188 lines
4 KiB
C++
188 lines
4 KiB
C++
/*++
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Copyright (C) Microsoft Corporation, 1998 - 1998
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All rights reserved.
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Module Name:
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msgbox.cxx
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Abstract:
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MessageBox class
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Author:
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Steve Kiraly (SteveKi) 03/23/98
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Revision History:
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--*/
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#include "precomp.hxx"
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#pragma hdrstop
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#include "msgbox.hxx"
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/*++
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Routine Name:
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PrintUIMessageBox
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Routine Description:
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This routine is very similar to the win32 MessageBox except it
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creates a hidden dialog when the user request that a help button
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be displayed. The MessageBox api is some what broken
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with respect to the way the help button works. When the help button is
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clicked the MessageBox api will send a help event to the parent window.
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It is the responsiblity of the parent window to respond corectly, i.e.
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start either WinHelp or HtmlHelp. Unfortunatly not in all cases does the
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caller have a parent window or has ownership to the parent window code to
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add suport for the help event. In these case is why someone would use this
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function.
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Arguments:
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hWnd - handle of owner window
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lpText - address of text in message box
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lpCaption - address of title of message box
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uType - style of message box
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pfHelpCallback - pointer to function called when a WM_HELP message is received, this
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parameter is can be NULL then api acts like MessageBox.
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pRefData - user defined refrence data passed along to the callback routine,
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this paremeter can be NULL.
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Return Value:
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See windows sdk for return values from MessageBox
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--*/
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INT
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PrintUIMessageBox(
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IN HWND hWnd,
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IN LPCTSTR pszMsg,
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IN LPCTSTR pszTitle,
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IN UINT uFlags,
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IN pfHelpCallback pCallback, OPTIONAL
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IN PVOID pRefData OPTIONAL
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)
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{
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SPLASSERT( pszMsg );
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SPLASSERT( pszTitle );
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INT iRetval = 0;
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//
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// If the caller specifed the help flag and provided a callback then
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// use the message box dialog class to display the message box, otherwise
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// fall back to the original behavior of MessageBox.
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//
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if( ( uFlags & MB_HELP ) && pCallback )
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{
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TMessageBoxDialog Dialog( hWnd, uFlags, pszTitle, pszMsg, pCallback, pRefData );
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if( VALID_OBJ( Dialog ) )
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{
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iRetval = Dialog.iMessageBox();
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}
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}
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else
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{
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//
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// Display the message box.
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//
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iRetval = ::MessageBox( hWnd, pszMsg, pszTitle, uFlags );
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}
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return iRetval;
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}
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/********************************************************************
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Message box helper class.
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********************************************************************/
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TMessageBoxDialog::
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TMessageBoxDialog(
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IN HWND hWnd,
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IN UINT uFlags,
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IN LPCTSTR pszTitle,
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IN LPCTSTR pszMsg,
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IN pfHelpCallback pCallback,
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IN PVOID pRefData
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) : _hWnd( hWnd ),
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_uFlags( uFlags ),
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_pszTitle( pszTitle ),
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_pszMsg( pszMsg ),
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_pCallback( pCallback ),
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_pRefData( pRefData ),
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_iRetval( 0 )
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{
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}
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TMessageBoxDialog::
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~TMessageBoxDialog(
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VOID
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)
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{
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}
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BOOL
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TMessageBoxDialog::
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bValid(
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VOID
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) const
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{
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return TRUE;
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}
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INT
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TMessageBoxDialog::
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iMessageBox(
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VOID
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)
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{
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_iRetval = 0;
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DialogBoxParam( ghInst,
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MAKEINTRESOURCE( DLG_MESSAGE_BOX ),
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_hWnd,
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MGenericDialog::SetupDlgProc,
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(LPARAM)this );
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return _iRetval;
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}
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BOOL
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TMessageBoxDialog::
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bHandleMessage(
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IN UINT uMsg,
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IN WPARAM wParam,
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IN LPARAM lParam
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)
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{
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BOOL bStatus = TRUE;
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switch (uMsg)
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{
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case WM_INITDIALOG:
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ShowWindow( _hDlg, SW_HIDE );
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_iRetval = ::MessageBox( _hDlg, _pszMsg, _pszTitle, _uFlags );
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EndDialog( _hDlg, IDOK );
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break;
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case WM_HELP:
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bStatus = ( _pCallback ) ? _pCallback( _hDlg, _pRefData ) : FALSE;
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break;
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default:
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bStatus = FALSE;
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break;
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}
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return bStatus;
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}
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