} // SetHorizontalAlignment
//
// Calculate font baseline for baseline alignment.
//
private int GetFontBaseline(string strFont, int cptHeight)
{
int cyReturn;
// Fetch a Win32 DC.
IntPtr hdc = GdiGraphics.GetDC(m_hwndForm);
// Create a Win32 font.
IntPtr hfont = GdiFont.Create(hdc, strFont, cptHeight, 0);
// Select font into DC.
IntPtr hfontOld = GdiGraphics.SelectObject(hdc, hfont);
// Allocate font metric structure.
GdiFont.TEXTMETRIC tm =
new GdiFont.TEXTMETRIC();
// Fetch font metrics.
GdiFont.GetTextMetrics(hdc, ref tm);
// Fetch return value.
cyReturn = tm.tmAscent;
// Disconnect font from DC -- *Critical* because....
GdiGraphics.SelectObject(hdc, hfontOld);
// ... clean up of Win32 font object requires font to
// be disconnected from any and all DCs.
GdiGraphics.DeleteObject(hfont);
// Disconnect from Win32 DC.
GdiGraphics.ReleaseDC(m_hwndForm, hdc);
return(cyReturn);
} // GetFontBaseline
//--------------------------------------------------------
public static void PrintText(TextBox textIn, IntPtr hdc)
{
// Split input data into separate lines of text.
char [] achNewLine = new char[] { '\n' };
String [] astrSplit;
astrSplit = textIn.Text.Split(achNewLine);
// Calculate longest string in the document
int cchMax = 0;
int cstr = astrSplit.Length;
for (int i = 0; i < cstr; i++)
{
if (astrSplit[i].Length > cchMax)
{
cchMax = astrSplit[i].Length;
}
}
// Allocate conversion buffers.
byte[] byteData = new Byte[cchMax];
char[] chData = new Char[cchMax];
System.Text.Encoder d;
d = System.Text.Encoding.UTF8.GetEncoder();
// Get device resolution
int cxyInch =
GdiGraphics.GetDeviceCaps(hdc, CAPS.LOGPIXELSY);
// In draft mode, the PCL driver returns wrong value.
if (cxyInch == 0)
{
cxyInch = 150;
}
// Calculate page size.
int cxPhysPage =
GdiGraphics.GetDeviceCaps(hdc, CAPS.PHYSICALWIDTH);
int cyPhysPage =
GdiGraphics.GetDeviceCaps(hdc, CAPS.PHYSICALHEIGHT);
int cxOff =
GdiGraphics.GetDeviceCaps(hdc, CAPS.PHYSICALOFFSETX);
int cyOff =
GdiGraphics.GetDeviceCaps(hdc, CAPS.PHYSICALOFFSETY);
// Calculate line height.
TEXTMETRIC tm = new TEXTMETRIC();
GdiFont.GetTextMetrics(hdc, ref tm);
int cyLineHeight = tm.tmHeight + tm.tmExternalLeading;
// Init text drawing coordinates;
int xText = cxyInch - cxOff;
int yText = cxyInch - cyOff;
// Calculate page boundaries
int yFirst = yText;
int yLast = cyPhysPage - cxyInch;
// Notify GDI of document and page start.
DOCINFO di = new DOCINFO();
di.cbSize = Marshal.SizeOf(di);
Printing.StartDoc(hdc, ref di);
Printing.StartPage(hdc);
try
{
// Set iEnd -- trim extra carriage-return from text
int iEnd = 0;
int cchString = astrSplit[0].Length;
char ch = astrSplit[0][cchString - 1];
if (ch == '\r')
{
iEnd = -1;
}
// Loop through list of strings.
for (int i = 0; i < cstr; i++)
{
cchString = astrSplit[i].Length;
if (cchString > 0)
{
// Draw line of text.
GdiGraphics.ExtTextOut(hdc, xText, yText, 0,
IntPtr.Zero, astrSplit[i], cchString + iEnd,
IntPtr.Zero);
}
// Advance to next line.
yText += cyLineHeight;
// Skip to next page (if not at document end)
if (yText >= yLast && (i + 1) < cstr)
{
Printing.EndPage(hdc);
Printing.StartPage(hdc);
yText = yFirst;
}
}
}
finally
{
// End of page & end of document.
Printing.EndPage(hdc);
Printing.EndDoc(hdc);
}
} // PrintText()