Hello World

作業ディレクトリ

$HOME/code/wxwidgets/hello-wxwidgets

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!");
}

コンパイル

$ g++ -c main.cpp `wx-config --cxxflags`

コンパイル結果の確認

$ ls -l
合計 200
-rw-rw-r-- 1 freemikan freemikan   1597  5月 23 07:38 main.cpp
-rw-rw-r-- 1 freemikan freemikan 197544  5月 23 07:38 main.o

リンク

$ g++ -o hello-wxwidgets main.o `wx-config --libs`

リンク結果の確認

$ ls -l
合計 348
-rwxrwxr-x 1 freemikan freemikan 151144  5月 23 07:41 hello-wxwidgets
-rw-rw-r-- 1 freemikan freemikan   1597  5月 23 07:38 main.cpp
-rw-rw-r-- 1 freemikan freemikan 197544  5月 23 07:38 main.o

実行

$ ./hello-wxwidgets