Create wxwidgets example. Working on macos.

.gitignore

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+build

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.20)
+project(wxTest)
+
+find_package(wxWidgets REQUIRED gl core base OPTIONAL_COMPONENTS net)
+include(${wxWidgets_USE_FILE})
+
+add_executable(wxTest main.cpp)
+target_link_libraries(wxTest PRIVATE ${wxWidgets_LIBRARIES})

compile.sh

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+#!/bin/bash
+
+mkdir -p build
+cd build
+cmake ..
+make -j # builds with all cores

main.cpp

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+// wxWidgets "Hello world" Program
+// For compilers that support precompilation, includes "wx/wx.h".
+#include <wx/wxprec.h>
+#ifndef WX_PRECOMP
+    #include <wx/wx.h>
+#endif
+class MyApp: public wxApp
+{
+public:
+    virtual bool OnInit();
+};
+class MyFrame: public wxFrame
+{
+public:
+    MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
+private:
+    void OnHello(wxCommandEvent& event);
+    void OnExit(wxCommandEvent& event);
+    void OnAbout(wxCommandEvent& event);
+    wxDECLARE_EVENT_TABLE();
+};
+enum
+{
+    ID_Hello = 1
+};
+wxBEGIN_EVENT_TABLE(MyFrame, wxFrame)
+    EVT_MENU(ID_Hello,   MyFrame::OnHello)
+    EVT_MENU(wxID_EXIT,  MyFrame::OnExit)
+    EVT_MENU(wxID_ABOUT, MyFrame::OnAbout)
+wxEND_EVENT_TABLE()
+wxIMPLEMENT_APP(MyApp);
+bool MyApp::OnInit()
+{
+    MyFrame *frame = new MyFrame( "Hello World", wxPoint(50, 50), wxSize(450, 340) );
+    frame->Show( true );
+    return true;
+}
+MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
+        : wxFrame(NULL, wxID_ANY, title, pos, size)
+{
+    wxMenu *menuFile = new wxMenu;
+    menuFile->Append(ID_Hello, "&Hello...\tCtrl-H",
+                     "Help string shown in status bar for this menu item");
+    menuFile->AppendSeparator();
+    menuFile->Append(wxID_EXIT);
+    wxMenu *menuHelp = new wxMenu;
+    menuHelp->Append(wxID_ABOUT);
+    wxMenuBar *menuBar = new wxMenuBar;
+    menuBar->Append( menuFile, "&File" );
+    menuBar->Append( menuHelp, "&Help" );
+    SetMenuBar( menuBar );
+    CreateStatusBar();
+    SetStatusText( "Welcome to wxWidgets!" );
+}
+void MyFrame::OnExit(wxCommandEvent& event)
+{
+    Close( true );
+}
+void MyFrame::OnAbout(wxCommandEvent& event)
+{
+    wxMessageBox( "This is a wxWidgets' Hello world sample",
+                  "About Hello World", wxOK | wxICON_INFORMATION );
+}
+void MyFrame::OnHello(wxCommandEvent& event)
+{
+    wxLogMessage("Hello world from wxWidgets!");
+}