[vtkusers] Qt & VTK 2d plotting

[Justin Giles]

Ok, I added a style to my interactor in the following way:

//code
    vtkRenderWindow *renderWindow = vtkRenderWindow::New();
    renderWindow->SetSize(550, 450);
    renderWindow->AddRenderer(renderer);
    vtkRenderWindowInteractor* inter = QVTKInteractor::New();
    renderWindow->SetInteractor(inter);
    vtkInteractorStyleImage* interstyle = vtkInteractorStyleImage::New();
    inter->SetInteractorStyle(interstyle);
    view->SetRenderWindow(renderWindow);
//end code

(where view = QVTKWidget)

And, I still get the same results.  Instead of a nice plot, I just get a
blank white screen.  Thoughts?  Am I doing something wrong?

Thanks,

Justin

On Mon, Feb 23, 2009 at 11:20 AM, Clinton Stimpson <clinton at elemtech.com>wrote:

>
> Interaction is handled by the interactor style classes.
> http://www.vtk.org/doc/nightly/html/classvtkInteractorStyle.html
>
> You can use an existing style, or make your own and give it to the
> interactor.
>
> Clint
>
> Justin Giles wrote:
>
>> I am able to create a 2d plot using a QVTKWidget, however I am unable to
>> interact with that plot.  I pretty much new to VTK, so I am kind of at a
>> loss as to how to connect the vtk interactors and Qt.  I have poked around a
>> bit and noticed a QVTKInteractor class, but anything I do with that results
>> in my 2d plot going away to be replaced with a blank white area.  Below is
>> the code that I am using.  Just as a note, this is being done in a class
>> that extends a QMainWindow.
>>
>> //snippet//
>>
>>
>>    view = new QVTKWidget;
>>    setCentralWidget(view);
>>
>>    int DIM = 500;
>>    vtkDataArray *dataArray1 = vtkDataArray::CreateDataArray(VTK_FLOAT);
>>    dataArray1->SetNumberOfTuples(DIM);
>>
>>    vtkDataArray *dataArray2 = vtkDataArray::CreateDataArray(VTK_FLOAT);
>>    dataArray2->SetNumberOfTuples(DIM);
>>
>>    int t;
>>    for (t = 0; t < DIM; t++)
>>    {
>>        float x = t;
>>        float y = vtkMath::Random(0.0f,1.0f);
>>        dataArray1->SetTuple(t, &x);
>>        dataArray2->SetTuple(t, &y);
>>    }
>>
>>    vtkFieldData *fieldData = vtkFieldData::New();
>>    fieldData->AllocateArrays(2);
>>    fieldData->AddArray(dataArray1);
>>    fieldData->AddArray(dataArray2);
>>
>>    vtkDataObject *dataObject = vtkDataObject::New();
>>    dataObject->SetFieldData(fieldData);
>>
>>    vtkXYPlotActor *plot = vtkXYPlotActor::New();
>>    plot->AddDataObjectInput(dataObject);
>>    plot->SetTitle("Plot");
>>    plot->SetXTitle("X-Axis");
>>    plot->SetYTitle("Y-Axis");
>>    plot->SetXValuesToValue();
>>    plot->SetWidth(0.9);
>>    plot->SetHeight(0.9);
>>    plot->SetPosition(0.05, 0.05);
>>    plot->LegendOn();
>>    plot->PickableOff();
>>    plot->PlotCurvePointsOn();
>>    plot->PlotCurveLinesOff();
>>
>>    plot->SetDataObjectXComponent(0, 0);
>>    plot->SetDataObjectYComponent(0, 1);
>>    plot->SetPlotColor(0, 1.0, 0.0, 0.0);
>>    plot->SetPlotLabel(0, "My Label");
>>    //plot->GetProperty()->SetColor(0.0, 0.0, 0.0);
>>
>>    vtkRenderer *renderer = vtkRenderer::New();
>>    renderer->SetBackground(0, 0, 0);
>>    renderer->AddActor2D(plot);
>>
>>    vtkRenderWindow *renderWindow = vtkRenderWindow::New();
>>    renderWindow->SetSize(550, 450);
>>    renderWindow->AddRenderer(renderer);
>> //    vtkRenderWindowInteractor* inter = QVTKInteractor::New();
>> //    renderWindow->SetInteractor(inter);
>>    view->SetRenderWindow(renderWindow);
>>
>> //end-snippet//
>> ------------------------------------------------------------------------
>>
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