flipperzero-firmware/applications/gui/view_port_i.h

/**
 * @file view_port_i.h
 * GUI: internal ViewPort API
 */

#pragma once

#include "gui_i.h"
#include "view_port.h"

struct ViewPort {
    Gui* gui;
    bool is_enabled;
    ViewPortOrientation orientation;

    uint8_t width;
    uint8_t height;

    ViewPortDrawCallback draw_callback;
    void* draw_callback_context;

    ViewPortInputCallback input_callback;
    void* input_callback_context;
};

/** Set GUI reference.
 *
 * To be used by GUI, called upon view_port tree insert
 *
 * @param      view_port  ViewPort instance
 * @param      gui        gui instance pointer
 */
void view_port_gui_set(ViewPort* view_port, Gui* gui);

/** Process draw call. Calls draw callback.
 *
 * To be used by GUI, called on tree redraw.
 *
 * @param      view_port  ViewPort instance
 * @param      canvas     canvas to draw at
 */
void view_port_draw(ViewPort* view_port, Canvas* canvas);

/** Process input. Calls input callback.
 *
 * To be used by GUI, called on input dispatch.
 *
 * @param      view_port  ViewPort instance
 * @param      event      pointer to input event
 */
void view_port_input(ViewPort* view_port, InputEvent* event);