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OS/2 Shareware BBS: 10 Tools
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QUEUES
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SVRQMAIN.C
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C/C++ Source or Header
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1994-11-17
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15KB
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497 lines
/*==============================================================*\
* Svrqmain.c - Queue Server sample app
* Copyright 1992 IBM Corp.
*--------------------------------------------------------------
*
* DISCLAIMER OF WARRANTIES. The following [enclosed] code is
* sample code created by IBM Corporation. This sample code is not
* part of any standard or IBM product and is provided to you solely
* for the purpose of assisting you in the development of your
* applications. The code is provided "AS IS", without
* warranty of any kind. IBM shall not be liable for any damages
* arising out of your use of the sample code, even if they have been
* advised of the possibility of such damages.
*
*--------------------------------------------------------------
*
* This c file contains the window creation routines and
* manages the PM message queue.
*
\*==============================================================*/
/*--------------------------------------------------------------*\
* Include files, macros, defined constants, and externs
\*--------------------------------------------------------------*/
#define INCL_WINHELP
#define INCL_WININPUT
#define INCL_DOSPROCESS
#define INCL_DOSQUEUES
#define INCL_WINMESSAGEMGR
#define INCL_WINWINDOWMGR
#define INCL_WINMENUS
#define INCL_WINFRAMEMGR
#include <os2.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "svrqmain.h"
#include "svrqhelp.h"
#include "svrqxtrn.h"
#define THRD_EXIT_TIMEOUT 10
/*--------------------------------------------------------------*\
* Global variables
\*--------------------------------------------------------------*/
HWND hwndMainFrame = NULLHANDLE; /* handle to the main frame window */
HWND hwndMain; /* handle to the main client window */
HAB hab; /* anchor block for the process */
HMQ hmq; /* handle to the process' message queue */
CHAR szAppName[MAXNAMEL]; /* buffer for application name string */
CHAR szUntitled[TITLE_LEN]; /* buffer for "Untitled" string */
BOOL fHelpEnabled; /* flag to determine if help is enabled */
HQUEUE hqQ;
SHORT sTotalMsgs;
CHAR SvrQMsgs[MAX_MESSAGES][MESSAGE_LEN+38];
BOOL fThrdsDead=FALSE; /* notification of thread exitting */
unsigned int iIndex=0; /* beginning of circular buffer */
/****************************************************************\
* Main routine
*--------------------------------------------------------------
*
* Name: main()
*
* Purpose: Initializes the PM environment, calls the
* initialization routine, creates the main
* window, and polls the message queue
*
* Usage:
*
* Method:
* - obtains anchor block handle and creates message
* queue
* - calls the initialization routine
* - creates the main frame window which creates the
* main client window
* - polls the message queue via Get/Dispatch Msg loop
* - upon exiting the loop, exits
*
* Returns:
* 0 - if successful execution completed
* 1 - if error
\****************************************************************/
INT main(int argc, char *argv[])
{
QMSG qmsg; /* message structure */
static int iTimeOut=THRD_EXIT_TIMEOUT;
hab = WinInitialize(0);
if(!hab)
{
DosBeep(BEEP_WARN_FREQ, BEEP_WARN_DUR);
return(RETURN_ERROR);
}
hmq = WinCreateMsgQueue(hab, 0);
if(!hmq)
{
DosBeep(BEEP_WARN_FREQ, BEEP_WARN_DUR);
WinTerminate(hab);
return(RETURN_ERROR);
}
if(!Init(argc, argv))
{
if(hwndMainFrame == NULLHANDLE)
{
MessageBox(HWND_DESKTOP,
IDMSG_MAINWINCREATEFAILED,
MB_OK | MB_ERROR,
TRUE);
}
else
{
MessageBox(HWND_DESKTOP,
IDMSG_INITFAILED,
MB_OK | MB_ERROR,
TRUE);
}
DosBeep(BEEP_WARN_FREQ, BEEP_WARN_DUR);
if (WinIsWindow(hab, hwndMainFrame))
{
WinDestroyWindow(hwndMainFrame);
}
WinDestroyMsgQueue(hmq);
WinTerminate(hab);
return(RETURN_ERROR);
}
/* Get-Dispatch Message loop */
while(WinGetMsg(hab, (PQMSG)&qmsg, NULLHANDLE, 0, 0))
WinDispatchMsg(hab, (PQMSG)&qmsg);
/* destroy the help instance */
DestroyHelpInstance();
if (WinIsWindow(hab, hwndMainFrame))
WinDestroyWindow(hwndMainFrame);
WinDestroyMsgQueue(hmq);
/* give other thread a chance to exit */
while (!fThrdsDead && iTimeOut--)
{
DosSleep(0);
}
WinTerminate(hab);
return(RETURN_SUCCESS);
} /* main() */
/****************************************************************\
* Main client window procedure
*--------------------------------------------------------------
*
* Name: MainWndProc(hwnd, msg, mp1, mp2)
*
* Purpose: Processes the messages sent to the main client
* window. This routine processes the basic
* messages all client windows should process
* and passes all others onto WinDefWindowProc.
*
* Usage: Called for each message placed in the main
* window's message queue
*
* Method: a switch statement branches to the routines to be
* performed for each message processed.
*
* Returns: Return values are determined by each message
*
\****************************************************************/
MRESULT EXPENTRY MainWndProc(HWND hwnd, /* handle of window */
ULONG msg, /* id of message */
MPARAM mp1, /* first message parameter */
MPARAM mp2) /* second message parameter */
{
QDATA *pqdataQ;
switch(msg)
{
case WM_CREATE:
return(InitMainWindow(hwnd, mp1, mp2));
break;
case WM_PAINT:
MainPaint(hwnd, SvrQMsgs, iIndex, sTotalMsgs);
break;
case WM_SIZE:
MainSize(hwnd, sTotalMsgs, mp1, mp2);
break;
case WM_HSCROLL:
MainHorizScroll(hwnd, mp2);
break;
case WM_VSCROLL:
MainVertScroll(hwnd, mp2);
break;
case WM_CHAR:
switch (SHORT2FROMMP(mp2))
{
case VK_LEFT:
case VK_RIGHT:
return MainCharHScroll (hwnd, msg, mp1, mp2) ;
case VK_UP:
case VK_DOWN:
case VK_PAGEUP:
case VK_PAGEDOWN:
return MainCharVScroll (hwnd, msg, mp1, mp2) ;
}
break ;
case WM_COMMAND:
MainCommand(mp1, mp2);
break;
case HM_QUERY_KEYS_HELP:
return (MRESULT)PANEL_HELPKEYS; /* return id of key help panel */
break ;
case WM_NEWQMSG:
/* copy message into circular array, with index being next free spot in array */
pqdataQ = (QDATA *)PVOIDFROMMP(mp1);
sprintf(SvrQMsgs[iIndex],
"Process ID: %03lu, Priority: %02hu, Message: %s",
pqdataQ->pidProcess,
pqdataQ->usPriority,
pqdataQ->pszMsg);
/* increment index, or reset to 0 as appropriate */
iIndex = (iIndex < MAX_MESSAGES-1) ? iIndex+1 : 0;
/* increment total message count until buffer is filled */
sTotalMsgs = min(MAX_MESSAGES, sTotalMsgs+1);
MainUpdateMsg(hwnd, SvrQMsgs, iIndex, sTotalMsgs);
break;
case WM_MSG:
MessageBox(hwndMain, (ULONG)SHORT1FROMMP(mp1), MB_OK | MB_ICONEXCLAMATION | MB_APPLMODAL, TRUE);
break;
case WM_CLOSE:
DosWriteQueue(hqQ, WM_CLOSE, 0, NULL, 15);
/* process the WM_CLOSE */
/*--------------------------------------------------*\
* Any messages not processed are passed on
* to WinDefWindowProc.
\*--------------------------------------------------*/
default:
return(WinDefWindowProc(hwnd, msg, mp1, mp2));
break;
}
return (MRFROMLONG(0)); /* all window procedures should return 0 as a default */
} /* MainWndProc() */
/****************************************************************\
* Message Box procedure
*--------------------------------------------------------------
*
* Name: MessageBox(hwndOwner, nIdMsg, fsStyle, fBeep)
*
* Purpose: Displays the message box with the message
* given in idMsg retrieved from the message table
* and using the style flags in fsStyle
*
* Usage: Called whenever a MessageBox is to be displayed
*
* Method: - Message string is loaded from the process'
* message table
* - Alarm beep is sounded if desired
* - Message box with the message is displayed
* - WinMessageBox return value is returned
*
* Returns: return value from WinMessageBox()
*
\****************************************************************/
ULONG MessageBox(HWND hwndOwner, /* handle of the message box's owner */
ULONG idMsg, /* id if the message in the message table */
ULONG fsStyle, /* style of the message box */
BOOL fBeep) /* if TRUE, beep before message box is displayed */
{
CHAR szText[TITLE_LEN];
if(!WinLoadMessage(hab,
(HMODULE)NULL,
idMsg,
TITLE_LEN,
(PSZ)szText))
{
WinAlarm(HWND_DESKTOP, WA_ERROR);
return MBID_ERROR;
}
if(fBeep) {
WinAlarm(HWND_DESKTOP, WA_ERROR);
}
return(WinMessageBox(HWND_DESKTOP,
hwndOwner,
szText,
(PSZ)NULL,
MSGBOXID,
fsStyle));
} /* MessageBox() */
/****************************************************************\
* Main window WM_COMMAND processing procedure
*--------------------------------------------------------------
*
* Name: MainCommand(mp1, mp2)
*
* Purpose: Calls the appropriate procedures that deal with
* the selected menu item.
*
* Usage: Routine is called whenever a WM_COMMAND message
* is posted to the main window.
*
* Method: a switch statement branches on the id of the
* menu item that posted the message and the
* appropriate action for that item is taken.
*
* Returns:
*
\****************************************************************/
VOID MainCommand(MPARAM mp1, MPARAM mp2)
{
switch(SHORT1FROMMP(mp1))
{
case IDM_FILEEXIT:
FileExit();
break;
case IDM_OPTIONPURGE:
iIndex = sTotalMsgs = 0;
/* get memory thread, write priority 15 message to tell thread to purge Q */
DosWriteQueue(hqQ, IDM_OPTIONPURGE, 0, NULL, 15);
MainPurgeWindow();
break;
case IDM_HELPHELPFORHELP:
HelpHelpForHelp(mp2);
break;
case IDM_HELPEXTENDED:
HelpExtended(mp2);
break;
case IDM_HELPKEYS:
HelpKeys(mp2);
break;
case IDM_HELPINDEX:
HelpIndex(mp2);
break;
case IDM_HELPTUTORIAL:
HelpTutorial(mp2);
break;
case IDM_HELPABOUT:
HelpAbout(mp2);
break;
default:
break;
}
} /* MainCommand() */
/****************************************************************\
* Initialization routine
*--------------------------------------------------------------
*
* Name: Init()
*
* Purpose: Performs initialization functions.
*
* Usage: Called once before the message queue is queried.
*
* Method:
* - starts processing thread
* - registers all window classes
*
* Returns:
* TRUE - initialization is successful
* FALSE - initialization failed
\****************************************************************/
BOOL Init(int argc, char *argv[])
{
PTIB ptibDummy;
PIB *ppibProcess;
ULONG flCtlData; /* frame control data */
CHAR pszBuff[CCHMAXPATH];
RESULTCODES resc;
/* load application name from resource file */
if(!WinLoadString(hab, 0, IDS_APPNAME, MAXNAMEL, szAppName))
return FALSE;
/* register the main client window class */
if(!WinRegisterClass(hab,
(PSZ)szAppName,
MainWndProc,
CS_SIZEREDRAW | CS_CLIPCHILDREN,
0))
{
return FALSE;
}
flCtlData = FCF_STANDARD | FCF_VERTSCROLL | FCF_HORZSCROLL;
if (NULLHANDLE == (hwndMainFrame = WinCreateStdWindow(HWND_DESKTOP,
WS_VISIBLE,
(PULONG)&flCtlData,
(PSZ)szAppName,
(PSZ)NULL,
WS_VISIBLE,
(HMODULE)NULL,
IDR_MAIN,
&hwndMain)))
return FALSE;
WinSetWindowText(hwndMainFrame, szAppName);
if (DosGetInfoBlocks(&ptibDummy, &ppibProcess) ||
!(hqQ = InitQ((*ppibProcess).pib_ulpid, /* proccess that will send WM_CLOSE command */
hwndMainFrame))) /* window to post to */
return FALSE;
if (argc > 1)
{
if ((BOOL)DosExecPgm(pszBuff, CCHMAXPATH, EXEC_ASYNC, NULL, NULL, &resc, argv[1]))
{
MessageBox(hwndMain, IDMSG_CANNOT_EXEC_CLIENT, MB_CUAWARNING | MB_OK, TRUE);
}
}
InitHelp();
return TRUE;
} /* Init() */
/****************************************************************\
* Exit routine
*--------------------------------------------------------------
*
* Name: FileExit(mp2)
*
* Purpose: Processes the File menu's Exit item.
*
* Usage: called whenever Exit from the file menu is
* selected
*
* Method: Routine posts a WM_CLOSE message to the main
* application window.
*
* Returns:
*
\****************************************************************/
VOID FileExit()
{
WinPostMsg(hwndMain, WM_CLOSE, (MPARAM)NULL, (MPARAM)NULL);
} /* FileExit() */