button.hpp

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#pragma once
 
#include "lmgl/ui/ui_element.hpp"
#include "lmgl/ui/panel.hpp"
#include "lmgl/ui/text.hpp"
 
#include <functional>
#include <glm/glm.hpp>
#include <memory>
#include <string>
 
namespace lmgl {
 
namespace ui {

enum class ButtonState { Normal, Hovered, Pressed };

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

    ~Button() override = default;

    void set_label(const std::string &label);

    inline const std::string &get_label() const { return m_label; }

    inline void set_on_click(std::function<void()> callback) { m_on_click = callback; }

    void set_colors(const glm::vec4 &normal, const glm::vec4 &hovered, const glm::vec4 &pressed);

    void set_text_color(const glm::vec4 &color);

    inline std::shared_ptr<Text> get_text() { return m_text; }

    bool contains_point(float x, float y, float canvas_width, float canvas_height) const;

    bool handle_mouse_button(float x, float y, bool pressed, float canvas_width, float canvas_height);

    void handle_mouse_move(float x, float y, float canvas_width, float canvas_height);

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

    std::shared_ptr<Panel> m_panel;

    std::shared_ptr<Text> m_text;

    std::function<void()> m_on_click;

    ButtonState m_state{ButtonState::Normal};

    glm::vec4 m_color_normal{0.3f, 0.3f, 0.3f, 1.0f};
    glm::vec4 m_color_hovered{0.4f, 0.4f, 0.4f, 1.0f};
    glm::vec4 m_color_pressed{0.2f, 0.2f, 0.2f, 1.0f};

    glm::vec4 m_text_color{1.0f, 1.0f, 1.0f, 1.0f};
};
 
} // namespace ui
 
} // namespace lmgl