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