public void DrawString(RectangleD layout, string text, Cairo.Color color, ObjectFont font, StringTrimming trimming, HorizontalAlignment hAlign = HorizontalAlignment.Left, bool wrap = false)
{
double x = Math.Ceiling(layout.X * drawingScaleX);
double y = Math.Ceiling(layout.Y * drawingScaleY);
double width = Math.Floor(layout.Width * drawingScaleX);
double height = Math.Floor(layout.Height * drawingScaleY);
SetupPangoLayout(text, font, trimming, wrap ? (float?)width : null);
cairoContext.Save();
cairoContext.Rectangle(x, y, width, height);
cairoContext.Clip();
cairoContext.Antialias = Antialias.None;
Pango.Rectangle ink, logical;
pangoLayout.GetPixelExtents(out ink, out logical);
if (ink.X < 0)
{
x -= ink.X;
logical.Width -= ink.X;
}
switch (hAlign)
{
case HorizontalAlignment.Left:
pangoLayout.Alignment = Alignment.Left;
break;
case HorizontalAlignment.Center:
pangoLayout.Alignment = Alignment.Center;
if (width > logical.Width)
{
x += (width - logical.Width) / 2;
}
break;
case HorizontalAlignment.Right:
pangoLayout.Alignment = Alignment.Right;
if (width > logical.Width)
{
x += width - logical.Width;
}
break;
}
cairoContext.MoveTo(x, y);
cairoContext.Color = color;
cairoContext.ShowLayout(pangoLayout);
cairoContext.Restore();
}
private void SetupPangoLayout(string text, ObjectFont font, StringTrimming trimming, double?width)
{
PangoStyle style = new PangoStyle
{
ExactSize = font.Size,
FontFamily = DataHelper.GetPreferredFont(text) ?? (font.NameSpecified ? font.Name : DataHelper.DefaultDocumentsFont)
};
if (font.Italic)
{
style.Italic = true;
}
if (font.Bold)
{
style.Bold = true;
}
if (font.Underline)
{
style.Underline = true;
}
if (font.StrikeThrought)
{
style.Strikethrough = true;
}
pangoLayout.SetMarkup(style.GetMarkup(text));
pangoLayout.Ellipsize = EllipsizeMode.None;
pangoLayout.Wrap = WrapMode.Word;
if (width != null)
{
pangoLayout.Width = (int)(width * Scale.PangoScale);
}
else
{
pangoLayout.Width = -1;
if (trimming != StringTrimming.None)
{
pangoLayout.Ellipsize = EllipsizeMode.End;
}
}
}
public SizeD MeasureString(string text, ObjectFont font, double?width)
{
bool emptyString = string.IsNullOrWhiteSpace(text);
if (emptyString)
{
text = "W";
}
SetupPangoLayout(text, font, StringTrimming.Character, width != null ? width * drawingScaleX : null);
Pango.Rectangle ink, logical;
pangoLayout.GetPixelExtents(out ink, out logical);
if (ink.X < 0)
{
logical.Width -= ink.X;
}
if (emptyString)
{
logical.Width = 0;
}
return(new SizeD(logical.Width / drawingScaleX, logical.Height / drawingScaleY));
}
/// <summary>
/// Gets the name of the specified font in the format used by <c>Pango</c>.
/// </summary>
/// <param name="font">The font.</param>
/// <returns>The name of the specified font in the format used by <c>Pango</c>.</returns>
public static string GetPangoName(ObjectFont font)
{
return(GetPangoName(font.Name, font.Bold, font.Italic, font.Size));
}
