thliebig / qcsxcad Goto Github PK

QCSXCAD uses RenderingFreeTypeOpenGL, but

Note that the deprecated RenderingFreeTypeOpenGL module has been removed, as the functionality of this module has been replaced by the vtkTextRenderer and vtkTextMapper classes.

See http://www.kitware.com/blog/home/post/963

/disk-samsung/freebsd-ports/cad/qcsxcad/work/QCSXCAD-0.6.2-5-g0dabbaf/export_x3d.cpp:20:10: fatal error: 'QVTKWidget.h' file not found
#include <QVTKWidget.h>
         ^~~~~~~~~~~~~~
1 error generated.

vtk-9.0.3 doesn't install QVTKWidget.h.

QCSXCAD is currently incompatible with Qt6, both in the build system and in the source code. A Qt6 port is needed as more and more systems will deprecate Qt6 in the following years. Because we're using VTK, it would happen at a much faster path before Qt5 itself is deprecated, since VTK is built with either Qt5 or Qt6. A Qt6 VTK build makes the QCSXCAD Qt6 port necessary.

The first deprecation has already occurred on macOS Homebrew as reported here (thliebig/openEMS-Project#108 (reply in thread)) by @valgamaa. In Homebrew, VTK is now built with Qt6, all Qt5 builds have already been disabled. Right now it's already impossible to install openEMS with Homebrew.

I already have an experimental CMake Qt6 port in my private repo, but some source code changes are also needed. I'll give it a try on my spare time.

There is a a problem in Enterprise Linux 8 where VTK-QT is available as version 9, but OS only has QT 5 installed.additionally, forsome reason it does not detect the QT version.

While this is not production ready, it does allow cmake to complete and build successfully. I set version 4.5 even though it is using VTK-QT version 9, which triggers a build against qt5. There must be a better way to do this but I do not know what it is:

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 73329ec..05bae99 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -110,6 +110,8 @@ else()
 endif()
 
 message(STATUS "Found package VTK. Using version " ${VTK_VERSION})
+message(STATUS "Found package VTK QT. Using version " ${VTK_QT_VERSION})
+SET(VTK_QT_VERSION 4.5)
 INCLUDE_DIRECTORIES (${VTK_INCLUDE_DIRS})
 
 # Qt