Slicer3:Developers:Projects:QtSlicer/Tutorials/CompileWithQt

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QtSlicer/Tutorials←

Building Slicer with Qt

1 Build Qt

Download and install Qt. As of winter 2009, get the 4.6 version.

  • Linux/Mac - install full QtCreator package (use "-arch x86_64" for a 64 bit build on snowleopard)
cd Slicer3-lib
mkdir Qt
mkdir Qt-build
cd Qt
wget http://get.qt.nokia.com/qt/source/qt-everywhere-opensource-src-4.6.0.tar.gz
tar xvfz qt-everywhere-opensource-src-4.6.0.tar.gz
cd qt-everywhere-opensource-src-4.6.0
echo yes | ./configure -prefix ../../Qt-build -debug-and-release -opensource  -no-qt3support 
make -j 16
make install

On a 64 bit system, you may have to add -arch x86_64 to the Qt configure (?)

  • Windows - need to get source code. On the LGPL tab, select the source code download page for windows and visual studio 2008, and note that there is a link below where you can download the source code in a zip archive (use a windows extracter, don't use cygwin unzip it).
    • launch the msvc2008 command prompt (MSVC08 Tools->Visual Studio 2008 CommandPrompt)
    • build with configure.exe -platform win32-msvc2008
      • Note: if you are compiling Slicer in Debug mode, please add the -debug argument to the command line above to generate a compatible build; Release is the default.
        • Using the Qt Designer on Windows requires that the Slicer widget plugins are compiled in the same mode than Qt. If Qt is compiled in Release mode (default), Slicer would have to be compiled in Release. However if Qt is compiled in Debug mode only, Slicer must be compiled in Debug. (and if Qt is in "Release and Debug", Slicer must be compiled in Release). So for developers, the Debug mode is recommended.
      • According to [1] Qt does not support msvc2008 on windows xp. However, running configure.exe with no -platform argument seems to work. If you run configure with the -platform argument first by mistake, and if configure -clean doesn't work, then you may need to start from a fresh extraction from the .zip archive before running configure again with no -platform, unless you can run nmake with the config clean target.
    • run vcvars32.bat first
    • and then nmake.
    • building with webkit support requires that src/3rdparty/webkit/WebCore/tmp/moc/{debug,release}_shared/mocinclude.tmp be removed. else you will get linker errors like QNetworkReplyHandler.obj : error LNK2001: unresolved external symbol "public: virtual struct QMetaObject const * __thiscall WebCore::FormDataIODevice::metaObject(void)const (?metaObject@FormDataIODevice@WebCore@@UBEPBUQMetaObject@@XZ)
    • If you encounter the following error api\qscriptextensionplugin.h(43): Error: Undefined interface,, delete the files \src\script\tmp\moc\debug_shared\mocinclude.tmp and \src\script\tmp\moc\release_shared\mocinclude.tmp and restart nmake. For more info, please see QTBug 6470].

2 Build Slicer without Qt first

Do a standard build of Slicer and then we will convert it to use Qt

3 Build VTK with Qt enabled

cd ../../VTK-build
../CMake-build/bin/ccmake .
Press 't' to enter advanced mode.
VTK_USE_QT to ON
Press 'c' to configure.
DESIRED_QT_VERSION to 4
QT_QMAKE_EXECUTABLE to {path to}/Slicer3-lib/Qt-build/bin/qmake
VTK_USE_QVTK_QTOPENGL to ON (advanced option)
Press 'c' to configure.
Press 'g' to generate
make -j16
  • issues
    • if you encounter compilation errors like undefined reference to `QMapData::createData(int)', delete the entire build directory (VTK-build) and start a build from scratch (you can use the same CMakeCache.txt) Make sure there is not a different Qt version in the PATH/LD_LIBRARY_PATH environment variables (ie Qt-4.6.0 while you try to compile VTK with 4.6.2).

4 Download and build CTK

Preconditions

Git must be installed on your machine

Download CTK

cd /home/julien/work/Slicer3-lib/
it clone git://github.com/pieper/CTK.git CTK

Build CTK

mkdir CTK-build
cd CTK-build
ccmake ../CTK
make -j16

5 Build Slicer with Qt enabled.

  • Turn ON the option Slicer3_USE_QT
    • Make sure QT_QMAKE_EXECUTABLE points to the qmake binary path (i.e. D:/work/Slicer3-lib/Qt-build/bin/qmake)
Slicer3_USE_QT
  • Add the variable CTK_DIR:Path and make it points to the CTK build directory
    • Using cmake-gui, click "Add Entry"
Variable CTK_DIR
    • Using ccmake, run ccmake -DCTK_DIR:PATH=/home/julien/work/Slicer3-lib/CTK-build
cd ../../Slicer3-build
../Slicer3-lib/CMake-build/bin/ccmake -DCTK_DIR:PATH=/home/julien/work/Slicer3-lib/CTK-build .

Turn Slicer3_USE_QT ON Press 'c' to configure Set QT_QMAKE_EXECUTABLE to {path to}/home/julien/work/Slicer3-lib/Qt-build/bin/qmake Press 'c' to configure and then press 'g' to generate. 

make -j16

Useful links for Qt

Troubleshooting

  • Refresh problems of Qt widgets under linux
    • Solution: turn Compiz off (System/Preferences/Appearance/Visual Effects)
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