[vtkusers] cmake error: no qvtkwidget.h is found

[Clinton Stimpson]

Yifei Li wrote:
> Hi all,
>
> I just made some progress.  But I got a new problem - a linking error:
>
> CMakeFiles/editor.dir/editorwindow.o: In function 
> `Ui_MainWindow::setupUi(QMainWindow*)':
> editorwindow.cpp:(.text._ZN13Ui_MainWindow7setupUiEP11QMainWindow[Ui_MainWindow::setupUi(QMainWindow*)]+0x492): 
> undefined reference to `QVTKWidget::QVTKWidget(QWidget*, 
> QFlags<Qt::WindowType>)'
So I'm assuming you're using a VTK installation created by your Linux 
distribution?  Some of the distros build QVTK with Qt3, so you can't use 
it with Qt4.
Maybe that's your problem.  Look for the VTKConfigQt.cmake file and see 
if it sets DESIRED_QT_VERSION=3.
>
> I fixed the previous problem by changing the name of the include 
> header 'qvtkwidget.h' (included in ui_editor.h)  to 'QVTKWidget.h"
You should fix it in your .ui file (with text editor or qt designer).  
The ui_editor.h is created from the .ui file.
When you promote widgets in the designer, and type in the class name, it 
auto completes a header file for that class name - but its all 
lowercase.  Its easiest to fix then.

Clint
>
> However, the 'ui_editor.h' is automatically genereated after typing 
> 'make'.  So is this a bug of cmake??   On the same machine where I 
> successfully built SimpleView,  I did not have this problem.
>
> My computer is running Fedora 9 and cmake version is 2.4.
>
> Any ideas?
>
> Yifei
>
> Yifei Li wrote:
>> Brian,
>>
>> I can build that example without problem. And I did learn a lot from 
>> its CMakeLists.txt
>>
>> Now I  want to  write my own CMakeLists.txt from scratch ( trying to 
>> get rid of those stuff that provides Qt3 compatbility in SimpleView)  
>> and have troubles. Here is my CMakeLists.txt.  Using 'make verbose=1' 
>> did show '-I/usr/include/vtk'.
>>
>> Any help is highly apprecaited.
>>
>> Yifei
>>
>> PROJECT( editor )
>>
>> SET( SAMPLE_SRCS
>>    main.cpp
>>    editorwindow.cpp
>> )
>>
>> SET( SAMPLE_MOC_HDRS
>>    editorwindow.h
>> )
>>
>> SET( SAMPLE_UIS
>>    editor.ui
>> )
>>
>>
>> FIND_PACKAGE( Qt4 REQUIRED )
>> FIND_PACKAGE( VTK )
>>
>> INCLUDE( ${QT_USE_FILE} )
>> INCLUDE( ${VTK_USE_FILE} )
>>
>> QT4_WRAP_UI( SAMPLE_UI_HDRS ${SAMPLE_UIS} )
>>
>> QT4_WRAP_CPP( SAMPLE_MOC_SRCS ${SAMPLE_MOC_HDRS} )
>>
>> INCLUDE_DIRECTORIES( ${QT_INCLUDE_DIR} ${CMAKE_BINARY_DIR} )
>>
>> ADD_EXECUTABLE( editor ${SAMPLE_SRCS} ${SAMPLE_MOC_SRCS} 
>> ${SAMPLE_UI_HDRS} )
>>
>> TARGET_LINK_LIBRARIES( editor QVTK ${QT_LIBRARIES} )
>> Wylie, Brian wrote:
>>> Yifei,
>>>
>>> There's a 'SimpleView' example in VTK\Examples\GUI\Qt\SimpleView 
>>> that builds a small Qt/VTK application. You might look at it's 
>>> CMakeLists.txt file for guidance.
>>> Also, looking through the generated Makefile (or windows project 
>>> file), may give you some clues.
>>>   Brian Wylie - Org 1424
>>>   Sandia National Laboratories
>>>   MS 1323 - Building CSRI/242
>>>   (505)844-2238 FAX(505)284-2518          _______ __
>>>       /_  __(_) /_____ _____
>>>        / / / / __/ __ `/ __ \
>>>       / / / / /_/ /_/ / / / /
>>>      /_/ /_/\__/\__,_/_/ /_/
>>>             Informatics Toolkit
>>>
>>> -----Original Message-----
>>> From: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] On 
>>> Behalf Of Yifei Li
>>> Sent: Monday, March 30, 2009 8:30 AM
>>> To: vtkusers at vtk.org
>>> Subject: [vtkusers] cmake error: no qvtkwidget.h is found
>>>
>>> Hi,
>>>
>>> I'm still in the processing of learning cmake. Now I'm tring to 
>>> compile a very simple Qt/VTK program where a QVTKWidget is the only 
>>> widget in a QMainWindow. However, after typing make, I got the 
>>> following errors. (I did install 'vtk-qt-5.0.4-21.fc9.i386' and 
>>> QVTKWidget.h is in /usr/include/vtk)
>>>
>>> In file included from mainwindow/editorwindow.h:2, from 
>>> mainwindow/main.cpp:1:
>>> mainwindow/ui_editor.h:23:24: error: qvtkwidget.h: No such file or 
>>> directory In file included from mainwindow/editorwindow.h:2, from 
>>> mainwindow/main.cpp:1:
>>> mainwindow/ui_editor.h:31: error: ISO C++ forbids declaration of 
>>> 'QVTKWidget' with no type
>>> mainwindow/ui_editor.h:31: error: expected ';' before '*' token
>>> mainwindow/ui_editor.h: In member function 'void
>>> Ui_MainWindow::setupUi(QMainWindow*)':
>>> mainwindow/ui_editor.h:50: error: 'vtkwidget' was not declared in 
>>> this scope
>>> mainwindow/ui_editor.h:50: error: expected type-specifier before 
>>> 'QVTKWidget'
>>> mainwindow/ui_editor.h:50: error: expected `;' before 'QVTKWidget'
>>>
>>> I attached the CMakeLists.txt and my source code. Could anyone give 
>>> me some help? Thanks
>>>
>>> Yifei
>>>
>>>   
>>
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