public static int GetTextBaseline(Control ctrl, ContentAlignment alignment)
{
if (ctrl == null)
{
throw new ArgumentNullException("ctrl");
}
Rectangle ctrlRect = ctrl.ClientRectangle;
int ascent = 0;
int height = 0;
using (Graphics grfx = ctrl.CreateGraphics())
{
IntPtr hDC = grfx.GetHdc();
IntPtr hFont = ctrl.Font.ToHfont();
try
{
IntPtr oldFont = Gdi32.SelectObject(hDC, hFont);
TEXTMETRIC textMetric = new TEXTMETRIC();
Gdi32.GetTextMetrics(hDC, textMetric);
ascent = textMetric.tmAscent + 1;
height = textMetric.tmHeight;
Gdi32.SelectObject(hDC, oldFont);
}
finally
{
Gdi32.DeleteObject(hFont);
grfx.ReleaseHdc(hDC);
}
}
if ((alignment & NuGenControlPaint.AnyTop) != 0)
{
return (ctrlRect.Top + ascent);
}
if ((alignment & NuGenControlPaint.AnyMiddle) != 0)
{
return (((ctrlRect.Top + (ctrlRect.Height / 2)) - (height / 2)) + ascent);
}
return ((ctrlRect.Bottom - height) + ascent);
}
public static extern Boolean GetTextMetrics(IntPtr hdc, TEXTMETRIC tm);
public static extern Boolean GetTextMetrics(IntPtr hdc, TEXTMETRIC tm);