unleashed-firmware/applications/bad_usb/scenes/bad_usb_scene_error.c

#include "../bad_usb_app_i.h"

typedef enum {
    SubghzCustomEventErrorBack,
} BadUsbCustomEvent;

static void
    bad_usb_scene_error_event_callback(GuiButtonType result, InputType type, void* context) {
    furi_assert(context);
    BadUsbApp* app = context;

    if((result == GuiButtonTypeLeft) && (type == InputTypeShort)) {
        view_dispatcher_send_custom_event(app->view_dispatcher, SubghzCustomEventErrorBack);
    }
}

void bad_usb_scene_error_on_enter(void* context) {
    BadUsbApp* app = context;

    widget_add_icon_element(app->widget, 0, 0, &I_SDQuestion_35x43);

    widget_add_string_multiline_element(
        app->widget,
        81,
        4,
        AlignCenter,
        AlignTop,
        FontSecondary,
        "No SD card or\napp data found.\nThis app will not\nwork without\nrequired files.");

    widget_add_button_element(
        app->widget, GuiButtonTypeLeft, "Back", bad_usb_scene_error_event_callback, app);

    view_dispatcher_switch_to_view(app->view_dispatcher, BadUsbAppViewError);
}

bool bad_usb_scene_error_on_event(void* context, SceneManagerEvent event) {
    BadUsbApp* app = context;
    bool consumed = false;

    if(event.type == SceneManagerEventTypeCustom) {
        if(event.event == SubghzCustomEventErrorBack) {
            view_dispatcher_stop(app->view_dispatcher);
            consumed = true;
        }
    }
    return consumed;
}

void bad_usb_scene_error_on_exit(void* context) {
    BadUsbApp* app = context;
    widget_clear(app->widget);
}