clocationexamplecontainer.cpp

这是一个关于s60基于c++的关于手机地图和定位的代码

// @param aMessage The event in string format
// ---------------------------------------------------------
//
void CLocationExampleContainer::MessageL(const TDesC& aMessage)
    {
    CAknInformationNote* note = new (ELeave) CAknInformationNote();
    note->SetTextL(aMessage);
    note->ExecuteLD();
    }


// ---------------------------------------------------------
// CLocationExampleContainer::SizeChanged()
// Called by framework when the view size is changed
// ---------------------------------------------------------
//
void CLocationExampleContainer::SizeChanged()
    {
    // Make control use the whole client area
    iListBox->SetRect(Rect());


    if(iBgContext)
        {
        iBgContext->SetRect(Rect());
        if ( &Window() )
            {
            iBgContext->SetParentPos( PositionRelativeToScreen() );
            }
        }

    }

// ---------------------------------------------------------
// CLocationExampleContainer::CountComponentControls() const
// ---------------------------------------------------------
//
TInt CLocationExampleContainer::CountComponentControls() const
    {
    return 1; // return nbr of controls inside this container
    }

// ---------------------------------------------------------
// CLocationExampleContainer::ComponentControl(TInt aIndex) const
// ---------------------------------------------------------
//
CCoeControl* CLocationExampleContainer::ComponentControl(TInt aIndex) const
    {
    CCoeControl* control = NULL;
    switch ( aIndex )
        {
        case 0:
            control = iListBox;
            break;
        default:
            control = NULL;
        }
    return control;
    }

// ---------------------------------------------------------
// CLocationExampleContainer::Draw(const TRect& aRect) const
// ---------------------------------------------------------
//
void CLocationExampleContainer::Draw(const TRect& aRect) const
    {
    CWindowGc& gc = SystemGc();
    // Skins http://newlc.com/Enable-Skin-support-in-your.html
    MAknsSkinInstance* skin = AknsUtils::SkinInstance();
    AknsDrawUtils::Background( skin, iBgContext, this, gc, aRect );
    
    }

// -----------------------------------------------------------------------------
// CLocationExampleContainer::OfferKeyEventL
// Handles key events. Basically it just forwards them to listbox component.
// -----------------------------------------------------------------------------
//
TKeyResponse CLocationExampleContainer::OfferKeyEventL(const TKeyEvent &aKeyEvent, TEventCode aType)
    {

    // Center button
    if (aKeyEvent.iCode == EKeyOK && aType == EEventKey)
        {
        ShowContextSensiveMenuL();
		return EKeyWasConsumed;
        }

    return iListBox->OfferKeyEventL(aKeyEvent, aType);            
    }


// ---------------------------------------------------------
// CLocationExampleContainer::ShowContextSensiveMenuL
//     
// ---------------------------------------------------------
//
void CLocationExampleContainer::ShowContextSensiveMenuL()
    {
    if (!iParent->MenuBar())
        {
        User::Leave(KErrNotFound);
        }

    // New menu
    iParent->MenuBar()->SetMenuTitleResourceId(R_LOCATIONEXAMPLE_SPECIAL_MENUBAR);

    if (iParent->MenuBar())
        {
        iParent->MenuBar()->StopDisplayingMenuBar();
        }
    if (iParent->MenuBar())
        {
        iParent->MenuBar()->TryDisplayMenuBarL();
        }
    
    // Back to original
    iParent->MenuBar()->SetMenuTitleResourceId(R_LOCATIONEXAMPLE_MENUBAR1);
    }



// -----------------------------------------------------------------------------
// CLocationExampleContainer::MopSupplyObject
// -----------------------------------------------------------------------------
//
TTypeUid::Ptr CLocationExampleContainer::MopSupplyObject(TTypeUid aId)
    {
    if (iBgContext )
        {
        return MAknsControlContext::SupplyMopObject( aId, iBgContext );
        }
    return CCoeControl::MopSupplyObject(aId);
    }


// -----------------------------------------------------------------------------
// CLocationExampleContainer::ProcessPositionInfo
// Processes position info in to a string representation.
// -----------------------------------------------------------------------------
//
void CLocationExampleContainer::ProcessPositionInfoL(
    const TPositionInfo& aPositionInfo )
    {       
    // Get basic position data
    TPosition position;
    aPositionInfo.GetPosition(position);

    TBuf<KDegreeLength> latitudeDegr;
    GetDegreesString(position.Latitude(), latitudeDegr);

    TBuf<KDegreeLength> longitudeDegr;
    GetDegreesString(position.Longitude(), longitudeDegr);

    AddItemInListL(*iTextLat, latitudeDegr);
    AddItemInListL(*iTextLong, longitudeDegr);
    }


// -----------------------------------------------------------------------------
// CLocationExampleContainer::GetDegreesString
// Changes latitude or longitude represented as degrees to a string of 
// a form +DDD'MM''SS.SSSS
// -----------------------------------------------------------------------------
//

void CLocationExampleContainer::GetDegreesString(
    const TReal64& aDegrees,TBuf<KDegreeLength>& aDegreesString) const
    {
    const TReal KSecondsInMinute = 60.0;
    const TInt KNumWidth = 3;
    
    // If the aDegree is a proper number
    if ( !Math::IsNaN(aDegrees) )
        {
        // Integer part of the degrees
        TInt intDegrees = static_cast<TInt>(aDegrees);

        // Positive float of the degrees
        TReal64 realDegrees = aDegrees;
        
        // Convert to positive values
        if ( intDegrees < 0 )
            {
            intDegrees = -intDegrees;
            realDegrees = -realDegrees;
            }

        // Minutes
        TReal64 realMinutes = (realDegrees - intDegrees) * KSecondsInMinute;
          
        // Integer part of the minutes
        TInt intMinutes = static_cast<TInt>(realMinutes);

        // Seconds
        TReal64 realSeconds = (realMinutes - intMinutes) * KSecondsInMinute;
        TInt intSeconds = static_cast<TInt>((realMinutes - intMinutes) * KSecondsInMinute);

        // Check the sign of the result
        if ( aDegrees >= 0 )
            {
            aDegreesString.Append(KDelimPlus); 
            }
        else
            {
            aDegreesString.Append(KDelimMinus);
            }

        // Add the degrees
        TInt64 value = intDegrees;
        aDegreesString.AppendNum(value);

        // Add the separator
        aDegreesString.Append(KDelimDegree);
    
        // Add the minutes
        value = intMinutes;
        aDegreesString.AppendNum(value);

        // Add the separator
        aDegreesString.Append(KApostrophe);
        
        // Add the seconds
        value = intSeconds;
        aDegreesString.AppendNum(value);

        // Add the separator
        aDegreesString.Append(KDelimQuot);

        // Add the separator
        aDegreesString.Append(KDelimDot);
        
        // Get six last digits
        realSeconds -= intSeconds;
        realSeconds *= 1000;
        
        // Add the seconds
        aDegreesString.AppendNumFixedWidth(static_cast<TInt>(realSeconds), EDecimal, KNumWidth);
        }
    else
        {
        // The conversion can not be done, return NaN
        aDegreesString = KNan;
        }
    }


// -----------------------------------------------------------------------------
// CLocationExampleContainer::HandleResourceChange
// Handle Dynamic Screen Size change and Skin Change events and update
// controls accordingly. 
// -----------------------------------------------------------------------------
//
void CLocationExampleContainer::HandleResourceChange(TInt aType)
    {
    CCoeControl::HandleResourceChange(aType);
    switch( aType )
    	{
    	case KAknsMessageSkinChange:
        	{             
        	iListBox->DrawNow();
        	break;
        	}
    	case KEikDynamicLayoutVariantSwitch:
    		{
    		SetRect(iEikonEnv->EikAppUi()->ClientRect());
			DrawNow();
			break;
    		}
    	default:
    		{
    		break;
    		}
    	}
    }
    
// End of File