public static extern int SetWorldTransform( IntPtr hdc, ref XFORM lpXform );
public static extern int GetWorldTransform(IntPtr hdc, ref XFORM lpXform);
public static void DrawString( Graphics g, string text, Font font, Color color, Rectangle rect, Alignment alignment, VAlignment valignment, TextSplitting textSplitting, Ampersands ampersands )
{
if( g == null )
{
throw new ArgumentNullException( "g" );
}
if( text == null )
{
throw new ArgumentNullException( "text" );
}
if( font == null )
{
throw new ArgumentNullException( "font" );
}
if( ampersands == Ampersands.Display )
{
text = text.Replace( "&", "&&" );
}
float[] txValues = g.Transform.Elements;
IntPtr hClipRgn = g.Clip.GetHrgn( g );
IntPtr hDC = g.GetHdc();
Gdi.SelectClipRgn( hDC, hClipRgn );
int oldGraphicsMode = Gdi.SetGraphicsMode( hDC, 2 );
XFORM oldXForm = new XFORM();
Gdi.GetWorldTransform( hDC, ref oldXForm );
XFORM newXForm = new XFORM();
newXForm.eM11 = txValues[0];
newXForm.eM12 = txValues[1];
newXForm.eM21 = txValues[2];
newXForm.eM22 = txValues[3];
newXForm.eDx = txValues[4];
newXForm.eDy = txValues[5];
Gdi.SetWorldTransform( hDC, ref newXForm );
try
{
IntPtr hFont = font.ToHfont();
IntPtr hOldFont = Gdi.SelectObject( hDC, hFont );
try
{
BinaryComponents.Utility.Win32.Common.RECT r = new BinaryComponents.Utility.Win32.Common.RECT( rect );
User.DrawTextFlags uFormat;
switch( textSplitting )
{
case TextSplitting.SingleLineEllipsis:
uFormat
= User.DrawTextFlags.DT_WORD_ELLIPSIS
| User.DrawTextFlags.DT_END_ELLIPSIS;
break;
case TextSplitting.MultiLine:
uFormat
= User.DrawTextFlags.DT_WORDBREAK;
break;
default:
throw new InvalidOperationException();
}
switch( alignment )
{
case Alignment.Left:
break;
case Alignment.Center:
uFormat
= User.DrawTextFlags.DT_CENTER;
break;
case Alignment.Right:
uFormat
= User.DrawTextFlags.DT_RIGHT;
break;
default:
throw new InvalidOperationException();
}
switch( valignment )
{
case VAlignment.Top:
break;
case VAlignment.Bottom:
uFormat |= User.DrawTextFlags.DT_BOTTOM | User.DrawTextFlags.DT_SINGLELINE;
break;
case VAlignment.Center:
uFormat |= User.DrawTextFlags.DT_VCENTER | User.DrawTextFlags.DT_SINGLELINE;
break;
}
uint bgr = (uint)((color.B << 16) | (color.G << 8) | (color.R));
uint oldColor = Gdi.SetTextColor( hDC, bgr );
try
{
BackgroundMode oldBackgroundMode = Gdi.SetBkMode( hDC, BackgroundMode.TRANSPARENT );
try
{
User.DrawText( hDC, text, text.Length, ref r, uFormat );
}
finally
{
Gdi.SetBkMode( hDC, oldBackgroundMode );
}
}
finally
{
Gdi.SetTextColor( hDC, oldColor );
}
}
finally
{
Gdi.SelectObject( hDC, hOldFont );
Gdi.DeleteObject( hFont );
}
}
finally
{
if( oldGraphicsMode == 1 )
{
oldXForm.eM11 = 1;
oldXForm.eM12 = 0;
oldXForm.eM21 = 0;
oldXForm.eM22 = 1;
oldXForm.eDx = 0;
oldXForm.eDx = 0;
}
Gdi.SetWorldTransform( hDC, ref oldXForm );
Gdi.SetGraphicsMode( hDC, oldGraphicsMode );
g.ReleaseHdc( hDC );
if( hClipRgn != IntPtr.Zero )
{
g.Clip.ReleaseHrgn( hClipRgn );
}
}
}
