httpexamplecontainer.cpp

symbian 平台下完整的http网络通讯例子。

/**
*
* @brief Definition of CHTTPExampleContainer
*
* Copyright (c) EMCC Software Ltd 2003
* @version 1.0
*/

// INCLUDE FILES

// Class include
#include "HTTPExampleContainer.h"

// System includes
#include <eikedwin.h>       // CEikEdwin::EReadOnly
#include <eikrted.h>        // CEikRichTextEditor
#include <stringloader.h>   // StringLoader

// CONSTANTS
const TInt KEditorMaxLines = 6;
const TInt KEditorMaxChars = 0;


// ================= MEMBER FUNCTIONS =======================

/**
* Symbian OS 2nd phase constructor.  Creates a Window for the controls, which it contains.
* Constructs a label and adds it to the window, which it then activates.
* @param aRect The rectangle for this window
*/
void CHTTPExampleContainer::ConstructL(const TRect& aRect)
    {
    CreateWindowL();

    iEditor = new (ELeave) CEikRichTextEditor;
    iEditor->SetContainerWindowL(*this);
    iEditor->ConstructL(this, KEditorMaxLines, KEditorMaxChars,
        CEikEdwin::EReadOnly|CEikEdwin::ELineCursor|CEikEdwin::ENoAutoSelection);
    iEditor->ActivateL();

    // Add a scrollbar if necessary.  N.B. We don't take ownership of 
    // this despite the pointer.
    CEikScrollBarFrame* scrollBarFrame = iEditor->CreatePreAllocatedScrollBarFrameL();
    scrollBarFrame->SetScrollBarVisibilityL(CEikScrollBarFrame::EOff, CEikScrollBarFrame::EAuto);
    iEditor->SetFocus(ETrue);


    SetRect(aRect);
    ActivateL();
    }

/**
* Symbian OS 2 phase constructor.
* Constructs the CHTTPExampleContainer using the NewLC method, popping
* the constructed object from the CleanupStack before returning it.
*
* @param aRect The rectangle for this window
* @return The newly constructed CHTTPExampleContainer
*/
CHTTPExampleContainer* CHTTPExampleContainer::NewL(const TRect& aRect)
    {
    CHTTPExampleContainer* self = new (ELeave) CHTTPExampleContainer;
    CleanupStack::PushL(self);
    self->ConstructL(aRect);
    CleanupStack::Pop(self);
    return self;
    }

/**
* Destructor.  Frees up memory for the iLabel.
*/
CHTTPExampleContainer::~CHTTPExampleContainer()
    {
    delete iEditor;
    }

/**
*
* Called by framework when the view size is changed.  Resizes the
* iLabel accordingly.
*
*/
void CHTTPExampleContainer::SizeChanged()
    {
    iEditor->SetRect(Rect());
    }

/**
* Called by the framework in compound controls
* @return The number of controls in this CHTTPExampleContainer
*/
TInt CHTTPExampleContainer::CountComponentControls() const
    {
    return 1; // return number of controls inside this container
    }

/**
* Called by the framework in compound controls
* @param The index of the control to return
* @return The control for aIndex
*/
CCoeControl* CHTTPExampleContainer::ComponentControl(TInt aIndex) const
    {
    switch (aIndex)
        {
        case 0:
            return iEditor;
        default:
            return NULL;
        }
    }

/**
* Called by the framework to draw this control.  Clears the area in
* aRect.
* @param aRect in which to draw
*/
void CHTTPExampleContainer::Draw(const TRect& aRect) const
    {
    CWindowGc& gc = SystemGc();
    gc.Clear(aRect);
    }

/**
* Set the text in the rich text editor control.
* @param aText Text to insert into the rich text editor
*/
void CHTTPExampleContainer::SetTextL(const TDesC& aText)
    {
    iEditor->SetTextL(&aText);
    }


/**
* Override of CCoeControl method to handle key events.
*/
TKeyResponse CHTTPExampleContainer::OfferKeyEventL(const TKeyEvent& aKeyEvent, TEventCode aType)
    {
    if ((iEditor != NULL) && (aType == EEventKey))
		{
        if (aKeyEvent.iCode == EKeyDownArrow)
            {
            iEditor->MoveCursorL(TCursorPosition::EFPageDown, EFalse);
            }
        else if (aKeyEvent.iCode == EKeyUpArrow)
            {
            iEditor->MoveCursorL(TCursorPosition::EFPageUp, EFalse);
            }
		else
            {
			iEditor->OfferKeyEventL(aKeyEvent, aType);
            }
        return EKeyWasConsumed;
        }
    return EKeyWasNotConsumed;
    }


// End of File