Humble Framework for SkyOS

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HTextEdit.h

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/****************************************************************************
**
**  $Header: /SkyOS.root/HFramework/HTextEdit.h 4     4/17/05 12:29p Lee Neuse $
**
****************************************************************************/
#ifndef HTEXTEDIT_H
#   define  HTEXTEDIT_H

#ifndef HWIDGET_H
#   include <HWidget.h>
#endif

class HTextEdit : public HWidget
    {
    typedef HWidget     base_class;
    static StringPtr    ClassName(void) { return "HTextEdit"; }
/*  ----------------------------------------------------------------------
    VARIABLES
    ----------------------------------------------------------------------  */
protected:
    bool                m_bReadOnly;    
    uint32              m_uTextLines;   
/*  ----------------------------------------------------------------------
    CTOR/DTOR
    ----------------------------------------------------------------------  */
public:
    HTextEdit(void) : HWidget(), m_bReadOnly(false), m_uTextLines(0)
        { /* STUB CTOR */ }

    virtual             
    ~HTextEdit(void)
        { Destroy(); }
/*  ----------------------------------------------------------------------
    MESSAGE HANDLERS
    ----------------------------------------------------------------------  */
protected:
    BEGIN_MSG_MAP("HTextEdit")
        CHAIN_MAP( base_class )
    END_MSG_MAP
/*  ----------------------------------------------------------------------
    METHODS
    ----------------------------------------------------------------------  */
public:
    ErrCode
    AddText(StringPtr pstr, bool bRedraw = true)
        {
        ErrCode         ec = HError::NoError();

        try
            {
            if (!IsValid())     
                ec = HError::Set(ERR_NOT_INITIALIZED, __FILE__, __LINE__);
            else if (NULL_PTR(pstr))    
                ec = HError::Set(ERR_BAD_PARAMETER, __FILE__, __LINE__);        
            else if (GI_widget_textfield_add_line(m_hMe, TEXT(pstr)) != S_OK)
                ec = HError::Set(ERR_API_ERROR, __FILE__, __LINE__);
            else    // all is well
                {
                m_uTextLines += STR_COUNT(pstr, '\n') + 1;
                if (bRedraw)
                    ec = redrawText();
                }
            }
        catch (const std::exception & e)
            {
            DEBUG_LOG("HTextEdit::AddText() => caught %s.\n", e.what());
            if ((ec = ErrCode(HError::GetLastError())) == NO_ERROR)
                ec = HError::Set(ERR_STL_EXCEPTION, __FILE__, __LINE__);
            }
        
        return ec;
        }
    ErrCode
    Create(HANDLE hParent, StringPtr pstrName, 
            HRect * prBounds = NULL, uint32 uStyle = 0)
        {
        ErrCode     ec = HError::NoError();
        
        ASSERT( NULL_HND(m_hMe) );  // Don't step on an existing textedit
        
        if (GOOD_HND(hParent))
            {
            int32           nX, nY,
                            nXDim, nYDim;
            
            if (NULL_PTR(prBounds) || prBounds->IsEmpty())
                nX = nY = nXDim = nYDim = 0;
            else
                {
                nX = prBounds->x1;
                nY = prBounds->y1;
                nXDim = prBounds->GetWidth();
                nYDim = prBounds->GetHeight();
                }

            m_bReadOnly = (uStyle & WGF_TEXTFIELD_DISABLE_INPUT) ? true : false;
            m_uTextLines = 0;
            m_hMe  = GI_create_widget_textfield(hParent, TEXT(pstrName), 
                                                nX, nY, nXDim, nYDim, 
                                                uStyle);
            if (GOOD_HND(m_hMe))
                {
                DEBUG_LOG(  "HTextEdit[%p]::Create() => m_hMe = 0x%08lX\n", 
                            this, int32(m_hMe));
                }
            else
                ec = HError::Set(ERR_API_ERROR, __FILE__, __LINE__);
            }
        else
            ec = HError::Set(ERR_BAD_PARAMETER, __FILE__, __LINE__);

        return ec;
        }
    ErrCode
    DeleteAllText(void)
        {
        ErrCode         ec = HError::NoError();
        
        if (IsValid())
            {
            if (GI_widget_textfield_delete(m_hMe) == S_OK)
                {
                m_uTextLines = 0;
                ec = redrawText();
                }
            else
                ec = HError::Set(ERR_API_ERROR, __FILE__, __LINE__);
            }
        else
            ec = HError::Set(ERR_NOT_INITIALIZED, __FILE__, __LINE__);
            
        return ec;
        }

protected:
    ErrCode
    redrawText(void) const
        {
        ErrCode ec = HError::NoError();
            
        if (IsValid()) 
            {
            if (GI_widget_textfield_redraw(m_hMe) != S_OK)
                ec = HError::Set(ERR_API_ERROR, __FILE__, __LINE__);
            }
        else
            ec = HError::Set(ERR_NOT_INITIALIZED, __FILE__, __LINE__);
        
        return ec;
        }
/*  ----------------------------------------------------------------------
    GETTERS & SETTERS
    ----------------------------------------------------------------------  */
public:
    inline uint32       GetLineCount(void) const
                            { return m_uTextLines; }
    ErrCode             SetLineBackColor(uint32 uLine, const HColor & color)
                            {
                            ErrCode     ec = HError::NoError();

                            if (IsValid())
                                {
                                if (isValidLine(uLine))
                                    {
                                    uLine--;    // make line # zero-relative
                                    if (GI_widget_textfield_set_line_backcolor(m_hMe, uLine, COLOR(color)) != S_OK)
                                        ec = HError::Set(ERR_API_ERROR, __FILE__, __LINE__);
                                    }
                                else
                                    ec = HError::Set(ERR_BAD_PARAMETER, __FILE__, __LINE__);
                                }
                            else
                                ec = HError::Set(ERR_NOT_INITIALIZED, __FILE__, __LINE__);
                            
                            return ec;
                            }
    ErrCode             SetReadOnly(bool bReadOnly)
                            {
                            ErrCode     ec = HError::NoError();
                            
                            m_bReadOnly = bReadOnly; 
                            if (IsValid() && 
                                GI_widget_textfield_set_rdonly(m_hMe, (bReadOnly ? 1 : 0)) != S_OK)
                                {
                                ec = HError::Set(ERR_API_ERROR, __FILE__, __LINE__);
                                }
                            
                            return ec;
                            }
/*  ----------------------------------------------------------------------
    INLINES
    ----------------------------------------------------------------------  */
public:
    inline bool         IsReadOnly(void) const
                            { return m_bReadOnly; }
protected:
    inline bool         isValidLine(uint32 uLine) const
                            { return (uLine > 0 && uLine <= m_uTextLines); }
    };

#endif  // HTEXTEDIT_H
/****************************************************************************
**
**  $History: HTextEdit.h $
 * 
 * *****************  Version 4  *****************
 * User: Lee Neuse    Date: 4/17/05    Time: 12:29p
 * Updated in $/SkyOS.root/HFramework
 * Development snapshot 050417
 * 
 * *****************  Version 3  *****************
 * User: Neusel       Date: 12/23/04   Time: 1:34p
 * Updated in $/SkyOS.root/pig/Humble
 * Posted as HFramework-debug 20041223
 * 
 * *****************  Version 2  *****************
 * User: Neusel       Date: 12/10/04   Time: 3:57p
 * Updated in $/SkyOS.root/pig/Humble
 * 20041210
 * 
 * *****************  Version 1  *****************
 * User: Neusel       Date: 12/08/04   Time: 5:06p
 * Created in $/SkyOS.root/pig/Humble
 * 20041208
**
**  -------------------------------------------------------------------------
**
**  End of HTextEdit.h
**
****************************************************************************/

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