public void DrawText(string text, Point point, Font font, Color foreColor)
{
IntPtr fontHandle = font.ToHfont();
IntPtr oldFontHandle = NativeMethods.SelectObject(this.graphicsHandle, fontHandle);
int oldBkMode = NativeMethods.SetBkMode(this.graphicsHandle, NativeMethods.TRANSPARENT);
int oldTextColor = NativeMethods.SetTextColor(this.graphicsHandle, Color.FromArgb(0, foreColor.R, foreColor.G, foreColor.B).ToArgb());
Size size = this.MeassureTextInternal(text);
NativeMethods.RECT clip = new NativeMethods.RECT();
clip.left = point.X;
clip.top = point.Y;
clip.right = clip.left + size.Width;
clip.bottom = clip.top + size.Height;
// ExtTextOut does not show Mnemonics highlighting.
NativeMethods.DrawText(this.graphicsHandle, text, text.Length, ref clip, NativeMethods.DT_SINGLELINE | NativeMethods.DT_LEFT);
NativeMethods.SetTextColor(this.graphicsHandle, oldTextColor);
NativeMethods.SetBkMode(this.graphicsHandle, oldBkMode);
NativeMethods.SelectObject(this.graphicsHandle, oldFontHandle);
NativeMethods.DeleteObject(fontHandle);
}
private Size MeassureTextInternal(string text)
{
NativeMethods.RECT rect = new NativeMethods.RECT();
rect.left = 0;
rect.right = 0;
rect.top = 0;
rect.bottom = 0;
// ExtTextOut does not show Mnemonics highlighting.
NativeMethods.DrawText(this.graphicsHandle, text, text.Length, ref rect, NativeMethods.DT_SINGLELINE | NativeMethods.DT_LEFT | NativeMethods.DT_CALCRECT);
return(new Size(rect.right, rect.bottom));
}