/// <summary>
/// Get font text metrics points.
/// </summary>
/// <param name="g"></param>
/// <param name="hFont"></param>
/// <param name="fontName"></param>
/// <param name="fontSize"></param>
/// <param name="retPoint"></param>
public static void GetTextMetrics(Graphics g, IntPtr hFont, string fontName, int fontSize, out PointF retPoint)
{
retPoint = new PointF();
int dpiX = (int)g.DpiX;
// create the handle of DC
IntPtr hdc = g.GetHdc();
IntPtr hFontOld = (IntPtr)NativeWindowCommon.SelectObject(hdc, hFont);
NativeWindowCommon.TEXTMETRIC tm;
NativeWindowCommon.GetTextMetrics(hdc, out tm);
retPoint.X = tm.tmAveCharWidth;
retPoint.Y = tm.tmHeight;
if (SpecialTextSizeFactoring && dpiX == 120) //defect 117706
{
//please, create an infrastructure for this if you need to add another font ...
if (fontName == "Microsoft Sans Serif" && fontSize == 8 && retPoint.X == 6)
{
//For 100% resolution we got tm.tmAveCharWidth = 5 (average char width)
//For 125% resolution we got tm.tmAveCharWidth = 6 and in prepareUOMConversion we use this data as factor for calculating all magic sizes for all controls and form.
//So, the difference between 125% resolution and 100% resolution is 6/5 = 1.2, i.e 120% which is not enough
//Here we manually set factor
retPoint.X = 5 * 1.275F;
}
}
NativeWindowCommon.SelectObject(hdc, hFontOld);
// release the resources
g.ReleaseHdc(hdc);
}