OK draw_axes -> Series.vala, In progress...
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127
src/Chart.vala
127
src/Chart.vala
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@ -319,134 +319,13 @@ namespace CairoChart {
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public CairoChart.Math math = new Math();
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protected virtual void draw_horizontal_axes () {
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for (var si = series.length - 1, nskip = 0; si >=0; --si) {
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for (var si = series.length - 1, nskip = 0; si >=0; --si)
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series[si].draw_horizontal_axis (this, si, ref nskip);
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}
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}
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protected virtual void draw_vertical_records (Series s, Float128 step, double max_rec_width, Float128 y_min) {
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// 5. Draw records, update cur_{x,y}_{min,max}.
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for (Float128 y = y_min, y_max = s.axis_y.zoom_max; math.point_belong (y, y_min, y_max); y += step) {
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if (joint_y) set_source_rgba(joint_axis_color);
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else set_source_rgba(s.axis_y.color);
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var text = s.axis_y.format.printf((LongDouble)y);
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var scr_y = get_scr_y (s, y);
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var text_t = new Text(text, s.axis_y.font_style, s.axis_y.color);
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var text_sz = text_t.get_size(context);
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var sz = s.axis_y.title.get_size(context);
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switch (s.axis_y.position) {
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case Axis.Position.LOW:
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context.move_to (cur_x_min + max_rec_width - text_sz.width + s.axis_y.font_indent
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+ (s.axis_y.title.text == "" ? 0 : sz.width + s.axis_y.font_indent),
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compact_rec_y_pos (s, y, text_t));
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text_t.show(context);
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// 6. Draw grid lines to the s.place.zoom_x_min.
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var line_style = s.grid.line_style;
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if (joint_y) line_style.color = Color(0, 0, 0, 0.5);
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line_style.set(this);
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double x = cur_x_min + max_rec_width + s.axis_y.font_indent + (s.axis_y.title.text == "" ? 0 : sz.width + s.axis_y.font_indent);
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context.move_to (x, scr_y);
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if (joint_y)
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context.line_to (plot_x_max, scr_y);
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else
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context.line_to (double.max (x, plot_x_min + (plot_x_max - plot_x_min) * s.place.zoom_x_max), scr_y);
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break;
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case Axis.Position.HIGH:
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context.move_to (cur_x_max - text_sz.width - s.axis_y.font_indent
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- (s.axis_y.title.text == "" ? 0 : sz.width + s.axis_y.font_indent),
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compact_rec_y_pos (s, y, text_t));
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text_t.show(context);
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// 6. Draw grid lines to the s.place.zoom_x_max.
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var line_style = s.grid.line_style;
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if (joint_y) line_style.color = Color(0, 0, 0, 0.5);
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line_style.set(this);
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double x = cur_x_max - max_rec_width - s.axis_y.font_indent - (s.axis_y.title.text == "" ? 0 : sz.width + s.axis_y.font_indent);
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context.move_to (x, scr_y);
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if (joint_y)
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context.line_to (plot_x_min, scr_y);
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else
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context.line_to (double.min (x, plot_x_min + (plot_x_max - plot_x_min) * s.place.zoom_x_min), scr_y);
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break;
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}
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}
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}
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protected virtual void draw_vertical_axes () {
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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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if (!s.zoom_show) continue;
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if (joint_y && si != zoom_first_show) continue;
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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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s.axis_y.calc_rec_sizes (this, 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) ((plot_y_max - plot_y_min) * (s.place.zoom_y_max - s.place.zoom_y_min) / max_rec_height);
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// 3. Calculate grid step.
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Float128 step = math.calc_round_step ((s.axis_y.zoom_max - s.axis_y.zoom_min) / max_nrecs);
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if (step > s.axis_y.zoom_max - s.axis_y.zoom_min)
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step = s.axis_y.zoom_max - s.axis_y.zoom_min;
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// 4. Calculate y_min (s.axis_y.zoom_min / step, round, multiply on step, add step if < s.axis_y.zoom_min).
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Float128 y_min = 0.0;
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if (step >= 1) {
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int64 y_min_nsteps = (int64) (s.axis_y.zoom_min / 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)s.axis_y.zoom_min;
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int64 y_min_nsteps = (int64) ((s.axis_y.zoom_min - 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 < s.axis_y.zoom_min) y_min += step;
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// 4.2. Cursor values for joint Y axis
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if (joint_y && cursor_style.orientation == Cursor.Orientation.HORIZONTAL && cursors_crossings.length != 0) {
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switch (s.axis_y.position) {
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case Axis.Position.LOW: cur_x_min += max_rec_width + s.axis_y.font_indent; break;
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case Axis.Position.HIGH: cur_x_max -= max_rec_width + s.axis_y.font_indent; break;
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}
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}
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var sz = s.axis_y.title.get_size(context);
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// 4.5. Draw Axis title
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if (s.axis_y.title.text != "") {
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var scr_y = plot_y_max - (plot_y_max - plot_y_min) * (s.place.zoom_y_min + s.place.zoom_y_max) / 2.0;
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switch (s.axis_y.position) {
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case Axis.Position.LOW:
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var scr_x = cur_x_min + s.axis_y.font_indent + sz.width;
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context.move_to(scr_x, scr_y + sz.height / 2.0);
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break;
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case Axis.Position.HIGH:
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var scr_x = cur_x_max - s.axis_y.font_indent;
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context.move_to(scr_x, scr_y + sz.height / 2.0);
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break;
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}
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set_source_rgba(s.axis_y.color);
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if (joint_y) set_source_rgba(joint_axis_color);
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s.axis_y.title.show(context);
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}
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draw_vertical_records (s, step, max_rec_width, y_min);
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context.stroke ();
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double tmp1 = 0, tmp2 = 0, tmp3 = 0, tmp4 = 0;
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s.join_relative_y_axes (this, si, false, ref tmp1, ref tmp2, ref tmp3, ref tmp4, ref nskip);
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if (nskip != 0) {--nskip; continue;}
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switch (s.axis_y.position) {
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case Axis.Position.LOW:
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cur_x_min += max_rec_width + s.axis_y.font_indent
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+ (s.axis_y.title.text == "" ? 0 : sz.width + s.axis_y.font_indent); break;
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case Axis.Position.HIGH:
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cur_x_max -= max_rec_width + s.axis_y.font_indent
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+ (s.axis_y.title.text == "" ? 0 : sz.width + s.axis_y.font_indent); break;
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}
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}
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for (var si = series.length - 1, nskip = 0; si >=0; --si)
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series[si].draw_vertical_axis (this, si, ref nskip);
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}
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protected virtual void draw_plot_area_border () {
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126
src/Series.vala
126
src/Series.vala
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@ -340,5 +340,131 @@ namespace CairoChart {
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break;
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}
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}
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protected virtual void draw_vertical_records (Chart chart, Series s, Float128 step, double max_rec_width, Float128 y_min) {
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// 5. Draw records, update cur_{x,y}_{min,max}.
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var context = chart.context;
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var joint_y = chart.joint_y;
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for (Float128 y = y_min, y_max = s.axis_y.zoom_max; chart.math.point_belong (y, y_min, y_max); y += step) {
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if (joint_y) chart.set_source_rgba(chart.joint_axis_color);
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else chart.set_source_rgba(s.axis_y.color);
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var text = s.axis_y.format.printf((LongDouble)y);
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var scr_y = chart.get_scr_y (s, y);
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var text_t = new Text(text, s.axis_y.font_style, s.axis_y.color);
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var text_sz = text_t.get_size(context);
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var sz = s.axis_y.title.get_size(context);
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switch (s.axis_y.position) {
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case Axis.Position.LOW:
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context.move_to (chart.cur_x_min + max_rec_width - text_sz.width + s.axis_y.font_indent
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+ (s.axis_y.title.text == "" ? 0 : sz.width + s.axis_y.font_indent),
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chart.compact_rec_y_pos (s, y, text_t));
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text_t.show(context);
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// 6. Draw grid lines to the s.place.zoom_x_min.
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var line_style = s.grid.line_style;
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if (joint_y) line_style.color = Color(0, 0, 0, 0.5);
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line_style.set(chart);
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double x = chart.cur_x_min + max_rec_width + s.axis_y.font_indent + (s.axis_y.title.text == "" ? 0 : sz.width + s.axis_y.font_indent);
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context.move_to (x, scr_y);
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if (joint_y)
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context.line_to (chart.plot_x_max, scr_y);
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else
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context.line_to (double.max (x, chart.plot_x_min + (chart.plot_x_max - chart.plot_x_min) * s.place.zoom_x_max), scr_y);
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break;
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case Axis.Position.HIGH:
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context.move_to (chart.cur_x_max - text_sz.width - s.axis_y.font_indent
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- (s.axis_y.title.text == "" ? 0 : sz.width + s.axis_y.font_indent),
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chart.compact_rec_y_pos (s, y, text_t));
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text_t.show(context);
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// 6. Draw grid lines to the s.place.zoom_x_max.
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var line_style = s.grid.line_style;
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if (joint_y) line_style.color = Color(0, 0, 0, 0.5);
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line_style.set(chart);
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double x = chart.cur_x_max - max_rec_width - s.axis_y.font_indent - (s.axis_y.title.text == "" ? 0 : sz.width + s.axis_y.font_indent);
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context.move_to (x, scr_y);
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if (joint_y)
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context.line_to (chart.plot_x_min, scr_y);
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else
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context.line_to (double.min (x, chart.plot_x_min + (chart.plot_x_max - chart.plot_x_min) * s.place.zoom_x_min), scr_y);
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break;
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}
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}
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}
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public virtual void draw_vertical_axis (Chart chart, int si, ref int nskip) {
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var s = chart.series[si];
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if (!s.zoom_show) return;
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if (chart.joint_y && si != chart.zoom_first_show) 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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s.axis_y.calc_rec_sizes (chart, 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.plot_y_max - chart.plot_y_min) * (s.place.zoom_y_max - s.place.zoom_y_min) / max_rec_height);
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// 3. Calculate grid step.
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Float128 step = chart.math.calc_round_step ((s.axis_y.zoom_max - s.axis_y.zoom_min) / max_nrecs);
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if (step > s.axis_y.zoom_max - s.axis_y.zoom_min)
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step = s.axis_y.zoom_max - s.axis_y.zoom_min;
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// 4. Calculate y_min (s.axis_y.zoom_min / step, round, multiply on step, add step if < s.axis_y.zoom_min).
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Float128 y_min = 0.0;
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if (step >= 1) {
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int64 y_min_nsteps = (int64) (s.axis_y.zoom_min / 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)s.axis_y.zoom_min;
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int64 y_min_nsteps = (int64) ((s.axis_y.zoom_min - 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 < s.axis_y.zoom_min) y_min += step;
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// 4.2. Cursor values for joint Y axis
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if (chart.joint_y && chart.cursor_style.orientation == Cursor.Orientation.HORIZONTAL && chart.cursors_crossings.length != 0) {
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switch (s.axis_y.position) {
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case Axis.Position.LOW: chart.cur_x_min += max_rec_width + s.axis_y.font_indent; break;
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case Axis.Position.HIGH: chart.cur_x_max -= max_rec_width + s.axis_y.font_indent; break;
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}
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}
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var sz = s.axis_y.title.get_size(chart.context);
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// 4.5. Draw Axis title
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if (s.axis_y.title.text != "") {
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var scr_y = chart.plot_y_max - (chart.plot_y_max - chart.plot_y_min) * (s.place.zoom_y_min + s.place.zoom_y_max) / 2.0;
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switch (s.axis_y.position) {
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case Axis.Position.LOW:
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var scr_x = chart.cur_x_min + s.axis_y.font_indent + sz.width;
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chart.context.move_to(scr_x, scr_y + sz.height / 2.0);
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break;
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case Axis.Position.HIGH:
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var scr_x = chart.cur_x_max - s.axis_y.font_indent;
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chart.context.move_to(scr_x, scr_y + sz.height / 2.0);
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break;
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}
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chart.set_source_rgba(s.axis_y.color);
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if (chart.joint_y) chart.set_source_rgba(chart.joint_axis_color);
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s.axis_y.title.show(chart.context);
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}
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draw_vertical_records (chart, s, step, max_rec_width, y_min);
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chart.context.stroke ();
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double tmp1 = 0, tmp2 = 0, tmp3 = 0, tmp4 = 0;
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s.join_relative_y_axes (chart, 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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switch (s.axis_y.position) {
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case Axis.Position.LOW:
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chart.cur_x_min += max_rec_width + s.axis_y.font_indent
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+ (s.axis_y.title.text == "" ? 0 : sz.width + s.axis_y.font_indent); break;
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case Axis.Position.HIGH:
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chart.cur_x_max -= max_rec_width + s.axis_y.font_indent
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+ (s.axis_y.title.text == "" ? 0 : sz.width + s.axis_y.font_indent); break;
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}
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}
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}
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}
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