fontsandtextbasiccontainer.cpp

来自「series60 应用程序开发的源代码 series60 应用程序开发的源代码」· C++ 代码 · 共 103 行

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

// INCLUDE FILES

// Class includes
#include "FontsAndTextBasicContainer.h"

// System includes
#include <eikenv.h>            // CEikonEnv iEikonEnv
#include <FontsAndText.rsg>    // R_FONTSANDTEXT_LOCALIZATION_TEXT
#include <StringLoader.h>    // StringLoader

// CONSTANTS
const TInt KHorizOffset = 5;
const TInt KVertOffset = 2;
const TInt KTextMaxLength = 50;

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

/**
 * Symbian OS 2 phase constructor.
 * Constructs the CFontsAndTextBasicContainer 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 CFontsAndTextBasicContainer
 */
CFontsAndTextBasicContainer* CFontsAndTextBasicContainer::NewL(const TRect& aRect)
{
    CFontsAndTextBasicContainer* self = CFontsAndTextBasicContainer::NewLC(aRect);
    CleanupStack::Pop(self);
    return self;
}

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

/**
 * Symbian OS 2nd phase constructor.  Creates a Window for the control to draw to.
 * Activates the control
 * @param aRect The rectangle for this window
 */ 
void CFontsAndTextBasicContainer::ConstructL(const TRect& aRect)
{
    CreateWindowL();    
    SetRect(aRect);
    ActivateL();
}

/**
 * Destructor.
 */
CFontsAndTextBasicContainer::~CFontsAndTextBasicContainer()
{

}

/**
 * This draw function obtains a handle to a graphics context and clears it
 * Using the 'Normal Font' of the system a text string is drawn
 * 
 * @param aRect the rectangular area to draw in. Used to position text
 */
void CFontsAndTextBasicContainer::Draw(const TRect& aRect) const
{
    // Obtain graphics context and clear it
    CWindowGc& gc = SystemGc();
    gc.Clear();

    // Set position of text relative to the rectangle of the control
    TPoint textPoint(aRect.Width() / KHorizOffset, aRect.Height() / KVertOffset);

    // Use resource architecture to obtain localizable string
    TBuf<KTextMaxLength> text;
    StringLoader::Load(text, R_FONTSANDTEXT_LOCALIZATION_TEXT);

    // Gain handle to Normal font of the system
    const CFont* normalFont = iEikonEnv->NormalFont(); 
    gc.UseFont(normalFont);    

    gc.DrawText(text, textPoint);    // Draw text
    gc.DiscardFont();    // Discard font
}