tabtext.cpp

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    GetMBR(dXMin, dYMin, dXMax, dYMax);

    poMapFile->Coordsys2Int(dXMin, dYMin, nXMin, nYMin);
    poMapFile->Coordsys2Int(dXMax, dYMax, nXMax, nYMax);

    // Label line end point
    double dX, dY;
    GetTextLineEndPoint(dX, dY); // Make sure a default line end point is set
    poMapFile->Coordsys2Int(m_dfLineEndX, m_dfLineEndY, 
                           poTextHdr->m_nLineEndX, poTextHdr->m_nLineEndY);

    // Text Height
    poMapFile->Coordsys2IntDist(0.0, m_dHeight, nX, nY);
    poTextHdr->m_nHeight = nY;

    // Font name
    m_nFontDefIndex = poMapFile->WriteFontDef(&m_sFontDef);
    poTextHdr->m_nFontId = m_nFontDefIndex;      // Font name index

    // MBR after rotation
    poTextHdr->SetMBR(nXMin, nYMin, nXMax, nYMax);

    m_nPenDefIndex = poMapFile->WritePenDef(&m_sPenDef);
    poTextHdr->m_nPenId = m_nPenDefIndex;      // Pen index for line/arrow


    if (UGKGetLastErrorNo() != 0)
        return -1;

    return 0;
}


/**********************************************************************
 *                   TABText::GetTextString()
 *
 * Return ref to text string value.
 *
 * Returned string is a reference to the internal string buffer and should
 * not be modified or freed by the caller.
 **********************************************************************/
const char *TABText::GetTextString()
{
    if (m_pszString == NULL)
        return "";

    return m_pszString;
}


/**********************************************************************
 *                   TABText::SetTextString()
 *
 * Set new text string value.
 *
 * Note: The text string may contain "\n" chars or "\\" chars
 * and we expect to receive them in a 2 chars escaped form as 
 * described in the MIF format specs.
 **********************************************************************/
void TABText::SetTextString(const char *pszNewStr)
{
    UGK_Free(m_pszString);
    m_pszString = UGKStrdup(pszNewStr);
}



/**********************************************************************
 *                   TABText::GetTextAngle()
 *
 * Return text angle in degrees.
 **********************************************************************/
double TABText::GetTextAngle()
{
    return m_dAngle;
}

void TABText::SetTextAngle(double dAngle)
{
    // Make sure angle is in the range [0..360]
    while(dAngle < 0.0)   dAngle += 360.0;
    while(dAngle > 360.0) dAngle -= 360.0;
    m_dAngle = dAngle;
    UpdateTextMBR();
}


/**********************************************************************
 *                   TABText::GetTextBoxHeight()
 *
 * Return text height in Y axis coord. units of the text box before rotation.
 **********************************************************************/
double TABText::GetTextBoxHeight()
{
    return m_dHeight;
}

void TABText::SetTextBoxHeight(double dHeight)
{
    m_dHeight = dHeight;
    UpdateTextMBR();
}


/**********************************************************************
 *                   TABText::GetTextBoxWidth()
 *
 * Return text width in X axis coord. units. of the text box before rotation.
 *
 * If value has not been set, then we force a default value that assumes
 * that one char's box width is 60% of its height... and we ignore
 * the multiline case.  This should not matter when the user PROPERLY sets
 * the value.
 **********************************************************************/
double TABText::GetTextBoxWidth()
{
    if (m_dWidth == 0.0 && m_pszString)
    {
        m_dWidth = 0.6 * m_dHeight * strlen(m_pszString);
    }
    return m_dWidth;
}

void TABText::SetTextBoxWidth(double dWidth)
{
    m_dWidth = dWidth;
    UpdateTextMBR();
}



/**********************************************************************
 *                   TABText::GetTextLineEndPoint()
 *
 * Return X,Y coordinates of the text label line end point.
 * Default is the center of the text MBR.
 **********************************************************************/
void TABText::GetTextLineEndPoint(double &dX, double &dY)
{
    if (!m_bLineEndSet)
    {
        // Set default location at center of text MBR
        double dXMin, dYMin, dXMax, dYMax;
        UpdateTextMBR();
        GetMBR(dXMin, dYMin, dXMax, dYMax);
        m_dfLineEndX = (dXMin + dXMax) /2.0;
        m_dfLineEndY = (dYMin + dYMax) /2.0;
        m_bLineEndSet = TRUE;
    }

    // Return values
    dX = m_dfLineEndX;
    dY = m_dfLineEndY;
}

void TABText::SetTextLineEndPoint(double dX, double dY)
{
    m_dfLineEndX = dX;
    m_dfLineEndY = dY;
    m_bLineEndSet = TRUE;
}



/**********************************************************************
 *                   TABText::UpdateTextMBR()
 *
 * Update the feature MBR using the text origin (UGKPoint geometry), the
 * rotation angle, and the Width/height before rotation.
 *
 * This function cannot perform properly unless all the above have been set.
 **********************************************************************/
void TABText::UpdateTextMBR()
{
    UGKGeometry *poGeom;
    UGKPoint *poPoint=NULL;

    poGeom = GetGeometryRef();
    if (poGeom && wkbFlatten(poGeom->getGeometryType()) == wkbPoint)
    {
        double dSin, dCos, dX0, dY0, dX1, dY1;
        double dX[4], dY[4];
        poPoint = (UGKPoint *)poGeom;

        dX0 = poPoint->getX();
        dY0 = poPoint->getY();

        dSin = sin(m_dAngle*PI/180.0);
        dCos = cos(m_dAngle*PI/180.0);

        GetTextBoxWidth();  // Force default width value if necessary.
        
        dX[0] = dX0;
        dY[0] = dY0;
        dX[1] = dX0 + m_dWidth;
        dY[1] = dY0;
        dX[2] = dX0 + m_dWidth;
        dY[2] = dY0 + m_dHeight;
        dX[3] = dX0;
        dY[3] = dY0 + m_dHeight;

        SetMBR(dX0, dY0, dX0, dY0);
        for(int i=0; i<4; i++)
        {
            // Rotate one of the box corners
            dX1 = dX0 + (dX[i]-dX0)*dCos - (dY[i]-dY0)*dSin;
            dY1 = dY0 + (dX[i]-dX0)*dSin + (dY[i]-dY0)*dCos;

            // And update feature MBR with rotated coordinate
            if (dX1 < m_dXMin) m_dXMin = dX1;
            if (dX1 > m_dXMax) m_dXMax = dX1;
            if (dY1 < m_dYMin) m_dYMin = dY1;
            if (dY1 > m_dYMax) m_dYMax = dY1;
        }
    }
}



/**********************************************************************
 *                   TABText::GetFontBGColor()
 *
 * Return background color.
 **********************************************************************/
UGKInt32 TABText::GetFontBGColor()
{
    return m_rgbBackground;
}

void TABText::SetFontBGColor(UGKInt32 rgbColor)
{
    m_rgbBackground = rgbColor;
}


/**********************************************************************
 *                   TABText::GetFontFGColor()
 *
 * Return foreground color.
 **********************************************************************/
UGKInt32 TABText::GetFontFGColor()
{
    return m_rgbForeground;
}

void TABText::SetFontFGColor(UGKInt32 rgbColor)
{
    m_rgbForeground = rgbColor;
}


/**********************************************************************
 *                   TABText::GetTextJustification()
 *
 * Return text justification.  Default is TABTJLeft
 **********************************************************************/
TABTextJust TABText::GetTextJustification()
{
    TABTextJust eJust = TABTJLeft;

    if (m_nTextAlignment & 0x0200)
        eJust = TABTJCenter;
    else if (m_nTextAlignment & 0x0400)
        eJust = TABTJRight;

    return eJust;
}

void TABText::SetTextJustification(TABTextJust eJustification)
{
    // Flush current value... default is TABTJLeft
    m_nTextAlignment &= ~ 0x0600;
    // ... and set new one.
    if (eJustification == TABTJCenter)
        m_nTextAlignment |= 0x0200;
    else if (eJustification == TABTJRight)
        m_nTextAlignment |= 0x0400;
}


/**********************************************************************
 *                   TABText::GetTextSpacing()
 *
 * Return text vertical spacing factor.  Default is TABTSSingle
 **********************************************************************/
TABTextSpacing TABText::GetTextSpacing()
{
    TABTextSpacing eSpacing = TABTSSingle;

    if (m_nTextAlignment & 0x0800)
        eSpacing = TABTS1_5;
    else if (m_nTextAlignment & 0x1000)
        eSpacing = TABTSDouble;

    return eSpacing;
}

void TABText::SetTextSpacing(TABTextSpacing eSpacing)
{
    // Flush current value... default is TABTSSingle
    m_nTextAlignment &= ~ 0x1800;
    // ... and set new one.
    if (eSpacing == TABTS1_5)
        m_nTextAlignment |= 0x0800;
    else if (eSpacing == TABTSDouble)
        m_nTextAlignment |= 0x1000;
}

/**********************************************************************
 *                   TABText::GetTextLineType()
 *
 * Return text line (arrow) type.  Default is TABTLNoLine
 **********************************************************************/
TABTextLineType TABText::GetTextLineType()
{
    TABTextLineType eLine = TABTLNoLine;

    if (m_nTextAlignment & 0x2000)
        eLine = TABTLSimple;
    else if (m_nTextAlignment & 0x4000)
        eLine = TABTLArrow;

    return eLine;
}

void TABText::SetTextLineType(TABTextLineType eLineType)
{
    // Flush current value... default is TABTLNoLine
    m_nTextAlignment &= ~ 0x6000;
    // ... and set new one.
    if (eLineType == TABTLSimple)
        m_nTextAlignment |= 0x2000;
    else if (eLineType == TABTLArrow)
        m_nTextAlignment |= 0x4000;
}



/**********************************************************************
 *                   TABText::QueryFontStyle()
 *
 * Return TRUE if the specified font style attribute is turned ON,
 * or FALSE otherwise.  See enum TABFontStyle for the list of styles
 * that can be queried on.
 **********************************************************************/
UGKBool TABText::QueryFontStyle(TABFontStyle eStyleToQuery)
{
    return (m_nFontStyle & (int)eStyleToQuery) ? TRUE: FALSE;
}

void TABText::ToggleFontStyle(TABFontStyle eStyleToToggle, UGKBool bStyleOn)
{
    if (bStyleOn)
        m_nFontStyle |=  (int)eStyleToToggle;
    else
        m_nFontStyle &=  ~ (int)eStyleToToggle;
}



/**********************************************************************
 *                   TABText::GetFontStyleMIFValue()
 *
 * Return the Font Style value for this object using the style values
 * that are used in a MIF FONT() clause.  See MIF specs (appendix A).
 *
 * The reason why we have to differentiate between the TAB and the MIF font
 * style values is that in TAB, TABFSBox is included in the style value
 * as code 0x100, but in MIF it is not included, instead it is implied by
 * the presence of the BG color in the FONT() clause (the BG color is 
 * present only when TABFSBox or TABFSHalo is set).
 * This also has the effect of shifting all the other style values > 0x100
 * by 1 byte.
 **********************************************************************/
int TABText::GetFontStyleMIFValue()
{
    // The conversion is simply to remove bit 0x100 from the value and shift
    // down all values past this bit.
    return (m_nFontStyle & 0xff) + (m_nFontStyle & (0xff00-0x0100))/2;
}

void TABText:: SetFontStyleMIFValue(int nStyle, UGKBool bBGColorSet)
{
    m_nFontStyle = (nStyle & 0xff) + (nStyle & 0x7f00)*2;
    // When BG color is set, then either BOX or HALO should be set.
    if (bBGColorSet && !QueryFontStyle(TABFSHalo))
        ToggleFontStyle(TABFSBox, TRUE);
}

int TABText::IsFontBGColorUsed()
{
    // Font BG color is used only when BOX or HALO are set.
    return (QueryFontStyle(TABFSBox) || QueryFontStyle(TABFSHalo));
}


/**********************************************************************
 *                   TABText::GetLabelStyleString()
 *
 * This is not the correct location, it should be in ITABFeatureFont,
 * but it's really more easy to put it here.  This fct return a complete
 * string for the representation with the string to display
 **********************************************************************/
const char *TABText::GetLabelStyleString()
{
    const char *pszStyle = NULL;
    char szPattern[20];
    int nJustification = 1;
    
    szPattern[0] = '\0';
    

    switch(GetTextJustification())
    {
      case TABTJCenter:
        nJustification = 2;
        break;
      case TABTJRight:
        nJustification = 1;
        break;
      case TABTJLeft:
      default:
        nJustification =1;
        break;
    }

    // Compute real font size, taking number of lines ("\\n") and line
    // spacing into account.
    int numLines = 1;
    const char *pszNewline = GetTextString();
    while((pszNewline = strstr(pszNewline, "\\n")) != NULL)
    {
        numLines++;