cant find sysmet.h in codeblocks win32gui

khadija520 (20)
i'm studying Charles Petzold book for windows api and there is a program having
#include "sysmets.h" but showing error what to do??
TarikNeaj (2580)
You sure it doesnt say "system.h"?

read below.
Last edited on
freddie1 (1838)
That is a custom header Charles made for several of his example programs. If you don't have the disk that came with the book, you can likely get the source files from Petzold's website. I'm fairly certain they are still available there somewhere. If not, I could post the missing file, but I'm a bit worried about copyright issues in doing that.
Ismael Vazquez (7)
http://www.charlespetzold.com/src/ProgWin5.zip

You can download the contents of the cd from that link. Thank you freddie1!
khadija520 (20)
will it work on code blocks?? or should i install visual c++
freddie1 (1838)
Last time I messed with Charles's scrolling code I used Code::Blocks. If I recall I had to place (char*) or (wchar_t*) or (TCHAR*) casts in front of all the string literals in that Sysmets.h file to kill compiler warnings something to the effect that conversion of character string literals to character string pointers is a deprecated behaviour. Which really gets me. In my opinion that's about the dumbest warning I ever saw. I've searched and searched for some way of turning that off, but to no avail. I wish someone would explain to me the value of it. But yea, it should work in Code::Blocks. If you get stuck I'll help.
khadija520 (20)
i installed visual c++ and thats working fine :) thankyou so much for helping
freddie1 (1838)
Here's something you might enjoy. If not, you'll know what to do with it.

I modified Petzold's scrolling program to not use that Sysmets.h file but rather to read in its own source Main.cpp file. So it scrolls that instead. So to get it to work you need to make sure you name this Main.cpp file exactly as "Main.cpp", and make sure its in the same directory as the exe file.

The other thing I modified in Petzold's source is that instead of using a switch() construct to map messages to the code that handles them, I use an elaborate function pointer setup. That will absolutely throw you, I guarantee it. But its really the best way to go. All class frameworks do this. Its just that the code is hidden and you never see it. It'll take two posts for me to post this as its a bit over 9K and 8492 bytes or something like that is the max for here...

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//Main.cpp;
#ifndef UNICODE
   #define UNICODE
#endif
#ifndef _UNICODE
   #define _UNICODE
#endif
#include <windows.h>
#include <string.h>
#include <cstdio>

#define dim(x) (sizeof(x) / sizeof(x[0]))

struct WndEventArgs
{
 HWND                         hWnd;
 WPARAM                       wParam;
 LPARAM                       lParam;
 HINSTANCE                    hIns;
};

long fnWndProc_OnCreate       (WndEventArgs& Wea);
long fnWndProc_OnSize         (WndEventArgs& Wea);
long fnWndProc_OnVScroll      (WndEventArgs& Wea);
long fnWndProc_OnHScroll      (WndEventArgs& Wea);
long fnWndProc_OnMouseWheel   (WndEventArgs& Wea);
long fnWndProc_OnPaint        (WndEventArgs& Wea);
long fnWndProc_OnDestroy      (WndEventArgs& Wea);

struct EVENTHANDLER
{
 unsigned int                 iMsg;
 long                         (*fnPtr)(WndEventArgs&);
};

const EVENTHANDLER EventHandler[]=
{
 {WM_CREATE,                  fnWndProc_OnCreate},
 {WM_SIZE,                    fnWndProc_OnSize},
 {WM_VSCROLL,                 fnWndProc_OnVScroll},
 {WM_HSCROLL,                 fnWndProc_OnHScroll},
 {WM_MOUSEWHEEL,              fnWndProc_OnMouseWheel},
 {WM_PAINT,                   fnWndProc_OnPaint},
 {WM_DESTROY,                 fnWndProc_OnDestroy}
};

struct ScrollData
{
 wchar_t**                    pPtrs;
 int                          iNumLines;
 int                          cxChar;
 int                          cxCaps;
 int                          cyChar;
 int                          cxClient;
 int                          cyClient;
 int                          iMaxWidth;
};


long fnWndProc_OnCreate(WndEventArgs& Wea)
{
 ScrollData* pScrDta=NULL;
 wchar_t szBuffer[512];
 wchar_t* cRet=NULL;
 HANDLE hHeap=NULL;
 HFONT hFont=NULL;
 FILE* fp1=NULL;
 TEXTMETRIC tm;
 int iLen=0,i;
 HDC hdc;

 hHeap=GetProcessHeap();
 pScrDta=(ScrollData*)HeapAlloc(hHeap,HEAP_ZERO_MEMORY,sizeof(ScrollData));
 if(!pScrDta)
    return -1;
 SetWindowLongPtr(Wea.hWnd,0,(LONG_PTR)pScrDta);
 hdc = GetDC(Wea.hWnd);
 hFont=CreateFont(-1*(11*GetDeviceCaps(hdc,LOGPIXELSY))/72,0,0,0,FW_SEMIBOLD,0,0,0,ANSI_CHARSET,0,0,DEFAULT_QUALITY,0,(wchar_t*)L"Lucida Console");
 if(!hFont)
    return -1;
 HFONT hTmp=(HFONT)SelectObject(hdc,hFont);
 GetTextMetrics(hdc, &tm);
 pScrDta->cxChar = tm.tmAveCharWidth;
 pScrDta->cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * pScrDta->cxChar / 2;
 pScrDta->cyChar = tm.tmHeight + tm.tmExternalLeading;
 DeleteObject(SelectObject(hdc,hTmp));
 ReleaseDC(Wea.hWnd, hdc);
 fp1=_wfopen(L"Main.cpp",L"r");
 if(fp1)
 {
    do
    {
      cRet=fgetws(szBuffer,512,fp1);
      if(!cRet)
         break;
      else
         pScrDta->iNumLines++;
    } while(1);
    rewind(fp1);
    if(pScrDta->iNumLines)
    {
       pScrDta->pPtrs=(wchar_t**)HeapAlloc(hHeap, HEAP_ZERO_MEMORY, sizeof(wchar_t*) * pScrDta->iNumLines);
       if(pScrDta->pPtrs)
       {
          for(i=0; i<pScrDta->iNumLines; i++)
          {
              fgetws(szBuffer,512,fp1);
              iLen=wcslen(szBuffer);
              if(iLen>pScrDta->iMaxWidth)
                 pScrDta->iMaxWidth=iLen;
              pScrDta->pPtrs[i]=(wchar_t*)HeapAlloc(hHeap,HEAP_ZERO_MEMORY, sizeof(wchar_t)*iLen+1*sizeof(wchar_t));
              wcscpy(pScrDta->pPtrs[i],szBuffer);
          }
          pScrDta->iMaxWidth=pScrDta->iMaxWidth*pScrDta->cxChar;
       }
    }
    fclose(fp1);
 }

 return 0;
}


continued...
Last edited on
freddie1 (1838)
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long fnWndProc_OnSize(WndEventArgs& Wea)
{
 ScrollData* pScrDta=NULL;
 SCROLLINFO si;

 pScrDta=(ScrollData*)GetWindowLongPtr(Wea.hWnd,0);
 if(pScrDta)
 {
    pScrDta->cxClient = LOWORD(Wea.lParam);
    pScrDta->cyClient = HIWORD(Wea.lParam);
    si.cbSize = sizeof(si) ;
    si.fMask  = SIF_RANGE | SIF_PAGE;
    si.nMin   = 0;
    si.nMax   = pScrDta->iNumLines - 1;
    si.nPage  = pScrDta->cyClient / pScrDta->cyChar;
    SetScrollInfo(Wea.hWnd, SB_VERT, &si, TRUE);
    si.cbSize = sizeof(si);
    si.fMask  = SIF_RANGE | SIF_PAGE;
    si.nMin   = 0;
    si.nMax   = pScrDta->iMaxWidth / pScrDta->cxChar;
    si.nPage  = pScrDta->cxClient / pScrDta->cxChar;
    SetScrollInfo(Wea.hWnd, SB_HORZ, &si, TRUE);
 }

 return 0;
}


long fnWndProc_OnVScroll(WndEventArgs& Wea)
{
 ScrollData* pScrDta=NULL;
 SCROLLINFO si;

 pScrDta=(ScrollData*)GetWindowLongPtr(Wea.hWnd,0);
 if(pScrDta)
 {
    si.cbSize = sizeof(si) ;// Get all the vertial scroll bar information
    si.fMask  = SIF_ALL ;
    GetScrollInfo(Wea.hWnd, SB_VERT, &si);
    int iVertPos = si.nPos; // Save the position for comparison later on
    switch (LOWORD(Wea.wParam))
    {
      case SB_TOP:
           si.nPos = si.nMin ;
           break ;
      case SB_BOTTOM:
           si.nPos = si.nMax ;
           break ;
      case SB_LINEUP:
           si.nPos -= 1 ;
           break ;
      case SB_LINEDOWN:
           si.nPos += 1 ;
           break ;
      case SB_PAGEUP:
           si.nPos -= si.nPage ;
           break ;
      case SB_PAGEDOWN:
           si.nPos += si.nPage ;
           break ;
      case SB_THUMBTRACK:
           si.nPos = si.nTrackPos ;
           break ;
      default:
           break ;
    }
    si.fMask = SIF_POS ;
    SetScrollInfo(Wea.hWnd, SB_VERT, &si, TRUE);
    GetScrollInfo(Wea.hWnd, SB_VERT, &si);
    if(si.nPos != iVertPos)
    {
       ScrollWindow(Wea.hWnd, 0, pScrDta->cyChar*(iVertPos-si.nPos), NULL, NULL);
       UpdateWindow(Wea.hWnd);
    }
 }

 return 0;
}


long fnWndProc_OnHScroll(WndEventArgs& Wea)
{
 ScrollData* pScrDta=NULL;
 SCROLLINFO si;

 pScrDta=(ScrollData*)GetWindowLongPtr(Wea.hWnd,0);
 if(pScrDta)
 {
    si.cbSize = sizeof (si);// Get all the horizontal scroll bar information
    si.fMask  = SIF_ALL;
    GetScrollInfo(Wea.hWnd, SB_HORZ, &si) ;// Save the position for comparison later on
    int iHorzPos = si.nPos;
    switch (LOWORD(Wea.wParam))
    {
      case SB_LINELEFT:
           si.nPos -= 1 ;
           break ;
      case SB_LINERIGHT:
           si.nPos += 1 ;
           break ;
      case SB_PAGELEFT:
           si.nPos -= si.nPage ;
           break ;
      case SB_PAGERIGHT:
           si.nPos += si.nPage ;
           break ;
      case SB_THUMBTRACK:              // case SB_THUMBPOSITION:
           si.nPos = si.nTrackPos ;
           break ;
      default :
           break ;
    }
    si.fMask = SIF_POS;
    SetScrollInfo(Wea.hWnd, SB_HORZ, &si, TRUE);
    GetScrollInfo(Wea.hWnd, SB_HORZ, &si);
    if(si.nPos != iHorzPos)
       ScrollWindow(Wea.hWnd, pScrDta->cxChar*(iHorzPos-si.nPos), 0, NULL, NULL);
 }

 return 0;
}


long fnWndProc_OnPaint(WndEventArgs& Wea)
{
 int x,y,iPaintBeg,iPaintEnd,iVertPos,iHorzPos;
 ScrollData* pScrDta=NULL;
 HFONT hFont=NULL;
 PAINTSTRUCT ps;
 SCROLLINFO si;
 HDC hdc;

 hdc = BeginPaint(Wea.hWnd, &ps);
 pScrDta=(ScrollData*)GetWindowLongPtr(Wea.hWnd,0);
 if(pScrDta)
 {
    hFont=CreateFont(-1*(11*GetDeviceCaps(hdc,LOGPIXELSY))/72,0,0,0,FW_SEMIBOLD,0,0,0,ANSI_CHARSET,0,0,DEFAULT_QUALITY,0,(wchar_t*)L"Lucida Console");
    HFONT hTmp=(HFONT)SelectObject(hdc,hFont);
    si.cbSize = sizeof (si) ;// Get vertical scroll bar position
    si.fMask  = SIF_POS ;
    GetScrollInfo(Wea.hWnd, SB_VERT, &si), iVertPos = si.nPos;
    GetScrollInfo(Wea.hWnd, SB_HORZ, &si), iHorzPos = si.nPos;
    if(iVertPos+ps.rcPaint.top/pScrDta->cyChar>0)
       iPaintBeg=iVertPos + ps.rcPaint.top / pScrDta->cyChar;
    else
       iPaintBeg=0;
    if(iVertPos + ps.rcPaint.bottom / pScrDta->cyChar < pScrDta->iNumLines - 1)
       iPaintEnd=iVertPos + ps.rcPaint.bottom / pScrDta->cyChar;
    else
       iPaintEnd=pScrDta->iNumLines-1;
    for(int i = iPaintBeg; i<= iPaintEnd; i++)
    {
        x = pScrDta->cxChar * (1 - iHorzPos);
        y = pScrDta->cyChar * (i - iVertPos);
        TextOut(hdc, x, y, pScrDta->pPtrs[i], wcslen(pScrDta->pPtrs[i]));
    }
    DeleteObject(SelectObject(hdc,hTmp));
 }
 EndPaint(Wea.hWnd, &ps);

 return 0;
}


long fnWndProc_OnMouseWheel(WndEventArgs& Wea)
{
 int zdelta=GET_WHEEL_DELTA_WPARAM(Wea.wParam);
 if(zdelta>0)
 {
    for(int i=0; i<10; i++)
        SendMessage(Wea.hWnd,WM_VSCROLL,MAKEWPARAM(SB_LINEUP,0),0);
 }
 else
 {
    for(int i=0; i<10; i++)
        SendMessage(Wea.hWnd,WM_VSCROLL,MAKEWPARAM(SB_LINEDOWN,0),0);
 }

 return 0;
}


long fnWndProc_OnDestroy(WndEventArgs& Wea)
{
 ScrollData* pScrDta=NULL;
 HANDLE hHeap=NULL;

 hHeap=GetProcessHeap();
 pScrDta=(ScrollData*)GetWindowLongPtr(Wea.hWnd,0);
 if(pScrDta->pPtrs)
 {
    for(int i=0; i<pScrDta->iNumLines; i++)
        HeapFree(hHeap,0,pScrDta->pPtrs[i]);
    HeapFree(hHeap,0,pScrDta->pPtrs);
 }
 PostQuitMessage(0);

 return 0;
}


LRESULT CALLBACK fnWndProc(HWND hwnd, unsigned int msg, WPARAM wParam, LPARAM lParam)
{
 WndEventArgs Wea;

 for(unsigned int i=0; i<dim(EventHandler); i++)
 {
     if(EventHandler[i].iMsg==msg)
     {
        Wea.hWnd=hwnd, Wea.lParam=lParam, Wea.wParam=wParam;
        return (*EventHandler[i].fnPtr)(Wea);
     }
 }

 return (DefWindowProc(hwnd, msg, wParam, lParam));
}


int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevIns, LPSTR lpszArgument, int iShow)
{
 wchar_t szClassName[]=L"SysMets3";
 WNDCLASSEX wc;
 MSG messages;
 HWND hWnd;

 wc.lpszClassName = szClassName,                          wc.lpfnWndProc = fnWndProc;
 wc.cbSize        = sizeof(WNDCLASSEX),                   wc.style       = CS_HREDRAW | CS_VREDRAW;
 wc.hIcon         = LoadIcon(NULL,IDI_APPLICATION),       wc.hIconSm     = NULL;
 wc.hInstance     = hInstance,                            wc.hCursor     = LoadCursor(NULL,IDC_ARROW);
 wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH),  wc.cbWndExtra  = sizeof(void*);
 wc.lpszMenuName  = NULL,                                 wc.cbClsExtra  = 0;
 RegisterClassEx(&wc);
 hWnd=CreateWindowEx(0,szClassName,szClassName,WS_OVERLAPPEDWINDOW,75,75,820,805,HWND_DESKTOP,0,hInstance,0);
 ShowWindow(hWnd,iShow);
 while(GetMessage(&messages,NULL,0,0))
 {
    TranslateMessage(&messages);
    DispatchMessage(&messages);
 }

 return messages.wParam;
}


Should work as is in VStudio or CodeBlks in either x86 or x64. Using MinGW 4.8 series x64 compiler I'm getting only a 20K or so executable, which is pretty decent.
Last edited on
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