raycaster/gui_gadgets.hpp

#pragma once
#include <SFML/Graphics/RectangleShape.hpp>
#include <SFML/Graphics/Font.hpp>
#include <SFML/Graphics/Text.hpp>
#include "lel.hpp"

namespace gui {
  struct Label {
    sf::Font &font;
    sf::Text text;
    lel::Cell& cell;

    Label(lel::Cell& cell, std::string label_text, sf::Font &font) :
      font(font),
      text(font, label_text),
      cell(cell)
    {
      auto bounds = text.getLocalBounds();
      auto text_cell = lel::center(bounds.size.x, bounds.size.y, cell);
      // this stupid / 2 is because SFML renders from baseline rather than from the claimed bounding box
      text.setPosition({float(text_cell.x), float(text_cell.y) - text_cell.h / 2});
    }

    void draw(sf::RenderWindow& window) {
      window.draw(text);
    }
  };

  struct Button {
    Label label;
    lel::Cell& cell;
    sf::RectangleShape shape;

    Button(lel::Cell& cell, std::string label_text, sf::Font &font) :
      label(cell, label_text, font),
      cell(cell)
    {
      shape.setPosition({float(cell.x + 3), float(cell.y + 3)});
      shape.setSize({float(cell.w - 6), float(cell.h - 6)});
      shape.setFillColor(ColorValue::DARK_MID);
      shape.setOutlineColor(ColorValue::MID);
      shape.setOutlineThickness(1);
    }

    void draw(sf::RenderWindow& window) {
      window.draw(shape);
      label.draw(window);
    }
  };

  struct Meter {
    sf::RectangleShape shape;
    lel::Cell& cell;

    Meter(lel::Cell& cell) :
      cell(cell)
    {
      shape.setPosition({float(cell.x + 3), float(cell.y + 3)});
      shape.setSize({float(cell.w - 6), float(cell.h - 6)});
      shape.setFillColor(ColorValue::DARK_MID);
      shape.setOutlineColor(ColorValue::MID);
      shape.setOutlineThickness(1);
    }

    void draw(sf::RenderWindow& window) {
      window.draw(shape);
    }

    void set_percent(float percent) {
      float level = percent * float(cell.w);
      // ZED: this 6 is a border to make it a thing
      shape.setSize({std::max(level, 0.0f), float(cell.h - 6)});
    }
  };
}