[wx]系统托盘(Tray)-wxTaskBarIcon

[wx] 系统托盘(Tray) ---- wxTaskBarIcon 

lib: wxmsw28u_adv.lib

---------------------------- MyTray.h -----------------------------

#include <wx/wx.h>
#include <wx/taskbar.h>

class MyTray : public wxTaskBarIcon
{
public:
    void OnAbout(wxCommandEvent& event);

protected:
    virtual wxMenu *CreatePopupMenu();

private:
    DECLARE_EVENT_TABLE();
};

-----------------------------------------------------------------------

#include "MyTray.h"

BEGIN_EVENT_TABLE(MyTray, wxTaskBarIcon)
    EVT_MENU(wxID_ABOUT, MyTray::OnAbout)
END_EVENT_TABLE()

wxMenu *MyTray::CreatePopupMenu()
{
    // 每次都要 new 一个新的 wxMenu
    wxMenu *popupMenu = new wxMenu;
    popupMenu->Append(wxID_ABOUT, _("About"));
    popupMenu->AppendSeparator();
    popupMenu->Append(wxID_EXIT, _("Exit"));
    return popupMenu;
}

void MyTray::OnAbout(wxCommandEvent& event)
{
    wxMessageBox(_T("hello!"), wxT("About Tray!"), wxOK | wxICON_INFORMATION);
}

------------------------ MyFrame.cpp --------------------------

MyFrame::MyFrame(const wxString &title) : wxFrame(NULL, wxID_ANY, title)
{
    ....
    m_Tray = new MyTray();
    m_Tray->SetIcon(wxIcon(cut_xpm), _("Hello Tray!"));
}

MyFrame::~MyFrame()
{
    if ( m_Tray )
        delete m_Tray;
}

-----------------------------------------------------------------------

使用 wxTaskBarIcon 的退出流程
  1. 在 wxTaskBarIcon 上点'退出'，调用 m_pMainFrame->Close()
  2. MainFrame 收到消息，最后调用自己的 wxFrame::Destroy()
  3. 进入析构函数，delete m_pTray，通过 wxTaskBarIcon::~wxTaskBarIcon() 完成退出流程

因为在 win32 下，wxTaskBarIcon 后面隐含着一个 TopLevelWindow，而此 TopLevelWindow 不退出，app 也是不会退出的。
http://kasicass.blog.163.com/blog/static/395619201071093547410/