[vtkusers] vtkChartXY, QVTKRenderWindowInteractor, PyQt4

[Randy Heiland]

If I change the names (SetName) of the arrays, the axes labels on the rendered chart do not change, i.e. they're still "X Axis", "Y Axis".  Suggestions?

>>> print vtk.vtkVersion.GetVTKVersion()
5.9.0

thanks, Randy

On Jul 22, 2011, at 10:51 PM, Randy Heiland wrote:

> For the archive, the following seems to do what I need (until it doesn't):
> 
> #  -------  gui-chart.py ------------
> import sys
> from vtk import *
> from vtk.qt4.QVTKRenderWindowInteractor  import QVTKRenderWindowInteractor 
> from PyQt4 import Qt 
> from PyQt4 import QtGui 
> 
> class test(Qt.QMainWindow):
>    def __init__(self, parent=None):
>        Qt.QMainWindow.__init__(self, parent)
>        self.setWindowTitle(self.tr("PyQt4 vtkChartXY"))
>        self.workspace = Qt.QWorkspace()
>        self.setCentralWidget(self.workspace)
>        self.frame = QtGui.QFrame(self.workspace)
>        self.hbox = QtGui.QHBoxLayout()
> 
>        self.widget = QVTKRenderWindowInteractor(self.frame)
>        self.widget.Initialize()
>        self.widget.Start()
> 
>        self.table = vtkTable()
>        self.arrX = vtkFloatArray()
>        self.arrX.SetName("X Axis")
>        self.table.AddColumn(self.arrX)
> 
>        self.arrY = vtkFloatArray()
>        self.arrY.SetName("Y value")
>        self.table.AddColumn(self.arrY)
> 
>        numPoints = 20
>        inc = 7.5 / (numPoints-1)
>        self.table.SetNumberOfRows(numPoints)
>        for i in range(numPoints):
>            self.table.SetValue(i, 0, i * inc)
>            self.table.SetValue(i, 1, i * inc)
> 
>        self.view = vtkContextView()
>        self.view.GetRenderer().SetBackground(1.0, 1.0, 1.0)
> 
>        self.chart = vtkChartXY()
>        self.view.GetScene().AddItem(self.chart)
>        self.line = self.chart.AddPlot(vtkChart.LINE)
>        self.line.SetInput(self.table, 0, 1)
> 
>        self.ren = self.view.GetRenderer()
>        self.renWin = self.widget.GetRenderWindow()
>        self.renWin.AddRenderer(self.ren)
> 
>        self.hbox.addWidget(self.widget)
>        self.frame.setLayout(self.hbox)
>        self.workspace.addWindow(self.frame)
> 
> if __name__ == "__main__":
>     app = Qt.QApplication(sys.argv)
>     mainwindow = test()
>     mainwindow.show()
>     sys.exit(app.exec_())
> 
> On Jul 22, 2011, at 5:47 PM, Randy Heiland wrote:
> 
>> Hi gang,
>> 
>> I'm having problems getting a vtkChartXY displayed in PyQt4.  I saw a thread related to this (vtkContextView and QWidget), but didn't see a solution for Python-land.  I'll include 2 example scripts - the 1st works, the 2nd does not.
>> 
>> thanks for any help, Randy
>> <snip>
>