[vtkusers] QVTKWidget paintEvent

[Clinton Stimpson]

On Friday, September 24, 2010 12:03:21 pm Leonardo M. Ramé wrote:
> On 2010-09-24 09:28:24 -0600, Clinton Stimpson wrote:
> > On Friday, September 24, 2010 09:10:30 am Leonardo M. Ramé wrote:
> > > On 2010-09-24 08:45:31 -0600, Clinton Stimpson wrote:
> > > > On Friday, September 24, 2010 07:52:48 am Leonardo M. Ramé wrote:
> > > > > Hi, can paint over a QVTKWidget, however my drawings are lost when
> > > > > I click on the widget or after setting a vtkImageViewer2 into it.
> > > > > 
> > > > > This is the code I use to paint over the QVTKWidget:
> > > > > 
> > > > > QPaintEngine * myWidget::paintEngine() const
> > > > > {
> > > > > 
> > > > >   return QWidget::paintEngine();
> > > > > 
> > > > > }
> > > > > 
> > > > > void myWidget::paintEvent(QPaintEvent * e)
> > > > > {
> > > > > 
> > > > >   QVTKWidget::paintEvent(e);
> > > > >   QPainter paint(this);
> > > > >   paint.setPen(Qt::white);
> > > > >   paint.drawRect(5,5,10,10);
> > > > > 
> > > > > }
> > > > > 
> > > > > How can I let my drawings repaint over the image viewer
> > > > 
> > > > If you want to use QPainter, you'll have to use the new QVTKWidget2
> > > > in the git repository.  Otherwise, you'll have to use VTK classes to
> > > > do that drawing.
> > > > 
> > > > Clint
> > > 
> > > Thanks Clint. Do you know if the QVTKWidget2 support rendering
> > > vtkImageViewer2?.
> > 
> > It should work.
> > 
> > Clint
> 
> Sorry, but it doesn't.
> 
> I replaced the directory GUISupport/Qt from 5.6.0 with the one from git,
> and I got many errors like this:
> 
> VTK/GUISupport/Qt/QVTKGraphicsItem.h:36: error: forward declaration of
> ‘struct vtkGenericOpenGLRenderWindow’

Well, that's not going to work.  ;)

> 
> Do I have to download all vtk files from git repository to compile the
> new QVTKWidget2 ?

You'll have to figure out what you need if you want to backport or copy the 
code, and it does depend on other source files in VTK that are new.

Clint