[vtkusers] QVTK issue with vtkImageViewer2

[Ashish Singh]

Hi Clint,

Thanks for replying. I did the modifications you suggested. But the problem
still exists. I can load the data first time. But after I unload this data
and try to browse and load a new dataset, I don't see anything in the
QVTKwidget. What might be going wrong here?

Thanks,
Ashish

On Fri, Nov 20, 2009 at 12:53 PM, Clinton Stimpson <clinton at elemtech.com>wrote:

>
> A quick glance at the code shows you're not hooking up the QVTKWIdget with
> the
> vtkImageViewer2 correctly.
>
> One way to do it:
> vtkwidget = new QVTKWidget(centralwidget);
> imgview->SetupInteractor(vtkwidget->GetInteractor());
> imgview->SetRenderWindow(vtkwidget->GetRenderWindow());
>
> Clint
>
> On Friday 20 November 2009 11:21:27 am Ashish Singh wrote:
> > any suggestions on this?
> >
> > ---------- Forwarded message ----------
> > From: Ashish Singh <asinghmlists at gmail.com>
> > Date: Thu, Nov 19, 2009 at 10:59 AM
> > Subject: QVTK issue with vtkImageViewer2
> > To: vtkusers at vtk.org
> >
> >
> > Hi,
> >
> > I am trying to display each slice from a series of CT scans in a
> > QVTKwidget. The QVTKWidget itself is in a QMainWindow with 3 other
> widgets
> > to browse, load and unload the data. I want to be able to display the
> data
> > in QVTKwidget as soon as I hit the load button. I also want to be able to
> > unload the data and clear the QVTKwidget as soon as I hit the unload
> button
> > so that I can load a new dataset afterwards.
> >
> > I can read and display the data fine only the first time. I can also
> unload
> > the data, but after unload when I try to load new data it doesn't show up
> > in my QVTKwidget. Can anyone please tell me what am I missing or doing
> > wrong here and how to correct it?
> >
> > My development environment is:
> > Windows XP Pro x64
> > Visual Studio 2005
> > VTK 5.4.2
> > Qt 4.5.0
> >
> > Thanks,
> > Ashish
> >
> > Here's the code that I use:
> > ----Header file: test.h-----
> > #include <QObject>
> > #include <QPushButton>
> > #include <QLabel>
> > #include <QHBoxLayout>
> > #include <QVBoxLayout>
> > #include <QMainWindow>
> > #include <QVTKWidget.h>
> > #include <QWidget>
> > #include <QString>
> > #include <QFileDialog>
> > #include <QDir>
> > #include <qapplication.h>
> > #include <qobject.h>
> > #include <QtGui>
> >
> > #include <vtkDICOMImageReader.h>
> > #include <vtkImageViewer2.h>
> > #include <vtkRenderWindow.h>
> > #include "vtkRenderer.h"
> > #include "vtkCornerAnnotation.h"
> > #include "vtkImageData.h"
> >
> >
> > using namespace std;
> >
> > class test : public QObject
> > {
> >     Q_OBJECT
> >
> > public:
> >     string dirname;
> >     vtkDICOMImageReader *reader;
> >     vtkImageViewer2 *imgview;
> >     vtkImageData *blank;
> >
> >     QMainWindow *mymainwindow;
> >     QWidget *centralwidget;
> >     QLabel *mylabel;
> >     QPushButton *mypbutton;
> >     QPushButton *myloadbutton;
> >     QPushButton *myunloadbutton;
> >     QVTKWidget *vtkwidget;
> >     QHBoxLayout *myhlayout;
> >     QVBoxLayout *myvlayout;
> >     test(QObject* parent = 0);
> >     ~test();
> >
> >     public slots:
> >         void OnLoad();
> >         void OnBrowse();
> >         void OnUnLoad();
> >
> > };
> >
> > -----cpp file: test.cpp-------
> > #include "test.h"
> >
> > test::test(QObject * parent):QObject(parent)
> > {
> >     reader = vtkDICOMImageReader::New();
> >     imgview = vtkImageViewer2::New();
> >
> >     //create dummy data to create start up blank image
> >     blank = vtkImageData::New();
> >     blank->SetDimensions(10, 10, 1);
> >     blank->AllocateScalars();
> >     for (int i = 0; i < 10; i++)
> >         for (int j = 0; j < 10; j++)
> >             blank->SetScalarComponentFromDouble(i, j, 0, 0, 0);
> >     blank->Update();
> >     imgview->SetInput(blank);
> >     imgview->SetInput(blank);
> >     //create dummy data to create start up blank image
> >
> >     mymainwindow = new QMainWindow();
> >     centralwidget = new QWidget(mymainwindow);
> >
> >     mylabel = new QLabel(centralwidget);
> >     mypbutton = new QPushButton(centralwidget);
> >     myloadbutton = new QPushButton(centralwidget);
> >     myunloadbutton = new QPushButton(centralwidget);
> >
> >     vtkwidget = new QVTKWidget(centralwidget);
> >     vtkwidget->GetRenderWindow()->AddRenderer(imgview->GetRenderer());
> >     vtkwidget->setFixedSize(512,512);
> >
> >     myhlayout = new QHBoxLayout();
> >     myvlayout = new QVBoxLayout();
> >
> >     //setup UI
> >     mylabel->setText("Select Dicom Dir");
> >     mypbutton->setText("Browse");
> >     this->connect(this->mypbutton,SIGNAL(clicked()),this,
> > SLOT(OnBrowse()));
> >
> >     myloadbutton->setText("Load");
> >     this->connect(this->myloadbutton,SIGNAL(clicked()),this,
> > SLOT(OnLoad()));
> >
> >     myunloadbutton->setText("Unload");
> >
> >
> this->connect(this->myunloadbutton,SIGNAL(clicked()),this,SLOT(OnUnLoad()))
> >;
> >
> >     myhlayout->addWidget(mylabel);
> >     myhlayout->addWidget(mypbutton);
> >     myhlayout->addWidget(myloadbutton);
> >     myhlayout->addWidget(myunloadbutton);
> >
> >     myvlayout->addLayout(myhlayout);
> >     myvlayout->addWidget(vtkwidget);
> >
> >     centralwidget->setLayout(myvlayout);
> >     mymainwindow->setCentralWidget(centralwidget);
> >     mymainwindow->show();
> > }
> >
> > test::~test()
> > {
> >     reader->Delete();
> >     imgview->Delete();
> >     blank->Delete();
> > }
> >
> > void test::OnLoad()
> > {
> >     reader->SetDirectoryName(dirname.c_str());
> >     reader->Update();
> >     imgview->SetInput(reader->GetOutput());
> >     imgview->GetRenderer()->ResetCamera();
> >     vtkwidget->update();
> > }
> >
> > void test::OnUnLoad()
> > {
> >     imgview->GetRenderer()->RemoveAllViewProps();
> >     imgview->GetRenderer()->ResetCamera();
> >     vtkwidget->update();
> > }
> >
> > void test::OnBrowse()
> > {
> >     QString indirectory =
> > QFileDialog::getExistingDirectory(this->centralwidget,tr("Select Input
> > Directory"), QDir::currentPath());
> >     dirname = indirectory.toStdString();
> > }
> >
> > -----main.cpp---------
> > #include "test.h"
> > void main(int argc, char *argv[])
> > {
> >     QApplication app(argc, argv);
> >     test *mywin = new test;
> >     app.exec();
> >
> > }
>
>
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