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OS/2 Shareware BBS: 10 Tools
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10-Tools.zip
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dialog.zip
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DIALOG.C
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C/C++ Source or Header
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1998-04-20
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19KB
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496 lines
/*************************************************************************
*
* File Name : Dialog.c
*
* Description : This program demonstrates how to associate a pop-up
* window with a standard window. The pop-up window
* is defined as a dialog template in a resource file.
*
* Concepts : This program displays a standard window. The action bar
* contains a single choice: Options. The Options
* pull-down contains a choice that displays a pop-up
* window which contains an entry field, and OK and Cancel
* pushbuttons. When the user types a place name in the
* entry field and selects OK, the pop-up window
* disappears, and the place name is displayed at the end
* of the text "You live in".
*
* API's :
* -------------
* GpiCharStringAt WinDestroyWindow WinInvalidateRegion
* GpiSetColor WinDismissDlg WinLoadString
* WinBeginPaint WinDispatchMsg WinPostMsg
* WinCreateMsgQueue WinDlgBox WinQueryWindowText
* WinCreateStdWindow WinEndPaint WinRegisterClass
* WinDefDlgProc WinFillRect WinSendMsg
* WinDefWindowProc WinGetMsg WinTerminate
* WinDestroyMsgQueue WinInitialize WinWindowFromID
*
* Copyright (C) 1992 IBM Corporation
*
* 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. *
*
************************************************************************/
#define INCL_WINSYS /* Selectively include */
#define INCL_WINFRAMEMGR /* relevant parts of */
#define INCL_WINMENUS /* the PM header file */
#define INCL_WINDIALOGS
#define INCL_GPI
#include <os2.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "dialog.h" /* Resource symbolic identifiers*/
#define LENGTH_STRING 33 /* Length of string */
#define RETURN_ERROR 1 /* return value for exit */
#define BEEP_WARN_FREQ 60 /* frequency of warning beep */
#define BEEP_WARN_DUR 100 /* duration of warning beep */
#define MAXITEMS 8 /* numer of menu items in FCF_SYSMENU*/
/* Function prototypes */
int main(VOID);
MRESULT EXPENTRY MyWindowProc( HWND hwnd, ULONG msg, MPARAM mp1, MPARAM mp2 );
MRESULT EXPENTRY MyDlgProc( HWND hwnd, ULONG msg, MPARAM mp1, MPARAM mp2 );
MRESULT EXPENTRY ProdInfoDlgProc(HWND hwnd, ULONG msg, MPARAM mp1, MPARAM mp2);
VOID DisplayMessage( PCH str );
VOID SetSysMenu(HWND hwnd);
/* Define parameters by type */
HAB hab; /* Anchor block handle */
HMQ hmq; /* Message queue handle */
HWND hwndClient; /* Client window handle */
ULONG flCreate = FCF_STANDARD; /* Frame control flag */
BOOL bComplete = FALSE; /* Switch for first time through*/
HWND hwndFrame; /* Frame window handle */
CHAR szLocation[LENGTH_STRING] = ""; /* To hold text entered by user */
CHAR szResponse[LENGTH_STRING] = ""; /* To hold "You live in" */
/****************************************************************
* Name: main()
*
* Description: Entry point of program.
*
* Concepts: 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.
*
* API's : WinInitilize
* DosBeep
* WinCreateMsgQueue
* WinTerminate
* WinRegisterClass
* WinCreateStdWindow
* WinSetWindowText
* WinGetMsg
* WinDispatchMsg
* WinDestroyWindow
* WinDestroyMsgQueue
*
* Parameters: None
*
* Returns:
* 1 - if sucessful execution completed
* 0 - if error
\****************************************************************/
int main(VOID)
{
QMSG qmsg;
BOOL success;
hab = WinInitialize( 0 );
if(!hab)
{
DosBeep(BEEP_WARN_FREQ, BEEP_WARN_DUR);
exit(RETURN_ERROR);
}
hmq = WinCreateMsgQueue( hab, 0 );
if(!hmq)
{
DosBeep(BEEP_WARN_FREQ, BEEP_WARN_DUR);
WinTerminate(hab);
exit(RETURN_ERROR);
}
success = WinDlgBox( HWND_DESKTOP, /* Place anywhere on desktop */
HWND_DESKTOP, /* Owned by desk top */
(PFNWP)ProdInfoDlgProc, /* Addr. of procedure */
(HMODULE)0, /* Module handle */
ID_PRODINFO, /* Dialog identifier in resource*/
NULL); /* Initialization data */
if (!success)
{
DisplayMessage("Could Not Register Class");
exit(RETURN_ERROR);
}
success = WinRegisterClass( /* Register window class */
hab, /* Anchor block handle */
"MyWindow", /* Window class name */
MyWindowProc, /* Address of window procedure */
CS_SIZEREDRAW, /* Class style */
0 /* No extra window words */
);
if (!success)
{
DisplayMessage("Could Not Register Class");
exit(RETURN_ERROR);
}
hwndFrame = WinCreateStdWindow(
HWND_DESKTOP, /* Desktop window is parent */
WS_VISIBLE, /* Frame style */
&flCreate, /* Frame control flag */
"MyWindow", /* Window class name */
"", /* Window title */
0L, /* Client style of VISIBLE */
(HMODULE)NULL, /* Resource is in .EXE file */
ID_MAINWND, /* Frame window identifier */
&hwndClient); /* Client window handle */
if (!hwndFrame)
{
DisplayMessage("Could Not Create Main Window");
exit(RETURN_ERROR);
}
WinSetWindowText(hwndFrame, "Dialog - Sample Program");
/*
* Get and dispatch messages from the application message queue
* until WinGetMsg returns FALSE, indicating a WM_QUIT message.
*/
while( WinGetMsg( hab, &qmsg, (HWND)NULL, 0, 0 ) )
WinDispatchMsg( hab, &qmsg );
WinDestroyWindow( hwndFrame ); /* Tidy up... */
WinDestroyMsgQueue( hmq ); /* and */
WinTerminate( hab ); /* terminate the application */
return(0);
}
/*********************** End of main procedure ************************/
/****************************************************************
* Name: MyWndProc
*
* Description : Window procedure for the main clent window.
*
* Concepts : Processes the messages sent to the main client
* window.
*
* API's : WinLoadString
* WinDlgBox
* WinInvalidateRegion
* WinPostMsg
* WinDefDlgProc
* WinBeginPaint
* WinFillRect
* GpiCharStringAt
* GpiSetColor
* WinEndPaint
*
* Parameters : hwnd - Window handle to which message is addressed
* msg - Message type
* mp1 - First message parameter
* mp2 - Second message parameter
*
* Returns: Return values are determined by each message
*
****************************************************************/
MRESULT EXPENTRY MyWindowProc ( HWND hwnd, ULONG msg, MPARAM mp1, MPARAM mp2 )
{
switch( msg )
{
case WM_CREATE:
/*
* Window initialization - load "You live in" string from resource
*/
WinLoadString( hab,
(HMODULE)NULL, /* Resource is in .EXE file */
ID_RESPONSE, /* String identifier */
sizeof( szResponse ), /* Size of buffer */
(PSZ)szResponse); /* Buffer */
break;
case WM_COMMAND:
/*
* When the user chooses "Where..." from the Options pull-down,
* the application displays a dialog box. WinDlgBox calls the
* dialog procedure below. WinDlgBox does not return until the
* dialog procedure returns.
* WinInvalidateRegion sends a WM_PAINT message.
*/
switch ( SHORT1FROMMP( mp1 ) )
{
case ID_WHERE:
WinDlgBox( HWND_DESKTOP, /* Place anywhere on desktop */
hwndFrame, /* Owned by frame */
MyDlgProc, /* Address of dialog procedure */
(HMODULE)0, /* Module handle */
ID_MYDIALOG, /* Dialog identifier in resource*/
NULL); /* Initialization data */
WinInvalidateRegion( hwnd, NULLHANDLE, FALSE ); /* Force a repaint */
break;
case ID_EXITPROGRAM:
WinPostMsg( hwnd, WM_CLOSE, NULL, NULL);
break;
default:
return WinDefWindowProc( hwnd, msg, mp1, mp2 );
}
break;
case WM_PAINT:
/*
* Window contents are drawn here. First time through, bComplete
* is FALSE, so window is simply filled with SYSCLR_WINDOW.
* On subsequent passes, if bComplete has been set to TRUE in the
* dialog procedure, GpiCharStringAt draws the text.
*/
{
HPS hps; /* Presentation space handle */
POINTL pt; /* String screen coordinates */
RECTL rc; /* Window rectangle */
hps = WinBeginPaint( hwnd, (HPS)NULL, &rc );
WinFillRect( hps, &rc, SYSCLR_WINDOW );
if( bComplete)
{
GpiSetColor( hps, CLR_NEUTRAL ); /* Text color same as PM */
pt.x = 50L; pt.y = 50L; /* Coordinates of "You live in" */
GpiCharStringAt( hps, &pt, (LONG)strlen( szResponse ), szResponse );
pt.x = 50L; pt.y = 30L; /* Coordinates of location */
GpiCharStringAt( hps, &pt, (LONG)strlen( szLocation ), szLocation );
}
WinEndPaint( hps ); /* Drawing is complete */
}
break;
case WM_CLOSE:
WinPostMsg( hwnd, WM_QUIT, NULL, NULL); /* Cause termination */
break;
default:
/*
* Must have WinDefWindowProc in your window procedure
*/
return WinDefWindowProc( hwnd, msg, mp1, mp2 );
}
return (MRESULT) FALSE;
}
/*********************** End of window procedure ***********************/
/*********************************************************************
* Name : MyDlgProc
*
* Description : Processes all messages sent to the dialog.
*
* Concepts : Called for each message sent to the dialog box.
* A switch statement branches to the routines to be
* performed for each message processed. Any messages
* not specifically process are passed to the default
* window procedure WinDefDlgProc().
*
* API's : WinQueryWindowText
* WinDismissDlg
*
* Parameters : hwnd - Window handle to which message is addressed
* msg - Message type
* mp1 - First message parameter
* mp2 - Second message parameter
*
* Returns : Dependent upon message sent
*
****************************************************************/
MRESULT EXPENTRY MyDlgProc( HWND hwndDlg, ULONG msg, MPARAM mp1, MPARAM mp2 )
{
switch ( msg )
{
case WM_INITDLG:
SetSysMenu(hwndDlg); /* remove grayed items from sys menu*/
break;
case WM_COMMAND: /* Posted by pushbutton or key */
/*
* PM sends a WM_COMMAND message when the user presses either
* the Enter or Escape pushbuttons.
*/
switch( SHORT1FROMMP( mp1 ) ) /* Extract the command value */
{
case DID_OK: /* The Enter pushbutton or key. */
/* WinQueryWindowText copies the*/
/* contents of the entry field */
/* into szLocation. */
WinQueryWindowText( WinWindowFromID( hwndDlg, ID_ENTRYFIELD ),
LENGTH_STRING,
szLocation );
bComplete = TRUE; /* Set switch so strings are */
/* drawn in WM_PAINT processing.*/
case DID_CANCEL: /* The Cancel pushbutton or Escape key */
WinDismissDlg( hwndDlg, TRUE ); /* Removes the dialog box */
return (MRESULT) FALSE;
default:
break;
}
break;
default:
/*
* Any event messages that the dialog procedure has not processed
* come here and are processed by WinDefDlgProc.
* This call MUST exist in your dialog procedure.
*/
return WinDefDlgProc( hwndDlg, msg, mp1, mp2 );
}
return (MRESULT) FALSE;
}
/********************** End of dialog procedure ************************/
/*********************************************************************
* Name : ProdInfoDlgProc
*
* Description : Processes all messages sent to the Product
* Information dialog box.
*
* Concepts : Called for each message sent to the Product
* Information dialog box. The Product
* Information box only has a button control so
* this routine only processes WM_COMMAND
* messages. Any WM_COMMAND posted must have come
* from the Ok button so we dismiss the dialog
* upon receiving it.
*
* API's : WinDismissDlg
* WinDefDlgProc
*
* Parameters : hwnd - Window handle to which message is addressed
* msg - Message type
* mp1 - First message parameter
* mp2 - Second message parameter
*
* Returns : Dependent upon message sent
*
****************************************************************/
MRESULT EXPENTRY ProdInfoDlgProc( HWND hwnd, ULONG msg, MPARAM mp1,
MPARAM mp2)
{
switch(msg)
{
case WM_INITDLG:
SetSysMenu(hwnd); /* remove grayed items from sys menu*/
break;
case WM_COMMAND:
/*
* No matter what the command, close the dialog
*/
WinDismissDlg(hwnd, TRUE);
break;
default:
return(WinDefDlgProc(hwnd, msg, mp1, mp2));
break;
}
return (MRESULT)0;
}
/********************** End ofProdinfo dialog procedure ****************/
/****************************************************************
* Name: DisplayMessage
*
* Description : Displays error messages.
*
* Concepts : Displays a message box containing an error
* message each time called.
*
* API's : WinMessageBoxNon
*
* Parameters : str - error message to display
*
* Returns: Void
*
****************************************************************/
VOID DisplayMessage(PCH str)
{
/*
* This routine calls WinMessageBox to dsplay error messages to the
* user.
*/
WinMessageBox(HWND_DESKTOP, HWND_DESKTOP, (PCH) str,
(PCH) "Error Messages For The Dialog Sample", ID_MESSAGEBOX,
MB_OK | MB_APPLMODAL | MB_MOVEABLE | MB_ERROR);
}
/******************* End of DisplayMessage procedure ********************/
/***********************************************************
* Name : SetSysMenu
*
* Description : Procedure to remove grayed items from
* all dialog window system menus.
*
* Concepts : This routine obtains the handle for the system
* menu and sends a message to delete the item
* from the System Menu using the pre-defined
* menuitem value. The item is deleted only if
* it is disabled.
*
* It is recommended that the system menu not
* be altered by the programmer.
*
* API's : WinWindowFromID, WinSendMsg.
*
* Parameters : None
*
* Return : None
*
**************************************************************/
VOID SetSysMenu(HWND hwndDlg)
{
HWND hwndSysMenu;
MENUITEM menuItem;
SHORT sItemCount;
SHORT sMenu[MAXITEMS] = {SC_HIDE,
SC_RESTORE,
SC_SIZE,
SC_MOVE,
SC_MINIMIZE,
SC_MAXIMIZE,
SC_CLOSE,
SC_TASKMANAGER};
/* Obtain the system menu handle */
hwndSysMenu = WinWindowFromID(hwndDlg,
FID_SYSMENU);
for (sItemCount = 0;sItemCount < MAXITEMS ;sItemCount ++ )
{
/* Obtain the MENUITEM structure for the menu item */
WinSendMsg(hwndSysMenu,
MM_QUERYITEM,
MPFROM2SHORT(sMenu[sItemCount],TRUE),
MPFROMP(&menuItem));
/* If the menu item is disabled - delete it. */
if (menuItem.afAttribute == MIA_DISABLED)
{
WinSendMsg(hwndSysMenu,
MM_DELETEITEM,
MPFROM2SHORT(sMenu[sItemCount],TRUE),
NULL);
}
}
}
/******************* End of SetSysMenu() procedure ********************/