如何编译安装fcitx-handwriting?

[guyuming76]

我想找一个开源的手写识别输入法学习下, 找到了 https://github.com/fcitx/fcitx-handwriting

我尝试编译:
mkdir build
cd build
cmake ..
结果如下:(之前报错说找不到fcitx提示我设置Fcitx_DIR变量,我设置到了fcitx4/cmake目录,我checkout的tag是4.2.0)
CMake Warning (dev) at CMakeLists.txt:1 (project):
cmake_minimum_required() should be called prior to this top-level project()
call. Please see the cmake-commands(7) manual for usage documentation of
both commands.
This warning is for project developers. Use -Wno-dev to suppress it.

CMake Deprecation Warning at CMakeLists.txt:3 (cmake_minimum_required):
Compatibility with CMake < 3.5 will be removed from a future version of
CMake.

Update the VERSION argument value or use a ... suffix to tell
CMake that the project does not need compatibility with older versions.

CMake Error at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
Could NOT find Fcitx (missing: FCITX4_VERSION)
Call Stack (most recent call first):
/usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:600 (_FPHSA_FAILURE_MESSAGE)
/home/guyuming/fcitx4/cmake/FcitxConfig.cmake:89 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
CMakeLists.txt:7 (find_package)

这个提示里FCITX4_VERSION咋回事?

---

更新: 我觉得前面的错误可能和机器上装的fcitx5版本有关系,于是我卸了fcitx5, 自己参照fcitx4.2.9.8.ebuild自己改成fcitx4.2.5版本
https://gitee.com/guyuming76/suckless_wl_zh/blob/master/app-i18n/fcitx/fcitx-4.2.5.ebuild
并安装,然后删掉 fcitx-handwring/build目录重建重新编译,cmake成功了,make报如下错误:

[ 75%] Building C object im/CMakeFiles/fcitx-handwriting-im.dir/handwriting.c.o
/home/guyuming/fcitx-handwriting/im/handwriting.c:19:56: 错误：unknown type name ‘CandidateWord’; did you mean ‘FcitxCandidateWord’?
   19 | INPUT_RETURN_VALUE HandWritingGetCandWord ( void *arg, CandidateWord* candWord );
      |                                                        ^~~~~~~~~~~~~
      |                                                        FcitxCandidateWord
/home/guyuming/fcitx-handwriting/im/handwriting.c:22:1: 错误：未知的类型名‘DBusHandlerResult’
   22 | DBusHandlerResult HandWritingDBusFilter ( DBusConnection* connection, DBusMessage* msg, void* user_data );
      | ^~~~~~~~~~~~~~~~~
/home/guyuming/fcitx-handwriting/im/handwriting.c:22:43: 错误：未知的类型名‘DBusConnection’
   22 | DBusHandlerResult HandWritingDBusFilter ( DBusConnection* connection, DBusMessage* msg, void* user_data );
      |                                           ^~~~~~~~~~~~~~
/home/guyuming/fcitx-handwriting/im/handwriting.c:22:71: 错误：未知的类型名‘DBusMessage’
   22 | DBusHandlerResult HandWritingDBusFilter ( DBusConnection* connection, DBusMessage* msg, void* user_data );
      |                                                                       ^~~~~~~~~~~
/home/guyuming/fcitx-handwriting/im/handwriting.c:27:9: 错误：未知的类型名‘DBusConnection’
   27 |         DBusConnection* conn;
      |         ^~~~~~~~~~~~~~
/home/guyuming/fcitx-handwriting/im/handwriting.c: 在函数‘HandWritingCreate’中:
/home/guyuming/fcitx-handwriting/im/handwriting.c:40:41: 警告：implicit declaration of function ‘fcitx_malloc0’; did you mean ‘fcitx_utils_malloc0’? [-Wimplicit-function-declaratio
]
   40 |         FcitxHandWriting* handwriting = fcitx_malloc0 ( sizeof ( FcitxHandWriting ) );
      |                                         ^~~~~~~~~~~~~
      |                                         fcitx_utils_malloc0
/home/guyuming/fcitx-handwriting/im/handwriting.c:40:41: 警告：initialization of ‘FcitxHandWriting *’ {或称 ‘struct _FcitxHandWriting *’} from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
In file included from /home/guyuming/fcitx-handwriting/im/handwriting.c:1:
/home/guyuming/fcitx-handwriting/im/handwriting.c:43:56: 错误：‘DBusConnection’未声明(在此函数内第一次使用)
   43 |         handwriting->conn = InvokeFunction ( instance, FCITX_DBUS, GETCONNECTION, arg );
      |                                                        ^~~~~~~~~~
/home/guyuming/fcitx-handwriting/im/handwriting.c:43:56: 附注：每个未声明的标识符在其出现的函数内只报告一次
In file included from /home/guyuming/fcitx-handwriting/im/handwriting.c:7:
/home/guyuming/fcitx-handwriting/im/handwriting.c:43:29: 错误：expected expression before ‘)’ token
   43 |         handwriting->conn = InvokeFunction ( instance, FCITX_DBUS, GETCONNECTION, arg );
      |                             ^~~~~~~~~~~~~~
/home/guyuming/fcitx-handwriting/im/handwriting.c:51:9: 错误：未知的类型名‘DBusError’
   51 |         DBusError err;
      |         ^~~~~~~~~
/home/guyuming/fcitx-handwriting/im/handwriting.c:52:9: 警告：隐式声明函数‘dbus_error_init’ [-Wimplicit-function-declaration]
   52 |         dbus_error_init ( &err );
      |         ^~~~~~~~~~~~~~~
/home/guyuming/fcitx-handwriting/im/handwriting.c:53:9: 警告：隐式声明函数‘dbus_bus_add_match’ [-Wimplicit-function-declaration]
   53 |         dbus_bus_add_match ( handwriting->conn,
      |         ^~~~~~~~~~~~~~~~~~
/home/guyuming/fcitx-handwriting/im/handwriting.c:57:9: 警告：隐式声明函数‘dbus_connection_flush’ [-Wimplicit-function-declaration]
   57 |         dbus_connection_flush ( handwriting->conn );
      |         ^~~~~~~~~~~~~~~~~~~~~
/home/guyuming/fcitx-handwriting/im/handwriting.c:58:14: 警告：隐式声明函数‘dbus_error_is_set’ [-Wimplicit-function-declaration]
   58 |         if ( dbus_error_is_set ( &err ) )
      |              ^~~~~~~~~~~~~~~~~
/home/guyuming/fcitx-handwriting/im/handwriting.c:60:17: 警告：隐式声明函数‘dbus_error_free’ [-Wimplicit-function-declaration]
   60 |                 dbus_error_free ( &err );
      |                 ^~~~~~~~~~~~~~~
In file included from /usr/include/fcitx-config/fcitx-config.h:106,
                 from /usr/include/fcitx/module/dbus/dbusstuff.h:28:
/home/guyuming/fcitx-handwriting/im/handwriting.c:61:58: 错误：在非结构或联合中请求成员‘message’

---

我一开始就看到了这个链接：
fcitx/fcitx-handwriting#1
但当时没明白．我今天照着这个做果然就编译成功了．

并且make install 之后，运行fcitx可以看到手写输入的窗口，以及窗口里的诸如ABC,123按钮．但是我按任意按钮，或者在手写框里面用笔记本触摸板（应该和鼠标效果一样吧），那个手写窗口就消失了．但fcitx本身还可以用，还可以切换到拼音输入汉字．用带debug参数编译的fcitx，但也没看到啥提示信息.
我窗口管理器用的是xorg下的DWM

[guyuming76]

debug的结果是那个stroke对象为NULL．我看到代码里有通过fprintf(stderr, 写些日志的,但fcitx-handwriting进程的0,1,2文件都是/dev/null．　我应该如何设置才能看到输出的日志呢？

[guyuming76]

fcitx-handwriting 貌似是由dbus启动的．
如果直接在命令行执行　fcitx-handwriting, 会看到如下错

guyuming@localhost ~ $ fcitx-handwriting
Gtk-Message: 05:16:07.082: Failed to load module "canberra-gtk-module"
ERROR: recognizer.cpp(104) [mmap_.open(filename)] no such file or directory: /usr/lib/zinnia/model/to
odel

Readme里有关于zinnia手写库安装位置的，我用的gentoo包默认安装的，估计不行．
我更新了下README:https://gitee.com/guyuming76/fcitx-handwriting

[wengxt]

它从未被 port 到 fcitx 5 过，而且当年也只是一个 demo 的状态