140 lines
3.7 KiB
Vala
140 lines
3.7 KiB
Vala
namespace CairoChart {
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// If one of axis:title or axis:range.min/range.max are different
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// then draw separate axis for each/all series
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// or specify series name near the axis
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public class Axis {
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public Range range = new Range();
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Chart chart;
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public Text title;
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public enum Type {
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NUMBERS = 0,
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DATE_TIME
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}
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public enum ScaleType {
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LINEAR = 0, // default
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// LOGARITHMIC, // TODO
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// etc
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}
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public Type type;
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public ScaleType scale_type;
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public enum Position {
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LOW = 0,
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HIGH = 1,
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BOTH = 2
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}
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public Position position = Position.LOW;
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string _format = "%.2Lf";
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string _date_format = "%Y.%m.%d";
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string _time_format = "%H:%M:%S";
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int _dsec_signs = 2; // 2 signs = centiseconds
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public string format {
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get { return _format; }
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set {
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// TODO: check format
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_format = value;
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}
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default = "%.2Lf";
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}
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public string date_format {
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get { return _date_format; }
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set {
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// TODO: check format
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_date_format = value;
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}
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default = "%Y.%m.%d";
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}
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public string time_format {
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get { return _time_format; }
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set {
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// TODO: check format
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_time_format = value;
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}
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default = "%H:%M:%S";
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}
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public int dsec_signs {
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get { return _dsec_signs; }
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set {
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// TODO: check format
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_dsec_signs = value;
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}
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default = 2;
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}
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public Font font_style = new Font ();
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public Color color = Color ();
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public LineStyle line_style = LineStyle ();
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public double font_spacing = 5;
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public virtual Axis copy () {
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var axis = new Axis (chart);
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axis._date_format = this._date_format;
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axis._dsec_signs = this._dsec_signs;
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axis._format = this._format;
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axis._time_format = this._time_format;
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axis.color = this.color;
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axis.font_spacing = this.font_spacing;
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axis.font_style = this.font_style;
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axis.line_style = this.line_style;
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axis.range.max = this.range.max;
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axis.range.min = this.range.min;
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axis.position = this.position;
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axis.scale_type = this.scale_type;
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axis.title = this.title.copy();
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axis.type = this.type;
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axis.nrecords = this.nrecords;
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return axis;
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}
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public Axis (Chart chart) {
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this.chart = chart;
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title = new Text (chart, "");
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}
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public int nrecords = 128;
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public virtual void format_date_time (Float128 x, out string date, out string time) {
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date = time = "";
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var dt = new DateTime.from_unix_utc((int64)x);
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date = dt.format(date_format);
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var dsec_str =
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("%."+(dsec_signs.to_string())+"Lf").printf((LongDouble)(x - (int64)x)).offset(1);
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time = dt.format(time_format) + dsec_str;
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}
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public virtual void calc_rec_sizes (out double max_rec_width, out double max_rec_height, bool horizontal = true) {
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max_rec_width = max_rec_height = 0;
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for (var i = 0; i < nrecords; ++i) {
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Float128 x = (int64)(range.zmin + range.zrange / nrecords * i) + 1.0/3.0;
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switch (type) {
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case Axis.Type.NUMBERS:
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var text = new Text (chart, format.printf((LongDouble)x) + (horizontal ? "_" : ""), font_style);
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max_rec_width = double.max (max_rec_width, text.width);
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max_rec_height = double.max (max_rec_height, text.height);
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break;
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case Axis.Type.DATE_TIME:
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string date, time;
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format_date_time(x, out date, out time);
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var h = 0.0;
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if (date_format != "") {
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var text = new Text (chart, date + (horizontal ? "_" : ""), font_style);
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max_rec_width = double.max (max_rec_width, text.width);
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h = text.height;
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}
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if (time_format != "") {
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var text = new Text (chart, time + (horizontal ? "_" : ""), font_style);
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max_rec_width = double.max (max_rec_width, text.width);
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h += text.height;
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}
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max_rec_height = double.max (max_rec_height, h);
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break;
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}
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}
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}
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public virtual void unzoom () {
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range.unzoom();
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}
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}
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}
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