/// <summary>
/// Returns a TEXTMETRIC structure for the font selected in the device context
/// represented by this object, in units of pixels.
/// </summary>
public Gdi32.TEXTMETRICW GetTextMetrics()
{
// Set the mapping mode to MM_TEXT so we deal with units of pixels.
Gdi32.MM mapMode = DeviceContext.MapMode;
bool setupDC = mapMode != Gdi32.MM.TEXT;
if (setupDC)
{
// Changing the MapMode will affect viewport and window extent and origin, we save the dc
// state so all those properties can be properly restored once done.
DeviceContext.SaveHdc();
}
try
{
if (setupDC)
{
mapMode = DeviceContext.SetMapMode(Gdi32.MM.TEXT);
}
var tm = new Gdi32.TEXTMETRICW();
Gdi32.GetTextMetricsW(DeviceContext, ref tm);
return(tm);
}
finally
{
if (setupDC)
{
DeviceContext.RestoreHdc();
}
}
}
internal static IEmfValidator TextOut(
string text,
Gdi32.MM mapMode = Gdi32.MM.TEXT,
Gdi32.BKMODE backgroundMode = Gdi32.BKMODE.TRANSPARENT,
string?fontFace = null,
TextOutValidator.Flags validate = default) => new TextOutValidator(
text,
textColor: Color.Empty,
mapMode,
backgroundMode,
fontFace,
validate);
public TextOutValidator(
string text,
Color textColor,
Rectangle?bounds,
Gdi32.MM mapMode = default,
Gdi32.BKMODE backgroundMode = default,
string?fontFace = null,
Flags validate = default)
{
_text = text;
_textColor = textColor;
_mapMode = mapMode;
_backgroundMode = backgroundMode;
_fontFace = fontFace;
_bounds = bounds.HasValue ? bounds.Value : default;
if (validate != default)
{
_validate = validate;
}
else
{
_validate = Flags.Text;
if (bounds.HasValue)
{
_validate |= Flags.Bounds;
}
if (!textColor.IsEmpty)
{
_validate |= Flags.TextColor;
}
if (mapMode != default)
{
_validate |= Flags.MapMode;
}
if (backgroundMode != default)
{
_validate |= Flags.BackgroundMode;
}
if (!string.IsNullOrEmpty(fontFace))
{
_validate |= Flags.FontFace;
}
}
}
