[Dev-C++] SetWindowLong e WindowProcedure

[DanieleC88]

Sto cercando in tutti i modi di impostare una WindowProcedure personalizzata per un RichEdit, ma purtroppo SetWindowLong ha bisogno di un valore long, invece la WindowProcedure che sto cercando di impostare mi restituisce LRESULT, e sembra che MinGW non passi automaticamente l'indirizzo alla funzione.

Sto usando:
RichWndProc = (WNDPROC) SetWindowLong (hWnd, GWL_WNDPROC, EditWndProc);

e MinGW mi restituisce:
dllmain.cpp:47: cannot resolve overloaded function `EditWndProc' based on conversion to type `long int'.

Come posso fare ?

[cionci]

Fai un cast a LONG !!!

RichWndProc = (WNDPROC) SetWindowLong (hWnd, GWL_WNDPROC, (LONG)EditWndProc);

[DanieleC88]

E secondo te non ci ho provato ?
Mi sembra che MinGW provi a farlo da solo, ma mi dà lo stesso risultato. Anzi mi pare che mi risponda "aggregated value when long expected" o qualcosa di simile.

[cionci]

Non è che mi dai un esempio corto che ripresenta il problema ?

[DanieleC88]

In questo momento non posso. Windows e i suoi crash... in pratica ho solo una finestra di Mozilla e il desktop vuoto...
Appena posso ti mando il codice incriminato...

[DanieleC88]

Allora...

In dllmain.cpp:

#include <richedit.h>
#include <windows.h>

#include "codeedit.h"

const char *richedit20 = "riched20.dll";
const char *richedit32 = "riched32.dll";

HINSTANCE hInstance;
HINSTANCE hRichInst;
HWND hWnd;

CodeEdit::CodeEdit ()
{
}
CodeEdit::~CodeEdit ()
{
}

int
CodeEdit::Create (HWND hwOwner)
{
  int ownWidth, ownHeight;
  RECT ownClientRect;
  
  GetClientRect (hwOwner, &ownClientRect);
  ownWidth = ownClientRect.right;
  ownHeight = ownClientRect.bottom;
  
  hRichInst = LoadLibrary (richedit20);
  if (!hRichInst) hRichInst = LoadLibrary (richedit32);
  if (!hRichInst) return ERR_NORICHEDIT;
  hWnd = CreateWindow (RICHEDIT_CLASS, NULLSTR, EditWndStyle, 0, 0, ownWidth,
                       ownHeight, hwOwner, (HMENU) IDCODEEDIT, hInstance, NULL);
  if (!hWnd) return ERR_NOCONTROL;

  RichWndProc = (WNDPROC) SetWindowLong (hWnd, GWL_WNDPROC, (LONG) EditWndProc);
  SendMessage (hWnd, EM_SETOPTIONS, (WPARAM) ECOOP_OR, (LPARAM) ECO_AUTOWORDSELECTION);
  SendMessage (hWnd, EM_SETBKGNDCOLOR, (WPARAM) FALSE, (LPARAM) COLOR_WHITE);
  return ERR_NOERROR;
}

void
CodeEdit:: Destroy () //Incredibile, senza spazio, HardwareUpgrade me lo converte in uno smiley!
{
  DestroyWindow (hWnd);
  FreeLibraryAndExitThread (hRichInst, 0);
}

LPSTR
CodeEdit::GetText ()
{
  LPSTR result;

  GetWindowText (hWnd, result, GetWindowTextLength (hWnd));
  return result;
}

void
CodeEdit::SetText (LPSTR text)
{
  SetWindowText (hWnd, text);
}

void
CodeEdit::SetFont (LPSTR fName, int fSize)
{
  HFONT hNewFont;

  hNewFont = GetFont (fName, fSize);
    SendMessage (hWnd, WM_SETFONT, (WPARAM) hNewFont, MAKELPARAM (TRUE, 0));
  DeleteObject (hNewFont);
}

LRESULT CALLBACK
CodeEdit::EditWndProc (HWND hwnd, UINT msg, WPARAM wpar, LPARAM lpar)
{
  switch (msg) {
    case WM_KEYDOWN:
      int *key, *data;

      key = (int*)wpar;
      data = (int*)lpar;
      OnKeyDown (key);
      break;
    default:
    LRESULT RichResult;

      RichResult = RichWndProc (hwnd, msg, wpar, lpar);
      return RichResult;
      //return DefWindowProc (hwnd, msg, wpar, lpar);
  }
  return 0;
}

void
CodeEdit::SetKeyDownEvent (LPKEYDOWN EventKeyDown)
{
  OnKeyDown = *EventKeyDown;
}

BOOL APIENTRY
DllMain (HINSTANCE hInst, DWORD reason, LPVOID reserved)
{
  switch (reason)
  {
    case DLL_PROCESS_ATTACH:
      hInstance = hInst;
      break;
    case DLL_PROCESS_DETACH:
      break;

    case DLL_THREAD_ATTACH:
      break;
    case DLL_THREAD_DETACH:
      break;
  }

  return TRUE;
}

In CodeEdit.h:

#ifndef _CODEEDIT_H_
#define _CODEEDIT_H_

#if BUILDING_DLL
  #define dllspec __declspec (dllexport)
#else /* Not BUILDING_DLL */
  #define dllspec __declspec (dllimport)
#endif /* Not BUILDING_DLL */

#include <windows.h>

//----------------------------------------------------------------------------//
#define IDCODEEDIT                                                      0x00CDED
//----------------------------------------------------------------------------//
#define ERR_BASE                                                        0x0CACCA
#define ERR_NOERROR                                                     0x000000
#define ERR_NORICHEDIT                                           ERR_BASE + 0x01
#define ERR_NOCONTROL                                            ERR_BASE + 0x02
//----------------------------------------------------------------------------//
#define NULLSTR                                                               ""
//----------------------------------------------------------------------------//
#define COLOR_BLACK                                                     0x000000
#define COLOR_WHITE                                                     0xFFFFFF
//----------------------------------------------------------------------------//



//----------------------------------------------------------------------------//
typedef void (FAR *KEYDOWN)(int*); typedef KEYDOWN *LPKEYDOWN;
//----------------------------------------------------------------------------//

class dllspec CodeEdit
{
  public:
    // constructor / destructor procedures
    CodeEdit ();
    virtual ~CodeEdit (void);

    // initialization / termination procedures
    int Create (HWND hwOwner);
    void Destroy ();
  
    // event handlers
    KEYDOWN OnKeyDown;
    void SetKeyDownEvent (LPKEYDOWN EventKeyDown);
  
    // standard functions and procedures
    void SetFont (LPSTR fName, int fSize);
    void SetText (LPSTR newtext);
    LPSTR GetText ();

  private:
  const static int  EditWndStyle = WS_VISIBLE | WS_CHILD | WS_VSCROLL |
                                   WS_HSCROLL | ES_MULTILINE | ES_NOHIDESEL |
                                   ES_WANTRETURN | DS_CONTEXTHELP;

  // Window procedures
  WNDPROC RichWndProc;
  LRESULT CALLBACK EditWndProc (HWND hwnd, UINT msg, WPARAM wpar, LPARAM lpar);
};

#endif /* _CODEEDIT_H_ */

E che nessuno mi rubi questo codice!

[DanieleC88]

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