////////////////////////////////////////////////////////////////////
// Draw text within text box center or right justified
////////////////////////////////////////////////////////////////////
private Double DrawText(
Double PosX,
Double PosY,
Double Width,
TextBoxJustify Justify,
TextBoxLine Line,
PdfPage Page
)
{
Double LineWidth = 0;
foreach(TextBoxSeg Seg in Line.SegArray) LineWidth += Seg.SegWidth;
Double SegPosX = PosX;
if(Justify == TextBoxJustify.Right) SegPosX += Width - LineWidth;
else SegPosX += 0.5 * (Width - LineWidth);
foreach(TextBoxSeg Seg in Line.SegArray)
{
Double SegWidth = DrawText(Seg.Font, Seg.FontSize, SegPosX, PosY, TextJustify.Left, Seg.DrawStyle, Seg.FontColor, Seg.Text);
if(Seg.WebLink != null)
{
if(Page == null) throw new ApplicationException("TextBox with WebLink. You must call DrawText with PdfPage");
Page.AddWebLink(SegPosX, PosY - Seg.Font.DescentPlusLeading(Seg.FontSize), SegPosX + SegWidth, PosY + Seg.Font.AscentPlusLeading(Seg.FontSize), Seg.WebLink);
}
SegPosX += SegWidth;
}
return(SegPosX - PosX);
}
////////////////////////////////////////////////////////////////////
// Draw Text for TextBox with web link
////////////////////////////////////////////////////////////////////
/// <summary>
/// Draw TextBox
/// </summary>
/// <param name="PosX">Position X</param>
/// <param name="PosYTop">Position Y (by reference)</param>
/// <param name="PosYBottom">Position Y bottom</param>
/// <param name="LineNo">Start at line number</param>
/// <param name="LineExtraSpace">Extra line spacing</param>
/// <param name="ParagraphExtraSpace">Extra paragraph spacing</param>
/// <param name="Justify">TextBox justify enumeration</param>
/// <param name="TextBox">TextBox</param>
/// <param name="Page">Page if TextBox contains web link segment</param>
/// <returns>Next line number</returns>
/// <remarks>
/// Before calling this method you must add text to a TextBox object.
/// <para>
/// Set the PosX and PosYTop to the left top corner of the text area.
/// Note PosYTop is by reference. This variable will be updated to
/// the next vertical line position after the method was executed.
/// </para>
/// <para>
/// Set the PosYBottom to the bottom of your page. The method will
/// not print below this value.
/// </para>
/// <para>
/// Set the LineNo to the first line to be printed. Initially
/// this will be zero. After the method returns, PosYTop is set
/// to next print line on the page and LineNo is set to next line
/// within the box.
/// </para>
/// <para>
/// If LineNo is equals to TextBox.LineCount the box was fully printed.
/// </para>
/// <para>
/// If LineNo is less than TextBox.LineCount box printing was not
/// done. Start a new PdfPage and associated PdfContents. Set
/// PosYTop to desired start position. Set LineNo to the value
/// returned by this method, and call the method again.
/// </para>
/// <para>
/// If your TextBox contains WebLink segment you must supply
/// Page argument and position X and Y must be relative to
/// page bottom left corner.
/// </para>
/// <para>
/// TextBoxJustify controls horizontal justification. FitToWidth
/// will display a straight right edge.
/// </para>
/// </remarks>
////////////////////////////////////////////////////////////////////
public Int32 DrawText(
Double PosX,
ref Double PosYTop,
Double PosYBottom,
Int32 LineNo,
Double LineExtraSpace,
Double ParagraphExtraSpace,
TextBoxJustify Justify,
TextBox TextBox,
PdfPage Page = null
)
{
TextBox.Terminate();
for(; LineNo < TextBox.LineCount; LineNo++)
{
// short cut
TextBoxLine Line = TextBox[LineNo];
// break out of the loop if printing below bottom line
if(PosYTop - Line.LineHeight < PosYBottom) break;
// adjust PosY to font base line
PosYTop -= Line.Ascent;
// text horizontal position
Double X = PosX;
Double W = TextBox.BoxWidth;
// if we have first line indent, adjust text x position for first line of a paragraph
if(TextBox.FirstLineIndent != 0 && (LineNo == 0 || TextBox[LineNo - 1].EndOfParagraph))
{
X += TextBox.FirstLineIndent;
W -= TextBox.FirstLineIndent;
}
// draw text to fit box width
if(Justify == TextBoxJustify.FitToWidth && !Line.EndOfParagraph)
{
DrawText(X, PosYTop, W, Line, Page);
}
// draw text center or right justified
else if(Justify == TextBoxJustify.Center || Justify == TextBoxJustify.Right)
{
DrawText(X, PosYTop, W, Justify, Line, Page);
}
// draw text normal
else
{
DrawText(X, PosYTop, Line, Page);
}
// advance position y to next line
PosYTop -= Line.Descent + LineExtraSpace;
if(Line.EndOfParagraph) PosYTop -= ParagraphExtraSpace;
}
return(LineNo);
}
