public CanvasSizeF MeasureText(string text, IFont font)
{
text = text.RemoveReturns();
SKRect bounds = new SKRect();
var size = new CanvasSizeF();
if (text.IsMultiline())
{
var fontHeight = font.Size.FontSizePointsToPixels();
foreach (var line in text.GetLines())
{
GetSKPaint(font).MeasureText(line, ref bounds);
size.Width = Math.Max(size.Width, bounds.Width);
size.Height += fontHeight;
}
}
else
{
GetSKPaint(font).MeasureText(text, ref bounds);
size.Width = bounds.Width;
size.Height = bounds.Height;
}
return(size);
}
private AnnotationPolygon AnnotationPolygon(IDisplay display, CanvasSizeF size, float x, float y, TextSymbolAlignment alignment)
{
float x1 = 0, y1 = 0;
switch (alignment)
{
case TextSymbolAlignment.rightAlignOver:
x1 = x - size.Width;
y1 = y - size.Height;
break;
case TextSymbolAlignment.rightAlignCenter:
x1 = x - size.Width;
y1 = y - size.Height / 2;
break;
case TextSymbolAlignment.rightAlignUnder:
x1 = x - size.Width;
y1 = y;
break;
case TextSymbolAlignment.Over:
x1 = x - size.Width / 2;
y1 = y - size.Height;
break;
case TextSymbolAlignment.Center:
x1 = x - size.Width / 2;
y1 = y - size.Height / 2;
break;
case TextSymbolAlignment.Under:
x1 = x - size.Width / 2;
y1 = y;
break;
case TextSymbolAlignment.leftAlignOver:
x1 = x;
y1 = y - size.Height;
break;
case TextSymbolAlignment.leftAlignCenter:
x1 = x;
y1 = y - size.Height / 2;
break;
case TextSymbolAlignment.leftAlignUnder:
x1 = x;
y1 = y;
break;
}
return(new AnnotationPolygon(x1, y1, size.Width, size.Height));
}
private CanvasSizeF MeasureStringSize(IDisplay display, string text)
{
if (text == _text && _measureStringSize.HasValue)
{
return(_measureStringSize.Value);
}
else
{
CanvasSizeF size = display.Canvas.MeasureText(text, _font);
if (text == _text)
{
_measureStringSize = size;
}
return(size);
}
}
