wxwidgets:helloworld-cmake [HYPER MIKAN BOX]

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====== CMakeを使ったHello World ======

{{:wxwidgets:wxwidgets_logo_blocks.svg?150|wxWidgets Logo}}


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


作業ディレクトリ

<cli>
$ cd ~/code/wxwidgets
$ mkdir hello-wxwidgets-cmake
$ cd hello-wxwidgets-cmake
</cli>

__main.cpp__

<code 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!");
}
</code>

__CMakeLists.txt__

<code cmake>
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})
</code>

ビルドディレクトリ

<cli>
$ mkdir build
$ cd build
</cli>

CMakeコンフィギュレーション

<cli>
$ 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
</cli>

ビルド

<cli>
$ 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
</cli>

ビルド結果の確認

<cli>
$ 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
</cli>

実行

<cli>
$ ./hello-wxwidgets-cmake
</cli>

{{ :wxwidgets:wxwidgets_hello.jpg |Hello wxWidgets}}