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chxavmessagedialog.cpp：源码内容
							/*****************************************************************************
 * chxavmessagedialog.cpp
 * ----------------------
 *
 * Synopsis:
 * Contains the declaration of the CHXAvMessageDialog.  It's used to encapsulate
 * nicely the diffent dialogs and warning boxes, requiring input or yes/no/cancel.
 *
 * Target:
 * Symbian OS
 *
 *
 * (c) 1995-2003 RealNetworks, Inc. Patents pending. All rights reserved.
 *
 *****************************************************************************/
// Symbian includes...
#include <eikdialg.h>
#include <aknglobalnote.h>
#include <aknnotedialog.h>
#include <aknnotewrappers.h> 
#include <aknquerydialog.h>
#include <errorui.h>
#include <aknprogressdialog.h>
#include <aknmessagequerydialog.h> 
// Helix includes...
#include "hxstring.h"
#include "hlxosstr.h"
// Includes from this project...
#include "chxavmisc.h"
#include "chxavfileutil.h"
#include "chxavcleanstring.h"
#include "chxavmessagedialog.h"
#include "chxavcleanupstack.h"
#include "chxavmessagedialog.h"
#include "realplayer.rsg"
#include "realplayer.hrh"
#include "chxavutil.h"
// Local functions...
namespace
{
    
void SetInfoCbaHelper(CEikDialog* pDlg, CHXAvMessageDialog::InfoPromptType type)
{
     // possibly reset cba
    CEikButtonGroupContainer& cba = pDlg->ButtonGroupContainer();
    switch(type)
    {
    case CHXAvMessageDialog::PromptOk:
        // use our own so ok is on right side like others
        cba.SetCommandSetL(R_AVP_SOFTKEYS_OK);
        break;
    case CHXAvMessageDialog::PromptCancel:
        cba.SetCommandSetL(R_AVKON_SOFTKEYS_CANCEL);
        break;
    case CHXAvMessageDialog::PromptBack:
        cba.SetCommandSetL(R_AVKON_SOFTKEYS_BACK);
        break;
    case CHXAvMessageDialog::PromptClose:
        cba.SetCommandSetL(R_AVKON_SOFTKEYS_CLOSE);
        break;
    }
}
void DoAlertHelperLD(CAknResourceNoteDialog* pDlg,
                        const TDesC& text,
                       CAknNoteDialog::TTimeout timeout,
		        CAknNoteDialog::TTone tone)
{
    pDlg->SetTimeout(timeout);
    pDlg->SetTone(tone);
    pDlg->ExecuteLD(text);
}
} // locals
template<typename BaseClass>
void CHXAvNoteWrapper<BaseClass>::PostLayoutDynInitL()
{
    BaseClass::PostLayoutDynInitL();
    if(m_bAddCloseButton)
    {
        // show close button so user knows he can cancel
        SetInfoCbaHelper(this, CHXAvMessageDialog::PromptClose);
    }
}
void CHXAvMessageDialog::DoAlertConfirmL(const TDesC& text, 
                     bool bModal,
                     CAknNoteDialog::TTimeout timeout,
		     CAknNoteDialog::TTone tone)
{
    CAknConfirmationNote* pDlg = new (ELeave) CHXAvNoteWrapper<CAknConfirmationNote>(bModal, CAknNoteDialog::ENoTimeout == timeout);
    DoAlertHelperLD(pDlg, text, timeout, tone);
}
HBufC* CHXAvMessageDialog::DoQueryTextL(const TDesC& prompt, const TDesC& defaultText, TUint cchMax)
{ 
    HBufC* pBuff = HBufC::NewL(cchMax);
    AUTO_PUSH_POP(pBuff); // out
    //
    // this handles case where defaultText > max (i.e., edit box is 
    // initialized with a string that is longer than what user is supposed
    // to be able to enter)
    //
    TUint cchMaxCopy = min( TUint(defaultText.Length()), cchMax);
    // copy default text to appear in edit box
    TPtr ptr = pBuff->Des();
    ptr.Copy(defaultText.Ptr(), cchMaxCopy);
    // in case filename has weird non-printable characters
    CHXAvMisc::MakeDisplayFriendly(ptr);
    TPtrC ptrPrompt(prompt);
    CAknTextQueryDialog* pDlg = new (ELeave) CAknTextQueryDialog(ptr, ptrPrompt);
    pDlg->PrepareLC(R_AVP_QUERY_TEXT_DIALOG);
    pDlg->SetMaxLength(cchMax);
    // default to lower case text entry mode (see AVKON EDWIN CONSTANTS in uikon.hrh)
    CAknQueryControl* pQuery = static_cast<CAknQueryControl*>(pDlg->ControlOrNull(EGeneralQuery));
    CEikEdwin* pEd = static_cast<CEikEdwin*>(pQuery->ControlByLayoutOrNull(EDataLayout));
    pEd->SetAknEditorCase(EAknEditorLowerCase);
    TInt res = pDlg->RunLD();
    if(0 == res)
    {
        // user canceled
        HX_DELETE(pBuff);
    }
    // user entered something
    return pBuff;
}
////////////////////////////////////////////
//
// ask for a filename (until user supplies a valid 
// name or cancels)
//
// return 0 if user cancels
//
TFileName* CHXAvMessageDialog::GetFileNameFromUserL(const TDesC& prompt, 
                                       const TDesC& oldName, 
                                       TUint32 cchMaxName)
{
    
    HX_ASSERT(cchMaxName <= KMaxFileName);
    HX_ASSERT(cchMaxName > 0);
    TPtrC ptrPrompt(prompt);
    TFileName* pNameOut = new (ELeave) TFileName;
    AUTO_PUSH_POP(pNameOut); // out
    pNameOut->Copy(oldName);
    bool bNeedToPrompt = true;
    while(bNeedToPrompt)
    {
        HBufC* pbuff = CHXAvMessageDialog::DoQueryTextL(ptrPrompt, *pNameOut, cchMaxName);
	if( pbuff )
        {
            AUTO_PUSH_POP_DEL(pbuff);
            pNameOut->Copy(*pbuff);
	    // check that name is valid
            CHXAvFile::FileNameValidity validity = CHXAvFile::GetFileNameValidity(*pNameOut);
            switch( validity )
            {
                case CHXAvFile::nvValid:
                    // good name!
                    bNeedToPrompt = false;
                    break;
                case CHXAvFile::nvInvalidIllegalChars:
                    // 'name can't contain certain chars'
                    DoAlertInfoL(CHXAvCleanString(R_ERR_INVALID_FILENAME_CHARS)());
                    break;
                case CHXAvFile::nvTooLong:
                    // user should be prevented from entering this via cchMaxName above
                    HX_ASSERT(false); 
                    // fall through...
                case CHXAvFile::nvInvalidDots:
                default:
                    // 'unsuitable filename'
                    DoAlertInfoL(CHXAvCleanString(R_ERR_INVALID_FILENAME_BAD)());
                    break;
            }
   
	}
	else
	{
	    // cancel out
	    HX_DELETE(pNameOut);
	    bNeedToPrompt = false;
	}
    }
    return pNameOut;
}
void CHXAvMessageDialog::DoAlertErrorL(const TDesC& text, 
                     bool bModal,
                     CAknNoteDialog::TTimeout timeout,
		     CAknNoteDialog::TTone tone)
{
    CAknErrorNote* pDlg = new (ELeave) CHXAvNoteWrapper<CAknErrorNote>(bModal, CAknNoteDialog::ENoTimeout == timeout);
    DoAlertHelperLD(pDlg, text, timeout, tone);
}
////////////////////////////////////////////////
// use this for info text that needs to be scrollable
//
void CHXAvMessageDialog::DoLongTextInfoPromptL(const TDesC& caption, const TDesC& text, InfoPromptType type)
{
    TPtrC ptr(text);
    CAknMessageQueryDialog* pDlg = CAknMessageQueryDialog::NewL(ptr);
    pDlg->PrepareLC(R_AVKON_MESSAGE_QUERY_DIALOG);
    // save cleanupstack init until LD
    {
        AUTO_PUSH_POP(pDlg);
        pDlg->MakeLeftSoftkeyVisible(EFalse);
        pDlg->QueryHeading()->SetTextL(caption);
        SetInfoCbaHelper(pDlg, type);
    }
    pDlg->RunLD();
}
void CHXAvMessageDialog::DoAlertInfoL(const TDesC& text, 
                     bool bModal,
                     CAknNoteDialog::TTimeout timeout,
		     CAknNoteDialog::TTone tone)
{
    CAknInformationNote* pDlg = new (ELeave) CHXAvNoteWrapper<CAknInformationNote>(bModal, CAknNoteDialog::ENoTimeout == timeout);
    DoAlertHelperLD(pDlg, text, timeout, tone);
}
////////////////////////////////////////////
//
TInt CHXAvMessageDialog::DoGlobalNoteL(TAknGlobalNoteType type, TInt textResID)
{
    CHXAvCleanString text(textResID);
    return DoGlobalNoteL(type, text());
}
////////////////////////////////////////////
//
TInt CHXAvMessageDialog::DoGlobalNoteL(TAknGlobalNoteType type, const TDesC& text)
{
/*
aknnotifystd.h:	
EAknGlobalInformationNote
EAknGlobalWarningNote
EAknGlobalConfirmationNote
EAknGlobalErrorNote
EAknGlobalWaitNote
EAknGlobalPermanentNote
*/
    // caller must manage ids and ensure that only one note is be shown at
    // a time; epoc debug build panics otherwise
   
    CAknGlobalNote* pNote = CAknGlobalNote::NewL();
    AUTO_PUSH_POP_DEL(pNote);
    return pNote->ShowNoteL(type, text); 
}
////////////////////////////////////////////
// cancel global note associated with given id
//
void CHXAvMessageDialog::CancelGlobalNoteL(TInt idNote)
{
    CAknGlobalNote* pNote = CAknGlobalNote::NewL();
    AUTO_PUSH_POP_DEL(pNote);
    pNote->CancelNoteL(idNote); 
        
}
////////////////////////////////////////////////////////
// show modal; prompt for affirmative or negative
//
bool CHXAvMessageDialog::DoQueryL(TInt textResID, QueryPromptType type, CAknQueryDialog::TTone tone)
{
    CHXAvCleanString queryText(textResID);
    return DoQueryL(queryText(), type, tone);
}
bool CHXAvMessageDialog::DoQueryL(const TDesC& promptText, QueryPromptType type, CAknQueryDialog::TTone tone)
{
    TPtrC ptr(promptText);
    CAknQueryDialog* pDlg = new (ELeave) CAknQueryDialog(ptr, tone);
    pDlg->PrepareLC(R_AVP_YES_NO_DIALOG);
    // save cleanupstack init until LD
    {
        AUTO_PUSH_POP(pDlg);
        // possibly reset cba
        CEikButtonGroupContainer& cba = pDlg->ButtonGroupContainer();
        switch(type)
        {
        case QueryYesNo:
            // this is default
            break;
        case QueryOkCancel:
            cba.SetCommandSetL(R_AVKON_SOFTKEYS_OK_CANCEL);
            break;
        case QueryOkBack:
            cba.SetCommandSetL(R_AVKON_SOFTKEYS_OK_BACK);
            break;
        }
    }
    TInt res = pDlg->RunLD();
    return 0 != res;
}
////////////////////////////////////////////////
//
void CHXAvMessageDialog::DoSystemErrorNoteL(TInt err)
{
    // use system handler
    CCoeEnv* pEnv = CCoeEnv::Static();
    CErrorUI* pError = CErrorUI::NewL(*pEnv);
    AUTO_PUSH_POP_DEL(pError);
    pError->ShowGlobalErrorNoteL(err);
}

						