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-
- // VMEM.C - Copyright (c) 1992 M.B.Mallory
- // Compiler: IBM C Set/2 1.0
-
- // VMEM displays the amount of virtual memory available to the user
- // in the smallest window possible... a title bar. VMEM can run along
- // the edge of the screen (or under it's own icon) with no loss of
- // screen real estate.
-
- #define INCL_WIN
- #define INCL_GPIPRIMITIVES
- #define INCL_DOSMISC
-
- #include <os2.h>
- #include <string.h>
- #include "vmem.h"
-
- #define CMD (COMMANDMSG(&msg)->cmd)
-
- // data structure and profile info to be written to OS2.INI
- typedef struct
- {
- POINTL pt;
- SHORT savescrpos;
- SHORT format;
- } INIINFO;
-
- #define MEM_APP "VMEM"
- #define MEM_KEY "OptionsData"
-
- // define items to remove from the System menu
- #define MIR_COUNT 5
- #define MIR_DATA SC_RESTORE, SC_SIZE, SC_HIDE, SC_MINIMIZE, SC_MAXIMIZE
-
- // define additions to the System menu
- #define MI_COUNT 4
- #define IDM_ABOUT 88
- #define IDM_OPTIONS 89
- #define MI_STR 0, 0, "~About VMEM", "VMEM ~Options"
- #define MI_DATA MIT_END, MIS_SEPARATOR, 0, 0, 0, 0,\
- MIT_END, MIS_SEPARATOR, 0, 0, 0, 0,\
- MIT_END, MIS_TEXT, 0, IDM_ABOUT, 0, 0,\
- MIT_END, MIS_TEXT, 0, IDM_OPTIONS, 0, 0
-
- // initial title bar text
- #define TITLEBAR_TEXT "Virtual Memory"
-
- // no timers error message
- #define TIMER_TITLE "Error initializing VMEM"
- #define TIMER_TEXT "VMEM cannot be initialized because"\
- " too many timers are already running."\
- " Close some applications to free system resources."
-
- // prototype for revectored (subclassed) system frame procedure
- MRESULT (* EXPENTRY DefaultFrameProc) (HWND, ULONG, MPARAM, MPARAM);
-
- // prototypes for new frame & dialog procedures
- MRESULT EXPENTRY NewFrameProc (HWND, ULONG, MPARAM, MPARAM);
- MRESULT EXPENTRY AboutProc (HWND, ULONG, MPARAM, MPARAM);
- MRESULT EXPENTRY OptionsProc (HWND, ULONG, MPARAM, MPARAM);
- MRESULT EXPENTRY HelpProc (HWND, ULONG, MPARAM, MPARAM);
-
- // misc. prototypes
- VOID ReviseSystemMenu (VOID);
- VOID SetFramePosition (PRECTL);
- LONG GetMemAvail (VOID);
- BOOL GetIniInfo (VOID);
- CHAR * _System ULongToString (LONG number, LONG width, LONG dec_places);
- void _setuparg (void);
-
- // globals
- HWND hwndFrame, hwndTitleBar;
- INIINFO ini;
- BOOL bRestoreFlag = FALSE;
- LONG lPrevMemAvail;
-
- // declare dummy function to eliminate command line parsing
- void _setuparg (void)
- {}
-
- int main (void)
- {
- HAB hab;
- HMQ hmq;
- QMSG qmsg;
- RECTL rect;
-
- FRAMECDATA framecdata = {
- sizeof framecdata,
- FCF_TITLEBAR | FCF_SYSMENU | FCF_TASKLIST | FCF_ICON | FCF_BORDER,
- 0,
- VMEM_ICON };
-
- hab = WinInitialize (0); // create anchor block
- hmq = WinCreateMsgQueue (hab, 0); // create message queue
-
- // initialize handle & create frame window
- hwndFrame = WinCreateWindow (
- HWND_DESKTOP, // window parent
- WC_FRAME, // frame window class
- TITLEBAR_TEXT, // window text
- 0, // frame creation style (invisible)
- 0,0, // x, y position
- 0,0, // width, height
- 0, // owner window
- HWND_TOP, // top of z-order
- ID_FRAME, // frame window ID
- &framecdata, // control data
- 0); // presentation parameters
-
- // initialize handle to title bar
- hwndTitleBar = WinWindowFromID (hwndFrame, FID_TITLEBAR);
-
- // hook the vector to this instance of the system frame procedure
- DefaultFrameProc = WinSubclassWindow (hwndFrame, (PFNWP) NewFrameProc);
-
- ReviseSystemMenu (); // delete disabled stuff & add new items
-
- SetFramePosition (&rect); // initial window frame position
-
- WinSetWindowPos (hwndFrame, HWND_TOP, rect.xLeft, rect.yBottom,
- rect.xRight, rect.yTop + 1, SWP_SIZE | SWP_MOVE | SWP_SHOW);
-
- if (WinStartTimer (hab, hwndFrame, ID_TIMER, 1000))
- // enter message loop
- {
- while (WinGetMsg (hab, &qmsg, 0, 0, 0))
- WinDispatchMsg (hab, &qmsg);
-
- WinStopTimer (hab, hwndFrame, ID_TIMER);
- }
-
- else // display error message
- WinMessageBox (HWND_DESKTOP, hwndFrame, TIMER_TEXT, TIMER_TITLE, 0,
- MB_OK | MB_WARNING | MB_MOVEABLE );
-
- // destroy window frame and exit
- WinDestroyWindow (hwndFrame);
- WinDestroyMsgQueue (hmq);
- WinTerminate (hab);
- return 0;
- }
-
-
- VOID ReviseSystemMenu (VOID)
- {
- HWND hwndSysMenu;
- MENUITEM miSysMenu;
- SHORT sSysMenu, i;
- static PCHAR pItemIns[MI_COUNT] = { MI_STR };
- static SHORT sItemDel[MIR_COUNT] = { MIR_DATA };
- static MENUITEM mi[MI_COUNT] = { MI_DATA };
-
- // get handle of the system menu
- hwndSysMenu = WinWindowFromID (hwndFrame, FID_SYSMENU);
-
- // get ID of the system menu bitmap
- sSysMenu = SHORT1FROMMR (
- WinSendMsg (hwndSysMenu, MM_ITEMIDFROMPOSITION, 0, 0));
-
- // get handle of system submenu (in miSysMenu structure)
- WinSendMsg (hwndSysMenu, MM_QUERYITEM,
- MPFROM2SHORT (sSysMenu, FALSE), MPFROMP (&miSysMenu));
-
- // remove disabled and unneeded menu items
- for (i = 0; i < MIR_COUNT; i++)
- WinSendMsg (miSysMenu.hwndSubMenu, MM_REMOVEITEM,
- MPFROM2SHORT (sItemDel[i], FALSE), 0);
-
- // insert new menu items
- for (i = 0; i < MI_COUNT; i++)
- WinSendMsg (miSysMenu.hwndSubMenu, MM_INSERTITEM,
- MPFROMP (mi + i), MPFROMP (pItemIns[i]));
- }
-
-
- LONG GetMemAvail (VOID)
- {
- LONG X;
- DosQuerySysInfo (19, 19, &X, sizeof X); // get available virtual memory
- return X;
- }
-
-
- BOOL GetIniInfo (VOID) // get data from OS2.INI, if it exists
- {
- ULONG length = sizeof ini;
- HINI hini = HINI_USERPROFILE;
- BOOL rval;
- rval = PrfQueryProfileData (hini, MEM_APP, MEM_KEY, &ini, &length);
- if (!rval)
- {
- ini.savescrpos = TRUE; // set defaults
- ini.format = ARB_DISPLAYMB;
- }
- return rval;
- }
-
-
- VOID SetFramePosition (PRECTL prect)
- {
- CHAR pPtr[30];
- HPS hps ;
- POINTL apt[TXTBOX_COUNT];
- SHORT xMax, yMax;
-
- // produce initial string
- strcpy (pPtr, ULongToString (GetMemAvail () / ONE_KB, 0, 0));
- strcat (pPtr, " K available ");
-
- // get length of text string
- hps = WinGetPS (hwndFrame);
- GpiQueryTextBox (hps, strlen (pPtr), pPtr, TXTBOX_COUNT, apt);
- WinReleasePS (hps);
-
- // put text length + room for system menu into RECTL
- prect->xLeft = prect->yBottom = prect->yTop = 0;
- prect->xRight = (apt[2].x - apt[0].x) + (apt[0].y - apt[1].y);
-
- // expand text string to frame coordinates
- WinCalcFrameRect (hwndFrame, prect, FALSE);
-
- // get current absolute screen size
- xMax = WinQuerySysValue (HWND_DESKTOP, SV_CXSCREEN);
- yMax = WinQuerySysValue (HWND_DESKTOP, SV_CYSCREEN);
-
- if (GetIniInfo ())
- {
- // set window position to OS2.INI data
- prect->xLeft = ini.pt.x;
- prect->yBottom = ini.pt.y;
-
- // logic to ensure window displays on current screen size
- if ((prect->xLeft + prect->xRight / 2 - 3) > xMax)
- prect->xLeft = xMax - prect->xRight / 2 + 3;
- if (prect->xLeft + 3 < 0)
- prect->xLeft = -3;
- if ((prect->yBottom + prect->yTop - 3) > yMax)
- prect->yBottom = yMax - prect->yTop + 3;
- if (prect->yBottom + 3 < 0)
- prect->yBottom = -3;
- }
- else
- {
- // set window position to center of screen (default)
- prect->xLeft = (xMax - prect->xRight) / 2;
- prect->yBottom = (yMax - prect->yTop) / 2;
- }
-
- // set INIINFO structure to current values
- ini.pt.x = prect->xLeft;
- ini.pt.y = prect->yBottom;
- }
-
-
- MRESULT EXPENTRY
- NewFrameProc (HWND hwnd, ULONG msg, MPARAM mp1, MPARAM mp2)
- {
- CHAR pTempText[40];
- HINI hini = HINI_USERPROFILE;
- POINTL pt;
- LONG lTemp, lMemAvail;
- MRESULT rc;
-
- switch (msg)
- {
- case WM_TIMER:
- lMemAvail = GetMemAvail ();
- if (lMemAvail != lPrevMemAvail)
- {
- if (lMemAvail > 0)
- {
- if (ini.format == ARB_DISPLAYMB)
- {
- lTemp = lMemAvail / TENTH_MB;
- if (lMemAvail % TENTH_MB > TENTH_MB / 2)
- lTemp++;
- strcpy (pTempText, ULongToString (lTemp, 0, 1));
- strcat (pTempText, " MB available");
- }
- else
- {
- lTemp = lMemAvail / ONE_KB;
- strcpy (pTempText, ULongToString (lTemp, 0, 0));
- strcat (pTempText, " K available");
- }
- }
- else
- strcpy (pTempText, "Memory Depleted.") ;
-
- WinSetWindowText (hwndFrame, pTempText);
- lPrevMemAvail = lMemAvail;
- }
- return 0 ;
-
- case WM_PAINT:
- case WM_ACTIVATE:
- // set title bar hilite to always ON
- rc = DefaultFrameProc (hwnd, msg, mp1, mp2);
- WinSendMsg (hwndTitleBar, TBM_SETHILITE, (MPARAM) TRUE, 0);
- return rc;
-
- case WM_COMMAND:
- switch (CMD)
- {
- case IDM_ABOUT: // open About dialog box
- WinDlgBox (HWND_DESKTOP, hwnd,
- (PFNWP) AboutProc, 0, IDD_ABOUT, 0);
- return 0;
-
- case IDM_OPTIONS: // open Options dialog box
- WinDlgBox (HWND_DESKTOP, hwnd,
- (PFNWP) OptionsProc, 0, IDD_OPTIONS, 0);
- return 0;
- }
- break;
-
- case WM_BUTTON2DBLCLK:
- // activate options dialog box with double-click of mouse
- // button 2 on the title bar
- WinDlgBox (HWND_DESKTOP, hwnd,
- (PFNWP) OptionsProc, 0, IDD_OPTIONS, 0);
- return 0;
-
- case WM_DESTROY:
- if (bRestoreFlag)
- // delete data from OS2.INI
- PrfWriteProfileData (hini, MEM_APP, 0, 0, 0);
- else
- {
- if (ini.savescrpos)
- {
- // get current screen position
- pt.x = pt.y = 0;
- WinMapWindowPoints (hwndFrame, HWND_DESKTOP, &pt, 1);
- ini.pt.x = pt.x;
- ini.pt.y = pt.y;
- }
-
- // write current settings to OS2.INI
- PrfWriteProfileData (hini, MEM_APP, MEM_KEY,
- &ini, (ULONG)sizeof ini);
- }
- }
- return DefaultFrameProc (hwnd, msg, mp1, mp2);
- }
-
-
- MRESULT EXPENTRY
- AboutProc (HWND hwnd, ULONG msg, MPARAM mp1, MPARAM mp2)
- {
- if (msg == WM_COMMAND)
- if (CMD == DID_OK || CMD == DID_CANCEL)
- {
- WinDismissDlg (hwnd, TRUE);
- return 0;
- }
- return WinDefDlgProc (hwnd, msg, mp1, mp2);
- }
-
-
- MRESULT EXPENTRY
- HelpProc (HWND hwnd, ULONG msg, MPARAM mp1, MPARAM mp2)
- {
- if (msg == WM_COMMAND)
- if (CMD == DID_OK || CMD == DID_CANCEL)
- {
- WinDismissDlg (hwnd, TRUE);
- return 0;
- }
- return WinDefDlgProc (hwnd, msg, mp1, mp2);
- }
-
-
- MRESULT EXPENTRY
- OptionsProc (HWND hwnd, ULONG msg, MPARAM mp1, MPARAM mp2)
- {
- SHORT sTemp;
-
- if (msg == WM_CONTROL)
- {
- switch (SHORT1FROMMP (mp1)) // get settings as they are changed
- {
- case ACB_SAVESCRPOS:
- if (!bRestoreFlag)
- {
- ini.savescrpos ^= TRUE; // toggle flag
- WinSendDlgItemMsg (hwnd, ACB_SAVESCRPOS, BM_SETCHECK,
- (MPARAM) ini.savescrpos, 0);
- }
- return 0;
-
- case ACB_RESTORE:
- bRestoreFlag ^= TRUE; // toggle flag
- if (bRestoreFlag)
- WinSendDlgItemMsg (hwnd, ACB_SAVESCRPOS, BM_SETCHECK,
- (MPARAM) CB_3RDSTATE, 0);
- else
- WinSendDlgItemMsg (hwnd, ACB_SAVESCRPOS, BM_SETCHECK,
- (MPARAM) ini.savescrpos, 0);
- return 0;
-
- case ARB_DISPLAYMB:
- case ARB_DISPLAYKB:
- ini.format = SHORT1FROMMP (mp1);
- lPrevMemAvail = 0; // force data update
- WinSendMsg (hwndFrame, WM_TIMER, 0, 0);
- return 0;
- }
- }
-
- if (msg == WM_COMMAND)
- {
- switch (CMD)
- {
- case DID_OK: // close dialog box
- case DID_CANCEL:
- WinDismissDlg (hwnd, TRUE);
- return 0;
-
- case DID_ABOUT:
- WinDlgBox (HWND_DESKTOP, hwnd,
- (PFNWP) AboutProc, 0, IDD_ABOUT, 0);
- return 0;
-
- case DID_HELP:
- WinDlgBox (HWND_DESKTOP, hwnd,
- (PFNWP) HelpProc, 0, IDD_HELP, 0);
- return 0;
- }
- }
-
- if (msg == WM_INITDLG)
- {
- sTemp = bRestoreFlag ? CB_3RDSTATE : ini.savescrpos;
-
- // send current settings to Options dialog
- WinCheckButton (hwnd, ini.format, BM_SETCHECK);
- WinSendDlgItemMsg (hwnd, ACB_SAVESCRPOS, BM_SETCHECK,
- MPFROM2SHORT (sTemp, 0), 0);
- WinSendDlgItemMsg (hwnd, ACB_RESTORE, BM_SETCHECK,
- (MPARAM) bRestoreFlag, 0);
- return 0;
- }
-
- return WinDefDlgProc (hwnd, msg, mp1, mp2);
- }
-
-
-