Show cursors crossings values.
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parent
f4b89194d6
commit
c676f7eea0
233
src/Chart.vala
233
src/Chart.vala
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@ -463,12 +463,12 @@ namespace Gtk.CairoChart {
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process_legend (LegendProcessType.DRAW);
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}
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int axis_rec_npoints = 128;
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protected int axis_rec_npoints = 128;
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protected virtual void calc_axis_rec_sizes (Axis axis, out double max_rec_width, out double max_rec_height, bool is_horizontal = true) {
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max_rec_width = max_rec_height = 0;
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for (var i = 0; i < axis_rec_npoints; ++i) {
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Float128 x = axis.zoom_min + (axis.zoom_max - axis.zoom_min) / axis_rec_npoints * i;
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Float128 x = (int64)(axis.zoom_min + (axis.zoom_max - axis.zoom_min) / axis_rec_npoints * i) + 1.0/3.0;
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switch (axis.type) {
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case Axis.Type.NUMBERS:
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var text = new Text (axis.format.printf((LongDouble)x) + (is_horizontal ? "_" : ""));
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@ -477,18 +477,19 @@ namespace Gtk.CairoChart {
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max_rec_height = double.max (max_rec_height, text.get_height(context));
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break;
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case Axis.Type.DATE_TIME:
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var dt = new DateTime.from_unix_utc((int64)x);
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string date, time;
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format_date_time(axis, x, out date, out time);
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var text = new Text("");
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var h = 0.0;
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if (axis.date_format != "") {
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text = new Text (dt.format(axis.date_format) + (is_horizontal ? "_" : ""));
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text = new Text (date + (is_horizontal ? "_" : ""));
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text.style = axis.font_style;
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max_rec_width = double.max (max_rec_width, text.get_width(context));
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h = text.get_height(context);
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}
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if (axis.time_format != "") {
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var dsec_str = ("%."+(axis.dsec_signs.to_string())+"f").printf(1.0/3.0).offset(1);
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text = new Text (dt.format(axis.time_format) + (is_horizontal ? "_" : "") + dsec_str);
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text = new Text (time + (is_horizontal ? "_" : ""));
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text.style = axis.font_style;
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max_rec_width = double.max (max_rec_width, text.get_width(context));
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h += text.get_height(context);
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@ -541,14 +542,14 @@ namespace Gtk.CairoChart {
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}
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protected virtual void calc_plot_area () {
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plot_area_x_min = cur_x_min + legend.indent;
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plot_area_x_max = cur_x_max - legend.indent;
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plot_area_y_min = cur_y_min + legend.indent;
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plot_area_y_max = cur_y_max - legend.indent;
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plot_area_x_min = cur_x_min + legend.indent;
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plot_area_x_max = cur_x_max - legend.indent;
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plot_area_y_min = cur_y_min + legend.indent;
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plot_area_y_max = cur_y_max - legend.indent;
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// Check for common axes
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common_x_axes = common_y_axes = true;
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int nzoom_series_show = 0;
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// Check for common axes
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common_x_axes = common_y_axes = true;
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int nzoom_series_show = 0;
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for (var si = series.length - 1; si >=0; --si) {
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var s = series[si];
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if (!s.zoom_show) continue;
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@ -694,6 +695,15 @@ namespace Gtk.CairoChart {
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+ text.get_height(context) * (y - (s.axis_y.zoom_min + s.axis_y.zoom_max) / 2.0) / (s.axis_y.zoom_max - s.axis_y.zoom_min);
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}
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protected virtual void format_date_time (Axis axis, 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(axis.date_format);
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var dsec_str =
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("%."+(axis.dsec_signs.to_string())+"Lf").printf((LongDouble)(x - (int64)x)).offset(1);
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time = dt.format(axis.time_format) + dsec_str;
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}
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protected virtual void draw_horizontal_axis () {
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for (var si = series.length - 1, nskip = 0; si >=0; --si) {
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var s = series[si];
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@ -756,11 +766,7 @@ namespace Gtk.CairoChart {
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text = s.axis_x.format.printf((LongDouble)x);
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break;
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case Axis.Type.DATE_TIME:
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var dt = new DateTime.from_unix_utc((int64)x);
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text = dt.format(s.axis_x.date_format);
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var dsec_str =
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("%."+(s.axis_x.dsec_signs.to_string())+"Lf").printf((LongDouble)(x - (int64)x)).offset(1);
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time_text = dt.format(s.axis_x.time_format) + dsec_str;
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format_date_time(s.axis_x, x, out text, out time_text);
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break;
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}
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var scr_x = get_scr_x (s, x);
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@ -1261,6 +1267,13 @@ namespace Gtk.CairoChart {
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protected struct CursorCross {
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uint series_index;
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Point point;
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Point size;
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bool show_x;
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bool show_date;
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bool show_time;
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bool show_y;
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Point scr_point;
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Point scr_value_point;
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}
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protected struct CursorCrossings {
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uint cursor_index;
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@ -1311,16 +1324,24 @@ namespace Gtk.CairoChart {
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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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var point = Point(get_real_x(s, rel2scr_x(c.x)), get_real_y(s, y));
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Point size; bool show_x, show_date, show_time, show_y;
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cross_what_to_show(s, out show_x, out show_time, out show_date, out show_y);
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calc_cross_sizes (s, point, out size, show_x, show_time, show_date, show_y);
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CursorCross cc = {si, point, size, show_x, show_date, show_time, show_y};
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crossings += cc;
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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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var point = Point(get_real_x(s, x), get_real_y(s, rel2scr_y(c.y)));
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Point size; bool show_x, show_date, show_time, show_y;
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cross_what_to_show(s, out show_x, out show_time, out show_date, out show_y);
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calc_cross_sizes (s, point, out size, show_x, show_time, show_date, show_y);
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CursorCross cc = {si, point, size, show_x, show_date, show_time, show_y};
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crossings += cc;
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}
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break;
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}
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@ -1334,15 +1355,79 @@ namespace Gtk.CairoChart {
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cursors_crossings = local_cursor_crossings;
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}
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protected virtual void calc_cursors_value_positions () {
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for (var ccsi = 0, max_ccsi = cursors_crossings.length; ccsi < max_ccsi; ++ccsi) {
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for (var cci = 0, max_cci = cursors_crossings[ccsi].crossings.length; cci < max_cci; ++cci) {
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// TODO: Ticket #142: find smart algorithm of cursors values placements
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unowned CursorCross[] cr = cursors_crossings[ccsi].crossings;
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cr[cci].scr_point = get_scr_point (series[cr[cci].series_index], cr[cci].point);
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var d_max = double.max (cr[cci].size.x / 1.5, cr[cci].size.y / 1.5);
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cr[cci].scr_value_point = Point (cr[cci].scr_point.x + d_max, cr[cci].scr_point.y - d_max);
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}
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}
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}
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protected virtual void cross_what_to_show (Series s, out bool show_x, out bool show_time,
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out bool show_date, out bool show_y) {
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show_x = show_time = show_date = show_y = false;
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switch (cursors_orientation) {
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case CursorOrientation.VERTICAL:
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show_y = true;
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if (!common_x_axes)
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switch (s.axis_x.type) {
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case Axis.Type.NUMBERS: show_x = true; break;
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case Axis.Type.DATE_TIME:
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if (s.axis_x.date_format != "") show_date = true;
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if (s.axis_x.time_format != "") show_time = true;
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break;
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}
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break;
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case CursorOrientation.HORIZONTAL:
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if (!common_y_axes) show_y = true;
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switch (s.axis_x.type) {
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case Axis.Type.NUMBERS: show_x = true; break;
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case Axis.Type.DATE_TIME:
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if (s.axis_x.date_format != "") show_date = true;
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if (s.axis_x.time_format != "") show_time = true;
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break;
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}
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break;
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}
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}
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protected virtual void calc_cross_sizes (Series s, Point p, out Point size,
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bool show_x = false, bool show_time = false,
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bool show_date = false, bool show_y = false) {
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if (show_x == show_time == show_date == show_y == false)
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cross_what_to_show(s, out show_x, out show_time, out show_date, out show_y);
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size = Point ();
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double x_w = 0.0, x_h = 0.0, y_w = 0.0, y_h = 0.0;
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string date, time;
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format_date_time(s.axis_x, p.x, out date, out time);
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var date_t = new Text (date, s.axis_x.font_style, s.axis_x.color);
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var time_t = new Text (time, s.axis_x.font_style, s.axis_x.color);
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var x_t = new Text (s.axis_x.format.printf((LongDouble)p.x), s.axis_x.font_style, s.axis_x.color);
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var y_t = new Text (s.axis_y.format.printf((LongDouble)p.y), s.axis_y.font_style, s.axis_y.color);
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double h_x = 0.0, h_y = 0.0;
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if (show_x) { size.x = x_t.get_width(context); h_x = x_t.get_height(context); }
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if (show_date) { size.x = date_t.get_width(context); h_x = date_t.get_height(context); }
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if (show_time) { size.x = double.max(size.x, time_t.get_width(context)); h_x += time_t.get_height(context); }
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if (show_y) { size.x += y_t.get_width(context); h_y = y_t.get_height(context); }
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if ((show_x || show_date || show_time) && show_y) size.x += double.max(s.axis_x.font_indent, s.axis_y.font_indent);
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if (show_date && show_time) h_x += s.axis_x.font_indent;
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size.y = double.max (h_x, h_y);
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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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calc_cursors_value_positions();
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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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unowned CursorCross[] 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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@ -1374,10 +1459,14 @@ namespace Gtk.CairoChart {
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break;
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}
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}
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set_line_style(cursor_line_style);
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context.move_to (ccs[ci].scr_point.x, ccs[ci].scr_point.y);
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context.line_to (ccs[ci].scr_value_point.x, ccs[ci].scr_value_point.y);
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context.stroke ();
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}
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var c = all_cursors.nth_data(cursors_crossings[cci].cursor_index);
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var s = series[zoom_first_show];
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switch (cursors_orientation) {
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case CursorOrientation.VERTICAL:
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@ -1387,9 +1476,9 @@ namespace Gtk.CairoChart {
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context.line_to (rel2scr_x(c.x), high.y);
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context.stroke();
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// TODO: show values
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// show common X value
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if (common_x_axes) {
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// show common X value
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var s = series[zoom_first_show];
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var x = get_real_x(s, rel2scr_x(c.x));
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string text = "", time_text = "";
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switch (s.axis_x.type) {
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text = s.axis_x.format.printf((LongDouble)x);
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break;
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case Axis.Type.DATE_TIME:
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var dt = new DateTime.from_unix_utc((int64)x);
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text = dt.format(s.axis_x.date_format);
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var dsec_str =
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("%."+(s.axis_x.dsec_signs.to_string())+"Lf").printf((LongDouble)(x - (int64)x)).offset(1);
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time_text = dt.format(s.axis_x.time_format) + dsec_str;
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format_date_time(s.axis_x, x, out text, out time_text);
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break;
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default:
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break;
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@ -1411,19 +1496,19 @@ namespace Gtk.CairoChart {
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var print_y = 0.0;
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switch (s.axis_x.position) {
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case Axis.Position.LOW: print_y = y_min + height - s.axis_x.font_indent
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- (legend.position == Legend.Position.BOTTOM ? legend_height : 0);
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- (legend.position == Legend.Position.BOTTOM ? legend_height : 0);
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break;
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case Axis.Position.HIGH: print_y = y_min + title_height + s.axis_x.font_indent
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+ (legend.position == Legend.Position.TOP ? legend_height : 0);
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+ (legend.position == Legend.Position.TOP ? legend_height : 0);
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switch (s.axis_x.type) {
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case Axis.Type.NUMBERS:
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print_y += text_t.get_height(context);
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break;
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case Axis.Type.DATE_TIME:
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print_y += (s.axis_x.date_format == "" ? 0 : text_t.get_height(context))
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+ (s.axis_x.time_format == "" ? 0 : time_text_t.get_height(context))
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+ (s.axis_x.date_format == "" || s.axis_x.time_format == "" ? 0 : s.axis_x.font_indent);
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break;
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+ (s.axis_x.time_format == "" ? 0 : time_text_t.get_height(context))
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+ (s.axis_x.date_format == "" || s.axis_x.time_format == "" ? 0 : s.axis_x.font_indent);
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break;
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}
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break;
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}
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@ -1443,11 +1528,6 @@ namespace Gtk.CairoChart {
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}
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context.stroke ();
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// show only Y value
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;
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} else {
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// show [X;Y]
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}
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break;
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case CursorOrientation.HORIZONTAL:
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@ -1457,9 +1537,9 @@ namespace Gtk.CairoChart {
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context.line_to (high.x, rel2scr_y(c.y));
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context.stroke();
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// TODO: show values
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// show common Y value
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if (common_y_axes) {
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// show common Y value
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var s = series[zoom_first_show];
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var y = get_real_y(s, rel2scr_y(c.y));
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var text_t = new Text(s.axis_y.format.printf((LongDouble)y));
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var print_y = compact_rec_y_pos (s, y, text_t);
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show_text(text_t);
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context.stroke ();
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// show only X value
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;
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} else
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// show [X;Y]
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;
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}
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break;
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}
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// show value (X, Y or [X;Y])
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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 point = ccs[ci].point;
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var size = ccs[ci].size;
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var svp = ccs[ci].scr_value_point;
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var rp = get_real_point(s, rel2scr_point(point));
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var show_x = ccs[ci].show_x;
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var show_date = ccs[ci].show_date;
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var show_time = ccs[ci].show_time;
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var show_y = ccs[ci].show_y;
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set_source_rgba(bg_color);
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context.rectangle (svp.x - size.x / 2, svp.y - size.y / 2, size.x, size.y);
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context.fill();
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if (show_x) {
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set_source_rgba(s.axis_x.color);
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var text_t = new Text(s.axis_x.format.printf((LongDouble)point.x));
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context.move_to (svp.x - size.x / 2, svp.y + text_t.get_height(context) / 2);
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show_text(text_t);
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context.stroke();
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}
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if (show_time) {
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set_source_rgba(s.axis_x.color);
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string date = "", time = "";
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format_date_time(s.axis_x, point.x, out date, out time);
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var text_t = new Text(time);
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var y = svp.y + text_t.get_height(context) / 2;
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if (show_date) y -= text_t.get_height(context) / 2 + s.axis_x.font_indent / 2;
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context.move_to (svp.x - size.x / 2, y);
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show_text(text_t);
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context.stroke();
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}
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if (show_date) {
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set_source_rgba(s.axis_x.color);
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string date = "", time = "";
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format_date_time(s.axis_x, point.x, out date, out time);
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var text_t = new Text(date);
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var y = svp.y + text_t.get_height(context) / 2;
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if (show_time) y += text_t.get_height(context) / 2 + s.axis_x.font_indent / 2;
|
||||
context.move_to (svp.x - size.x / 2, y);
|
||||
show_text(text_t);
|
||||
context.stroke();
|
||||
}
|
||||
|
||||
if (show_y) {
|
||||
set_source_rgba(s.axis_y.color);
|
||||
var text_t = new Text(s.axis_y.format.printf((LongDouble)point.y));
|
||||
context.move_to (svp.x + size.x / 2 - text_t.get_width(context), svp.y + text_t.get_height(context) / 2);
|
||||
show_text(text_t);
|
||||
context.stroke();
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -1528,7 +1661,7 @@ namespace Gtk.CairoChart {
|
|||
chart.selection_style = this.selection_style;
|
||||
chart.series = this.series.copy();
|
||||
chart.show_legend = this.show_legend;
|
||||
chart.title = this.title.copy().copy();
|
||||
chart.title = this.title.copy();
|
||||
chart.title_height = this.title_height;
|
||||
chart.title_vindent = this.title_vindent;
|
||||
chart.title_width = this.title_width;
|
||||
|
|
Loading…
Reference in New Issue