wxwidget程序诠释

#include "wx/wx.h"

/*声明app*/ 
class MyApp: public wxApp
{
    virtual bool OnInit();
};
/*声明frame*/ 
class MyFrame: public wxFrame
{
public:

    MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);

    void OnQuit(wxCommandEvent& event);
    void OnAbout(wxCommandEvent& event);

    DECLARE_EVENT_TABLE()//使用宏来声明事件table 
};
/*定义事件ID,用于事件响应与事件处理函数的绑定*/ 
enum
{
    ID_Quit = 1,
    ID_About,
};

BEGIN_EVENT_TABLE(MyFrame, wxFrame)
    EVT_MENU(ID_Quit,  MyFrame::OnQuit)
    EVT_MENU(ID_About, MyFrame::OnAbout)
END_EVENT_TABLE()

/*使用宏来实现一个main方法,在这个main方法中创建一个应用实例并且启动程序*/
IMPLEMENT_APP(MyApp)

/*实现app*/ 
bool MyApp::OnInit()
{
    MyFrame *frame = new MyFrame( _("Hello World"), wxPoint(50, 50), wxSize(450, 340) );
    frame->Show(true);
    SetTopWindow(frame);
    return true;
}
/*实现MyFrame*/ 
MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
       : wxFrame(NULL, -1, title, pos, size)
{
    wxMenu *menuFile = new wxMenu;

    menuFile->Append( ID_About, _("&About...") );
    menuFile->AppendSeparator();
    menuFile->Append( ID_Quit, _("E&xit") );

    wxMenuBar *menuBar = new wxMenuBar;
    menuBar->Append( menuFile, _("&File") );

    SetMenuBar( menuBar );

    CreateStatusBar();
    SetStatusText( _("Welcome to wxWidgets!") );
}
/*实现MyFrame成员方法*/ 
void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
{
    Close(true);
}
/*实现MyFrame成员方法*/ 
void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
{
    wxMessageBox( _("This is a wxWidgets Hello world sample"),
                  _("About Hello World"), 
                  wxOK | wxICON_INFORMATION, this );
}