[vtkusers] Problem QVTKWidget using vtkCarbonRenderWindow instead of vtkCocoaRenderWindow

[Elvis Dowson]

Hi Mike,
                    There is an alpha release of Qt-4.5 on the troll  
tech website. Here is the link: http://trolltech.com/company/newsroom/announcements/press.2008-06-09.7117549806/?searchterm=Qt%204.5

Could you guide me on what I should do to modify vtk to support Qt-4.5  
using Cocoa? I'm basically trying to get the QVTK plugin to compile  
correctly and use the Cocoa framework.

Best regards,

Elvis Dowson


On Sep 23, 2008, at 5:36 PM, Mike Jackson wrote:

> Qt 4.5 will be based on Cocoa (That is the current news from TT). Qt  
> 4.4 is CARBON based so you will have to build VTK using Carbon=ON if  
> you want to use Qt. As far as supporting Cocoa/Qt in the future I am  
> not sure if anyone has really looked at it yet. _IF_ TrollTech does  
> deliver Qt/Cocoa for Qt 4.5 then the test is pretty simple. If the  
> Qt Version is less than 4.5 then use Carbon. If it is 4.5 or above  
> use Cocoa. This can be detected in CMake and set accordingly.
>
> Q_WS_MAC is defined by Qt in its header files.
>
>
> _________________________________________________
> | Mike Jackson - Principal Software Engineer      |
> | BlueQuartz Software                             |
> | mike.jackson at bluequartz.net                     |
> | www.bluequartz.net                              |
> ---------------------------------------------------
>
> On Sep 23, 2008, at 9:27 AM, Elvis Dowson wrote:
>
>> Hi,
>>        I just downloaded the latest vtk-5.x sources from cvs  
>> (vtk-5.3) and tried to compile shared libraries, with
>>
>> Problem Outline
>>
>> VTK_USE_CARBON=OFF
>> VTK_USE_COCOA=ON
>> VTK_GUI_SUPPORT=ON
>> VTK_USE_QVTK=ON
>> DESIRED_QT_VERSION=4
>>
>> I am using qt-4.4.2 for mac os, which has support for Cocoa.
>>
>> Somehow, even through I have disabled support for Carbon, this  
>> error comes up.
>>
>>  "vtkCarbonRenderWindow::UpdateGLRegion()", referenced from:
>>      QVTKWidget::DirtyRegionProcessor(OpaqueEventHandlerCallRef*,  
>> OpaqueEventRef*, void*)   in libQVTK.a(QVTKWidget.o)
>>
>> If I look at the file GUISupport/Qt/CMakeLists.cxx (what is this  
>> file used for BTW?)
>>
>> I see the following implementation. Shouldn't it use  
>> vtkCocoaRenderWindow instead?
>>
>> #if defined (Q_WS_MAC) && QT_VERSION >= 0x040000
>> OSStatus QVTKWidget::DirtyRegionProcessor(EventHandlerCallRef,  
>> EventRef event, void* wid)
>> {
>>  QVTKWidget* widget = reinterpret_cast<QVTKWidget*>(wid);
>>  UInt32 event_kind = GetEventKind(event);
>>  UInt32 event_class = GetEventClass(event);
>>  if(event_class == 'cute' && event_kind == 20)
>>    {
>>    static_cast<vtkCarbonRenderWindow*>(widget->GetRenderWindow())- 
>> >UpdateGLRegion();
>>    }
>>  return eventNotHandledErr;
>> }
>>
>> #endif
>>
>>
>> If I look at the file QVTKWidget.h
>>
>> there is no implementation for the case when qt version >= 4 and  
>> the user selects the Cocoa libraries.
>>
>> #if defined(Q_WS_MAC) && QT_VERSION >= 0x040000
>> #include <Carbon/Carbon.h>    // Event handling for dirty region
>> #endif
>>
>> How can I go about trying to fix this?
>>
>> Where is Q_WS_MAC defined?
>>
>> General Question
>>
>> What should I do to make the modifications to support Cocoa for QVTK?
>>
>>
>> Best regards,
>>
>> Elvis Dowson
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>