namespace CairoChart { public class Text { public string text = ""; public Font.Style style = Font.Style (); public Color color = Color(); public virtual Cairo.TextExtents get_extents (Cairo.Context context) { context.select_font_face (style.family, style.slant, style.weight); context.set_font_size (style.size); Cairo.TextExtents extents; context.text_extents (text, out extents); return extents; } public virtual double get_width (Cairo.Context context) { var extents = get_extents (context); switch (style.orientation) { case Font.Orientation.HORIZONTAL: return extents.width; case Font.Orientation.VERTICAL: return extents.height; default: return 0.0; } } public virtual double get_height (Cairo.Context context) { var extents = get_extents (context); switch (style.orientation) { case Font.Orientation.HORIZONTAL: return extents.height; case Font.Orientation.VERTICAL: return extents.width; default: return 0.0; } } public struct Size { double width; double height; } public virtual Size get_size (Cairo.Context context) { var sz = Size(); var extents = get_extents (context); switch (style.orientation) { case Font.Orientation.HORIZONTAL: sz.width = extents.width + extents.x_bearing; sz.height = extents.height; break; case Font.Orientation.VERTICAL: sz.width = extents.height; // + extents.x_bearing ? sz.height = extents.width; // +- extents.y_bearing ? break; } return sz; } public virtual void show (Cairo.Context context) { context.select_font_face(style.family, style.slant, style.weight); context.set_font_size(style.size); if (style.orientation == Font.Orientation.VERTICAL) { context.rotate(- GLib.Math.PI / 2.0); context.show_text(text); context.rotate(GLib.Math.PI / 2.0); } else { context.show_text(text); } } public Text (string text = "", Font.Style style = Font.Style(), Color color = Color()) { this.text = text; this.style = style; this.color = color; } public virtual Text copy () { var text = new Text (); text.text = this.text; text.style = this.style; text.color = this.color; return text; } } }