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57 строки
1.8 KiB
C++
57 строки
1.8 KiB
C++
#include "svg.h"
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#include <algorithm>
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#include <string>
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using namespace std;
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namespace svg {
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void begin(ostream& out, double width, double height) {
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out << "<?xml version='1.0' encoding='UTF-8'?>\n";
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out << "<svg width='" << width << "' 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 end(ostream& out) {
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out << "</svg>\n";
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}
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void text(ostream& out, double left, double baseline, const string& text) {
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out << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>\n";
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}
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void rect(ostream& out, double x, double y, double width, double height,
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const string& stroke, const string& fill) {
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out << "<rect x='" << x << "' y='" << y << "' width='" << width
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<< "' height='" << height << "' stroke='" << stroke
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<< "' fill='" << fill << "' />\n";
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}
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void show_histogram_svg(ostream& out, const vector<size_t>& bins) {
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begin(out, IMAGE_WIDTH, IMAGE_HEIGHT);
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if (bins.empty()) {
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end(out);
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return;
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}
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size_t max_count = *max_element(bins.begin(), bins.end());
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double scale = (max_count > 0) ? (IMAGE_WIDTH - TEXT_WIDTH) / static_cast<double>(max_count) : 1.0;
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double top = 0;
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for (size_t bin : bins) {
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const double bin_width = bin * scale;
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text(out, TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
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string fill_color = (static_cast<int>(top / BIN_HEIGHT) % 2 == 0) ? "#aaffaa" : "#aaaaff";
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rect(out, TEXT_WIDTH, top, bin_width, BIN_HEIGHT, "black", fill_color);
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top += BIN_HEIGHT;
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}
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end(out);
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}
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}
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