101 lines
2.0 KiB
Vala
101 lines
2.0 KiB
Vala
namespace CairoChart {
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/**
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* {@link Series} Marker.
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*/
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public class Marker {
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Chart chart;
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/**
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* ``Marker`` shape.
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*/
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public enum Shape {
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NONE = 0,
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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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/**
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* ``Marker`` shape.
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*/
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public Shape type;
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/**
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* ``Marker`` size.
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*/
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public double size;
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/**
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* Constructs a new ``Marker``.
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* @param type ``Marker`` shape.
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* @param size ``Marker`` size.
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*/
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public Marker (Chart chart,
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Shape type = Shape.NONE,
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double size = 8.0
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) {
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this.chart = chart;
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this.type = type;
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this.size = size;
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}
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/**
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* Gets a copy of the ``Marker``.
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*/
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public virtual Marker copy () {
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return new Marker (chart, type, size);
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}
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/**
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* Draws the ``Marker`` at specific position.
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* @param x x-coordinate.
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* @param y y-coordinate.
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*/
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public virtual void draw_at_pos (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 Shape.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 Shape.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 Shape.TRIANGLE:
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chart.ctx.move_to (x - size / 2, y - size / 2);
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chart.ctx.rel_line_to (size, 0);
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chart.ctx.rel_line_to (-size / 2, size);
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chart.ctx.rel_line_to (-size / 2, -size);
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chart.ctx.fill();
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break;
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case Shape.PRICLE_SQUARE:
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chart.ctx.rectangle (x - size / 2, y - size / 2, size, size);
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chart.ctx.stroke();
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break;
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case Shape.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 Shape.PRICLE_TRIANGLE:
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chart.ctx.move_to (x - size / 2, y - size / 2);
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chart.ctx.rel_line_to (size, 0);
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chart.ctx.rel_line_to (-size / 2, size);
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chart.ctx.rel_line_to (-size / 2, -size);
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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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