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;
}

运行结果：