CursorCrossings[] added.
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22761fa04f
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184
src/Chart.vala
184
src/Chart.vala
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@ -55,6 +55,8 @@ namespace Gtk.CairoChart {
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set_vertical_axes_titles ();
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get_cursors_crossings();
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calc_plot_area (); // Calculate plot area
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draw_horizontal_axis ();
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@ -1276,78 +1278,31 @@ namespace Gtk.CairoChart {
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public LineStyle cursor_line_style = LineStyle(Color(0.2, 0.2, 0.2, 0.8));
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protected virtual bool get_cursor_limits (Series s, Point cursor, out Point low, out Point high) {
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bool ret = false;
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low.x = plot_area_x_max;
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low.y = plot_area_y_max;
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high.x = plot_area_x_min;
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high.y = plot_area_y_min;
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Point[] points = {};
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switch (cursors_orientation) {
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case CursorOrientation.VERTICAL:
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points = sort_points (s, s.sort);
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break;
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case CursorOrientation.HORIZONTAL:
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points = sort_points (s, s.sort);
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break;
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}
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for (var i = 0; i + 1 < points.length; ++i) {
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switch (cursors_orientation) {
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case CursorOrientation.VERTICAL:
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Float128 y = 0.0;
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if (vcross(get_scr_point(s, points[i]), get_scr_point(s, points[i+1]), rel2scr_x(cursor.x),
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plot_area_y_min, plot_area_y_max, out y)) {
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if (y < low.y /*&& y_in_plot_area(y)*/) low.y = y;
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if (y > high.y /*&& y_in_plot_area(y)*/) high.y = y;
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ret = true;
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}
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break;
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case CursorOrientation.HORIZONTAL:
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Float128 x = 0.0;
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if (hcross(get_scr_point(s, points[i]), get_scr_point(s, points[i+1]),
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plot_area_x_min, plot_area_x_max, rel2scr_y(cursor.y), out x)) {
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if (x < low.x /*&& x_in_plot_area(x)*/) low.x = x;
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if (x > high.x /*&& x_in_plot_area(x)*/) high.x = x;
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ret = true;
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}
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break;
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}
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}
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if (common_x_axes) {
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switch (s.axis_x.position) {
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case Axis.Position.LOW: high.y = plot_area_y_max + s.axis_x.font_indent; break;
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case Axis.Position.HIGH: low.y = plot_area_y_min - s.axis_x.font_indent; break;
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case Axis.Position.BOTH:
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high.y = plot_area_y_max + s.axis_x.font_indent;
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low.y = plot_area_y_min - s.axis_x.font_indent;
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break;
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}
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ret = true;
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}
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if (common_y_axes) {
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switch (s.axis_y.position) {
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case Axis.Position.LOW: low.x = plot_area_x_min - s.axis_y.font_indent; break;
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case Axis.Position.HIGH: high.x = plot_area_x_max + s.axis_y.font_indent; break;
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case Axis.Position.BOTH:
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low.x = plot_area_x_min - s.axis_y.font_indent;
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high.x = plot_area_x_max + s.axis_y.font_indent;
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break;
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}
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ret = true;
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}
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return ret;
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protected struct CursorCross {
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uint series_index;
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Point point;
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}
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protected struct CursorCrossings {
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uint cursor_index;
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CursorCross[] crossings;
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}
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protected virtual void draw_cursors () {
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if (series.length == 0) return;
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protected CursorCrossings[] cursors_crossings = {};
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protected List<Point?> get_all_cursors () {
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var all_cursors = cursors.copy_deep ((src) => { return src; });
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if (is_cursor_active)
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all_cursors.append(active_cursor);
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return all_cursors;
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}
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foreach (var c in all_cursors) {
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protected void get_cursors_crossings () {
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var all_cursors = get_all_cursors();
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CursorCrossings[] local_cursor_crossings = {};
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for (var ci = 0, max_ci = all_cursors.length(); ci < max_ci; ++ci) {
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var c = all_cursors.nth_data(ci);
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switch (cursors_orientation) {
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case CursorOrientation.VERTICAL:
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if (c.x <= _rel_zoom_x_min || c.x >= _rel_zoom_x_max) continue; break;
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@ -1355,23 +1310,103 @@ namespace Gtk.CairoChart {
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if (c.y <= _rel_zoom_y_min || c.y >= _rel_zoom_y_max) continue; break;
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}
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var low = Point(plot_area_x_max, plot_area_y_max); // low and high
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var high = Point(plot_area_x_min, plot_area_y_min); // points of the cursor
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foreach (var s in series) {
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CursorCross[] crossings = {};
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for (var si = 0, max_si = series.length; si < max_si; ++si) {
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var s = series[si];
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if (!s.zoom_show) continue;
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var l = Point(), h = Point();
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if (get_cursor_limits (s, c, out l, out h)) {
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if (l.x < low.x) low.x = l.x;
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if (l.y < low.y) low.y = l.y;
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if (h.x > high.x) high.x = h.x;
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if (h.y > high.y) high.y = h.y;
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Point[] points = {};
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switch (cursors_orientation) {
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case CursorOrientation.VERTICAL:
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points = sort_points (s, s.sort);
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break;
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case CursorOrientation.HORIZONTAL:
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points = sort_points (s, s.sort);
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break;
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}
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for (var i = 0; i + 1 < points.length; ++i) {
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switch (cursors_orientation) {
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case CursorOrientation.VERTICAL:
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Float128 y = 0.0;
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if (vcross(get_scr_point(s, points[i]), get_scr_point(s, points[i+1]), rel2scr_x(c.x),
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plot_area_y_min, plot_area_y_max, out y)) {
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CursorCross cc = {si, Point(get_real_x(s, rel2scr_x(c.x)), get_real_y(s, y))};
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crossings += cc;
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//stdout.printf("si = %d, rel2scr_x(c.x) = %f, y = %f\n", si, rel2scr_x(c.x), y);
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}
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break;
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case CursorOrientation.HORIZONTAL:
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Float128 x = 0.0;
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if (hcross(get_scr_point(s, points[i]), get_scr_point(s, points[i+1]),
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plot_area_x_min, plot_area_x_max, rel2scr_y(c.y), out x)) {
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CursorCross cc = {si, Point(get_real_x(s, x), get_real_y(s, rel2scr_y(c.y)))};
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crossings += cc;
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}
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break;
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}
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}
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}
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if (crossings.length != 0) {
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CursorCrossings ccs = {ci, crossings};
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local_cursor_crossings += ccs;
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}
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}
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cursors_crossings = local_cursor_crossings;
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//if (cursors_crossings.length != 0)
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//stdout.printf("cursors_crossings[0].crossings.length = %d\n", cursors_crossings[0].crossings.length);
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}
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protected virtual void draw_cursors () {
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if (series.length == 0) return;
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var all_cursors = get_all_cursors();
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for (var cci = 0, max_cci = cursors_crossings.length; cci < max_cci; ++cci) {
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var low = Point(plot_area_x_max, plot_area_y_max); // low and high
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var high = Point(plot_area_x_min, plot_area_y_min); // points of the cursor
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var ccs = cursors_crossings[cci].crossings;
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for (var ci = 0, max_ci = ccs.length; ci < max_ci; ++ci) {
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var si = ccs[ci].series_index;
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var s = series[si];
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var p = ccs[ci].point;
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var scrx = get_scr_x(s, p.x);
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var scry = get_scr_y(s, p.y);
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if (scrx < low.x) low.x = scrx;
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//stdout.printf("low.y = %f, high.y = %f\n", low.y, high.y);
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if (scry < low.y) low.y = scry;
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if (scrx > high.x) high.x = scrx;
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if (scry > high.y) high.y = scry;
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if (common_x_axes) {
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switch (s.axis_x.position) {
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case Axis.Position.LOW: high.y = plot_area_y_max + s.axis_x.font_indent; break;
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case Axis.Position.HIGH: low.y = plot_area_y_min - s.axis_x.font_indent; break;
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case Axis.Position.BOTH:
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high.y = plot_area_y_max + s.axis_x.font_indent;
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low.y = plot_area_y_min - s.axis_x.font_indent;
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break;
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}
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}
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if (common_y_axes) {
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switch (s.axis_y.position) {
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case Axis.Position.LOW: low.x = plot_area_x_min - s.axis_y.font_indent; break;
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case Axis.Position.HIGH: high.x = plot_area_x_max + s.axis_y.font_indent; break;
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case Axis.Position.BOTH:
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low.x = plot_area_x_min - s.axis_y.font_indent;
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high.x = plot_area_x_max + s.axis_y.font_indent;
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break;
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}
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}
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}
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var c = all_cursors.nth_data(cursors_crossings[cci].cursor_index);
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switch (cursors_orientation) {
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case CursorOrientation.VERTICAL:
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if (low.y > high.y) continue;
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set_line_style(cursor_line_style);
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//stdout.printf("rel2scr_x(c.x) = %f, low.y = %f\n", rel2scr_x(c.x), low.y);
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context.move_to (rel2scr_x(c.x), low.y);
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context.line_to (rel2scr_x(c.x), high.y);
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context.stroke();
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@ -1419,6 +1454,7 @@ namespace Gtk.CairoChart {
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chart.cursor_line_style = this.cursor_line_style;
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chart.cursor_max_rm_distance = this.cursor_max_rm_distance;
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chart.cursors = this.cursors.copy();
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chart.cursors_crossings = this.cursors_crossings.copy(); // no deep copying for .crossings
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chart.cursors_orientation = this.cursors_orientation;
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chart.height = this.height;
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chart.is_cursor_active = this.is_cursor_active;
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