Déclaration d'une calback dans une classe ?
Bonjours,
Je voudrai savoir comment on déclare la fonction. l'exemple ici est celui fourni par défaut de code block
*.hpp
Code:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
|
#ifndef DEF_ME_WIN
#define DEF_ME_WIN
#include <tchar.h>
#include <windows.h>
#include <iostream>
class C_MeDefaultWindows
{
public:
C_MeDefaultWindows ();
void WinDefault(HINSTANCE & hThisInstance);
//private:
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
};
#endif |
Code:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
#include "cdefaultwindows.hpp"
C_MeDefaultWindows::C_MeDefaultWindows(){}
LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message) /* handle the messages */
{
case WM_DESTROY:
PostQuitMessage (0); /* send a WM_QUIT to the message queue */
break;
default: /* for messages that we don't deal with */
return DefWindowProc (hwnd, message, wParam, lParam);
}
return 0;
}
void C_MeDefaultWindows::WinDefault(HINSTANCE & hThisInstance){
HWND hwnd; /* This is the handle for our window */
MSG messages; /* Here messages to the application are saved */
WNDCLASSEX wincl; /* Data structure for the windowclass */
TCHAR szClassName[ ] = _T("CodeBlocksWindowsApp");
/* The Window structure */
wincl.hInstance = hThisInstance;
wincl.lpszClassName = szClassName;
wincl.lpfnWndProc = C_MeDefaultWindows::WindowProcedure; /* comment déclarer ?? */
wincl.style = CS_DBLCLKS; /* Catch double-clicks */
wincl.cbSize = sizeof (WNDCLASSEX);
/* Use default icon and mouse-pointer */
wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
wincl.lpszMenuName = NULL; /* No menu */
wincl.cbClsExtra = 0; /* No extra bytes after the window class */
wincl.cbWndExtra = 0; /* structure or the window instance */
/* Use Windows's default colour as the background of the window */
wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;
}; |
Code:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
|
#if defined(UNICODE) && !defined(_UNICODE)
#define _UNICODE
#elif defined(_UNICODE) && !defined(UNICODE)
#define UNICODE
#endif
#include <tchar.h>
#include <windows.h>
#include "cdefaultwindows.hpp"
#include <iostream>
/* Declare Windows procedure */
//LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
/* Make the class name into a global variable */
//TCHAR szClassName[ ] = _T("CodeBlocksWindowsApp");
int WINAPI WinMain (HINSTANCE hThisInstance,
HINSTANCE hPrevInstance,
LPSTR lpszArgument,
int nCmdShow)
{
C_MeDefaultWindows CMDW;
CMDW.WinDefault(hThisInstance);
return 0;
} |
Code:
1
2
3
|
28:23: error: cannot convert 'C_MeDefaultWindows::WindowProcedure' from type 'LRESULT (C_MeDefaultWindows::)(HWND, UINT, WPARAM, LPARAM) {aka long int (C_MeDefaultWindows::)(HWND__*, unsigned int, unsigned int, long int)}' to type 'WNDPROC {aka long int (__attribute__((__stdcall__)) *)(HWND__*, unsigned int, unsigned int, long int)}'
wincl.lpfnWndProc = C_MeDefaultWindows::WindowProcedure; /* This function is called by windows */ |
La ligne concernée c'est donc WindowProcedure.
Merci d'avance
