} // 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
cmdFanBlade_Click(object sender, EventArgs e)
{
int cIncrement = degRotate;
if (cIncrement == 0)
{
cIncrement = 45;
}
IntPtr hdc = GdiGraphics.GetDC(m_hwndForm);
for (int i = 0; i < 360; i += cIncrement)
{
IntPtr hfont = GdiFont.Create(hdc, "Tahoma", 12, i);
IntPtr hfontOld = GdiGraphics.SelectObject(hdc, hfont);
GdiGraphics.ExtTextOut(hdc, m_xText, m_yText, 0,
IntPtr.Zero, "Rotated Text", 12, IntPtr.Zero);
GdiGraphics.SelectObject(hdc, hfontOld);
GdiGraphics.DeleteObject(hfont);
}
GdiGraphics.ReleaseDC(m_hwndForm, hdc);
}
FormMain_Paint(object sender, PaintEventArgs e)
{
// Fetch a Win32 DC.
IntPtr hdc = GdiGraphics.GetDC(m_hwndForm);
// Create a Win32 font.
IntPtr hfont = GdiFont.Create(hdc, "Tahoma", 12, m_degRotate);
// Select font into DC.
IntPtr hfontOld = GdiGraphics.SelectObject(hdc, hfont);
// Draw using Win32 text drawing function.
GdiGraphics.ExtTextOut(hdc, m_xText, m_yText, 0,
IntPtr.Zero, "Rotated Text", 12, IntPtr.Zero);
// 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);
}
mitemFilePrint_Click(object sender, EventArgs e)
{
// Display dialog to select printer & port.
PAGESETUPDLGSTRUCT psd;
psd = new PAGESETUPDLGSTRUCT();
PrintSetupDlg.InitDlgStruct(ref psd, hwndForm);
int iErr = PrintSetupDlg.ShowDialog(ref psd);
if (iErr == 0)
{
// Either error...
string strErr = PrintSetupDlg.GetErrorString();
if (strErr != "Ok")
{
MessageBox.Show(strErr, "PrintGdi");
}
// ...Or user clicked <Cancel>
return;
}
IntPtr hdcPrinter = IntPtr.Zero;
IntPtr hfont = IntPtr.Zero;
IntPtr hfontOld = IntPtr.Zero;
try
{
// Connect to printer by creating a DC.
hdcPrinter = Printing.CreatePrinterDC(ref psd);
if (hdcPrinter != IntPtr.Zero)
{
// Select font.
hfont = GdiFont.Create(tboxInput.Font.Name,
(int)tboxInput.Font.Size, 0, hdcPrinter);
hfontOld = GdiGraphics.SelectObject(hdcPrinter, hfont);
// Print
PrintJob_Gdi.PrintText(tboxInput, hdcPrinter);
}
else
{
throw new System.Exception();
}
}
catch
{
MessageBox.Show("Error connecting to printer.", "PrintGdi");
}
finally
{
// Cleanup
GdiGraphics.SelectObject(hdcPrinter, hfontOld);
GdiGraphics.DeleteObject(hfont);
Printing.DeleteDC(hdcPrinter);
// Clean up resources associated with print dialog.
PrintSetupDlg.Close(ref psd);
}
}
mitemFilePrint_Click(object sender, EventArgs e)
{
IntPtr hdcPrinter = IntPtr.Zero;
IntPtr hfont = IntPtr.Zero;
IntPtr hfontOld = IntPtr.Zero;
try
{
// Connect to printer by creating a DC.
hdcPrinter = mPrint.mPrintRenderWrapper.CreatePrinterContext();
if (hdcPrinter != IntPtr.Zero)
{
// Select font.
hfont = GdiFont.Create(tboxInput.Font.Name,
(int)tboxInput.Font.Size, 0, hdcPrinter);
hfontOld = GdiGraphics.SelectObject(hdcPrinter, hfont);
// Print
PrintJob_Gdi.PrintText(tboxInput, hdcPrinter);
}
else
{
throw new System.Exception();
}
}
catch
{
MessageBox.Show("Error connecting to printer.",
"PrintHPMobile");
}
finally
{
// Cleanup
GdiGraphics.SelectObject(hdcPrinter, hfontOld);
GdiGraphics.DeleteObject(hfont);
mPrint.mPrintRenderWrapper.DeletePrinterContext(hdcPrinter);
}
}