text.hpp

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#pragma once
 
#include "lmgl/renderer/shader.hpp"
#include "lmgl/renderer/vertex_array.hpp"
#include "lmgl/ui/font.hpp"
#include "lmgl/ui/ui_element.hpp"
 
#include <glm/glm.hpp>
#include <memory>
#include <string>
 
namespace lmgl {
 
namespace ui {

enum class TextAlign { Left, Center, Right };

class Text : public UIElement {
  public:
    Text(const std::string &text = "", const std::string &name = "Text");

    ~Text() override = default;

    void set_text(const std::string &text);

    inline const std::string &get_text() const { return m_text; }

    void set_font(std::shared_ptr<Font> font);

    inline std::shared_ptr<Font> get_font() const { return m_font; }

    inline void set_color(const glm::vec4 &color) { m_color = color; }

    inline const glm::vec4 &get_color() const { return m_color; }

    inline void set_alignment(TextAlign align) { m_alignment = align; }

    inline TextAlign get_alignment() const { return m_alignment; }

    void render(float canvas_width, float canvas_height, const glm::mat4 &projection) override;
 
  private:
    std::string m_text;

    std::shared_ptr<Font> m_font;

    glm::vec4 m_color{1.0f, 1.0f, 1.0f, 1.0f};

    TextAlign m_alignment{TextAlign::Left};

    static std::shared_ptr<renderer::Shader> s_shader;

    static std::shared_ptr<renderer::VertexArray> s_vao;

    static std::shared_ptr<renderer::VertexBuffer> s_vbo;

    static void initialize_resources();

    static bool s_initialized;

    void update_size();
};
 
} // namespace ui
 
} // namespace lmgl