OK In progress...

src/Axis.vala

@@ -72,9 +72,9 @@ namespace CairoChart {
 			}
 			default = 2;
 		}
-		public Font.Style font_style = Font.Style ();
+		public Font font_style = Font ();
 		public Color color = Color ();
-		public Line.Style line_style = Line.Style ();
+		public LineStyle line_style = LineStyle ();
 		public double font_spacing = 5;
 
 		public virtual Axis copy () {

src/Chart.vala

@@ -81,7 +81,7 @@ namespace CairoChart {
 		/**
 		 * Selection line style.
 		 */
-		public Line.Style selection_style = Line.Style ();
+		public LineStyle selection_style = LineStyle ();
 
 		/**
 		 * ``Chart`` cursors.
@@ -303,7 +303,7 @@ namespace CairoChart {
 		}
 		protected virtual void rot_axes_titles () {
 			foreach (var s in series)
-				s.axis_y.title.style.orientation = Font.Orientation.VERTICAL;
+				s.axis_y.title.style.direct = FontDirect.VERTICAL;
 		}
 
 		protected virtual void eval_plarea () {

src/Cursor.vala

@@ -32,12 +32,12 @@ namespace CairoChart {
 
 			public Orientation orientation;
 			public double select_distance;
-			public Line.Style line_style;
+			public LineStyle line_style;
 
 			public Style () {
 				orientation = Orientation.VERTICAL;
 				select_distance = 32;
-				line_style = Line.Style(Color(0.2, 0.2, 0.2, 0.8));
+				line_style = LineStyle(Color(0.2, 0.2, 0.2, 0.8));
 			}
 		}
 

src/Font.vala

@@ -1,30 +1,25 @@
 namespace CairoChart {
 
 	/**
-	 * Text font.
+	 * ``Font`` direction.
 	 */
-	public class Font {
+	public enum FontDirect {
 
 		/**
-		 * ``Font`` orientation.
+		 * Horizontal font/text direction.
-		 */
-		public enum Orientation {
-
-			/**
-			 * Horizontal font/text orientation.
 		 */
 		HORIZONTAL = 0,
 
 		/**
-			 * Vertical font/text orientation.
+		 * Vertical font/text direction.
 		 */
 		VERTICAL
 	}
 
 	/**
-		 * ``Font`` Style.
+	 * ``Font`` style.
 	 */
-		public struct Style {
+	public struct Font {
 
 		/**
 		 * A font family name, encoded in UTF-8.
@@ -47,32 +42,29 @@ namespace CairoChart {
 		Cairo.FontWeight weight;
 
 		/**
-			 * Font/Text orientation.
+		 * Font/Text direction.
 		 */
-			Orientation orientation;
+		FontDirect direct;
 
 		/**
-			 * Constructs a new ``Style``.
+		 * Constructs a new ``Font``.
 		 * @param family a font family name, encoded in UTF-8.
 		 * @param size the new font size, in user space units.
 		 * @param slant the slant for the font.
 		 * @param weight the weight for the font.
-			 * @param orientation font/text orientation.
+		 * @param direct font/text direction.
 		 */
-			public Style (string family = "Sans",
+		public Font (string family = "Sans",
 		              double size = 10,
 		              Cairo.FontSlant slant = Cairo.FontSlant.NORMAL,
 		              Cairo.FontWeight weight = Cairo.FontWeight.NORMAL,
-			              Font.Orientation orientation = Font.Orientation.HORIZONTAL
+		              FontDirect direct = FontDirect.HORIZONTAL
 		) {
 			this.family = family;
 			this.size = size;
 			this.slant = slant;
 			this.weight = weight;
-				this.orientation = orientation;
+			this.direct = direct;
 		}
 	}
-
-		private Font () { }
-	}
 }

src/Grid.vala

@@ -18,7 +18,7 @@ namespace CairoChart {
 		/**
 		 * Line style of the ``Grid``.
 		 */
-		public Line.Style line_style = Line.Style ();
+		public LineStyle line_style = LineStyle ();
 
 		/**
 		 * Gets a copy of the ``Grid``.

src/Label.vala

@@ -1,24 +1,19 @@
 namespace CairoChart {
 
 	/**
-	 * Value of the point.
+	 * ``LabelStyle`` Style.
 	 */
-	public class Label {
+	public struct LabelStyle {
-
-		/**
-		 * ``Label`` Style.
-		 */
-		public struct Style {
 
 		/**
 		 * Font style.
 		 */
-			Font.Style font_style;
+		Font font_style;
 
 		/**
 		 * Frame line style.
 		 */
-			Line.Style frame_line_style;
+		LineStyle frame_line_style;
 
 		/**
 		 * Background color.
@@ -30,7 +25,4 @@ namespace CairoChart {
 		 */
 		Color frame_color;
 	}
-
-		private Label () { }
-	}
 }

src/Legend.vala

@@ -10,9 +10,9 @@ namespace CairoChart {
 		}
 
 		public Position position = Position.TOP;
-		public Font.Style font_style = Font.Style();
+		public Font font_style = Font();
 		public Color bg_color = Color(1, 1, 1);
-		public Line.Style border_style = Line.Style ();
+		public LineStyle border_style = LineStyle ();
 		public double spacing = 5;
 		public double width = 0;
 		public double height = 0;

src/Line.vala

@@ -1,14 +1,9 @@
 namespace CairoChart {
 
-	/**
-	 * ``Chart`` line.
-	 */
-	public class Line {
-
 	/**
 	 * Line Style.
 	 */
-		public struct Style {
+	public struct LineStyle {
 
 		/**
 		 * Line color.
@@ -40,7 +35,7 @@ namespace CairoChart {
 		Cairo.LineCap cap;
 
 		/**
-			 * Constructs a new ``Style``.
+		 * Constructs a new ``LineStyle``.
 		 * @param color line color.
 		 * @param width a line width.
 		 * @param dashes an array specifying alternate lengths of on and off stroke portions.
@@ -48,7 +43,7 @@ namespace CairoChart {
 		 * @param join a line join style.
 		 * @param cap a line cap style.
 		 */
-			public Style (Color color = Color(),
+		public LineStyle (Color color = Color(),
 		                  double width = 1,
 		                  double[]? dashes = null,
 		                  double dash_offset = 0,
@@ -74,7 +69,4 @@ namespace CairoChart {
 			chart.ctx.set_line_cap(cap);
 		}
 	}
-
-		private Line () { }
-	}
 }

src/Series.vala

@@ -21,7 +21,7 @@ namespace CairoChart {
 
 		public Grid grid = new Grid ();
 
-		public Line.Style line_style = Line.Style ();
+		public LineStyle line_style = LineStyle ();
 
 		protected Color _color = Color (0.0, 0.0, 0.0, 1.0);
 		public Color color {

src/Text.vala

@@ -1,7 +1,7 @@
 namespace CairoChart {
 	public class Text {
 		public string text = "";
-		public Font.Style style = Font.Style ();
+		public Font style = Font ();
 		public Color color = Color();
 		public double vspacing = 4;
 		public double hspacing = 4;
@@ -25,18 +25,18 @@ namespace CairoChart {
 
 		public virtual double get_width (Cairo.Context ctx) {
 			var extents = get_extents (ctx);
-			switch (style.orientation) {
+			switch (style.direct) {
-			case Font.Orientation.HORIZONTAL: return extents.width;
+			case FontDirect.HORIZONTAL: return extents.width;
-			case Font.Orientation.VERTICAL: return extents.height;
+			case FontDirect.VERTICAL: return extents.height;
 			default: return 0.0;
 			}
 		}
 
 		public virtual double get_height (Cairo.Context ctx) {
 			var extents = get_extents (ctx);
-			switch (style.orientation) {
+			switch (style.direct) {
-			case Font.Orientation.HORIZONTAL: return extents.height;
+			case FontDirect.HORIZONTAL: return extents.height;
-			case Font.Orientation.VERTICAL: return extents.width;
+			case FontDirect.VERTICAL: return extents.width;
 			default: return 0.0;
 			}
 		}
@@ -49,12 +49,12 @@ namespace CairoChart {
 		public virtual Size get_size (Cairo.Context ctx) {
 			var sz = Size();
 			var extents = get_extents (ctx);
-			switch (style.orientation) {
+			switch (style.direct) {
-			case Font.Orientation.HORIZONTAL:
+			case FontDirect.HORIZONTAL:
 				sz.width = extents.width + extents.x_bearing;
 				sz.height = extents.height;
 				break;
-			case Font.Orientation.VERTICAL:
+			case FontDirect.VERTICAL:
 				sz.width = extents.height; // + extents.x_bearing ?
 				sz.height = extents.width; // +- extents.y_bearing ?
 				break;
@@ -67,7 +67,7 @@ namespace CairoChart {
 			                         style.slant,
 			                         style.weight);
 			ctx.set_font_size(style.size);
-			if (style.orientation == Font.Orientation.VERTICAL) {
+			if (style.direct == FontDirect.VERTICAL) {
 				ctx.rotate(- GLib.Math.PI / 2.0);
 				ctx.show_text(text);
 				ctx.rotate(GLib.Math.PI / 2.0);
@@ -77,7 +77,7 @@ namespace CairoChart {
 		}
 
 		public Text (string text = "",
-		             Font.Style style = Font.Style(),
+		             Font style = Font(),
 		             Color color = Color()
 		) {
 			this.text = text;

test/ChartTest.vala

@@ -249,7 +249,7 @@ int main (string[] args) {
 	plot_chart3 (chart3);
 	plot_chart4 (chart4);
 
-	chart1.selection_style = Line.Style(Color(0.3, 0.3, 0.3, 0.7));
+	chart1.selection_style = LineStyle(Color(0.3, 0.3, 0.3, 0.7));
 
 	var da = new DrawingArea();
 	da.set_events ( Gdk.EventMask.BUTTON_PRESS_MASK