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Archived:Using CTextResolver to resolve error texts

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{{KBCS}}
 
{{KBCS}}
{|style="background:#eceff2" width="660px" border="1" cellpadding="5" cellspacing="0"
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{{CodeSnippet
|-
+
|id=CS000966
|'''ID''' || CS000966
+
|platform=S60 3rd Edition, FP1
|'''Creation date''' || May 20, 2008
+
|devices=Nokia N93
|-
+
|category=Symbian C++
|'''Platform''' || S60 3rd Edition, FP1
+
|subcategory=Files/Data
|'''Tested on devices''' || Nokia N93
+
|creationdate=May 20, 2008
|-
+
|keywords=CTextResolver, CTextResolver::NewL(), CTextResolver::ResolveErrorString()
|'''Category''' || Symbian C++
+
}}
|'''Subcategory''' || Files/Data
+
|}
+
 
+
 
+
{|style="background:#eceff2" width="660px" border="1" cellpadding="5" cellspacing="0"
+
|-
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|'''Keywords (APIs, classes, methods, functions):''' CTextResolver, CTextResolver::NewL(), CTextResolver::ResolveErrorString()
+
|}
+
  
 
==Overview==
 
==Overview==

Revision as of 23:37, 9 October 2008


Template:KBCS

Article Metadata
Tested with
Devices(s): Nokia N93
Compatibility
Platform(s): S60 3rd Edition, FP1
S60 3rd Edition FP1
Article
Keywords: CTextResolver, CTextResolver::NewL(), CTextResolver::ResolveErrorString()
Created: (20 May 2008)
Last edited: extkbeditor1 (09 Oct 2008)

Overview

This code snippet shows how the class CTextResolver is used to resolve the corresponding error texts for error codes. The class CTextResolver has two versions of the method ResolveErrorString(): the first one is for normal use and the second one is for advanced use. Both versions of the method are used in this example. It is also possible to give an optional error context to map error codes to texts in a unique way. If no context is given (aContext = ECtxAutomatic), the assumption is that the error codes are unique.

This snippet can be self-signed.

MMP file

The following libraries are required:

LIBRARY  commonui.lib


Header file

#ifndef __TESTERAPPUI_H__
#define __TESTERAPPUI_H__
 
// INCLUDES
#include <aknappui.h>
 
// FORWARD DECLARATIONS
class CTextResolver;
 
 
class CTesterAppView : public CCoeControl
{
private:
// Functions from base classes
void HandleCommandL(TInt aCommand);
//...
void DoHandleCommandL(TInt aCommand);
//...
private:
CTextResolver* iTextResolver;
};
 
#endif // __TESTERAPPUI_H__

Source file

#include <textresolver.h>
 
void CTesterAppUi::ConstructL()
{
//...
iTextResolver = CTextResolver::NewL(*iCoeEnv);
}
 
CTesterAppUi::~CTesterAppUi()
{
//...
delete iTextResolver;
}
 
void CTesterAppUi::HandleCommandL(TInt aCommand)
{
switch (aCommand)
{
case EEikCmdExit:
case EAknSoftkeyExit:
Exit();
break;
 
case ECommand1:
{
TPtrC errorTextPtr; // pointer to returned error text
 
TRAPD( errSimple, DoHandleCommandL( aCommand ) );
if ( errSimple != KErrNone )
{
// resolve the given error code
errorTextPtr.Set(iTextResolver->ResolveErrorString(errSimple));
}
else
{
// KErrNone, do something....
}
}
break;
 
case ECommand2:
{
TInt textId =0; // ID of the returned text
TUint flags = 0; // priority of the returned error
TPtrC errorTextPtr; // pointer to returned error text
 
TRAPD( errAdvanced, DoHandleCommandL( aCommand ) );
if ( errAdvanced != KErrNone)
{
// resolve the given error code
errorTextPtr.Set(iTextResolver->ResolveErrorString(errAdvanced, textId, flags));
 
//the flag indicates that the error has no proper explanation
if (flags & EErrorResBlankErrorFlag)
{
// do something...
}
 
//the flag indicates that Text Resolver does not support the error code
if (flags & EErrorResUnknownErrorFlag)
{
// do something...
}
 
//the flag is returned while processing KErrNoMemory error code
if (flags & EErrorResOOMFlag)
{
// do something...
}
}
else
{
// KErrNone do something...
}
}
break;
 
default:
Panic(ETesterUi);
break;
}
}
 
void CTesterAppUi::DoHandleCommandL(TInt aCommand)
{
//Do Something that might leave...
User::Leave(KErrNotSupported );
}


Postconditions

The class CTextResolver resolves the error text when the method called by the user leaves.

See also

CS000965 - Using class CErrorUI to display error notes

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