public XSize MeasureString(XGraphics gfx, string text, XFont font, XStringFormat stringFormat)
{
TextBlock textBlock = FontHelper.CreateTextBlock(text, null, font.Size, null);
return(new XSize(textBlock.ActualWidth, textBlock.ActualHeight));
}
public void DrawString(XGraphics gfx, string text, XFont font, XBrush brush, XRect layoutRectangle, XStringFormat format)
{
double x = layoutRectangle.X;
double y = layoutRectangle.Y;
double lineSpace = font.GetHeight(gfx);
double cyAscent = lineSpace * font.cellAscent / font.cellSpace;
double cyDescent = lineSpace * font.cellDescent / font.cellSpace;
bool bold = (font.Style & XFontStyle.Bold) != 0;
bool italic = (font.Style & XFontStyle.Italic) != 0;
bool strikeout = (font.Style & XFontStyle.Strikeout) != 0;
bool underline = (font.Style & XFontStyle.Underline) != 0;
//FormattedText formattedText = new FormattedText(text, new CultureInfo("en-us"), // WPFHACK
// FlowDirection.LeftToRight, font.typeface, font.Size, brush.RealizeWpfBrush());
TextBlock textBlock = FontHelper.CreateTextBlock(text, null, font.Size, brush.RealizeWpfBrush());
Canvas.SetLeft(textBlock, x);
Canvas.SetTop(textBlock, y);
//formattedText.SetTextDecorations(TextDecorations.OverLine);
switch (format.Alignment)
{
case XStringAlignment.Near:
// nothing to do, this is the default
//formattedText.TextAlignment = TextAlignment.Left;
break;
case XStringAlignment.Center:
x += layoutRectangle.Width / 2;
textBlock.TextAlignment = TextAlignment.Center;
break;
case XStringAlignment.Far:
x += layoutRectangle.Width;
textBlock.TextAlignment = TextAlignment.Right;
break;
}
if (gfx.PageDirection == XPageDirection.Downwards)
{
switch (format.LineAlignment)
{
case XLineAlignment.Near:
//y += cyAscent;
break;
//case XLineAlignment.Center:
// // TODO use CapHeight. PDFlib also uses 3/4 of ascent
// y += -formattedText.Baseline + (cyAscent * 1 / 3) + layoutRectangle.Height / 2;
// //y += -formattedText.Baseline + (font.Size * font.Metrics.CapHeight / font.unitsPerEm / 2) + layoutRectangle.Height / 2;
// break;
//case XLineAlignment.Far:
// y += -formattedText.Baseline - cyDescent + layoutRectangle.Height;
// break;
//case XLineAlignment.BaseLine:
// y -= formattedText.Baseline;
// break;
}
}
else
{
// TODOWPF: make unit test
switch (format.LineAlignment)
{
case XLineAlignment.Near:
//y += cyDescent;
break;
case XLineAlignment.Center:
// TODO use CapHeight. PDFlib also uses 3/4 of ascent
//y += -(cyAscent * 3 / 4) / 2 + rect.Height / 2;
break;
case XLineAlignment.Far:
//y += -cyAscent + rect.Height;
break;
case XLineAlignment.BaseLine:
// nothing to do
break;
}
}
//if (bold && !descriptor.IsBoldFace)
//{
// // TODO: emulate bold by thicker outline
//}
//if (italic && !descriptor.IsBoldFace)
//{
// // TODO: emulate italic by shearing transformation
//}
//if (underline)
//{
// formattedText.FontStyle.SetTextDecorations(TextDecorations.Underline);
// //double underlinePosition = lineSpace * realizedFont.FontDescriptor.descriptor.UnderlinePosition / font.cellSpace;
// //double underlineThickness = lineSpace * realizedFont.FontDescriptor.descriptor.UnderlineThickness / font.cellSpace;
// //DrawRectangle(null, brush, x, y - underlinePosition, width, underlineThickness);
//}
//if (strikeout)
//{
// formattedText.SetTextDecorations(TextDecorations.Strikethrough);
// //double strikeoutPosition = lineSpace * realizedFont.FontDescriptor.descriptor.StrikeoutPosition / font.cellSpace;
// //double strikeoutSize = lineSpace * realizedFont.FontDescriptor.descriptor.StrikeoutSize / font.cellSpace;
// //DrawRectangle(null, brush, x, y - strikeoutPosition - strikeoutSize, width, strikeoutSize);
//}
//formattedText
_canvas.Children.Add(textBlock);
}