/usr/lib/python2.7/dist-packages/vtk/gtk/GtkVTKRenderWindowInteractor.py is in python-vtk6 6.3.0+dfsg1-5.
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Description:
Provides a pyGtk vtkRenderWindowInteractor widget. This embeds a
vtkRenderWindow inside a GTK widget and uses the
vtkGenericRenderWindowInteractor for the event handling. This is
based on vtkTkRenderWindow.py.
The class uses the gtkgl.GtkGLArea widget (gtkglarea). This avoids
a lot of problems with flicker.
There is a working example at the bottom.
Created by Prabhu Ramachandran, April 2002.
Bugs:
(*) There is a focus related problem. Tkinter has a focus object
that handles focus events. I dont know of an equivalent object
under GTK. So, when an 'enter_notify_event' is received on the
GtkVTKRenderWindow I grab the focus but I dont know what to do when
I get a 'leave_notify_event'.
(*) Will not work under Win32 because it uses the XID of a window in
OnRealize. Suggestions to fix this will be appreciated.
"""
import gtk, GDK, gtkgl
import vtk
import math
class GtkVTKRenderWindowInteractor(gtkgl.GtkGLArea):
""" Embeds a vtkRenderWindow into a pyGTK widget and uses
vtkGenericRenderWindowInteractor for the event handling. This
class embeds the RenderWindow correctly. A __getattr__ hook is
provided that makes the class behave like a
vtkGenericRenderWindowInteractor."""
def __init__(self, *args):
l = list(args)
attr = (gtkgl.RGBA, gtkgl.DOUBLEBUFFER)
l.insert(0, self)
l.insert(1, attr)
apply(gtkgl.GtkGLArea.__init__, l)
self._RenderWindow = vtk.vtkRenderWindow()
# private attributes
self.__Created = 0
self._ActiveButton = 0
self._Iren = vtk.vtkGenericRenderWindowInteractor()
self._Iren.SetRenderWindow(self._RenderWindow)
self._Iren.AddObserver('CreateTimerEvent', self.CreateTimer)
self._Iren.AddObserver('DestroyTimerEvent', self.DestroyTimer)
self.ConnectSignals()
# need this to be able to handle key_press events.
self.set_flags(gtk.CAN_FOCUS)
# default size
self.set_usize(300, 300)
def set_usize(self, w, h):
gtkgl.GtkGLArea.set_usize(self, w, h)
self._RenderWindow.SetSize(w, h)
self._Iren.SetSize(w, h)
self._Iren.ConfigureEvent()
def ConnectSignals(self):
self.connect("realize", self.OnRealize)
self.connect("expose_event", self.OnExpose)
self.connect("configure_event", self.OnConfigure)
self.connect("button_press_event", self.OnButtonDown)
self.connect("button_release_event", self.OnButtonUp)
self.connect("motion_notify_event", self.OnMouseMove)
self.connect("enter_notify_event", self.OnEnter)
self.connect("leave_notify_event", self.OnLeave)
self.connect("key_press_event", self.OnKeyPress)
self.connect("delete_event", self.OnDestroy)
self.add_events(GDK.EXPOSURE_MASK| GDK.BUTTON_PRESS_MASK |
GDK.BUTTON_RELEASE_MASK |
GDK.KEY_PRESS_MASK |
GDK.POINTER_MOTION_MASK |
GDK.POINTER_MOTION_HINT_MASK |
GDK.ENTER_NOTIFY_MASK | GDK.LEAVE_NOTIFY_MASK)
def __getattr__(self, attr):
"""Makes the object behave like a
vtkGenericRenderWindowInteractor"""
if attr == '__vtk__':
return lambda t=self._Iren: t
elif hasattr(self._Iren, attr):
return getattr(self._Iren, attr)
else:
raise AttributeError, self.__class__.__name__ + \
" has no attribute named " + attr
def CreateTimer(self, obj, event):
gtk.timeout_add(10, self._Iren.TimerEvent)
def DestroyTimer(self, obj, event):
"""The timer is a one shot timer so will expire automatically."""
return 1
def GetRenderWindow(self):
return self._RenderWindow
def Render(self):
if self.__Created:
self._RenderWindow.Render()
def OnRealize(self, *args):
if self.__Created == 0:
# you can't get the xid without the window being realized.
self.realize()
win_id = str(self.get_window().xid)
self._RenderWindow.SetWindowInfo(win_id)
self._Iren.Initialize()
self.__Created = 1
return gtk.TRUE
def OnConfigure(self, wid, event=None):
sz = self._RenderWindow.GetSize()
if (event.width != sz[0]) or (event.height != sz[1]):
self._Iren.SetSize(event.width, event.height)
self._Iren.ConfigureEvent()
return gtk.TRUE
def OnExpose(self, *args):
self.Render()
return gtk.TRUE
def OnDestroy(self, event=None):
self.hide()
del self._RenderWindow
self.destroy()
return gtk.TRUE
def _GetCtrlShift(self, event):
ctrl, shift = 0, 0
if ((event.state & GDK.CONTROL_MASK) == GDK.CONTROL_MASK):
ctrl = 1
if ((event.state & GDK.SHIFT_MASK) == GDK.SHIFT_MASK):
shift = 1
return ctrl, shift
def OnButtonDown(self, wid, event):
"""Mouse button pressed."""
m = self.get_pointer()
ctrl, shift = self._GetCtrlShift(event)
self._Iren.SetEventInformationFlipY(m[0], m[1], ctrl, shift,
chr(0), 0, None)
button = event.button
if button == 3:
self._Iren.RightButtonPressEvent()
return gtk.TRUE
elif button == 1:
self._Iren.LeftButtonPressEvent()
return gtk.TRUE
elif button == 2:
self._Iren.MiddleButtonPressEvent()
return gtk.TRUE
else:
return gtk.FALSE
def OnButtonUp(self, wid, event):
"""Mouse button released."""
m = self.get_pointer()
ctrl, shift = self._GetCtrlShift(event)
self._Iren.SetEventInformationFlipY(m[0], m[1], ctrl, shift,
chr(0), 0, None)
button = event.button
if button == 3:
self._Iren.RightButtonReleaseEvent()
return gtk.TRUE
elif button == 1:
self._Iren.LeftButtonReleaseEvent()
return gtk.TRUE
elif button == 2:
self._Iren.MiddleButtonReleaseEvent()
return gtk.TRUE
return gtk.FALSE
def OnMouseMove(self, wid, event):
"""Mouse has moved."""
m = self.get_pointer()
ctrl, shift = self._GetCtrlShift(event)
self._Iren.SetEventInformationFlipY(m[0], m[1], ctrl, shift,
chr(0), 0, None)
self._Iren.MouseMoveEvent()
return gtk.TRUE
def OnEnter(self, wid, event):
"""Entering the vtkRenderWindow."""
self.grab_focus()
m = self.get_pointer()
ctrl, shift = self._GetCtrlShift(event)
self._Iren.SetEventInformationFlipY(m[0], m[1], ctrl, shift,
chr(0), 0, None)
self._Iren.EnterEvent()
return gtk.TRUE
def OnLeave(self, wid, event):
"""Leaving the vtkRenderWindow."""
m = self.get_pointer()
ctrl, shift = self._GetCtrlShift(event)
self._Iren.SetEventInformationFlipY(m[0], m[1], ctrl, shift,
chr(0), 0, None)
self._Iren.LeaveEvent()
return gtk.TRUE
def OnKeyPress(self, wid, event):
"""Key pressed."""
m = self.get_pointer()
ctrl, shift = self._GetCtrlShift(event)
keycode, keysym = event.keyval, event.string
key = chr(0)
if keycode < 256:
key = chr(keycode)
self._Iren.SetEventInformationFlipY(m[0], m[1], ctrl, shift,
key, 0, keysym)
self._Iren.KeyPressEvent()
self._Iren.CharEvent()
return gtk.TRUE
def OnKeyRelease(self, wid, event):
"Key released."
m = self.get_pointer()
ctrl, shift = self._GetCtrlShift(event)
keycode, keysym = event.keyval, event.string
key = chr(0)
if keycode < 256:
key = chr(keycode)
self._Iren.SetEventInformationFlipY(m[0], m[1], ctrl, shift,
key, 0, keysym)
self._Iren.KeyReleaseEvent()
return gtk.TRUE
def Initialize(self):
if self.__Created:
self._Iren.Initialize()
def main():
# The main window
window = gtk.GtkWindow(gtk.WINDOW_TOPLEVEL)
window.set_title("A GtkVTKRenderWindow Demo!")
window.connect("destroy", gtk.mainquit)
window.connect("delete_event", gtk.mainquit)
window.set_border_width(10)
# A VBox into which widgets are packed.
vbox = gtk.GtkVBox(spacing=3)
window.add(vbox)
vbox.show()
# The GtkVTKRenderWindow
gvtk = GtkVTKRenderWindowInteractor()
#gvtk.SetDesiredUpdateRate(1000)
gvtk.set_usize(400, 400)
vbox.pack_start(gvtk)
gvtk.show()
gvtk.Initialize()
gvtk.Start()
# prevents 'q' from exiting the app.
gvtk.AddObserver("ExitEvent", lambda o,e,x=None: x)
# The VTK stuff.
cone = vtk.vtkConeSource()
cone.SetResolution(80)
coneMapper = vtk.vtkPolyDataMapper()
coneMapper.SetInputConnection(cone.GetOutputPort())
#coneActor = vtk.vtkLODActor()
coneActor = vtk.vtkActor()
coneActor.SetMapper(coneMapper)
coneActor.GetProperty().SetColor(0.5, 0.5, 1.0)
ren = vtk.vtkRenderer()
gvtk.GetRenderWindow().AddRenderer(ren)
ren.AddActor(coneActor)
# A simple quit button
quit = gtk.GtkButton("Quit!")
quit.connect("clicked", gtk.mainquit)
vbox.pack_start(quit)
quit.show()
# show the main window and start event processing.
window.show()
gtk.mainloop()
if __name__ == "__main__":
main()
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