Methods order changed according to usage probabilities.
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166
src/Axis.vala
166
src/Axis.vala
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@ -198,6 +198,24 @@ namespace CairoChart {
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return axis;
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}
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/**
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* Gets screen position by real ``Axis`` value.
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* @param axis_value real ``Axis`` value.
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*/
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public virtual double scr_pos (Float128 axis_value) {
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return is_x ? chart.plarea.x0 + chart.plarea.width * (place.zmin + (axis_value - range.zmin) / range.zrange * place.zrange)
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: chart.plarea.y0 + chart.plarea.height * (1 - (place.zmin + (axis_value - range.zmin) / range.zrange * place.zrange));
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}
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/**
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* Gets real ``Axis`` value by screen position.
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* @param scr_pos screen position.
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*/
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public virtual Float128 axis_val (double scr_pos) {
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return is_x ? range.zmin + ((scr_pos - chart.plarea.x0) / chart.plarea.width - place.zmin) * range.zrange / place.zrange
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: range.zmin + ((chart.plarea.y1 - scr_pos) / chart.plarea.height - place.zmin) * range.zrange / place.zrange;
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}
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/**
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* Prints date/time to strings with a current formats.
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* @param date returns formatted date string.
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@ -213,6 +231,16 @@ namespace CairoChart {
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time = dt.format(time_format) + dsec_str;
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}
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/**
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* Gets compact placement position on the screen.
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* @param axis_value real ``Axis`` 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_pos (Float128 axis_value, Text text) {
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return is_x ? scr_pos(axis_value) - text.width / 2 - text.width * (axis_value - (range.zmin + range.zmax) / 2) / range.zrange
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: scr_pos(axis_value) + text.height / 2 + text.height * (axis_value - (range.zmin + range.zmax) / 2) / range.zrange;
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}
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/**
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* Zooms out ``Axis``.
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*/
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@ -221,67 +249,6 @@ namespace CairoChart {
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place.zoom_out();
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}
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/**
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* Joins equal axes.
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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 (ref int nskip) {
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Axis axis = this;
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if (!ser.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, ser);
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if (si == -1) return;
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if (is_x)
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join_rel_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_rel_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 + font.hspacing;
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switch (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 (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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@ -395,31 +362,64 @@ namespace CairoChart {
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}
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/**
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* Gets compact placement position on the screen.
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* @param axis_value real ``Axis`` value.
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* @param text to place on the screen.
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* Joins equal axes.
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* @param nskip returns number of series to skip printing.
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*/
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public virtual double compact_rec_pos (Float128 axis_value, Text text) {
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return is_x ? scr_pos(axis_value) - text.width / 2 - text.width * (axis_value - (range.zmin + range.zmax) / 2) / range.zrange
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: scr_pos(axis_value) + text.height / 2 + text.height * (axis_value - (range.zmin + range.zmax) / 2) / range.zrange;
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}
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public virtual void join_axes (ref int nskip) {
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Axis axis = this;
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if (!ser.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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/**
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* Gets screen position by real ``Axis`` value.
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* @param axis_value real ``Axis`` value.
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*/
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public virtual double scr_pos (Float128 axis_value) {
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return is_x ? chart.plarea.x0 + chart.plarea.width * (place.zmin + (axis_value - range.zmin) / range.zrange * place.zrange)
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: chart.plarea.y0 + chart.plarea.height * (1 - (place.zmin + (axis_value - range.zmin) / range.zrange * place.zrange));
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}
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var si = Math.find_arr<Series>(chart.series, ser);
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if (si == -1) return;
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/**
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* Gets real ``Axis`` value by screen position.
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* @param scr_pos screen position.
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*/
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public virtual Float128 axis_val (double scr_pos) {
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return is_x ? range.zmin + ((scr_pos - chart.plarea.x0) / chart.plarea.width - place.zmin) * range.zrange / place.zrange
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: range.zmin + ((chart.plarea.y1 - scr_pos) / chart.plarea.height - place.zmin) * range.zrange / place.zrange;
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if (is_x)
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join_rel_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_rel_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 + font.hspacing;
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switch (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 (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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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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