widget_painter.hpp

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#pragma once

 
#include <string>
 
#include <pulp/canvas/canvas.hpp>
#include <pulp/view/geometry.hpp>
 
namespace pulp::view {
 
class View;
 
// ── Shared control state ─────────────────────────────────────────────────────

struct ControlPaintState {
    Rect bounds{};             
    bool enabled = true;
    bool hovered = false;      
    bool pressed = false;      
    bool focused = false;      
};

struct RotaryPaintState : ControlPaintState {
    float position = 0.0f;
    float start_angle = 0.0f;
    float end_angle = 0.0f;
    double value = 0.0;
    double value_min = 0.0;
    double value_max = 1.0;
};

struct LinearPaintState : ControlPaintState {
    bool horizontal = true;
    float thumb_pos = 0.0f;
    float track_min = 0.0f;
    float track_max = 0.0f;
    float thumb_size = 0.0f;   
    double value = 0.0;
    double value_min = 0.0;
    double value_max = 1.0;
};

struct ButtonPaintState : ControlPaintState {
    bool toggled = false;
    std::string text;
    canvas::Color background{};
};

struct ComboBoxPaintState : ControlPaintState {
    bool popup_open = false;
    std::string text;
    Rect arrow_zone{};   
};

struct MenuBackgroundPaintState : ControlPaintState {};

struct MenuItemPaintState : ControlPaintState {
    std::string text;
    bool separator = false;
    bool highlighted = false;   
    bool ticked = false;
    bool has_submenu = false;
};

struct MenuHeaderPaintState : ControlPaintState {
    std::string text;
};

struct TextFieldPaintState : ControlPaintState {
    bool read_only = false;
    bool empty = true;             
};

struct CaretPaintState : ControlPaintState {
    float width = 1.0f;
};
 
// ── The delegate ─────────────────────────────────────────────────────────────

class WidgetPainter {
public:
    virtual ~WidgetPainter() = default;
 
    virtual bool paint_rotary(canvas::Canvas& canvas, const RotaryPaintState& state,
                              View& source) {
        (void)canvas; (void)state; (void)source;
        return false;
    }
 
    virtual bool paint_linear(canvas::Canvas& canvas, const LinearPaintState& state,
                              View& source) {
        (void)canvas; (void)state; (void)source;
        return false;
    }
 
    virtual bool paint_button_background(canvas::Canvas& canvas, const ButtonPaintState& state,
                                         View& source) {
        (void)canvas; (void)state; (void)source;
        return false;
    }
 
    virtual bool paint_button_text(canvas::Canvas& canvas, const ButtonPaintState& state,
                                   View& source) {
        (void)canvas; (void)state; (void)source;
        return false;
    }
 
    virtual bool paint_combo_box(canvas::Canvas& canvas, const ComboBoxPaintState& state,
                                 View& source) {
        (void)canvas; (void)state; (void)source;
        return false;
    }
 
    virtual bool paint_scroll_bar(canvas::Canvas& canvas, const LinearPaintState& state,
                                  View& source) {
        (void)canvas; (void)state; (void)source;
        return false;
    }
 
    virtual bool paint_menu_background(canvas::Canvas& canvas, const MenuBackgroundPaintState& state,
                                       View& source) {
        (void)canvas; (void)state; (void)source;
        return false;
    }
 
    virtual bool paint_menu_item(canvas::Canvas& canvas, const MenuItemPaintState& state,
                                 View& source) {
        (void)canvas; (void)state; (void)source;
        return false;
    }
 
    virtual bool paint_menu_section_header(canvas::Canvas& canvas, const MenuHeaderPaintState& state,
                                           View& source) {
        (void)canvas; (void)state; (void)source;
        return false;
    }
 
    virtual bool paint_text_field_background(canvas::Canvas& canvas,
                                             const TextFieldPaintState& state, View& source) {
        (void)canvas; (void)state; (void)source;
        return false;
    }
 
    virtual bool paint_text_field_outline(canvas::Canvas& canvas,
                                          const TextFieldPaintState& state, View& source) {
        (void)canvas; (void)state; (void)source;
        return false;
    }
 
    virtual bool paint_caret(canvas::Canvas& canvas, const CaretPaintState& state, View& source) {
        (void)canvas; (void)state; (void)source;
        return false;
    }
};
 
} // namespace pulp::view