682 lines
23 KiB
Vala
682 lines
23 KiB
Vala
using Cairo;
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namespace CairoChart {
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/**
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* ``Chart`` series.
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*/
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public class Series {
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protected Chart chart { get; protected set; default = null; }
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/**
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* 128-bit (X;Y) points.
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*/
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public Point128[] points = {};
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/**
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* Sort style.
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*/
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public enum Sort {
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/**
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* Sort by X.
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*/
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BY_X = 0,
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/**
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* Sort by Y.
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*/
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BY_Y = 1,
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/**
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* Do not sort points on draw().
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*/
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UNSORTED
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}
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/**
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* Sort style.
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*/
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public Sort sort = Sort.BY_X;
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/**
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* X-axis.
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*/
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public Axis axis_x;
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/**
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* Y-axis.
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*/
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public Axis axis_y;
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/**
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* ``Place`` of the ``Series`` on the {@link Chart}.
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*/
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public Place place = new Place();
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/**
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* Title of the ``Chart``.
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*/
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public Text title;
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/**
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* ``Marker`` style.
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*/
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public Marker marker;
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/**
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* Grid style.
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*/
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public Grid grid = new Grid ();
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/**
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* ``Series`` line style.
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*/
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public LineStyle line_style = LineStyle ();
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/**
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* ``Series`` color (set only).
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*/
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public Color color {
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protected get { return Color(); }
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set {
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line_style.color = value;
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axis_x.color = value;
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axis_y.color = value;
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grid.style.color = value;
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grid.style.color.alpha = 0.5;
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}
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default = Color (0, 0, 0, 1);
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}
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/**
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* Show the ``Series`` in zoomed area or not.
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*/
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public bool zoom_show = true;
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/**
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* Constructs a new ``Series``.
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* @param chart ``Chart`` instance.
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*/
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public Series (Chart chart) {
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this.chart = chart;
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title = new Text(chart);
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axis_x = new Axis(chart);
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axis_y = new Axis(chart);
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this.marker = new Marker(chart);
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}
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/**
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* Gets a copy of the ``Series``.
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*/
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public virtual Series copy () {
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var series = new Series (chart);
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series.axis_x = this.axis_x.copy ();
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series.axis_y = this.axis_y.copy ();
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series.grid = this.grid.copy ();
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series.line_style = this.line_style;
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series.marker = this.marker;
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series.place = this.place.copy();
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series.points = this.points;
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series.sort = this.sort;
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series.title = this.title.copy();
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series.zoom_show = this.zoom_show;
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return series;
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}
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/**
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* Draws the ``Series``.
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*/
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public virtual void draw () {
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var points = Math.sort_points(this, sort);
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line_style.apply(chart);
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// draw series line
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for (int i = 1; i < points.length; ++i) {
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Point c, d;
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if (Math.cut_line (
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Point(chart.plarea.x0, chart.plarea.y0),
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Point(chart.plarea.x1, chart.plarea.y1),
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Point(get_scr_x(points[i - 1].x), get_scr_y(points[i - 1].y)),
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Point(get_scr_x(points[i].x), get_scr_y(points[i].y)),
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out c, out d)
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) {
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chart.ctx.move_to (c.x, c.y);
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chart.ctx.line_to (d.x, d.y);
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}
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}
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chart.ctx.stroke();
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for (int i = 0; i < points.length; ++i) {
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var x = get_scr_x(points[i].x);
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var y = get_scr_y(points[i].y);
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if (Math.point_in_rect (Point(x, y), chart.plarea.x0, chart.plarea.x1,
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chart.plarea.y0, chart.plarea.y1))
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marker.draw_at_pos(Point(x, y));
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}
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}
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/**
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* Joins equal axes.
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* @param is_x is this X-axis or not.
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* @param nskip returns number of series to skip printing.
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*/
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public virtual void join_axes (bool is_x, ref int nskip) {
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Axis axis = axis_x;
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if (!is_x) axis = axis_y;
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if (!zoom_show) return;
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if (nskip != 0) {--nskip; return;}
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var max_rec_width = 0.0, max_rec_height = 0.0;
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calc_rec_sizes (axis, out max_rec_width, out max_rec_height, is_x);
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var max_font_spacing = is_x ? axis.font.vspacing : axis.font.hspacing;
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var max_axis_font_width = axis.title.text == "" ? 0 : axis.title.width + axis.font.hspacing;
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var max_axis_font_height = axis.title.text == "" ? 0 : axis.title.height + axis.font.vspacing;
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var si = Math.find_arr<Series>(chart.series, this);
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if (si == -1) return;
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if (is_x)
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join_relative_x_axes (si, true, ref max_rec_width, ref max_rec_height, ref max_font_spacing, ref max_axis_font_height, ref nskip);
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else
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join_relative_y_axes (si, true, ref max_rec_width, ref max_rec_height, ref max_font_spacing, ref max_axis_font_width, ref nskip);
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// for 4.2. Cursor values for joint X axis
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if (si == chart.zoom_1st_idx && chart.cursors.has_crossings) {
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switch (chart.cursors.style.orientation) {
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case Cursors.Orientation.VERTICAL:
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if (is_x && chart.joint_x) {
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var tmp = max_rec_height + axis.font.vspacing;
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switch (axis.position) {
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case Axis.Position.LOW: chart.plarea.y1 -= tmp; break;
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case Axis.Position.HIGH: chart.plarea.y0 += tmp; break;
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}
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}
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break;
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case Cursors.Orientation.HORIZONTAL:
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if (!is_x && chart.joint_y) {
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var tmp = max_rec_width + axis_y.font.hspacing;
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switch (axis_y.position) {
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case Axis.Position.LOW: chart.plarea.x0 += tmp; break;
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case Axis.Position.HIGH: chart.plarea.x1 -= tmp; break;
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}
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}
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break;
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}
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}
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if (is_x && (!chart.joint_x || si == chart.zoom_1st_idx)) {
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var tmp = max_rec_height + max_font_spacing + max_axis_font_height;
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switch (axis.position) {
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case Axis.Position.LOW: chart.plarea.y1 -= tmp; break;
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case Axis.Position.HIGH: chart.plarea.y0 += tmp; break;
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}
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}
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if (!is_x && (!chart.joint_y || si == chart.zoom_1st_idx)) {
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var tmp = max_rec_width + max_font_spacing + max_axis_font_width;
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switch (axis_y.position) {
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case Axis.Position.LOW: chart.plarea.x0 += tmp; break;
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case Axis.Position.HIGH: chart.plarea.x1 -= tmp; break;
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}
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}
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}
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/**
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* Draws horizontal axis.
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* @param nskip number of series to skip printing.
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*/
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public virtual void draw_horizontal_axis (ref int nskip) {
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if (!zoom_show) return;
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var si = Math.find_arr<Series>(chart.series, this);
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if (si == -1) return;
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if (chart.joint_x && si != chart.zoom_1st_idx) return;
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// 1. Detect max record width/height by axis.nrecords equally selected points using format.
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double max_rec_width, max_rec_height;
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calc_rec_sizes (axis_x, out max_rec_width, out max_rec_height, true);
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// 2. Calculate maximal available number of records, take into account the space width.
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long max_nrecs = (long) (chart.plarea.width * place.zwidth / max_rec_width);
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// 3. Calculate grid step.
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Float128 step = Math.calc_round_step (axis_x.range.zrange / max_nrecs, axis_x.dtype == Axis.DType.DATE_TIME);
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if (step > axis_x.range.zrange)
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step = axis_x.range.zrange;
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// 4. Calculate x_min (axis_x.range.zmin / step, round, multiply on step, add step if < axis_x.range.zmin).
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Float128 x_min = 0;
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if (step >= 1) {
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int64 x_min_nsteps = (int64) (axis_x.range.zmin / step);
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x_min = x_min_nsteps * step;
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} else {
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int64 round_axis_x_min = (int64)axis_x.range.zmin;
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int64 x_min_nsteps = (int64) ((axis_x.range.zmin - round_axis_x_min) / step);
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x_min = round_axis_x_min + x_min_nsteps * step;
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}
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if (x_min < axis_x.range.zmin) x_min += step;
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// 4.2. Cursor values for joint X axis
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if (chart.joint_x && chart.cursors.style.orientation == Cursors.Orientation.VERTICAL && chart.cursors.has_crossings) {
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var tmp = max_rec_height + axis_x.font.vspacing;
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switch (axis_x.position) {
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case Axis.Position.LOW: chart.evarea.y1 -= tmp; break;
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case Axis.Position.HIGH: chart.evarea.y0 += tmp; break;
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}
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}
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// 4.5. Draw Axis title
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if (axis_x.title.text != "") {
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var scr_x = chart.plarea.x0 + chart.plarea.width * (place.zx0 + place.zx1) / 2;
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var scr_y = 0.0;
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switch (axis_x.position) {
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case Axis.Position.LOW: scr_y = chart.evarea.y1 - axis_x.font.vspacing; break;
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case Axis.Position.HIGH: scr_y = chart.evarea.y0 + axis_x.font.vspacing + axis_x.title.height; break;
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}
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chart.ctx.move_to(scr_x - axis_x.title.width / 2, scr_y);
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chart.color = axis_x.color;
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if (chart.joint_x) chart.color = chart.joint_color;
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axis_x.title.show();
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}
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draw_horizontal_records (step, max_rec_height, x_min);
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chart.ctx.stroke ();
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var tmp1 = 0.0, tmp2 = 0.0, tmp3 = 0.0, tmp4 = 0.0;
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join_relative_x_axes (si, false, ref tmp1, ref tmp2, ref tmp3, ref tmp4, ref nskip);
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if (nskip != 0) {--nskip; return;}
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var tmp = max_rec_height + axis_x.font.vspacing + (axis_x.title.text == "" ? 0 : axis_x.title.height + axis_x.font.vspacing);
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switch (axis_x.position) {
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case Axis.Position.LOW: chart.evarea.y1 -= tmp; break;
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case Axis.Position.HIGH: chart.evarea.y0 += tmp; break;
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}
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}
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/**
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* Draws vertical axis.
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* @param nskip number of series to skip printing.
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*/
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public virtual void draw_vertical_axis (ref int nskip) {
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if (!zoom_show) return;
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var si = Math.find_arr<Series>(chart.series, this);
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if (si == -1) return;
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if (chart.joint_y && si != chart.zoom_1st_idx) return;
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// 1. Detect max record width/height by axis.nrecords equally selected points using format.
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double max_rec_width, max_rec_height;
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calc_rec_sizes (axis_y, out max_rec_width, out max_rec_height, false);
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// 2. Calculate maximal available number of records, take into account the space width.
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long max_nrecs = (long) (chart.plarea.height * place.zheight / max_rec_height);
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// 3. Calculate grid step.
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Float128 step = Math.calc_round_step (axis_y.range.zrange / max_nrecs);
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if (step > axis_y.range.zrange)
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step = axis_y.range.zrange;
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// 4. Calculate y_min (axis_y.range.zmin / step, round, multiply on step, add step if < axis_y.range.zmin).
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Float128 y_min = 0;
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if (step >= 1) {
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int64 y_min_nsteps = (int64) (axis_y.range.zmin / step);
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y_min = y_min_nsteps * step;
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} else {
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int64 round_axis_y_min = (int64)axis_y.range.zmin;
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int64 y_min_nsteps = (int64) ((axis_y.range.zmin - round_axis_y_min) / step);
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y_min = round_axis_y_min + y_min_nsteps * step;
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}
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if (y_min < axis_y.range.zmin) y_min += step;
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// 4.2. Cursor values for joint Y axis
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if (chart.joint_y && chart.cursors.style.orientation == Cursors.Orientation.HORIZONTAL && chart.cursors.has_crossings) {
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var tmp = max_rec_width + axis_y.font.hspacing;
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switch (axis_y.position) {
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case Axis.Position.LOW: chart.evarea.x0 += tmp; break;
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case Axis.Position.HIGH: chart.evarea.x1 -= tmp; break;
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}
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}
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// 4.5. Draw Axis title
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if (axis_y.title.text != "") {
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var scr_y = chart.plarea.y0 + chart.plarea.height * (1 - (place.zy0 + place.zy1) / 2);
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switch (axis_y.position) {
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case Axis.Position.LOW:
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var scr_x = chart.evarea.x0 + axis_y.font.hspacing + axis_y.title.width;
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chart.ctx.move_to(scr_x, scr_y + axis_y.title.height / 2);
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break;
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case Axis.Position.HIGH:
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var scr_x = chart.evarea.x1 - axis_y.font.hspacing;
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chart.ctx.move_to(scr_x, scr_y + axis_y.title.height / 2);
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break;
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}
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chart.color = axis_y.color;
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if (chart.joint_y) chart.color = chart.joint_color;
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axis_y.title.show();
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}
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draw_vertical_records (step, max_rec_width, y_min);
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chart.ctx.stroke ();
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var tmp1 = 0.0, tmp2 = 0.0, tmp3 = 0.0, tmp4 = 0.0;
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join_relative_y_axes (si, false, ref tmp1, ref tmp2, ref tmp3, ref tmp4, ref nskip);
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if (nskip != 0) {--nskip; return;}
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var tmp = max_rec_width + axis_y.font.hspacing + (axis_y.title.text == "" ? 0 : axis_y.title.width + axis_y.font.hspacing);
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switch (axis_y.position) {
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case Axis.Position.LOW: chart.evarea.x0 += tmp; break;
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case Axis.Position.HIGH: chart.evarea.x1 -= tmp; break;
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}
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}
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/**
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* Gets compact placement X-position on the screen.
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* @param x real ``Series`` X-value.
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* @param text to place on the screen.
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*/
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public virtual double compact_rec_x_pos (Float128 x, Text text) {
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return get_scr_x(x) - text.width / 2
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- text.width * (x - (axis_x.range.zmin + axis_x.range.zmax) / 2) / axis_x.range.zrange;
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}
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/**
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* Gets compact placement Y-position on the screen.
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* @param y real ``Series`` Y-value.
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* @param text to place on the screen.
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*/
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public virtual double compact_rec_y_pos (Float128 y, Text text) {
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return get_scr_y(y) + text.height / 2
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+ text.height * (y - (axis_y.range.zmin + axis_y.range.zmax) / 2) / axis_y.range.zrange;
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}
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/**
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* Gets screen X-position by real ``Series`` X-value.
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* @param x real ``Series`` X-value.
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*/
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public virtual double get_scr_x (Float128 x) {
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return chart.plarea.x0 + chart.plarea.width * (place.zx0 + (x - axis_x.range.zmin) / axis_x.range.zrange * place.zwidth);
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}
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/**
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* Gets screen Y-position by real ``Series`` Y-value.
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* @param y real ``Series`` Y-value.
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*/
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public virtual double get_scr_y (Float128 y) {
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return chart.plarea.y0 + chart.plarea.height * (1 - (place.zy0 + (y - axis_y.range.zmin) / axis_y.range.zrange * place.zheight));
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}
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/**
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* Gets screen point by real ``Series`` (X;Y) value.
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* @param p real ``Series`` (X;Y) value.
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*/
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public virtual Point get_scr_point (Point128 p) {
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return Point (get_scr_x(p.x), get_scr_y(p.y));
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}
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/**
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* Gets real ``Series`` X-value by plot area screen X-position.
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* @param scr_x screen X-position.
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*/
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public virtual Float128 get_real_x (double scr_x) {
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return axis_x.range.zmin + ((scr_x - chart.plarea.x0) / chart.plarea.width - place.zx0) * axis_x.range.zrange / place.zwidth;
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}
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/**
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* Gets real ``Series`` Y-value by plot area screen Y-position.
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* @param scr_y screen Y-position.
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*/
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public virtual Float128 get_real_y (double scr_y) {
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return axis_y.range.zmin + ((chart.plarea.y1 - scr_y) / chart.plarea.height - place.zy0) * axis_y.range.zrange / place.zheight;
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}
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/**
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* Gets real ``Series`` (X;Y) value by plot area screen point.
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* @param p (X;Y) screen point.
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*/
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public virtual Point128 get_real_point (Point p) {
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return Point128 (get_real_x(p.x), get_real_y(p.y));
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}
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/**
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* Zooms out the ``Series``.
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*/
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public virtual void zoom_out () {
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zoom_show = true;
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axis_x.zoom_out();
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axis_y.zoom_out();
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place.zoom_out();
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}
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protected virtual void calc_rec_sizes (Axis axis, 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 < axis.nrecords; ++i) {
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Float128 x = (int64)(axis.range.zmin + axis.range.zrange / axis.nrecords * i) + 1/3.0;
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switch (axis.dtype) {
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case Axis.DType.NUMBERS:
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var text = new Text (chart, axis.format.printf((LongDouble)x) + (horizontal ? "_" : ""), axis.font);
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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);
|
|
break;
|
|
case Axis.DType.DATE_TIME:
|
|
string date, time;
|
|
axis.print_dt(x, out date, out time);
|
|
|
|
var h = 0.0;
|
|
if (axis.date_format != "") {
|
|
var text = new Text (chart, date + (horizontal ? "_" : ""), axis.font);
|
|
max_rec_width = double.max (max_rec_width, text.width);
|
|
h = text.height;
|
|
}
|
|
if (axis.time_format != "") {
|
|
var text = new Text (chart, time + (horizontal ? "_" : ""), axis.font);
|
|
max_rec_width = double.max (max_rec_width, text.width);
|
|
h += text.height;
|
|
}
|
|
max_rec_height = double.max (max_rec_height, h);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
protected virtual void join_relative_x_axes (int si,
|
|
bool calc_max_values,
|
|
ref double max_rec_width,
|
|
ref double max_rec_height,
|
|
ref double max_font_spacing,
|
|
ref double max_axis_font_height,
|
|
ref int nskip) {
|
|
for (int sj = si - 1; sj >= 0; --sj) {
|
|
var s2 = chart.series[sj];
|
|
if (!s2.zoom_show) continue;
|
|
bool has_intersection = false;
|
|
for (int sk = si; sk > sj; --sk) {
|
|
var s3 = chart.series[sk];
|
|
if (!s3.zoom_show) continue;
|
|
if (Math.coord_cross(s2.place.zx0, s2.place.zx1, s3.place.zx0, s3.place.zx1)
|
|
|| s2.axis_x.position != s3.axis_x.position
|
|
|| s2.axis_x.dtype != s3.axis_x.dtype) {
|
|
has_intersection = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!has_intersection) {
|
|
if (calc_max_values) {
|
|
var tmp_max_rec_width = 0.0, tmp_max_rec_height = 0.0;
|
|
calc_rec_sizes (s2.axis_x, out tmp_max_rec_width, out tmp_max_rec_height, true);
|
|
max_rec_width = double.max (max_rec_width, tmp_max_rec_width);
|
|
max_rec_height = double.max (max_rec_height, tmp_max_rec_height);
|
|
max_font_spacing = double.max (max_font_spacing, s2.axis_x.font.vspacing);
|
|
max_axis_font_height = double.max (max_axis_font_height, s2.axis_x.title.text == "" ? 0 :
|
|
s2.axis_x.title.height + this.axis_x.font.vspacing);
|
|
}
|
|
++nskip;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
protected virtual void join_relative_y_axes (int si,
|
|
bool calc_max_values,
|
|
ref double max_rec_width,
|
|
ref double max_rec_height,
|
|
ref double max_font_spacing,
|
|
ref double max_axis_font_width,
|
|
ref int nskip) {
|
|
for (int sj = si - 1; sj >= 0; --sj) {
|
|
var s2 = chart.series[sj];
|
|
if (!s2.zoom_show) continue;
|
|
bool has_intersection = false;
|
|
for (int sk = si; sk > sj; --sk) {
|
|
var s3 = chart.series[sk];
|
|
if (!s3.zoom_show) continue;
|
|
if (Math.coord_cross(s2.place.zy0, s2.place.zy1, s3.place.zy0, s3.place.zy1)
|
|
|| s2.axis_y.position != s3.axis_y.position
|
|
|| s2.axis_y.dtype != s3.axis_y.dtype) {
|
|
has_intersection = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!has_intersection) {
|
|
var tmp_max_rec_width = 0.0, tmp_max_rec_height = 0.0;
|
|
calc_rec_sizes (s2.axis_y, out tmp_max_rec_width, out tmp_max_rec_height, false);
|
|
max_rec_width = double.max (max_rec_width, tmp_max_rec_width);
|
|
max_rec_height = double.max (max_rec_height, tmp_max_rec_height);
|
|
max_font_spacing = double.max (max_font_spacing, s2.axis_y.font.hspacing);
|
|
max_axis_font_width = double.max (max_axis_font_width, s2.axis_y.title.text == "" ? 0
|
|
: s2.axis_y.title.width + this.axis_y.font.hspacing);
|
|
++nskip;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
protected virtual void draw_horizontal_records (Float128 step, double max_rec_height, Float128 x_min) {
|
|
// 5. Draw records, update cur_{x,y}_{min,max}.
|
|
var ctx = chart.ctx;
|
|
var joint_x = chart.joint_x;
|
|
|
|
for (Float128 x = x_min, x_max = axis_x.range.zmax; Math.point_belong (x, x_min, x_max); x += step) {
|
|
if (joint_x) chart.color = chart.joint_color;
|
|
else chart.color = axis_x.color;
|
|
string text = "", time_text = "";
|
|
switch (axis_x.dtype) {
|
|
case Axis.DType.NUMBERS: text = axis_x.format.printf((LongDouble)x); break;
|
|
case Axis.DType.DATE_TIME: axis_x.print_dt(x, out text, out time_text); break;
|
|
}
|
|
var scr_x = get_scr_x (x);
|
|
var text_t = new Text(chart, text, axis_x.font, axis_x.color);
|
|
|
|
switch (axis_x.position) {
|
|
case Axis.Position.LOW:
|
|
var print_y = chart.evarea.y1 - axis_x.font.vspacing - (axis_x.title.text == "" ? 0 : axis_x.title.height + axis_x.font.vspacing);
|
|
var print_x = compact_rec_x_pos (x, text_t);
|
|
ctx.move_to (print_x, print_y);
|
|
switch (axis_x.dtype) {
|
|
case Axis.DType.NUMBERS:
|
|
text_t.show();
|
|
break;
|
|
case Axis.DType.DATE_TIME:
|
|
if (axis_x.date_format != "") text_t.show();
|
|
var time_text_t = new Text(chart, time_text, axis_x.font, axis_x.color);
|
|
print_x = compact_rec_x_pos (x, time_text_t);
|
|
ctx.move_to (print_x, print_y - (axis_x.date_format == "" ? 0 : text_t.height + axis_x.font.vspacing));
|
|
if (axis_x.time_format != "") time_text_t.show();
|
|
break;
|
|
}
|
|
// 6. Draw grid lines to the place.zy0.
|
|
var grid_style = grid.style;
|
|
if (joint_x) grid_style.color = Color(0, 0, 0, 0.5);
|
|
grid_style.apply(chart);
|
|
double y = chart.evarea.y1 - max_rec_height - axis_x.font.vspacing - (axis_x.title.text == "" ? 0 : axis_x.title.height + axis_x.font.vspacing);
|
|
ctx.move_to (scr_x, y);
|
|
if (joint_x)
|
|
ctx.line_to (scr_x, chart.plarea.y0);
|
|
else
|
|
ctx.line_to (scr_x, double.min (y, chart.plarea.y0 + chart.plarea.height * (1 - place.zy1)));
|
|
break;
|
|
case Axis.Position.HIGH:
|
|
var print_y = chart.evarea.y0 + max_rec_height + axis_x.font.vspacing + (axis_x.title.text == "" ? 0 : axis_x.title.height + axis_x.font.vspacing);
|
|
var print_x = compact_rec_x_pos (x, text_t);
|
|
ctx.move_to (print_x, print_y);
|
|
|
|
switch (axis_x.dtype) {
|
|
case Axis.DType.NUMBERS:
|
|
text_t.show();
|
|
break;
|
|
case Axis.DType.DATE_TIME:
|
|
if (axis_x.date_format != "") text_t.show();
|
|
var time_text_t = new Text(chart, time_text, axis_x.font, axis_x.color);
|
|
print_x = compact_rec_x_pos (x, time_text_t);
|
|
ctx.move_to (print_x, print_y - (axis_x.date_format == "" ? 0 : text_t.height + axis_x.font.vspacing));
|
|
if (axis_x.time_format != "") time_text_t.show();
|
|
break;
|
|
}
|
|
// 6. Draw grid lines to the place.zy1.
|
|
var grid_style = grid.style;
|
|
if (joint_x) grid_style.color = Color(0, 0, 0, 0.5);
|
|
grid_style.apply(chart);
|
|
double y = chart.evarea.y0 + max_rec_height + axis_x.font.vspacing + (axis_x.title.text == "" ? 0 : axis_x.title.height + axis_x.font.vspacing);
|
|
ctx.move_to (scr_x, y);
|
|
if (joint_x)
|
|
ctx.line_to (scr_x, chart.plarea.y1);
|
|
else
|
|
ctx.line_to (scr_x, double.max (y, chart.plarea.y0 + chart.plarea.height * (1 - place.zy0)));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
protected virtual void draw_vertical_records (Float128 step, double max_rec_width, Float128 y_min) {
|
|
// 5. Draw records, update cur_{x,y}_{min,max}.
|
|
var ctx = chart.ctx;
|
|
var joint_y = chart.joint_y;
|
|
|
|
for (Float128 y = y_min, y_max = axis_y.range.zmax; Math.point_belong (y, y_min, y_max); y += step) {
|
|
if (joint_y) chart.color = chart.joint_color;
|
|
else chart.color = axis_y.color;
|
|
var text = axis_y.format.printf((LongDouble)y);
|
|
var scr_y = get_scr_y (y);
|
|
var text_t = new Text(chart, text, axis_y.font, axis_y.color);
|
|
|
|
switch (axis_y.position) {
|
|
case Axis.Position.LOW:
|
|
ctx.move_to (chart.evarea.x0 + max_rec_width - text_t.width + axis_y.font.hspacing
|
|
+ (axis_y.title.text == "" ? 0 : axis_y.title.width + axis_y.font.hspacing),
|
|
compact_rec_y_pos (y, text_t));
|
|
text_t.show();
|
|
// 6. Draw grid lines to the place.zx0.
|
|
var grid_style = grid.style;
|
|
if (joint_y) grid_style.color = Color(0, 0, 0, 0.5);
|
|
grid_style.apply(chart);
|
|
double x = chart.evarea.x0 + max_rec_width + axis_y.font.hspacing + (axis_y.title.text == "" ? 0 : axis_y.title.width + axis_y.font.hspacing);
|
|
ctx.move_to (x, scr_y);
|
|
if (joint_y)
|
|
ctx.line_to (chart.plarea.x1, scr_y);
|
|
else
|
|
ctx.line_to (double.max (x, chart.plarea.x0 + chart.plarea.width * place.zx1), scr_y);
|
|
break;
|
|
case Axis.Position.HIGH:
|
|
ctx.move_to (chart.evarea.x1 - text_t.width - axis_y.font.hspacing
|
|
- (axis_y.title.text == "" ? 0 : axis_y.title.width + axis_y.font.hspacing),
|
|
compact_rec_y_pos (y, text_t));
|
|
text_t.show();
|
|
// 6. Draw grid lines to the place.zx1.
|
|
var grid_style = grid.style;
|
|
if (joint_y) grid_style.color = Color(0, 0, 0, 0.5);
|
|
grid_style.apply(chart);
|
|
double x = chart.evarea.x1 - max_rec_width - axis_y.font.hspacing - (axis_y.title.text == "" ? 0 : axis_y.title.width + axis_y.font.hspacing);
|
|
ctx.move_to (x, scr_y);
|
|
if (joint_y)
|
|
ctx.line_to (chart.plarea.x0, scr_y);
|
|
else
|
|
ctx.line_to (double.min (x, chart.plarea.x0 + chart.plarea.width * place.zx0), scr_y);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|