Drive+Clifton+Park+NY+12065&entry=gmail&source=g">Clifton Park NY 12065</a><br><div><br></div><div><span style="font-size:10pt;font-family:Tahoma,sans-serif">This communication,
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