richtexteditorrichtexteditor.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 162 行

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

// INCLUDE FILES

// Class include
#include "RichTextEditorRichTextEditor.h"

// System includes
#include <barsread.h> // TResourceReader
#include <RichTextEditor.rsg> // resources
#include <eikrted.h> // CEikRichTextEditor
//#include <gdi.h> // TFontStyle
#include <txtrich.h> // CRichText

// ================= 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.
*/
void CRichTextEditorRichTextEditor::ConstructL()
{
    TResourceReader reader;
    iCoeEnv->CreateResourceReaderLC(reader, R_RICHTEXTEDITOR_RICH_TEXT_EDITOR);
    ConstructFromResourceL(reader);
    CleanupStack::PopAndDestroy(); // reader
    SetFocus(ETrue);
}


/**
* Moves the cursor to the top of the editor    scrolling any text as necessary
* This should be called after the container window is activated
*/
void CRichTextEditorRichTextEditor::DisplayStartOfHelpTextL()
{
    SetCursorPosL(0, EFalse);
}

/**
* Sets underline on or off.  This will be applied to text added in AddText()
* @param aOn ETrue to switch underline on, EFalse to switch it off
*/
void CRichTextEditorRichTextEditor::SetUnderlineOn(TBool aOn)
{
    iCharFormatMask.SetAttrib(EAttFontUnderline);
    if (aOn)
    {
        iCharFormat.iFontPresentation.iUnderline = EUnderlineOn;
    }
    else
    {
        iCharFormat.iFontPresentation.iUnderline = EUnderlineOff;
    }
}

/**
* Sets bold on or off.  This will be applied to text added in AddText()
* @param aOn ETrue to switch bold on, EFalse to switch it off
*/
void CRichTextEditorRichTextEditor::SetBoldOn(TBool aOn)
{
    iCharFormatMask.SetAttrib(EAttFontStrokeWeight);

    if (aOn)
    {
        iCharFormat.iFontSpec.iFontStyle.SetStrokeWeight(EStrokeWeightBold);
    }
    else
    {
        iCharFormat.iFontSpec.iFontStyle.SetStrokeWeight(EStrokeWeightNormal);
    }
}

/**
* Appends a carriage return to the rich text in this editor
*/
void CRichTextEditorRichTextEditor::AddCarriageReturnL()
{
    CRichText* richText = RichText();
    richText->InsertL(richText->DocumentLength(), CEditableText::ELineBreak);
}

/**
* Appends the supplied text to the rich text in this editor
* Applies any formatting set in other methods, e.g. bold
*/
void CRichTextEditorRichTextEditor::AddTextL(const TDesC& aText)
{
    CRichText* richText = RichText();
    TInt documentLength = richText->DocumentLength();
    richText->InsertL (documentLength, aText);
    richText->ApplyCharFormatL(iCharFormat, iCharFormatMask,documentLength,aText.Length());
}

/**
* Symbian OS 2 phase constructor.
* Constructs the CRichTextEditorRichTextEditor using the NewLC method, popping
* the constructed object from the CleanupStack before returning it.
*
* @return The newly constructed CRichTextEditorRichTextEditor
*/
CRichTextEditorRichTextEditor* CRichTextEditorRichTextEditor::NewL()
{
    CRichTextEditorRichTextEditor* self = CRichTextEditorRichTextEditor::NewLC();
    CleanupStack::Pop(self);
    return self;
}

/**
* Symbian OS 2 phase constructor.
* Constructs the CRichTextEditorRichTextEditor using the constructor and ConstructL
* method, leaving the constructed object on the CleanupStack before returning it.
*
* @return The newly constructed CRichTextEditorRichTextEditor
*/
CRichTextEditorRichTextEditor* CRichTextEditorRichTextEditor::NewLC()
{
    CRichTextEditorRichTextEditor* self = new (ELeave) CRichTextEditorRichTextEditor;
    CleanupStack::PushL(self);
    self->ConstructL();
    return self;
}

/**
* Called by the framework whenever a key event occurs.
* If the key is the up or down scroller, moves the page up or down respectively and returns EKeyWasConsumed.
* Otherwise, passes the key event to the superclass to handle.
* @param aKeyEvent the Key event which occured, e.g. select key pressed
* @param aType the type of Key event which occurred, e.g. key up, key down
* @return TKeyResponse EKeyWasNotConsumed if the key was not processed, EKeyWasConsumed if it was
*/
TKeyResponse CRichTextEditorRichTextEditor::OfferKeyEventL(const TKeyEvent& aKeyEvent,TEventCode aType)
{
    if (aType == EEventKey)
    {
        if (aKeyEvent.iCode == EKeyDownArrow)
        {
            MoveCursorL (TCursorPosition::EFPageDown, EFalse);
            return EKeyWasConsumed;
        }
        else if (aKeyEvent.iCode == EKeyUpArrow)
        {
            MoveCursorL (TCursorPosition::EFPageUp, EFalse);
            return EKeyWasConsumed;
        }
        else
        {
            return CEikRichTextEditor::OfferKeyEventL(aKeyEvent, aType);
        }
    }
    return EKeyWasNotConsumed;
}

// End of File