1 /*

     2 * Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 

    19 

    20  /********************************************************************************

    21  *

    22  * System Includes

    23  *

    24  ********************************************************************************/

    25 #include <e32std.h>

    26 #include <e32base.h>

    27 #include <eikenv.h>

    28 

    29 /********************************************************************************

    30  *

    31  * Local Includes

    32  *

    33  ********************************************************************************/

    34 #include "MsgWin.h"

    35 

    36 /********************************************************************************

    37  *

    38  * TMsgWinDesOverflow

    39  *

    40  * Locally defined class to allow us to handle a text buffer overflow

    41  * within the call to 'AppendFormat' used to format the text for

    42  * the message window.

    43  *

    44  * If the overflow occurs the overridden method 'Overflow' is called.

    45  *

    46  ********************************************************************************/

    47 class TMsgWinDesOverflow : public TDesOverflow

    48 {

    49 public:

    50 	// From base interface class TDesOverflow.

    51 	/* virtual */ void Overflow( TDes &aDes );

    52 };

    53 

    54 /********************************************************************************

    55  *

    56  * TMsgWinDesOverflow -- Overflow implementation

    57  *

    58  * Called if the buffer overflowed in the call to AppendFormat.

    59  * We replace the last few character with ellipses to indicate there

    60  * was more text that could not be shown.

    61  * The user has lost the end of their text anyway so changing the last few

    62  * characters will not make things worse.

    63  *

    64  ********************************************************************************/

    65 void TMsgWinDesOverflow::Overflow( TDes &aDes )

    66 {

    67 	_LIT( ellipses, "..." );

    68 	const TInt ellipsesLength = ellipses.operator const TDesC&().Length();

    69 

    70 	TInt textLength = aDes.MaxLength();

    71 	aDes.Replace( textLength - ellipsesLength, ellipsesLength, ellipses );

    72 }

    73 

    74 /********************************************************************************

    75  *

    76  * TMsgWin::Show

    77  *

    78  * Format the text the user passed and show a simple message window.

    79  * If the text was too long for our fixed buffer then we handle

    80  * the buffer overflow.

    81  *

    82  ********************************************************************************/

    83 void TMsgWin::Show( TPtrC text, ... )

    84 {

    85 	static const TInt defLength = 64;

    86 	TBuf<defLength> buffer(  _L("") );

    87 

    88 	VA_LIST list;

    89 	VA_START( list, text );

    90 

    91 	buffer.Zero();

    92 

    93 	// Use locally defined call for handling overflows.

    94 	TMsgWinDesOverflow	overflowHandler;

    95 	buffer.AppendFormatList( text, list, &overflowHandler);

    96 

    97 	VA_END(list);

    98 

    99 	CEikonEnv::Static()->AlertWin( buffer, _L("") );

   100 }