remove occurrences of Qt5

.gitignore

@@ -178,12 +178,6 @@ GraphicsView/demo/Triangulation_2/Makefile
 GraphicsView/demo/Triangulation_2/Regular_triangulation_2
 GraphicsView/demo/Triangulation_2/qrc_*.cxx
 GraphicsView/demo/Triangulation_2/ui_*.h
-GraphicsView/src/CGAL_Qt5/*.dll
-GraphicsView/src/CGAL_Qt5/*.lib
-GraphicsView/src/CGAL_Qt5/*.so
-GraphicsView/src/CGAL_Qt5/Makefile
-GraphicsView/src/CGAL_Qt5/moc_*.cxx
-GraphicsView/src/CGAL_Qt5/qrc_*.cxx
 HalfedgeDS/test/HalfedgeDS/cgal_test_with_cmake
 HalfedgeDS/test/HalfedgeDS/test_hds
 HalfedgeDS/test/HalfedgeDS/test_hds_decorator
@@ -879,7 +873,6 @@ Surface_mesher/demo/Surface_mesher/.*.deps
 Surface_mesher/demo/Surface_mesher/.qglviewer.xml
 Surface_mesher/demo/Surface_mesher/Makefile
 Surface_mesher/demo/Surface_mesher/Surface_mesher
-Surface_mesher/demo/Surface_mesher/Surface_mesher_Qt5_Demo
 Surface_mesher/demo/Surface_mesher/VTK/Makefile
 Surface_mesher/demo/Surface_mesher/VTK/mesh_a_3D_image
 Surface_mesher/demo/Surface_mesher/VTK/mesh_a_VTK_3D_image
@@ -894,7 +887,6 @@ Surface_mesher/demo/Surface_mesher/out*.off
 Surface_mesher/demo/Surface_mesher/polyhedron_remesher
 Surface_mesher/demo/Surface_mesher/polyhedron_remesher_with_edges
 Surface_mesher/demo/Surface_mesher/qrc_*.c*
-Surface_mesher/demo/Surface_mesher/qt5-demo
 Surface_mesher/demo/Surface_mesher/ui_*.h
 Surface_mesher/doxygen
 Surface_mesher/examples/Surface_mesher/.*.deps

Documentation/doc/Documentation/Developer_manual/cmakelist_script.txt

@@ -23,7 +23,7 @@ If the parameter is not given, the script creates <B>one executable for each giv
 source file</B>.
 <DT><B>`-c com1:com2:...`</B><DD> Lists components ("com1",
 "com2") of \cgal to which the executable(s) should be linked. Valid components are \cgal's
-libraries (i.e.\ "Core", "ImageIO", and "Qt5"). An example is `-c Core`.
+libraries (i.e.\ "Core", "ImageIO", and "Qt6"). An example is `-c Core`.
 
 <DT><B>`-b boost1:boost2:...`</B><DD> Lists components ("boost1",
 "boost2") of \boost to which the executable(s) should be

Documentation/doc/Documentation/Developer_manual/create_and_use_a_cmakelist.txt

@@ -25,8 +25,8 @@ the section \subpage thirdparty.
   - `-frounding-math` with gcc
   - `/fp:strict /fp:except-` with MSVC
 
-\section secexample Minimal Example Using Qt5
-This section describes a minimal example of a program that uses \cgal and Qt5 for some GUI features.
+\section secexample Minimal Example Using Qt6
+This section describes a minimal example of a program that uses \cgal and Qt6 for some GUI features.
 
 \subsection subcmake CMakeLists.txt
 \dontinclude Surface_mesh/CMakeLists.txt

Documentation/doc/Documentation/Third_party.txt

@@ -102,8 +102,8 @@ version shipped with \cgal.
 The page \ref configurationvariables lists CMake and environment variables which can be used to specify
 the location of third-party software during configuration.
 
-\subsection thirdpartyQt Qt5
-<b>Version 5.9.0 or later</b>
+\subsection thirdpartyQt Qt6
+<b>Version 6.4 or later</b>
 
 Qt is a cross-platform application and UI framework.
 

Documentation/doc/Documentation/Usage.txt

@@ -166,17 +166,17 @@ if no debugging is intended. Users should thus run:
     cd CGAL-\cgalReleaseNumber/examples/Triangulation_2
     cmake -DCGAL_DIR=$HOME/CGAL-\cgalReleaseNumber -DCMAKE_BUILD_TYPE=Release . # we are here using a release tarball
 
-The package Qt5 on brew is "keg-only", which means it is not "linked" with brew.
-In order to link against Qt5, you need to run:
+The package Qt6 on brew is "keg-only", which means it is not "linked" with brew.
+In order to link against Qt6, you need to run:
 
-    brew link qt@5
+    brew link qt@6
 
 After that, you will have to specify the Qt6_DIR by hand to cmake, using something like
 
     -DQt6_DIR=/usr/local/opt/qt6/lib/cmake/Qt6
 
 where `/usr/local/` is actually your current brew installation directory. Check this directory
-to be sure where the Qt5 is placed on your machine.
+to be sure where the Qt6 is placed on your machine.
 
 \subsection usage_configuring_cmake_gui Specifying Missing Dependencies
 

Documentation/doc/Documentation/advanced/Configuration_variables.txt

@@ -85,7 +85,7 @@ and will serverly limit performances.
 | Variable              | Description                                                           | Type        | %Default Value |
 | :-                    | :-                    | :-   |  :-            |
 | `CGAL_DIR`            | Full-path to the binary directory where \cgal was configured          |Either CMake or Environment | none |
-| `Qt5_DIR`             | Full-path to the Qt cmake directory  |CMake| platform-dependent|
+| `Qt6_DIR`             | Full-path to the Qt cmake directory  |CMake| platform-dependent|
 
 
 \subsection installation_variables_third_party Variables Providing Information About 3rd-Party Libraries
@@ -178,11 +178,11 @@ Under Linux, the \gmpxx is also searched for, and you may specify the following
 
 
 
-\subsection installation_qt5 Qt5 Library
+\subsection installation_qt6 Qt6 Library
 
-You must set the cmake or environment variable `Qt5_DIR` to point to the path
+You must set the cmake or environment variable `Qt6_DIR` to point to the path
 to the directory containing the file `Qt6Config.cmake` created by your \qt6 installation. If you are
-using the open source edition it should be `<path>/qt-everywhere-opensource-src-<version>/qtbase/lib/cmake/Qt5`.
+using the open source edition it should be `<path>/qt-everywhere-opensource-src-<version>/qtbase/lib/cmake/Qt6`.
 
 \subsection installation_leda LEDA Library
 

Documentation/doc/Documentation/windows.txt

@@ -118,7 +118,7 @@ CMake variables and paths. Otherwise, you can also install it using `vcpkg`:
 
 Remember to specify `--triplet` or the related environment variable in case you target 64-bit applications.
 
-As Qt5 is modular and as the \cgal examples and demos use only some of these modules
+As Qt6 is modular and as the \cgal examples and demos use only some of these modules
 you can save download and compilation time by specifying an *installation option*:
 
     C:\dev\vcpkg> .\vcpkg.exe install cgal[qt]
@@ -234,11 +234,10 @@ A typical `Qt` installation would consist of the following steps:
 <ul>
 <li>
 Download and install the Qt library for open source development package for your Visual Studio version at
-<a href="https://www.qt.io/download">https://www.qt.io/download</a>
-(here is the direct link to the <a href="https://www.qt.io/offline-installers">offline installers</a>).</li>
-<li>Add the environment variable `QTDIR` pointing to the place you installed Qt, e.g., `C:\dev\Qt\Qt5.13.1`,
+<a href="https://www.qt.io/download-open-source#source">https://www.qt.io/download-open-source#source</a>.</li>
+<li>Add the environment variable `QTDIR` pointing to the place you installed Qt, e.g., `C:\dev\Qt\Qt6.13.1`,
 as this will help `cmake` to find Qt.</li>
-<li>Add the bin directory of Qt, e.g. add  `C:\dev\Qt\Qt5.13.1\msvcXXXX_YY\bin` to `PATH`, where `XXXX_YY` is something like `vc2017_64`.
+<li>Add the bin directory of Qt, e.g. add  `C:\dev\Qt\Qt6.13.1\msvcXXXX_YY\bin` to `PATH`, where `XXXX_YY` is something like `vc2017_64`.
 To avoid any conflict with another dll with the same name from another folder, add this path as the first in the list.</li>
 </ul>
 

GraphicsView/demo/Segment_Delaunay_graph_Linf_2/Segment_voronoi_linf_2.cpp

@@ -522,7 +522,7 @@ int main(int argc, char **argv)
   app.setOrganizationName("GeometryFactory");
   app.setApplicationName("Segment Voronoi 2 demo");
 
-  // Import resources from libCGAL (Qt5)
+  // Import resources from libCGAL (Qt6)
   CGAL_QT_INIT_RESOURCES;
 
   if (argc == 2) {

GraphicsView/include/CGAL/export/Qt.h

@@ -16,9 +16,9 @@
 #include <CGAL/export/helpers.h>
 
 #if ( defined(CGAL_BUILD_SHARED_LIBS) && ( ! defined(CGAL_HEADER_ONLY) ) ) \
-  || defined(CGAL_USE_Qt5_RESOURCES)
+  || defined(CGAL_USE_Qt6_RESOURCES)
 
-#  if defined(CGAL_Qt6_EXPORTS) || defined(CGAL_USE_Qt5_RESOURCES)
+#  if defined(CGAL_Qt6_EXPORTS) || defined(CGAL_USE_Qt6_RESOURCES)
 // defined by CMake or in cpp files of the dll
 
 #    define CGAL_QT_EXPORT CGAL_DLL_EXPORT

Installation/LICENSE

@@ -5,9 +5,8 @@ The CGAL software consists of several parts, each of which is licensed under
 an open source license. It is also possible to obtain commercial licenses
 from GeometryFactory (www.geometryfactory.com) for all or parts of CGAL.
 
-The source code of the CGAL library can be found in the directories
-"src/CGAL", "src/CGALQt", "src/CGALQt5" and "include/CGAL" (with the
-exception of "include/CGAL/CORE", "include/CGAL/OpenNL").
+The source code of the CGAL library can be found in the directory
+"include/CGAL" (with the exception of "include/CGAL/CORE", "include/CGAL/OpenNL").
 It is specified in each file of the CGAL library which
 license applies to it. This is either the GNU General Public License
 or the GNU Lesser General Public License (as published by the Free Software
@@ -26,9 +25,9 @@ Distributed along with CGAL (for the users' convenience), but not part of
 CGAL, are the following third-party libraries, available under their own
 licenses:
 
-- CORE, in the directories "include/CGAL/CORE" and "src/CGAL_Core", is
-  licensed under the LGPL (see LICENSE.LGPL).
-- ImageIO, in the directory "src/CGAL_ImageIO", is licensed under the LGPL
+- CORE, in the directory "include/CGAL/CORE" is licensed under the LGPL
+  (see LICENSE.LGPL).
+- ImageIO, in the directory "include/CGAL/ImageIO", is licensed under the LGPL
   (see LICENSE.LGPL).
 - OpenNL, in the directory "include/CGAL/OpenNL", is licensed under the LGPL
   (see LICENSE.LGPL).

Installation/cmake/modules/CGAL_enable_end_of_configuration_hook.cmake

@@ -103,7 +103,7 @@ disable this ${type}.\n\
   endif()
 endfunction()
 
-function(CGAL_hook_fix_ctest_depending_on_Qt5)
+function(CGAL_hook_fix_ctest_depending_on_Qt6)
   get_property(_targets DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY BUILDSYSTEM_TARGETS)
   foreach(_target ${_targets})
     if(NOT TEST "compilation of  ${_target}")
@@ -120,7 +120,7 @@ function(CGAL_hooks_at_end_of_all_directories)
   CGAL_hook_check_targets()
   CGAL_hook_check_unused_cpp_files()
   if(BUILD_TESTING)
-    CGAL_hook_fix_ctest_depending_on_Qt5()
+    CGAL_hook_fix_ctest_depending_on_Qt6()
   endif()
 endfunction()
 

Installation/include/CGAL/export/helpers.h

@@ -12,7 +12,7 @@
 #ifndef CGAL_EXPORT_HELPERS_H
 #define CGAL_EXPORT_HELPERS_H
 
-#if defined(CGAL_HEADER_ONLY) && ! defined(CGAL_USE_Qt5_RESOURCES)
+#if defined(CGAL_HEADER_ONLY) && ! defined(CGAL_USE_Qt6_RESOURCES)
 #  define CGAL_DLL_IMPORT
 #  define CGAL_DLL_EXPORT
 #  define CGAL_DLL_LOCAL

Installation/test/Installation/test_configuration_qt.cpp

@@ -26,7 +26,7 @@ int main(int argc, char**) {
   std::istream_iterator<Point> end;
   Triangulation t;
   t.insert(begin, end);
-  if(argc == 3) // do not test Qt5 at runtime
+  if(argc == 3) // do not test Qt6 at runtime
     CGAL::draw(t);
   std::cout<<"OK."<<std::endl;
   return EXIT_SUCCESS;

Linear_cell_complex/demo/Linear_cell_complex/Linear_cell_complex_3_demo.cpp

@@ -31,7 +31,7 @@ int main(int argc, char** argv)
   application.setOrganizationName("CNRS and LIRIS' Establishments");
   application.setApplicationName("3D Linear Cell Complex");
 
-  // Import resources from libCGALQt5
+  // Import resources from libCGALQt6
   // See https://doc.qt.io/qt-5/qdir.html#Q_INIT_RESOURCE
   CGAL_Qt_init_resources();// that function is in a DLL
   Q_INIT_RESOURCE(Linear_cell_complex_3);

Mesh_2/demo/Mesh_2/README.txt

@@ -1,5 +1,5 @@
 This directory contains non-graphical demos of the 2D Mesh Generator
 package.
-The Constrained Delaunay triangulation Qt5 demos has a 2D meshing feature that
+The Constrained Delaunay triangulation Qt demos has a 2D meshing feature that
 demonstrates the  2D Mesh Generator package. See in the directory
 demo/Triangulation_2/ of the CGAL tarball.

Polyline_simplification_2/demo/Polyline_simplification_2/Polyline_simplification_2.cpp

@@ -503,7 +503,7 @@ int main(int argc, char **argv)
   app.setOrganizationName("GeometryFactory");
   app.setApplicationName("Polyline_simplification_2 demo");
 
-  // Import resources from libCGALQt5.
+  // Import resources from libCGALQt6.
   CGAL_QT_INIT_RESOURCES;
 
   MainWindow mainWindow;

Surface_mesh_topology/test/Surface_mesh_topology/fundamental_group_of_the_torus.cpp

@@ -121,7 +121,7 @@ int main()
 /*
 #ifdef CGAL_USE_BASIC_VIEWER
   std::vector<Path_on_surface<SM> > paths={pij, pkl};
-  CGAL::draw(sm, paths); // Enable only if CGAL was compiled with Qt5
+  CGAL::draw(sm, paths); // Enable only if CGAL was compiled with Qt6
 #endif // CGAL_USE_BASIC_VIEWER
 */
   for (int i=-4; i<=4; ++i)

Testsuite/test/post_process_ctest_results.py

@@ -48,7 +48,7 @@
         elif name == "libCGAL_ImageIO":
           name="libCGALimageIO_shared"
         elif name == "libCGAL_Qt6":
-          name="libCGALQt5_shared"
+          name="libCGALQt6_shared"
         if name=="incomplete":
           is_writing=False
           is_ignored=False

Three/doc/Three/Three.txt

@@ -322,7 +322,7 @@ To create an external plugin, you must make a new Cmake project.\n
 
     project( Example_plugin )
 
-Configure CMake as you desire and fetch the right Qt5 packages :
+Configure CMake as you desire and fetch the right Qt6 packages :
 
     # Find includes in corresponding build directories
     set(CMAKE_INCLUDE_CURRENT_DIR ON)
@@ -331,13 +331,13 @@ Configure CMake as you desire and fetch the right Qt5 packages :
     cmake_minimum_required(VERSION 3.1...3.23)
 
     #Find CGAL
-    find_package(CGAL COMPONENTS Qt5)
+    find_package(CGAL COMPONENTS Qt6)
     include( ${CGAL_USE_FILE} )
-    # Find Qt5 itself
-    find_package(Qt5
+    # Find Qt6 itself
+    find_package(Qt6
                  QUIET
-                 COMPONENTS            OpenGL Script Svg Xml
-                 OPTIONAL_COMPONENTS   ScriptTools)
+                 COMPONENTS            OpenGLWidgets Svg
+                 OPTIONAL_COMPONENTS   WebSockets)
 
 You will probably have to fetch the libraries exported by the Polyhedron_demo, like the Scene_items.
 
@@ -370,15 +370,14 @@ Notice that an external plugin will not be automatically loaded in the Polyhedro
     cmake_minimum_required(VERSION 3.1...3.23)
 
     #Find CGAL
-    find_package(CGAL COMPONENTS Qt5)
+    find_package(CGAL COMPONENTS Qt6)
     include( ${CGAL_USE_FILE} )
-    # Find Qt5 itself
-    find_package(Qt5
-                 QUIET
-                 COMPONENTS            OpenGL Script Svg Xml
-                 OPTIONAL_COMPONENTS   ScriptTools)
+    # Find Qt6 itself
+    find_package(Qt6 QUIET
+                 COMPONENTS OpenGLWidgets Svg
+                 OPTIONAL_COMPONENTS WebSockets)
 
-    if(Qt5_FOUND AND CGAL_FOUND)
+    if(Qt6_FOUND AND CGAL_FOUND)
       find_package(CGAL_polyhedron_demo)
 
     include( ${CGAL_POLYHEDRON_DEMO_USE_FILE} )