duilib duilib 4. Concise Guide to Getting Started tutorial respond to button events

Hello World is a tutorial , there are a code like this: CControlUI * pWnd = new CButtonUI; that is, in fact, that entire area green background area are buttons. (Down briefly here, CControlUI is duilib the base class for all controls, buttons and CButtonUI is a class, more controls will be introduced one by one in a later tutorial.)
    So how do you respond to click on the message button do?
    We need some step:
    1, the function call message AddNotifier added duilib message loop
    2, to a unique set of control buttons ID (SetName function)
    3, in the Notify message processing function button clicks inside.
    code show as below:

1. class CDuiFrameWnd : public CWindowWnd, public INotifyUI
2. {
3. public:
4.     virtual LPCTSTR GetWindowClassName() const { return _T("DUIMainFrame"); }
5.     virtual void    Notify(TNotifyUI& msg) 
6.     {
7.         if(msg.sType == _T("click"))
8.         {
9.             if(msg.pSender->GetName() == _T("btnHello")) 
10.             {
11.                 :: MessageBox (NULL, _T ( "I'm Button"), _T ( "click on the button"), NULL);
12.             }
13.         }
14.     }
16.     virtual LRESULT HandleMessage(UINT uMsg, WPARAM wParam, LPARAM lParam)
17.     {
18.         LRESULT lRes = 0;
20.         if( uMsg == WM_CREATE ) 
21.         {
22.             CControlUI *pWnd = new CButtonUI;
23.             pWnd-> SetName (_T ( "btnHello")); // Set the name of the control, the name used to identify each control, must be unique, which corresponds to the MFC control ID
24.             pWnd-> SetText (_T ( "Hello World")); // set the text
25.             pWnd-> SetBkColor (0xFF00FF00); // set the background color
27.             m_PaintManager.Init(m_hWnd);
28.             m_PaintManager.AttachDialog(pWnd);
29.             m_PaintManager.AddNotifier (this); // add message response controls, etc., which will convey the message to the message loop duilib we can do in the Notify message processing function in
30.             return lRes;
31.         }
33.         if( m_PaintManager.MessageHandler(uMsg, wParam, lParam, lRes) ) 
34.         {
35.             return lRes;
36.         }
38.         return __super::HandleMessage(uMsg, wParam, lParam);
39.     }
41. protected:
42.     CPaintManagerUI m_PaintManager;
43. };

Copy the code

Run results shown in Figure: