[vtkusers] System throw exceptions while interactoring window with mouse by vtkInteractorStyleImage using ActiViz.NET
Liu_tj
tjlp at netease.com
Sat Mar 12 12:17:50 EST 2016
Hi, David,
Continue this thread. Now I upgrade from Activiz for VTK 5.8 to 7.0. And I define the vtkInteractorStyleImage::MouseWheelForwardEvt and MouseWheelBackwardEvt for slice switch. With VTK 5.8, it works but now it doesn't work for 7.0. With VTK 7.0, these 2 event handlers keep the old behavior which zooms in or out. It does not call the function I define to switch the slice number. My code is as follow:
private void Display(vtkRenderWindow aRenderWindow, vtkAlgorithmOutput aData)
{
if (aData == null)
return;
m_imageViewer = vtkImageViewer2.New();
m_imageViewer.SetInputConnection(aData);
switch (m_sliceDirection)
{
case Direction.AXIAL:
m_imageViewer.SetSliceOrientationToXY();
break;
case Direction.CORONAL:
m_imageViewer.SetSliceOrientationToYZ();
break;
case Direction.SAGITTAL:
m_imageViewer.SetSliceOrientationToXZ();
break;
default:
break;
}
m_imageViewer.GetSliceRange(ref m_minSliceNumber, ref m_maxSliceNumber);
m_interactorStyle = vtkInteractorStyleImage.New();
m_moveforward = new vtkObject.vtkObjectEventHandler(interactor_MouseWheelForwardEvt);
m_movebackward = new vtkObject.vtkObjectEventHandler(interactor_MouseWheelBackwardEvt);
m_interactorStyle.MouseWheelForwardEvt += m_moveforward;
m_interactorStyle.MouseWheelBackwardEvt += m_movebackward;
vtkObject.vtkObjectEventHandler(interactor_MouseWheelBackwardEvt);
aRenderWindow.GetRenderers().InitTraversal();
m_renderer = aRenderWindow.GetRenderers().GetFirstRenderer();
m_renderer.SetBackground(0.0, 0.0, 0.0);
m_imageViewer.SetRenderWindow(aRenderWindow);
vtkRenderWindowInteractor interactor = aRenderWindow.GetInteractor();
interactor.SetInteractorStyle(m_interactorStyle);
m_imageViewer.SetupInteractor(interactor);
m_currentSlice = m_minSliceNumber + (m_maxSliceNumber - m_minSliceNumber) / 2;
m_imageViewer.SetSlice(m_currentSlice);
m_imageViewer.Render();
}
Thanks
Liu Peng
在2016-02-28，"David Cole" <DLRdave at aol.com> 写道： -----原始邮件-----
发件人:"David Cole" <DLRdave at aol.com>
发送时间:2016年02月28日 星期日
收件人:"Liu_tj" <tjlp at netease.com>
抄送:"vtkusers" <vtkusers at vtk.org>
主题:Re: [vtkusers] System throw exceptions while interactoring window with mouse by vtkInteractorStyleImage using ActiViz.NET
Rather than doing += new and directly adding an event handler, save a pointer to the return value of new in each case as a C# member variable (which has scope at least as long as you want to be receiving the events...), and then do += with that variable.
That will keep a C# reference to it so it won't be garbage collected.
That will help, although I didn't analyze your whole code snippet thoroughly, so there may be more to do after that. But that should be your first step.
HTH,
David C.
> On Feb 28, 2016, at 3:17 AM, Liu_tj <tjlp at netease.com> wrote:
>
> Hi, VTK guys,
>
> At present I am ActiViz.NET 5.8.0 OpenSource Edition (x86) and Visual Studio 2015 C# to define a WPF user control for display DICOM series. I created event handlers for vtkInteractorStyleImage to handle mouse wheel forwared and mouse backward to switch the DICOM image. The application can display the image, when I forward or backward the mouse wheel, I get the system exception:
>
> Unhandled Exception: System.Exception: error: could not get registered type - mteIndex='4294967295' classNameKey=''
>
> I read the thread http://vtk.1045678.n5.nabble.com/ActiViz-NET-reports-unhandled-Exception-while-interacting-window-with-Mouse-td5720046.html, but I have no idea how to fix it.
>
> Any glue for this issue?
>
> Below is my user control class:
>
> public partial class Dicom2DViewer : UserControl
> {
> public Dicom2DViewer()
> {
> InitializeComponent();
> m_renderwinctrl = this.FindName("renderCtrl") as RenderWindowControl;
> if (m_renderwinctrl != null)
> m_renderWindow = m_renderwinctrl.RenderWindow;
>
> //m_imagePlaneWidget = vtkImagePlaneWidget.New();
> //m_imagePlaneWidgetFor3D = vtkImagePlaneWidget.New();
> }
>
> public static readonly DependencyProperty DICOMDataProperty =
> DependencyProperty.Register("DICOMData", typeof(vtkAlgorithmOutput),
> typeof(Dicom2DViewer), new FrameworkPropertyMetadata(null, OnDICOMDataPropertyChanged));
>
> public vtkAlgorithmOutput DICOMData
> {
> get { return (vtkAlgorithmOutput)GetValue(DICOMDataProperty); }
> set { SetValue(DICOMDataProperty, value); }
> }
>
> private static void OnDICOMDataPropertyChanged(DependencyObject source, DependencyPropertyChangedEventArgs e)
> {
> Dicom2DViewer dicomViewer = source as Dicom2DViewer;
> RenderWindowControl renderWindowCtrl = dicomViewer.renderCtrl;
> vtkAlgorithmOutput vtkDICOMOutput = (vtkAlgorithmOutput)e.NewValue;
>
> dicomViewer.Display(renderWindowCtrl.RenderWindow, vtkDICOMOutput);
> }
>
> private void Display(vtkRenderWindow aRenderWindow, vtkAlgorithmOutput aData)
> {
> if (aData == null)
> return;
>
> m_imageViewer = vtkImageViewer2.New();
> m_imageViewer.SetInputConnection(aData);
> m_imageViewer.GetSliceRange(ref m_minSliceNumber, ref m_maxSliceNumber);
>
> //vtkInteractorStyleImage interactorStyle = vtkInteractorStyleImage.New();
> //interactorStyle.MouseWheelForwardEvt += new vtkObject.vtkObjectEventHandler(interactor_MouseWheelForwardEvt);
> //interactorStyle.MouseWheelBackwardEvt += new vtkObject.vtkObjectEventHandler(interactor_MouseWheelBackwardEvt);
>
> //aRenderWindow.GetInteractor().SetInteractorStyle(interactorStyle);
> vtkInteractorStyleImage m_interactorStyle = vtkInteractorStyleImage.New();
> m_interactorStyle.MouseWheelForwardEvt += new vtkObject.vtkObjectEventHandler(interactor_MouseWheelForwardEvt);
> m_interactorStyle.MouseWheelBackwardEvt += new vtkObject.vtkObjectEventHandler(interactor_MouseWheelBackwardEvt);
>
> aRenderWindow.GetInteractor().SetInteractorStyle(m_interactorStyle);
> aRenderWindow.GetRenderers().InitTraversal();
>
> vtkRenderer ren;
> while ((ren = aRenderWindow.GetRenderers().GetNextItem()) != null)
> ren.SetBackground(0.0, 0.0, 0.0);
>
> m_imageViewer.SetRenderWindow(aRenderWindow);
> m_imageViewer.SetSlice(m_minSliceNumber);
>
> switch (m_sliceDirection)
> {
> case Direction.AXIAL:
> m_imageViewer.SetSliceOrientationToXY();
> break;
> case Direction.CORONAL:
> m_imageViewer.SetSliceOrientationToYZ();
> break;
> case Direction.SAGITTAL:
> m_imageViewer.SetSliceOrientationToXZ();
> break;
> default:
> break;
> }
>
> m_imageViewer.Render();
> }
>
> private void interactor_MouseWheelForwardEvt(vtkObject sender, vtkObjectEventArgs e)
> {
> MoveSlice(1);
> }
>
> void interactor_MouseWheelBackwardEvt(vtkObject sender, vtkObjectEventArgs e)
> {
> MoveSlice(0);
> }
>
> private void MoveSlice(int direction) //0: move backward; 1: move forward
> {
> if (direction == 0)
> {
> if (m_currentSlice > m_minSliceNumber)
> {
> m_currentSlice -= 1;
> m_imageViewer.SetSlice(m_currentSlice);
> m_imageViewer.Render();
> }
> }
> else
> {
> if (m_currentSlice < m_maxSliceNumber)
> {
> m_currentSlice += 1;
> m_imageViewer.SetSlice(m_currentSlice);
> m_imageViewer.Render();
> }
> }
> }
>
> public vtkRenderWindow GetRenderWindow()
> {
> return m_renderWindow;
> }
>
> public void AddRenderer(vtkRenderer renderer)
> {
> m_renderWindow.AddRenderer(renderer);
> }
>
> public void SetViewDirection(Direction direction)
> {
> m_sliceDirection = direction;
> }
>
> private RenderWindowControl m_renderwinctrl = null;
> private vtkRenderWindow m_renderWindow = null;
> private vtkImageViewer2 m_imageViewer = null;
> vtkInteractorStyleImage m_interactorStyle = null;
> private Direction m_sliceDirection;
>
> int m_currentSlice = 0;
> int m_minSliceNumber = 0;
> int m_maxSliceNumber = 0;
> }
>
> Thanks
> Liu Peng
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> http://public.kitware.com/mailman/listinfo/vtkusers
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/vtkusers/attachments/20160313/6b47ac08/attachment.html>
More information about the vtkusers
mailing list