MFC resource message Response Mechanism

 

MFC message Response Mechanism

 

There are many resources in MFC, such as standard resources, menu resources, and toolbar resources. How do resources map message response and message?

Their process is:

A resource -- corresponding idnumber -- message ing -- declaration and implementation of the Response Function

The following uses the resource response in the toolbar as an example: (Multi-document applications)

1. Add an icon to the toolbar Resource (just click it), double-click it, and set its resource ID to id_myicon.

2. Add message ing to the. cpp file of the View class;

Find begin_message_map () and end_message_map ()

To add message ing statements.

On_command (id_myicon, onmyicon)

The first parameter is the resource ID, and the second parameter is the function name of the message response. To be consistent with the habit of MFC, we name itOnmyicon

3. Message response function declaration

Add member functions to the View classAfx_msgVoid onmyicon ();

4. Implementation of message Response Functions

Implement the onmyicon () function in the. cpp file of the View class;

Void cxxxxxview: onmyicon ()

{

MessageBox ("message ing successful! ");

}

The message response mechanism of menu resources is identical;

 

Windows OS includes the following messages:

1,Standard Windows messages: This message usesWM _Headers.

2. Notification Message

Notification messages are messages for standard Windows controls.

These controls include buttons, ComboBox, Textbox, ListBox, listview, Treeview, toolbar, and menu). Each type of message starts with a different string. (See Appendix)

3. Custom messagesProgrammers can also customize messages.

 

Appendix:

From msdn, we can see a lotOn _StartingMacroTo list some examples.

User button handlers (button)

Map entry	Function prototype
On_bn_clicked (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_bn_disable (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_bn_doubleclicked (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_bn_hilite (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_bn_paint (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_bn_unhilite (<ID>, <memberfxn>)	Afx_msg void memberfxn ();

Combo box handlers (combo box)

Map entry	Function prototype
On_cbn_closeup (<ID>, <memberfxn>)	Afx_msg void memberfxn ()
On_cbn_dblclk (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_cbn_dropdown (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_cbn_editchange (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_cbn_editupdate (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_cbn_errspace (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_cbn_killfocus (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_cbn_selchange (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_cbn_selendcancel (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_cbn_selendok (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_cbn_setfocus (<ID>, <memberfxn>)	Afx_msg void memberfxn ();

Edit Control handlers (edit box)

Map entry	Function prototype
On_en_change (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_en_errspace (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_en_hscroll (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_en_killfocus (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_en_maxtext (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_en_setfocus (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_en_update (<ID>, <memberfxn>)	Afx_msg void memberfxn ();
On_en_vscroll (<ID>, <memberfxn>)	Afx_msg void memberfxn ();

 

 

 

Wait .................................... (See msdn)