72 lines
1.6 KiB
Vala
72 lines
1.6 KiB
Vala
namespace CairoChart {
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public class Marker {
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public enum Type {
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NONE = 0, // default
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SQUARE,
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CIRCLE,
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TRIANGLE,
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PRICLE_SQUARE,
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PRICLE_CIRCLE,
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PRICLE_TRIANGLE
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}
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public Type type = Type.NONE;
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public double size = 8.0;
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public Marker (Type type = Type.NONE, double size = 8.0) {
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this.type = type;
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this.size = size;
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}
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public virtual Marker copy () {
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return new Marker (type, size);
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}
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public virtual void draw_at_pos (Chart chart, double x, double y) {
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chart.ctx.move_to (x, y);
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switch (type) {
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case Type.SQUARE:
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chart.ctx.rectangle (x - size / 2, y - size / 2, size, size);
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chart.ctx.fill();
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break;
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case Type.CIRCLE:
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chart.ctx.arc (x, y, size / 2, 0, 2 * GLib.Math.PI);
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chart.ctx.fill();
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break;
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case Type.TRIANGLE:
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chart.ctx.move_to (x - size / 2, y - size / 2);
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chart.ctx.line_to (x + size / 2, y - size / 2);
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chart.ctx.line_to (x, y + size / 2);
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chart.ctx.line_to (x - size / 2, y - size / 2);
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chart.ctx.fill();
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break;
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case Type.PRICLE_SQUARE:
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chart.ctx.rectangle (x - size / 2, y - size / 2,
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size, size);
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chart.ctx.stroke();
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break;
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case Type.PRICLE_CIRCLE:
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chart.ctx.arc (x, y, size / 2, 0, 2 * GLib.Math.PI);
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chart.ctx.stroke();
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break;
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case Type.PRICLE_TRIANGLE:
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chart.ctx.move_to (x - size / 2, y - size / 2);
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chart.ctx.line_to (x + size / 2, y - size / 2);
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chart.ctx.line_to (x, y + size / 2);
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chart.ctx.line_to (x - size / 2, y - size / 2);
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chart.ctx.stroke();
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break;
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}
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}
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}
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}
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