/// <summary>
/// The measure text.
/// </summary>
/// <param name="text">The text.</param>
/// <param name="fontFamily">The font family.</param>
/// <param name="fontSize">The font size.</param>
/// <param name="fontWeight">The font weight.</param>
/// <returns>The size of the text.</returns>
public override OxySize MeasureText(string text, string fontFamily, double fontSize, double fontWeight)
{
if (text == null)
{
return(OxySize.Empty);
}
this.g.Save();
#if GTKSHARP3
Pango.Layout layout = new Layout(this.c);
#else
Pango.Layout layout = Pango.CairoHelper.CreateLayout(this.g);
#endif
Pango.FontDescription font = new Pango.FontDescription();
font.Family = fontFamily;
font.Weight = (fontWeight >= 700) ? Pango.Weight.Bold : Pango.Weight.Normal;
font.AbsoluteSize = (int)(fontSize * Pango.Scale.PangoScale);
layout.FontDescription = font;
layout.SetText(text);
Pango.Rectangle inkRect;
Pango.Rectangle logicalRect;
layout.GetExtents(out inkRect, out logicalRect);
this.g.Restore();
layout.Dispose();
return(new OxySize(logicalRect.Width / Pango.Scale.PangoScale, logicalRect.Height / Pango.Scale.PangoScale));
}
/// <summary>
/// Draws the text.
/// </summary>
/// <param name="p">The p.</param>
/// <param name="text">The text.</param>
/// <param name="fill">The fill color.</param>
/// <param name="fontFamily">The font family.</param>
/// <param name="fontSize">Size of the font.</param>
/// <param name="fontWeight">The font weight.</param>
/// <param name="rotate">The rotation angle.</param>
/// <param name="halign">The horizontal alignment.</param>
/// <param name="valign">The vertical alignment.</param>
/// <param name="maxSize">The maximum size of the text.</param>
public override void DrawText(
ScreenPoint p,
string text,
OxyColor fill,
string fontFamily,
double fontSize,
double fontWeight,
double rotate,
HorizontalAlignment halign,
VerticalAlignment valign,
OxySize?maxSize)
{
Pango.Layout layout = Pango.CairoHelper.CreateLayout(this.g);
Pango.FontDescription font = new Pango.FontDescription();
font.Family = fontFamily;
font.Weight = (fontWeight >= 700) ? Pango.Weight.Bold : Pango.Weight.Normal;
font.AbsoluteSize = (int)(fontSize * Pango.Scale.PangoScale);
layout.FontDescription = font;
layout.SetText(text);
Pango.Rectangle inkRect;
Pango.Rectangle size;
layout.GetExtents(out inkRect, out size);
size.Width /= (int)Pango.Scale.PangoScale;
size.Height /= (int)Pango.Scale.PangoScale;
if (maxSize != null)
{
int maxWidth = (int)Math.Min((Double)Int32.MaxValue, maxSize.Value.Width);
int maxHeight = (int)Math.Min((Double)Int32.MaxValue, maxSize.Value.Height);
size.Width = Math.Min(size.Width, maxWidth);
size.Height = Math.Min(size.Height, maxHeight);
}
this.g.Save();
double dx = 0;
if (halign == HorizontalAlignment.Center)
{
dx = -size.Width / 2;
}
if (halign == HorizontalAlignment.Right)
{
dx = -size.Width;
}
double dy = 0;
if (valign == VerticalAlignment.Middle)
{
dy = -size.Height / 2;
}
if (valign == VerticalAlignment.Bottom)
{
dy = -size.Height;
}
this.g.Translate(p.X, p.Y);
if (Math.Abs(rotate) > double.Epsilon)
{
this.g.Rotate(rotate * Math.PI / 180.0);
}
this.g.Translate(dx, dy);
g.Rectangle(0, 0, size.Width + 0.1f, size.Height + 0.1f);
g.Clip();
this.g.SetSourceColor(fill);
Pango.CairoHelper.ShowLayout(this.g, layout);
this.g.Restore();
}
private void DrawStringTBLR(PageText pt, Cairo.Context g, Cairo.Rectangle r)
{
StyleInfo si = pt.SI;
string s = pt.Text;
g.Save();
layout = CairoHelper.CreateLayout(g);
//Pango fonts are scaled to 72dpi, Windows fonts uses 96dpi
float fontsize = (si.FontSize * 72 / 96);
var font = FontDescription.FromString($"{si.GetFontFamily().Name} {fontsize * PixelsX(1)}");
if (si.FontStyle == FontStyleEnum.Italic)
{
font.Style = Style.Italic;
}
switch (si.FontWeight)
{
case FontWeightEnum.Bold:
case FontWeightEnum.Bolder:
case FontWeightEnum.W500:
case FontWeightEnum.W600:
case FontWeightEnum.W700:
case FontWeightEnum.W800:
case FontWeightEnum.W900:
font.Weight = Weight.Bold;
break;
}
FontDescription oldfont = layout.FontDescription;
layout.FontDescription = font;
switch (si.TextAlign)
{
case TextAlignEnum.Right:
layout.Alignment = Alignment.Right;
break;
case TextAlignEnum.Center:
layout.Alignment = Alignment.Center;
break;
case TextAlignEnum.Left:
default:
layout.Alignment = Alignment.Left;
break;
}
layout.Width = Units.FromPixels((int)(r.Height - si.PaddingTop - si.PaddingBottom - 2));
layout.Wrap = WrapMode.WordChar;
layout.SetText(s);
Rectangle logical;
Rectangle ink;
layout.GetExtents(out ink, out logical);
double height = logical.Height / Scale.PangoScale;
double y = 0;
double x = 0;
switch (si.VerticalAlign)
{
case VerticalAlignEnum.Top:
x = r.X + si.PaddingLeft;
break;
case VerticalAlignEnum.Middle:
x = r.X + (r.Width - height) / 2;
break;
case VerticalAlignEnum.Bottom:
x = r.X + (r.Width - height) + si.PaddingLeft;
break;
}
// draw the background
DrawBackground(g, r, si);
Cairo.Rectangle box = new Cairo.Rectangle(
x,
r.Y + r.Height - si.PaddingBottom - 1,
r.Height - si.PaddingBottom - si.PaddingTop,
r.Width - si.PaddingLeft + si.PaddingRight);
g.Color = si.Color.ToCairoColor();
g.Rotate(270 * Math.PI / 180.0);
CairoHelper.UpdateLayout(g, layout);
g.MoveTo(-box.Y, box.X);
CairoHelper.ShowLayout(g, layout);
layout.FontDescription = oldfont;
g.Restore();
}
private void DrawStringHorizontal(PageText pt, Cairo.Context g, Cairo.Rectangle r)
{
StyleInfo si = pt.SI;
string s = pt.Text;
g.Save();
layout = CairoHelper.CreateLayout(g);
float fontsize = si.FontSize * 72f / 96f;
var font = FontDescription.FromString(string.Format("{0} {1}", si.GetFontFamily().Name,
fontsize * PixelsX(1)));
if (si.FontStyle == FontStyleEnum.Italic)
{
font.Style = Style.Italic;
}
switch (si.FontWeight)
{
case FontWeightEnum.Bold:
case FontWeightEnum.Bolder:
case FontWeightEnum.W500:
case FontWeightEnum.W600:
case FontWeightEnum.W700:
case FontWeightEnum.W800:
case FontWeightEnum.W900:
font.Weight = Weight.Bold;
break;
}
FontDescription oldfont = layout.FontDescription;
layout.FontDescription = font;
switch (si.TextAlign)
{
case TextAlignEnum.Right:
layout.Alignment = Alignment.Right;
break;
case TextAlignEnum.Center:
layout.Alignment = Alignment.Center;
break;
case TextAlignEnum.Left:
default:
layout.Alignment = Alignment.Left;
break;
}
layout.Width = Units.FromPixels((int)(r.Width - si.PaddingLeft - si.PaddingRight - 2));
layout.Wrap = WrapMode.WordChar;
layout.SetText(s);
Rectangle logical;
Rectangle ink;
layout.GetExtents(out ink, out logical);
double height = logical.Height / Scale.PangoScale;
double y = 0;
switch (si.VerticalAlign)
{
case VerticalAlignEnum.Top:
y = r.Y + si.PaddingTop;
break;
case VerticalAlignEnum.Middle:
y = r.Y + (r.Height - height) / 2;
break;
case VerticalAlignEnum.Bottom:
y = r.Y + (r.Height - height) - si.PaddingBottom;
break;
}
// draw the background
DrawBackground(g, r, si);
Cairo.Rectangle box = new Cairo.Rectangle(
r.X + si.PaddingLeft + 1,
y,
r.Width,
r.Height);
g.Color = si.Color.ToCairoColor();
g.MoveTo(box.X, box.Y);
CairoHelper.ShowLayout(g, layout);
layout.FontDescription = oldfont;
g.Restore();
}
