опубликован 16-08-2001 18:14 MSK            

#include "hooks.hpp"

HINSTANCE hInst;

HHOOK hCWPRHook;
HWND hExplWnd;
HWND hListWnd;
WNDPROC OldWndProc = NULL;

#define WM_HOOK_DONE WM_USER + 100

void DrawText(HWND hWnd)
{
HDC hDc = GetDC(hWnd);

TextOut(hDc,0,0,"Hello World",11);

ReleaseDC(hWnd,hDc);
}

void DrawItem(HWND hWnd,NMLVCUSTOMDRAW& lvcdr)
{
NMCUSTOMDRAW& cdr = (NMCUSTOMDRAW&)lvcdr;
RECT& Rect = cdr . rc;
HDC hDc = cdr . hdc;
int ItemIdx = cdr . dwItemSpec;

HIMAGELIST Images = ListView_GetImageList(hWnd,LVSIL_NORMAL);
LV_ITEM Item;
memset(&Item,0,sizeof(Item));

static char Buff[255];
Item . mask = LVIF_TEXT | LVIF_IMAGE | LVIF_STATE;
Item . pszText = Buff;
Item . cchTextMax = 255;
Item . iItem = ItemIdx;
Item . stateMask = 255;

ListView_GetItem(hWnd,&Item);
ListView_GetItemRect(hWnd,ItemIdx,&Rect,LVIR_ICON);
int cx,cy;
ImageList_GetIconSize(Images,&cx,&cy);
int dx = (Rect . right - Rect . left - cx) / 2;

ImageList_Draw(Images,Item . iImage,hDc,Rect . left + dx,Rect . top + 2,
ILD_NORMAL | ILD_TRANSPARENT);

ListView_GetItemRect(hWnd,ItemIdx,&Rect,LVIR_LABEL);

RedrawWindow(NULL,&Rect,0,RDW_ERASE | RDW_INVALIDATE | RDW_NOINTERNALPAINT |
RDW_NOFRAME | RDW_ERASENOW | RDW_NOCHILDREN);
SetBkMode(hDc,TRANSPARENT);
Rect . left ++;
Rect . top ++;
SetTextColor(hDc,lvcdr . clrTextBk);
DrawText(hDc,Buff,-1,&Rect,DT_NOPREFIX | DT_WORDBREAK | DT_CENTER);
Rect . left --;
Rect . top --;
SetTextColor(hDc,lvcdr . clrText);
DrawText(hDc,Buff,-1,&Rect,DT_NOPREFIX | DT_WORDBREAK | DT_CENTER);

// SelectObject(hDc,hOldPen);
}

LRESULT DoCustomDraw(NMLVCUSTOMDRAW& lvcdr)
{
LRESULT Result = CDRF_DODEFAULT;
NMCUSTOMDRAW& cdr = (NMCUSTOMDRAW&)lvcdr;

switch(cdr . dwDrawStage)
{
case CDDS_PREPAINT:
Result = CDRF_NOTIFYITEMDRAW;
break;
// case CDDS_PREERASE:
// Result = CDRF_NOTIFYITEMERASE;
// break;
case CDDS_ITEMPREPAINT:
// SetBkMode(cdr . hdc,TRANSPARENT);
// lvcdr . clrTextBk = RGB(255,255,255);
// lvcdr . clrText = RGB(255,0,0);
if(!cdr . uItemState)
{
DrawItem(cdr . hdr . hwndFrom,lvcdr);
Result = CDRF_SKIPDEFAULT;//CDRF_NEWFONT;
}
break;
// case CDDS_ITEMPREERASE:
// Result = CDRF_SKIPDEFAULT;
// break;
}

return Result;
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
LRESULT RetVal = 0;
PAINTSTRUCT ps;

switch(uMsg)
{
case WM_NOTIFY:
// BeginPaint(hWnd,&ps);
// EndPaint(hWnd,&ps);
// DrawText(hWnd);
{
NMHDR * Hdr = (NMHDR *)lParam;
if(Hdr -> code == NM_CUSTOMDRAW)
{
// RetVal = CallWindowProc(OldWndProc,hWnd,uMsg,wParam,lParam);
RetVal = DoCustomDraw(*((NMLVCUSTOMDRAW *)Hdr));
break;
}
else
RetVal = CallWindowProc(OldWndProc,hWnd,uMsg,wParam,lParam);
break;
}
case WM_HOOK_DONE:
SetWindowLong(hWnd,GWL_WNDPROC,(LONG)OldWndProc);
return 0;
default:
RetVal = CallWindowProc(OldWndProc,hWnd,uMsg,wParam,lParam);
}

// SetWindowLong(hWnd,GWL_WNDPROC,(LONG)WndProc);
return RetVal;
}

HWND FindDesktopWindow()
{
HWND hWnd = FindWindowEx(NULL,NULL,"Progman",NULL);
hWnd = FindWindowEx(hWnd,NULL,"SHELLDLL_DefView",NULL);
// hWnd = FindWindowEx(hWnd,NULL,"SysListView32",NULL);

return hWnd;
}

void InstallWndProc()
{
HWND hWnd = FindDesktopWindow();

OldWndProc = (WNDPROC)GetWindowLong(hWnd,GWL_WNDPROC);
SetWindowLong(hWnd,GWL_WNDPROC,(LONG)WndProc);
hExplWnd = hWnd;
}

LRESULT CALLBACK CWPRHookProc(int Code,WPARAM wParam,LPARAM lParam)
{
CWPRETSTRUCT * RetStruct = (CWPRETSTRUCT *)lParam;

// if(RetStruct -> message == WM_PAINT)// &&
// RetStruct -> hwnd == hExplWnd)
// DrawText(RetStruct -> hwnd);

if(!OldWndProc)
InstallWndProc();

CallNextHookEx(hCWPRHook,Code,wParam,lParam);
}

void InstallHook()
{
HWND hWnd = FindDesktopWindow();
OldWndProc = (WNDPROC)GetWindowLong(hWnd,GWL_WNDPROC);
hExplWnd = hWnd;

DWORD hThread = GetWindowThreadProcessId(hWnd,NULL);

hCWPRHook = SetWindowsHookEx(WH_CALLWNDPROCRET,CWPRHookProc,hInst,hThread);
}

void UnInstallHook()
{
// SetWindowLong(hExplWnd,GWL_WNDPROC,(LONG)OldWndProc);
SendMessage(hExplWnd,WM_HOOK_DONE,0,0);
UnhookWindowsHookEx(hCWPRHook);
}

int __export __stdcall DllEntryPoint(HINSTANCE _hInst,DWORD Reason,void *)
{
hInst = _hInst;

switch(Reason)
{
case DLL_PROCESS_ATTACH:
break;
case DLL_PROCESS_DETACH:
break;
case DLL_THREAD_ATTACH:
break;
case DLL_THREAD_DETACH:
break;
}