//

// Created by Alan Freitas on 2020-07-05.

//

#include <algorithm>

#include <cmath>

#include <iomanip>

#include <memory>

#include <sstream>

#include <matplot/core/axes_object.h>

#include <matplot/core/axes_type.h>

#include <matplot/core/figure_type.h>

#include <matplot/util/colors.h>

#include <matplot/util/common.h>

#include <matplot/util/concepts.h>

#include <matplot/util/contourc.h>

#include <matplot/util/geodata.h>

#include <matplot/axes_objects/bars.h>

#include <matplot/axes_objects/box_chart.h>

#include <matplot/axes_objects/circles.h>

#include <matplot/axes_objects/contours.h>

#include <matplot/axes_objects/error_bar.h>

#include <matplot/axes_objects/filled_area.h>

#include <matplot/axes_objects/function_line.h>

#include <matplot/axes_objects/labels.h>

#include <matplot/axes_objects/line.h>

#include <matplot/axes_objects/matrix.h>

#include <matplot/axes_objects/network.h>

#include <matplot/axes_objects/parallel_lines.h>

#include <matplot/axes_objects/stair.h>

#include <matplot/axes_objects/string_function.h>

#include <matplot/axes_objects/surface.h>

#include <matplot/axes_objects/vectors.h>

#include <matplot/freestanding/histcounts.h>

namespace matplot {

void axes_type::draw() { parent_->draw(); }

void axes_type::touch() { parent_->touch(); }

void axes_type::emplace_object(axes_object_handle obj) {

if (next_plot_replace_) {

children_.clear();

colororder_index_ = 0;

}

children_.push_back(obj);

touch();

}

void axes_type::run_title_command() {

include_comment("Axes title");

if (title_visible_ && !title_.empty()) {

std::string cmd;

cmd += "set title \"";

if (title_enhanced_ && iequals(title_font_weight_, "bold")) {

cmd += "{/:Bold ";

}

if (title_enhanced_ && iequals(title_font_weight_, "italic")) {

cmd += "{/:Italic ";

}

cmd += escape(title());

if (title_enhanced_ && iequals(title_font_weight_, "bold")) {

cmd += "}";

}

if (title_enhanced_ && iequals(title_font_weight_, "italic")) {

cmd += "}";

}

if (parent_->backend_->supports_fonts()) {

cmd += "\" font \"" + escape(font()) + "," +

std::to_string(unsigned(font_size() *

title_font_size_multiplier_)) +

"\"";

cmd += " textcolor '" + to_string(title_color_) + "'";

}

if (title_enhanced_) {

cmd += " enhanced";

} else {

cmd += " noenhanced";

}

run_command(cmd);

} else {

run_command("unset title");

}

}

void axes_type::run_colormap_command() {

bool any_obj_needs_colormap = false;

for (const auto &child : children_) {

if (child->requires_colormap()) {

any_obj_needs_colormap = true;

break;

}

}

if (any_obj_needs_colormap && !colormap_.empty() &&

!children_.empty()) {

std::stringstream ss;

// limit the number of colors in the palette

// this is useful for contour plots

if (max_colors_) {

ss << " set palette maxcolors " << max_colors_ << "\n";

}

ss << " set palette model RGB\n";

ss << " set palette defined (\\\n";

if (max_colors_ == 0) {

// put all colormap colors in the palette

if (colormap_.size() == 1) {

colormap_.emplace_back(colormap_.front());

}

for (size_t i = 0; i < colormap_.size(); ++i) {

if (colormap_[i].size() == 4) {

std::array<double, 4> c = to_array<4>(colormap_[i]);

std::array<float, 4> c2;

std::copy(c.begin(), c.end(), c2.begin());

ss << " " << i << " \"" << to_string(c2) << "\"";

} else {

ss << " " << i << " " << colormap_[i][0] << " "

<< colormap_[i][1] << " " << colormap_[i][2];

}

if (i != colormap_.size() - 1) {

ss << ",\\\n";

} else {

ss << ")\n";

}

}

} else {

// if we limit the number of colors, the new colors

// are the max_color appropriate interpolations in

// the original colormap

for (size_t i = 0; i < max_colors_; ++i) {

color_array c =

colormap_interpolation(static_cast<double>(i), 0., max_colors_ - 1.);

ss << " " << i << " " << c[0 + 1] << " " << c[1 + 1]

<< " " << c[2 + 1];

if (i != max_colors_ - 1 || max_colors_ == 1) {

ss << ",\\\n";

} else {

ss << ")\n";

}

}

// we can't have just one color, at least in some versions

// of gnuplot we can't

if (max_colors_ == 1) {

color_array c =

colormap_interpolation(0, 0., max_colors_ - 1.);

ss << " " << 1 << " " << c[0 + 1] << " " << c[1 + 1]

<< " " << c[2 + 1] << ")\n";

}

}

run_command(ss.str());

}

}

std::tuple<double, double, double, double, double, double>

axes_type::calculate_margins() {

// There are conditions on which the xlim are smaller than requested

// to make room for other elements

double width_multiplier = is_3d() && !is_3d_map() ? 0.72 : 1.;

double height_multiplier = is_3d() && !is_3d_map() ? 0.72 : 1.;

double x = x_origin();

double y = y_origin();

// if parent has a title

if (!parent_->title().empty()) {

// open room for the title

double room_needed = 0.2;

double this_axes_contribution = room_needed * height();

height_multiplier -= this_axes_contribution;

// the further from y=0, the larger the shift

y -= 1.5 * y * this_axes_contribution;

}

double rmargin_multiplier = (1. - width_multiplier) / 2.;

double lmargin_multiplier = (1. - width_multiplier) / 2.;

double tmargin_multiplier = (1. - height_multiplier) / 2.;

double bmargin_multiplier = (1. - height_multiplier) / 2.;

const auto bg_width = width_multiplier * width();

const auto bg_height = height_multiplier * height();

// We increase the margins for colorbar

double colorbar_lmargin = 0.;

double colorbar_rmargin = 0.;

double colorbar_bmargin = 0.;

double colorbar_tmargin = 0.;

constexpr double extra_for_ticks = 0.05;

if (cb_axis_.visible() && !cb_inside_) {

// identify if colorbar is north/south/east/west

auto [cbx, cby, cbw, cbh] = cb_position_;

bool automatic_position = cbw == cbh;

if (automatic_position) {

if (cb_vertical_) {

colorbar_rmargin = 0.04;

} else {

colorbar_bmargin = 0.1;

}

} else if (cbw > cbh) {

// north/south

double south_margin = cby + cbh;

double north_margin = 1. - cby;

if (south_margin <= north_margin) {

// south

colorbar_bmargin = south_margin + extra_for_ticks;

} else {

// north

colorbar_tmargin = north_margin + extra_for_ticks;

}

} else {

// west/east

double east_margin = cbx + cbw;

double west_margin = 1. - cbx;

if (east_margin <= west_margin) {

// east

colorbar_rmargin = east_margin + extra_for_ticks;

} else {

// west

colorbar_lmargin = west_margin + extra_for_ticks;

}

}

}

const double lmargin =

x + width() * lmargin_multiplier + colorbar_lmargin;

const double rmargin =

x + width() - width() * rmargin_multiplier - colorbar_rmargin;

const double bmargin =

y + height() * bmargin_multiplier + colorbar_bmargin;

const double tmargin =

y + height() - height() * tmargin_multiplier - colorbar_tmargin;

return std::make_tuple(bg_width, bg_height,lmargin,rmargin,bmargin,tmargin);

}

void axes_type::run_position_margin_command() {

include_comment("Axes position");

run_command("set origin " + std::to_string(x_origin()) + "," +

std::to_string(y_origin()));

auto [bg_width, bg_height, lmargin, rmargin, bmargin, tmargin] =

calculate_margins();

run_command("set size " + num2str(bg_width) + "," + num2str(bg_height));

run_command("set lmargin at screen " + num2str(lmargin));

run_command("set rmargin at screen " + num2str(rmargin));

run_command("set bmargin at screen " + num2str(bmargin));

run_command("set tmargin at screen " + num2str(tmargin));

if (!axes_aspect_ratio_auto_) {

if (is_3d()) {

run_command("set view equal xyz");

} else {

run_command("set size ratio " +

std::to_string(axes_aspect_ratio_));

}

}

}

void axes_type::run_grid_command() {

// if the user didn't explicitly set the grid, turn on the grid

// by default in logscale

if (!x_user_grid_) {

x_grid_ = x_axis().scale() == axis_type::axis_scale::log || is_3d();

x_minor_grid_ = x_axis().scale() == axis_type::axis_scale::log;

}

if (!y_user_grid_) {

y_grid_ = y_axis().scale() == axis_type::axis_scale::log || is_3d();

y_minor_grid_ = y_axis().scale() == axis_type::axis_scale::log;

}

if (!z_user_grid_) {

z_grid_ = z_axis().scale() == axis_type::axis_scale::log || is_3d();

z_minor_grid_ = z_axis().scale() == axis_type::axis_scale::log;

}

if (!r_user_grid_) {

r_grid_ = r_axis().scale() == axis_type::axis_scale::log || is_polar();

r_minor_grid_ = r_axis().scale() == axis_type::axis_scale::log;

}

// set grid xtics ytics mxtics mytics layerdefault linecolor 'blue'

// linetype 1 linewidth 2, linecolor 'red'

if (x_grid_ || x_minor_grid_ || y_grid_ || y_minor_grid_ || z_grid_ ||

z_minor_grid_ || r_grid_ || r_minor_grid_) {

include_comment("Create grid");

std::string cmd = "set grid";

if (x_grid_) {

cmd += " xtics";

}

if (x_minor_grid_) {

cmd += " mxtics";

}

if (y_grid_) {

cmd += " ytics";

}

if (y_minor_grid_) {

cmd += " mytics";

}

if (z_grid_) {

cmd += " ztics";

}

if (z_minor_grid_) {

cmd += " mztics";

}

if (r_grid_) {

cmd += " polar";

}

if (r_minor_grid_) {

cmd += " mrtics";

}

cmd += " vertical";

if (grid_front_) {

cmd += " front";

}

cmd += grid_line_style_.plot_string(

line_spec::style_to_plot::plot_line_only, false);

if (x_minor_grid_ || y_minor_grid_ || z_minor_grid_) {

cmd += ",";

if (grid_front_) {

cmd += " front ";

}

cmd += minor_grid_line_style_.plot_string(

line_spec::style_to_plot::plot_line_only, false);

}

run_command(cmd);

}

}

void axes_type::run_box_command() {

include_comment("Axes box");

if (!visible_) {

run_command("unset border");

run_command("unset xtics");

run_command("unset ytics");

run_command("unset ztics");

return;

}

/* Border types for box

1 bottom bottom left front

2 left bottom left back

4 top bottom right front

8 right bottom right back

16 no effect left vertical

32 no effect back vertical

64 no effect right vertical

128 no effect front vertical

256 no effect top left back

512 no effect top right back

1024 no effect top left front

2048 no effect top right front

*/

if (!box_ || is_polar()) {

if (is_3d()) {

// create borders

// bottom left front 1

// bottom right front 4

// left vertical 16

run_command("set border 21 linecolor \"" +

to_string(x_axis().color()) + "\" linewidth " +

num2str(line_width()));

} else if (is_2d()) {

// create left (2) and bottom (1)

unsigned border = 0;

if (x_axis().visible()) {

border += 1;

}

if (y_axis().visible()) {

border += 2;

}

run_command("set border " + num2str(border) + " linecolor \"" +

to_string(x_axis().color()) + "\" linewidth " +

num2str(line_width()));

} else {

run_command("unset border");

}

} else {

// if (box_)

if (is_3d()) {

if (box_full_) {

run_command("set border 4095 linecolor \"" +

to_string(box_color_) + "\" linewidth " +

num2str(line_width()));

} else {

// create borders

// bottom left front 1

// bottom left back 2

// bottom right front 4

// bottom right back 8

// left vertical 16

// back vertical 32

// right vertical 64

// top left back 256

// top right back 512

run_command("set border 895 linecolor \"" +

to_string(box_color_) + "\" linewidth " +

num2str(line_width()));

}

} else {

// create all borders (bottom / left / top / right) in black

run_command("set border 15 linecolor \"" +

to_string(box_color_) + "\" linewidth " +

num2str(line_width()));

}

}

}

void axes_type::run_axes_command() {

// plot tics

// http://www.gnuplot.info/docs_4.2/node182.html

if (is_polar()) {

run_command("set polar");

}

auto set_or_unset_axis = [this](class axis_type &ax, std::string axis_name,

bool minor_ticks = false) {

// cb is the only axis we don't unset if tics are empty

if (ax.visible() && !ax.tick_values().empty()) {

if (ax.geographic()) {

run_command("set " + axis_name + "tics geographic");

}

if (ax.on_axis()) {

run_command("set " + axis_name + "tics axis");

}

run_command("set format " + axis_name + " \"" +

escape(ax.tick_label_format()) + "\"");

std::string tics_str = "set " + axis_name +

"tics textcolor \"" +

to_string(ax.color());

if (parent_->backend_->supports_fonts()) {

tics_str += "\" font \"" + font() + "," +

num2str(unsigned(font_size())) + "\"";

}

tics_str +=

" nomirror in scale " + num2str(ax.tick_length()) + " ";

run_command(tics_str);

if (ax.tick_values_manual() || ax.tick_values().empty()) {

run_command("set " + axis_name + "tics" +

ax.tick_values_string(minor_ticks) +

ax.tick_rotate_string());

} else {

if (ax.tickangle() != 0.) {

run_command("set " + axis_name + "tics" +

ax.tick_rotate_string());

}

if (minor_ticks) {

run_command("set m" + axis_name + "tics 2");

}

}

} else {

if (axis_name == "r") {

// Hiding the r-axis works differently.

// We can't completely unset the tics or the grid does not

// appear properly

run_command("unset " + axis_name + "axis");

run_command("set " + axis_name + "tics scale 0");

} else if (axis_name == "cb") {

// the colorbar / colorbox has a special command to unset it

// if only ticks are empty we still want to show the box

if (!ax.visible()) {

run_command("unset colorbox");

}

if (ax.tick_values().empty()) {

run_command("unset cbtics");

}

} else {

run_command("unset " + axis_name + "tics");

}

}

const bool zero_axis_is_possible =

axis_name != "r" && axis_name != "t" && axis_name != "cb";

if (zero_axis_is_possible) {

if (ax.zero_axis()) {

run_command("set " + axis_name + "zeroaxis linestyle -1");

} else {

run_command("unset " + axis_name + "zeroaxis");

}

}

};

if (!visible_) {

run_command("unset xtics");

run_command("unset ytics");

run_command("unset x2tics");

run_command("unset y2tics");

if (is_3d()) {

run_command("unset ztics");

}

if (is_polar()) {

run_command("unset raxis");

run_command("set rtics scale 0");

run_command("unset ttics");

}

} else {

set_or_unset_axis(x_axis_, "x", x_minor_grid_);

set_or_unset_axis(x2_axis_, "x2", x_minor_grid_);

set_or_unset_axis(y_axis_, "y", y_minor_grid_);

set_or_unset_axis(y2_axis_, "y2", y_minor_grid_);

const bool is_map = azimuth_ == 0 && elevation_ == 90;

if (is_3d() && !is_map) {

set_or_unset_axis(z_axis_, "z", z_minor_grid_);

}

if (is_polar()) {

set_or_unset_axis(r_axis_, "r", r_minor_grid_);

set_or_unset_axis(t_axis_, "t", t_minor_grid_);

}

if (cb_axis_.visible()) {

std::stringstream ss;

ss << "set colorbox";

if (!cb_axis_.reverse()) {

ss << " noinvert";

} else {

ss << " invert";

}

if (cb_vertical_) {

ss << " vertical";

} else {

ss << " horizontal";

}

if (cb_position_[2] == 0. && cb_position_[3] == 0.) {

ss << " default";

} else {

auto [x, y, w, h] = position_;

ss << " user";

ss << " origin " << x + cb_position_[0] * w << ","

<< y + cb_position_[1] * h;

ss << " size " << cb_position_[2] * w << ","

<< cb_position_[3] * h;

}

run_command(ss.str());

}

set_or_unset_axis(cb_axis_, "cb", false);

/*

* if (color_box_) {

run_command("set colorbox");

if (color_box_log_scale_) {

run_command("set logscale cb");

}

} else {

run_command("unset colorbox");

if (color_box_log_scale_) {

run_command("unset logscale cb");

}

}

*/

}

include_comment("Axes ranges");

run_command("set xrange " + x_axis().range_string());

run_command("set yrange " + y_axis().range_string());

run_command("set y2range " + y2_axis().range_string());

if (is_3d()) {

run_command("set zrange " + z_axis().range_string());

}

if (is_polar() && r_axis().limits_mode_manual()) {

run_command("set rrange " + r_axis().range_string());

}

if (cb_axis_.visible()) {

run_command("set cbrange " + cb_axis_.range_string());

}

include_comment("Axes scale");

if (x_axis().scale() == axis_type::axis_scale::log) {

run_command("set logscale x");

}

if (y_axis().scale() == axis_type::axis_scale::log) {

run_command("set logscale y");

}

if (is_3d()) {

if (z_axis().scale() == axis_type::axis_scale::log) {

run_command("set logscale z");

}

}

if (is_3d()) {

include_comment("Axes view");

run_command("set xyplane 0");

// gnuplot azimuths are bounded [0:360]

float gnuplot_azimuth_ = azimuth_ + 360;

while (gnuplot_azimuth_ < 0) {

gnuplot_azimuth_ += 360;

}

while (gnuplot_azimuth_ > 360) {

gnuplot_azimuth_ -= 360;

}

// gnuplot elevation is bounded [0,180]

// our elevation is bounded [-90,+90]

// matlab -90 = gnuplot 180

// matlab -45 = gnuplot 135

// matlab 0 = gnuplot 90

// matlab +45 = gnuplot 45

// matlab +90 = gnuplot 0

float gnuplot_elevation_ = 90 - elevation_;

while (gnuplot_elevation_ < 0) {

gnuplot_elevation_ += 180;

}

while (gnuplot_elevation_ > 180) {

gnuplot_elevation_ -= 180;

}

run_command("set view " + num2str(gnuplot_elevation_) + "," +

num2str(gnuplot_azimuth_));

}

}

void axes_type::run_labels_command() {

include_comment("Axes labels");

// set xlabel {"<label>"} {offset <offset>} {font

// "<font>{,<size>}"}

// {{textcolor | tc} {lt <line_type> | default}}

// {{no}enhanced} {rotate by <degrees>}

if (!x_axis_.label().empty()) {

std::string cmd = "set xlabel" + x_axis_.label_string();

run_command(cmd);

}

if (!y_axis_.label().empty()) {

std::string cmd = "set ylabel" + y_axis_.label_string();

run_command(cmd);

}

if (!y2_axis_.label().empty()) {

std::string cmd = "set y2label" + y2_axis_.label_string();

run_command(cmd);

}

const bool is_map = azimuth_ == 0 && elevation_ == 90;

if (is_3d() && !z_axis_.label().empty() && !is_map) {

std::string cmd =

"set zlabel" + z_axis_.label_string() + " rotate parallel";

run_command(cmd);

}

if (!cb_axis_.label().empty()) {

std::string cmd =

"set cblabel" + cb_axis_.label_string() + " rotate parallel";

run_command(cmd);

}

}

void axes_type::run_legend_command() {

// set key {on|off} {default}

// {{inside | outside} | {lmargin | rmargin | tmargin | bmargin}

// | {at <position>}}

// {left | right | center} {top | bottom | center}

// {vertical | horizontal} {Left | Right}

// {{no}reverse} {{no}invert}

// {samplen <sample_length>} {spacing <vertical_spacing>}

// {width <width_increment>}

// {height <height_increment>}

// {{no}autotitle {columnheader}}

// {title "<text>"} {{no}enhanced}

// {{no}box { {linestyle | ls <line_style>}

// | {linetype | lt <line_type>}

// {linewidth | lw <line_width>}}}

include_comment("Axes legend");

// Gnuplot version needs to be 5.2.6+ for keyentry

bool ok = true;

if (parent_->backend_->consumes_gnuplot_commands()) {

std::pair<int, int> v = backend::gnuplot::gnuplot_version();

if (v.first < 5 || v.second < 2) {

ok = false;

}

}

if (legend_ == nullptr || !legend_->visible() || !ok) {

run_command("set key off");

} else {

bool legends_to_plot = !legend_->empty();

if (!legends_to_plot) {

for (const auto &child : children_) {

if (!child->display_name().empty()) {

legends_to_plot = true;

break;

}

}

}

if (!legends_to_plot) {

run_command("set key off");

} else {

std::string cmd = "set key on";

if (parent_->backend_->supports_fonts()) {

cmd += " font \"" + legend_->font_name() + "," +

num2str(legend_->font_size()) +

"\" textcolor rgb '" +

to_string(legend_->text_color()) + "'";

}

// position

cmd += legend_->inside() ? " inside" : " outside";

if (legend_->manual_position()) {

cmd += " at " + num2str(legend_->position()[0]) + "," +

num2str(legend_->position()[1]);

}

switch (legend_->horizontal_location()) {

case legend::horizontal_alignment::left:

cmd += " left";

break;

case legend::horizontal_alignment::right:

cmd += " right";

break;

case legend::horizontal_alignment::center:

cmd += " center";

break;

}

switch (legend_->vertical_location()) {

case legend::vertical_alignment::top:

cmd += " top";

break;

case legend::vertical_alignment::bottom:

cmd += " bottom";

break;

case legend::vertical_alignment::center:

cmd += " center";

break;

}

cmd += legend_->vertical() ? " vertical" : " horizontal";

// text aligned to the left

cmd += " Left";

cmd += " opaque";

cmd +=

legend_->label_after_sample() ? " reverse" : " noreverse";

cmd += legend_->invert() ? " invert" : " noinvert";

// increase the width to make labels fit

cmd += " width 1";

// forbid automatic labels

// we are going to generate them explicitly for our xlim objects

cmd += " noautotitle";

// box

if (!legend_->title().empty()) {

cmd += " title \"";

if (iequals(legend_->font_weight(), "bold")) {

cmd += "{/:Bold ";

}

cmd += escape(legend_->title());

if (iequals(legend_->font_weight(), "bold")) {

cmd += "}";

}

cmd += "\"";

if (parent_->backend_->supports_fonts()) {

cmd += " font \"" + escape(legend_->font_name()) + "," +

num2str(unsigned(legend_->font_size())) + "\"";

cmd += " textcolor rgb \"" +

to_string(legend_->text_color()) + "\"";

}

}

if (legend_->box() && legend_->box_line().has_line()) {

cmd += " box";

cmd += legend_->box_line().plot_string(

line_spec::style_to_plot::plot_line_only, false);

} else {

cmd += " nobox";

}

if (legend_->num_columns() != 0) {

size_t n_strings = legend_->size();

for (size_t i = 0; i < children_.size(); ++i) {

n_strings += !children_[i]->display_name().empty();

}

cmd += " maxrows " +

num2str(ceil(static_cast<double>(n_strings) /

legend_->num_columns()));

}

if (legend_->num_rows() != 0) {

cmd += " maxrows " + num2str(legend_->num_rows());

}

run_command(cmd);

}

}

}

void axes_type::run_background_command() {

const bool saving_to_file = !parent_->backend_->output().empty();

const bool using_default_color =

color_ == std::array<float, 4>{0, 1.0, 1.0, 1.0};

if (saving_to_file && using_default_color) {

return;

}

include_comment("Axes background");

// plot background

if (visible_) {

// rectangle behind the graph

if (color_ != parent()->color()) {

if (is_2d() || is_3d_map()) {

run_command("set object 2 rectangle from graph 0,0 to "

"graph 1,1 behind fillcolor rgb \"" +

to_string(color()) +

"\" fillstyle solid 1.0 noborder");

} else if (is_3d()) {

auto v = backend::gnuplot::gnuplot_version();

const bool has_wall_option =

v.first > 5 || (v.first == 5 && v.second >= 5);

if (has_wall_option) {

run_command("set wall z0 fs transparent solid 0.5 "

"border -1 fc 'slategray'");

run_command("set wall x0 fs transparent solid 0.5 "

"border -1 fc 'slategray'");

run_command("set wall y1 fs transparent solid 0.5 "

"border -1 fc 'slategray'");

}

} else if (is_polar()) {

double m = children_[0]->xmax();

run_command("set object 2 ellipse at first 0,0 size " +

num2str(m * 2) + "," + num2str(m * 2) +

" angle 0 behind fillcolor rgb \"" +

to_string(color()) +

"\" fillstyle solid 1.0 noborder");

}

}

// rectangle behind the whole area allocated for the xlim

// we don't use it anymore

/*

* if (false && color_ != parent()->color()) {

* run_command("set object 2 rectangle from screen " +

* std::to_string(x_origin()) + "," + std::to_string(y_origin()) + "

* to screen " + std::to_string(x_origin() + width()) + "," +

* std::to_string(y_origin() + height()) + " behind

* fillcolor rgb \"" + to_string(color_outside_) + "\" fillstyle

* solid 1.0 noborder");

* }

*/

}

}

void axes_type::run_empty_plot_command() {

include_comment("Empty xlim");

if (x_axis().limits_mode_auto()) {

run_command("set yrange [0:1]");

}

if (y_axis().limits_mode_auto()) {

run_command("set yrange [0:1]");

}

run_command("set key off");

if (y_axis().limits_mode_auto() ||

!std::isfinite(y_axis().limits()[1])) {

run_command("plot 2 with lines");

} else {

run_command("plot " + std::to_string(y_axis().limits_[1] + 1) +

" with lines");

}

}

void axes_type::run_plot_objects_command() {

include_comment("Axes objects");

// Plot empty xlim if there are no objects

if (children_.empty()) {

run_empty_plot_command();

return;

}

// Set variable commands

std::string set_variables_command;

for (const auto &child : children_) {

set_variables_command += child->set_variables_string();

}

run_command(set_variables_command);

// Plot command

std::string plot_command = !is_3d() ? "plot " : "splot ";

// Plot all children

bool first = true;

for (const auto &child : children_) {

if (!first) {

plot_command += ",\\\n ";

} else {

first = false;

}

plot_command += child->plot_string();

}

// Keyentry commands (legends for each child)

if (legend_ != nullptr && legend_->visible()) {

bool ok = true;

static bool msg_shown_once = false;

// Gnuplot version needs to be 5.2.6+ for keyentry

if (parent_->backend_->consumes_gnuplot_commands()) {

std::pair<int, int> v = backend::gnuplot::gnuplot_version();

if (v.first < 5 || v.second < 2) {

if (!msg_shown_once) {

std::cerr

<< "You need gnuplot 5.2.6+ to include legends"

<< std::endl;

msg_shown_once = true;

}

ok = false;

}

}

if (ok) {

auto legend_it = legend_->begin();

auto legend_end = legend_->end();

for (auto child_it = children_.begin();

child_it != children_.end(); ++child_it) {

const bool no_legend = legend_it == legend_end &&

(*child_it)->display_name().empty();

if (no_legend) {

continue;

}

const auto &child = *child_it;

if (!first) {

plot_command += ", ";

} else {

first = false;

}

// https://stackoverflow.com/a/60624922/2983585

// http://gnuplot.sourceforge.net/demo_svg_5.5/custom_key.html

plot_command += child->legend_string(legend_it, legend_end);

}

}

}

if (plot_command != "plot ") {

run_command(plot_command);

} else {

run_empty_plot_command();

}

// data commands

for (const auto &child : children_) {

run_command(child->data_string());

}

// unset variables command

std::string unset_variables_command;

for (const auto &child : children_) {

unset_variables_command += child->unset_variables_string();

}

run_command(unset_variables_command);

}

void axes_type::run_commands() {

run_colormap_command();

run_position_margin_command();

run_title_command();

run_box_command();

run_grid_command();

run_axes_command();

run_labels_command();

run_legend_command();

run_background_command();

run_plot_objects_command();

}

void axes_type::run_draw_commands() {

run_background_draw_commands();

run_grid_draw_commands();

run_box_draw_commands();

run_axes_draw_commands();

run_labels_draw_commands();

run_title_draw_commands();

run_legend_draw_commands();

run_plot_objects_draw_commands();

}

void axes_type::run_background_draw_commands() {

auto [w, h, lm, rm, bm, tm] = calculate_margins();

double view_width = parent_->backend_->width();

double x1 = lm * view_width;

double x2 = rm * view_width;

double view_height = parent_->backend_->height();

double y1 = bm * view_height;

double y2 = tm * view_height;

parent_->backend_->draw_rectangle(x1, x2, y1, y2, this->color_);

}

void axes_type::run_title_draw_commands() {

// This should draw the title on top of the axes

}

void axes_type::run_box_draw_commands() {

auto [w, h, lm, rm, bm, tm] = calculate_margins();

double view_width = parent_->backend_->width();

double x1 = lm * view_width;

double x2 = rm * view_width;

double view_height = parent_->backend_->height();

double y1 = bm * view_height;

double y2 = tm * view_height;

const std::array<float, 4> color = {0., 0., 0., 0.};

std::vector<double> box_xs = {x1, x2, x2, x1, x1};

std::vector<double> box_ys = {y1, y1, y2, y2, y1};

parent_->backend_->draw_path(box_xs, box_ys, color);

}

void axes_type::run_grid_draw_commands() {}

void axes_type::run_axes_draw_commands() {

auto [w, h, lm, rm, bm, tm] = calculate_margins();

double view_width = parent_->backend_->width();

double view_height = parent_->backend_->height();

// to draw the x axis we

// - normalize x values

// - keep y as absolute values

auto xlimits = xlim();

auto ylimits = ylim();