CMakeを使ったHello World

https://docs.wxwidgets.org/latest/overview_helloworld.html

作業ディレクトリ

$ cd ~/code/wxwidgets
$ mkdir hello-wxwidgets-cmake
$ cd hello-wxwidgets-cmake

main.cpp

/**************************************************************/
/* https://docs.wxwidgets.org/latest/overview_helloworld.html */
/**************************************************************/

// Start of wxWidgets "Hello World" Program
#include <wx/wx.h>

class MyApp : public wxApp {
public:
  bool OnInit() override;
};

wxIMPLEMENT_APP(MyApp);

class MyFrame : public wxFrame {
public:
  MyFrame();

private:
  void OnHello(wxCommandEvent &event);
  void OnExit(wxCommandEvent &event);
  void OnAbout(wxCommandEvent &event);
};

enum { ID_Hello = 1 };

bool MyApp::OnInit() {
  MyFrame *frame = new MyFrame();
  frame->Show(true);
  return true;
}

MyFrame::MyFrame() : wxFrame(nullptr, wxID_ANY, "Hello World") {
  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!");

  Bind(wxEVT_MENU, &MyFrame::OnHello, this, ID_Hello);
  Bind(wxEVT_MENU, &MyFrame::OnAbout, this, wxID_ABOUT);
  Bind(wxEVT_MENU, &MyFrame::OnExit, this, wxID_EXIT);
}

void MyFrame::OnExit(wxCommandEvent &event) { Close(true); }

void MyFrame::OnAbout(wxCommandEvent &event) {
  wxMessageBox("This is a wxWidgets Hello World example", "About Hello World",
               wxOK | wxICON_INFORMATION);
}

void MyFrame::OnHello(wxCommandEvent &event) {
  wxLogMessage("Hello world from wxWidgets!");
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.5 FATAL_ERROR)

project(hello-wxwidgets-cmake LANGUAGES CXX)

# https://cmake.org/cmake/help/latest/module/FindwxWidgets.html
find_package(wxWidgets REQUIRED)
include(${wxWidgets_USE_FILE})

add_executable(hello-wxwidgets-cmake main.cpp)

target_link_libraries(hello-wxwidgets-cmake ${wxWidgets_LIBRARIES})

ビルドディレクトリ

$ mkdir build
$ cd build

CMakeコンフィギュレーション

$ cmake ..
-- The CXX compiler identification is GNU 13.3.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found wxWidgets: -L/usr/lib/x86_64-linux-gnu;-pthread;;;-lwx_gtk3u_xrc-3.2;-lwx_gtk3u_html-3.2;-lwx_gtk3u_qa-3.2;-lwx_gtk3u_core-3.2;-lwx_baseu_xml-3.2;-lwx_baseu_net-3.2;-lwx_baseu-3.2 (found version "3.2.4") 
-- Configuring done (0.3s)
-- Generating done (0.0s)
-- Build files have been written to: /home/freemikan/code/wxwidgets/hello-wxwidgets-cmake/build

ビルド

$ make
[ 50%] Building CXX object CMakeFiles/hello-wxwidgets-cmake.dir/main.cpp.o
[100%] Linking CXX executable hello-wxwidgets-cmake
[100%] Built target hello-wxwidgets-cmake

ビルド結果の確認

$ ls -l
合計 180
-rw-rw-r-- 1 freemikan freemikan  13370  5月 23 08:32 CMakeCache.txt
drwxrwxr-x 6 freemikan freemikan   4096  5月 23 08:32 CMakeFiles
-rw-rw-r-- 1 freemikan freemikan   5472  5月 23 08:32 Makefile
-rw-rw-r-- 1 freemikan freemikan   1680  5月 23 08:32 cmake_install.cmake
-rwxrwxr-x 1 freemikan freemikan 151144  5月 23 08:32 hello-wxwidgets-cmake

実行

$ ./hello-wxwidgets-cmake