[vtkusers] vtkChartLegend Position in Python

[Slaughter, Andrew E]

Yes, that function does not exist.

On Thu, Oct 8, 2015 at 12:45 PM, Cory Quammen <cory.quammen at kitware.com>
wrote:

> Hi Andrew,
>
> Have you tried vtkChartXY::SetLegendPosition(const vtkRectf & rect), e.g.
>
> rect = vtkRectf(0, 20, ?, ?)
> char.SetLegendPosition(rect)
>
> HTH,
> Cory
>
> On Thu, Oct 8, 2015 at 2:33 PM, Slaughter, Andrew E <
> andrew.slaughter at inl.gov> wrote:
>
>> I am writing a script to build some line charts in VTK, but I am having
>> difficulty repositioning a vtkChartLegend object.
>>
>> The python script below will create a plot. I would like to reposition
>> the legend to the upper left-hand side of the chart so as to not interfere
>> with the line plot. However, I am not able to make the legend move. I would
>> appreciate any help to get the legend to re-position?
>>
>> I am running OSX (Yosemite) with Python 2.7.6 and VTK 6.3.
>>
>>
>> #!/usr/bin/env python
>> import vtk
>>
>> # Num. points
>> n = 10
>>
>> # Create some data
>> x = vtk.vtkFloatArray()
>> y = vtk.vtkFloatArray()
>> x.SetNumberOfTuples(n)
>> x.SetName('x')
>> y.SetNumberOfTuples(n)
>> y.SetName('y')
>>
>> for i in range(10):
>>     x.SetValue(i, float(i))
>>     y.SetValue(i, float(2*i))
>>
>> # Create the table and line
>> table = vtk.vtkTable()
>> table.AddColumn(x)
>> table.AddColumn(y)
>> line = vtk.vtkPlotLine()
>> line.SetInputData(table, 0, 1)
>>
>> # Create chart
>> chart = vtk.vtkChartXY()
>> chart.AddPlot(line)
>>
>> # Create view
>> view = vtk.vtkContextActor()
>> view.GetScene().AddItem(chart)
>>
>> # Renderer
>> renderer = vtk.vtkRenderer()
>> renderer.SetBackground(1,1,1)
>> renderer.AddViewProp(view)
>>
>> # Legend
>> chart.SetShowLegend(True)
>> legend = chart.GetLegend()
>> legend.SetPoint(0, 20) # This doesn't seem to do anything
>>
>> # Window
>> window = vtk.vtkRenderWindow()
>> window.AddRenderer(renderer)
>>
>> # Interactor
>> interactor = vtk.vtkRenderWindowInteractor()
>> interactor.SetRenderWindow(window)
>>
>> # Render
>> window.Render()
>> renderer.Render()
>> interactor.Start()
>>
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>
>
> --
> Cory Quammen
> R&D Engineer
> Kitware, Inc.
>
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