unleashed-firmware/applications/gui/widget.h

#pragma once

#include <input/input.h>

typedef struct GUI GUI;
typedef struct Canvas Canvas;

typedef struct {
    void* gui;
    bool is_enabled;
    WidgetDrawCallback draw_callback;
    void* draw_callback_context;
    WidgetInputCallback input_callback;
    void* input_callback_context;
} Widget;

typedef void (*WidgetDrawCallback)(Canvas* canvas, void* context);
typedef void (*WidgetInputCallback)(InputEvent* event, void* context);

Widget* widget_alloc();
void widget_free(Widget* widget);

void widget_enabled_set(Widget* widget, bool enabled);
bool widget_is_enabled(Widget* widget);

void widget_draw_callback_set(Widget* widget, WidgetDrawCallback callback, void* context);
void widget_input_callback_set(Widget* widget, WidgetInputCallback callback, void* context);

// emit update signal
void widget_update(Widget* widget);