[09/30/2022] 在Windows下增加qt和qt环境变量使能matplotlib-cpp

SNSerHello · SNSerHello · commit 9ce4facf6b6f · 2022-09-30T00:34:56.000+08:00
在Windows下增加qt和qt环境变量使能matplotlib-cpp
diff --git a/README.md b/README.md
@@ -9,6 +9,7 @@ It is built to resemble the plotting API used by Matlab and matplotlib.
 ### Windows
 
 ```bash
+conda install qt
 mkdir build
 cd build
 cmake .. -G "Visual Studio 15 2017 Win64" -DCMAKE_INSTALL_PREFIX=..\dist
diff --git a/matplotlib.h b/matplotlib.h
@@ -68,8 +68,12 @@ static bool __XXX_YYY_ZZZ_INIT__() {
     const std::string PYTHONPATH = PYTHONHOME + ";" + PYTHONHOME +
                                    R"(\site-packages;)" + CONDA_PREFIX +
                                    R"(\DLLs)";
+    const std::string QT_QPA_PLATFORM_PLUGIN_PATH =
+        CONDA_PREFIX + R"(\Library\plugins\platforms)";
     _putenv_s("PYTHONHOME", PYTHONHOME.c_str());
     _putenv_s("PYTHONPATH", PYTHONPATH.c_str());
+    _putenv_s("QT_QPA_PLATFORM_PLUGIN_PATH",
+              QT_QPA_PLATFORM_PLUGIN_PATH.c_str());
 #else
     const std::string PYTHONHOME =
         CONDA_PREFIX + "/lib/python" + PYTHON_VERSION;
