/// <summary>
/// Measure the width and height of string <paramref name="str"/> when drawn on device context HDC
/// using the given font <paramref name="font"/>.<br/>
/// Restrict the width of the string and get the number of characters able to fit in the restriction and
/// the width those characters take.
/// </summary>
/// <param name="str">the string to measure</param>
/// <param name="font">the font to measure string with</param>
/// <param name="maxWidth">the max width to render the string in</param>
/// <param name="charFit">the number of characters that will fit under <see cref="maxWidth"/> restriction</param>
/// <param name="charFitWidth"></param>
/// <returns>the size of the string</returns>
public Size MeasureString(string str, Font font, float maxWidth, out int charFit, out int charFitWidth)
{
if (_useGdiPlusTextRendering)
{
ReleaseHdc();
throw new NotSupportedException("Char fit string measuring is not supported for GDI+ text rendering");
}
else
{
SetFont(font);
var size = new Size();
Win32Utils.GetTextExtentExPoint(_hdc, str, str.Length, (int)Math.Round(maxWidth), _charFit, _charFitWidth, ref size);
charFit = _charFit[0];
charFitWidth = charFit > 0 ? _charFitWidth[charFit - 1] : 0;
return(size);
}
}
/// <summary>
/// Measure the width and height of string <paramref name="str"/> when drawn on device context HDC
/// using the given font <paramref name="font"/>.<br/>
/// Restrict the width of the string and get the number of characters able to fit in the restriction and
/// the width those characters take.
/// </summary>
/// <param name="str">the string to measure</param>
/// <param name="font">the font to measure string with</param>
/// <param name="maxWidth">the max width to render the string in</param>
/// <param name="charFit">the number of characters that will fit under <see cref="maxWidth"/> restriction</param>
/// <param name="charFitWidth">the width that only the fitted characters take</param>
/// <returns>the size of the string</returns>
public Size MeasureString(string str, Font font, float maxWidth, out int charFit, out int charFitWidth)
{
charFit = 0;
charFitWidth = 0;
if (_useGdiPlusTextRendering)
{
ReleaseHdc();
var size = MeasureString(str, font);
for (int i = 1; i <= str.Length; i++)
{
charFit = i - 1;
Size pSize = MeasureString(str.Substring(0, i), font);
if (pSize.Height <= size.Height && pSize.Width < maxWidth)
{
charFitWidth = pSize.Width;
}
else
{
break;
}
}
return(size);
}
else
{
SetFont(font);
var size = new Size();
Win32Utils.GetTextExtentExPoint(_hdc, str, str.Length, (int)Math.Round(maxWidth), _charFit, _charFitWidth, ref size);
charFit = _charFit[0];
charFitWidth = charFit > 0 ? _charFitWidth[charFit - 1] : 0;
return(size);
}
}
public override void MeasureString(string str, RFont font, double maxWidth, out int charFit, out double charFitWidth)
{
charFit = 0;
charFitWidth = 0;
if (_useGdiPlusTextRendering)
{
ReleaseHdc();
var size = MeasureString(str, font);
for (int i = 1; i <= str.Length; i++)
{
charFit = i - 1;
RSize pSize = MeasureString(str.Substring(0, i), font);
if (pSize.Height <= size.Height && pSize.Width < maxWidth)
{
charFitWidth = pSize.Width;
}
else
{
break;
}
}
}
else
{
#if !MONO
SetFont(font);
var size = new Size();
Win32Utils.GetTextExtentExPoint(_hdc, str, str.Length, (int)Math.Round(maxWidth), _charFit, _charFitWidth, ref size);
charFit = _charFit[0];
charFitWidth = charFit > 0 ? _charFitWidth[charFit - 1] : 0;
#endif
}
}