SubMeus

#include<wx/wx.h>#include<wx/menu.h>class SubMenu:public wxFrame{public:    SubMenu(const wxString& title);    void OnQuit(wxCommandEvent & event);    wxMenuBar *menubar;    wxMenu *file;    wxMenu *imp;    wxMenuItem *quit;};SubMenu::SubMenu(const wxString& title)    :wxFrame(NULL,wxID_ANY,title,wxDefaultPosition,wxSize(280,180)){    menubar=new wxMenuBar;    file=new wxMenu;    imp=new wxMenu;    file->Append(wxID_ANY,wxT("&New"));    file->Append(wxID_ANY,wxT("&Open"));    file->Append(wxID_ANY,wxT("&Save"));    file->AppendSeparator();//加入一条分割线    imp->Append(wxID_ANY,wxT("Import newfeed list..."));    imp->Append(wxID_ANY,wxT("Import bookmarks..."));    imp->Append(wxID_ANY,wxT("Import mail..."));    file->AppendSubMenu(imp,wxT("&Import"));//imp作为file子菜单    quit=new wxMenuItem(file,wxID_EXIT,wxT("&Quit\tCtrl+Q"));    file->Append(quit);//Append()的另一种重载形式，共4种    menubar->Append(file,wxT("&File"));    SetMenuBar(menubar);    Connect(wxID_EXIT,wxEVT_COMMAND_MENU_SELECTED,wxCommandEventHandler(SubMenu::OnQuit));    Centre();}void SubMenu::OnQuit(wxCommandEvent& WXUNUSED(event)){    Close(true);}class MyApp:public wxApp{    public:    virtual bool OnInit();};IMPLEMENT_APP(MyApp)bool MyApp::OnInit(){    SubMenu *smenu=new SubMenu(wxT("SubMenu"));    smenu->Show(true);    return true;}

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