[vtkusers] vtkGL2PSExporter in combination with QVTKRenderWindowInteractor

[Stefan Lau]

Hi,

I'm using the archlinux build of VTK, so the OpenGL2 backend should be 
disabled and the QT version is at 4.8.7.
I've attached the svg as displayed on my machine. I'll try the demo on 
Ubuntu tomorrow, to ensure that it's
an issue on my machine only.

- Stefan

Am 29.06.2015 um 16:23 schrieb David Lonie:
> and the attachment...
>
> On Mon, Jun 29, 2015 at 10:22 AM, David Lonie <david.lonie at kitware.com 
> <mailto:david.lonie at kitware.com>> wrote:
>
>     Running the test script works for me -- see attachment, the VTK
>     window is on the right, and the svg rendered in chrome on the left.
>
>     Some other issues that might be coming into play:
>
>     1) What Qt version are you using, and
>     2) Which OpenGL backend is being used on VTK? (Did you explicitly
>     select the experimental OpenGL2 backend while building VTK?)
>
>     Dave
>
>
>     On Mon, Jun 29, 2015 at 8:54 AM, Stefan Lau <github at stefanlau.com
>     <mailto:github at stefanlau.com>> wrote:
>
>         Hi,
>
>         I'm trying to export an image from my application created in
>         PyQt4 to a
>         vector image. While the vtkGL2PSExporter works fine from
>         outside my QT
>         application, when trying to export the image from inside it
>         the output looks corrupted. A minimal example can be found at
>         the end of this email. Did I miss something (or call something
>         incorrectly)? Is this a known issue?
>
>         Version: VTK 6.1.0
>
>         Thanks for any help,
>         Stefan Lau
>
>
>
>         Minimal Example:
>         #!/usr/bin/env python
>
>         import sys
>         import os
>         import vtk
>         from PyQt4 import QtCore, QtGui
>         from vtk.qt4.QVTKRenderWindowInteractor import
>         QVTKRenderWindowInteractor
>
>         class MainWindow(QtGui.QMainWindow):
>
>             def __init__(self, parent = None):
>                 QtGui.QMainWindow.__init__(self, parent)
>
>                 self.frame = QtGui.QFrame()
>
>                 self.vl = QtGui.QVBoxLayout()
>                 self.vtkWidget = QVTKRenderWindowInteractor(self.frame)
>                 self.vl.addWidget(self.vtkWidget)
>
>                 self.ren = vtk.vtkRenderer()
>         self.vtkWidget.GetRenderWindow().AddRenderer(self.ren)
>                 self.iren =
>         self.vtkWidget.GetRenderWindow().GetInteractor()
>
>                 # Create source
>                 source = vtk.vtkSphereSource()
>                 source.SetCenter(0, 0, 0)
>                 source.SetRadius(5.0)
>
>                 # Create a mapper
>                 mapper = vtk.vtkPolyDataMapper()
>         mapper.SetInputConnection(source.GetOutputPort())
>
>                 # Create an actor
>                 actor = vtk.vtkActor()
>                 actor.SetMapper(mapper)
>
>                 button = QtGui.QPushButton(self.frame)
>                 button.setGeometry(20, 20, 32, 32)
>         button.setIcon(QtGui.QIcon.fromTheme('document-save'))
>                 button.setToolTip('Save Visualization')
>
>         button.clicked.connect(self.store_visualization)
>
>                 self.ren.AddActor(actor)
>
>                 self.ren.ResetCamera()
>
>                 self.frame.setLayout(self.vl)
>                 self.setCentralWidget(self.frame)
>
>                 self.show()
>                 self.iren.Initialize()
>
>             def store_visualization(self, render_window):
>                 file_name = str(QtGui.QFileDialog.getSaveFileName(
>                     self,
>                     'Save Visualization',
>                     os.path.join(os.getcwd(), '/visualization.svg'),
>                     'SVG-Images (*.svg)'
>                 ))
>
>                 if len(file_name) > 0:
>                     exporter = vtk.vtkGL2PSExporter()
>         exporter.SetRenderWindow(self.vtkWidget.GetRenderWindow())
>                     exporter.SetFileFormatToSVG()
>                     exporter.CompressOff()
>                     exporter.DrawBackgroundOff()
>         exporter.SetFilePrefix(os.path.splitext(file_name)[0])
>                     exporter.Write()
>
>
>         if __name__ == "__main__":
>             app = QtGui.QApplication(sys.argv)
>             window = MainWindow()
>             sys.exit(app.exec_())
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