90 строки
2.7 KiB
C++
90 строки
2.7 KiB
C++
#include <iostream>
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#include <vector>
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#include <string>
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#include "svg.h"
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using namespace std;
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void svg_begin(double width, double height) {
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cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
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cout << "<svg "
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<< "width='" << width << "' "
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<< "height='" << height << "' "
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<< "viewBox='0 0 " << width << " " << height << "' "
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<< "xmlns='http://www.w3.org/2000/svg'>\n";
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}
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void svg_end() {
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cout << "</svg>\n";
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}
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void svg_text(double left, double baseline, string text) {
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cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>\n";
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}
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void svg_rect(double x, double y, double width, double height, string stroke = "black", string fill = "black") {
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cout << "<rect x='" << x << "' y='" << y << "' width='" << width << "' height='" << height
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<< "' stroke='" << stroke << "' fill='" << fill << "' />\n";
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}
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void draw_scale(double width, double height, double max_width, size_t step, double min, double max) {
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const double BLOCK_WIDTH = 10;
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const double SCALE_HEIGHT = 30;
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const double TEXT_OFFSET = 20;
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double scale_width = max_width;
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double scale_x = width - max_width;
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double scale_y = height - SCALE_HEIGHT;
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svg_rect(scale_x, scale_y, scale_width, 2, "black", "black");
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double step_size = scale_width / step;
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for (size_t i = 0; i <= step; i++) {
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double mark_x = scale_x + i * step_size;
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svg_rect(mark_x, scale_y, 2, 10, "black", "black");
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double value = min + (max - min) * i / step;
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string label = to_string(value);
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if (label.size() > 4) {
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label = label.substr(0, 4);
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}
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svg_text(mark_x - 10, scale_y + TEXT_OFFSET, label);
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}
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}
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void show_histogram_svg(const vector<size_t>& bins, size_t scale_step) {
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if (bins.empty()) {
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cerr << "Error: Empty bins vector\n";
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return;
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}
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const auto IMAGE_WIDTH = 400;
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const auto IMAGE_HEIGHT = 300;
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const auto TEXT_LEFT = 20;
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const auto TEXT_BASELINE = 20;
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const auto TEXT_WIDTH = 50;
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const auto BIN_HEIGHT = 30;
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const auto MAX_WIDTH = IMAGE_WIDTH - TEXT_WIDTH;
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svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
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double top = 0;
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size_t max_count = bins[0];
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for (size_t bin : bins) {
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if (max_count < bin) {
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max_count = bin;
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}
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}
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for (size_t bin : bins) {
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const double bin_width = MAX_WIDTH * (static_cast<double>(bin) / max_count);
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svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
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svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, "black", "red");
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top += BIN_HEIGHT;
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}
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draw_scale(IMAGE_WIDTH, IMAGE_HEIGHT, MAX_WIDTH, scale_step, 0, max_count);
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svg_end();
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}
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