simple_app_1

Simple App 1

What to learn here?

• How to print a string
• How to add an icon to the app
• How to log shit

Using ViewPort is the easiest way to create GUI interface.

Import headers:

#include <furi.h>
#include <gui/gui.h>

Create a view_port object:

ViewPort* view_port = view_port_alloc();

Create draw and input callbacks:

static void draw_callback(Canvas* canvas, void* ctx) {}
static void input_callback(InputEvent* input_event, void* ctx) {}

...
view_port_draw_callback_set(view_port, draw_callback, app);
view_port_input_callback_set(view_port, input_callback, app);

Register view_port in gui:

Gui* gui = furi_record_open(RECORD_GUI);
gui_add_view_port(gui, view_port, GuiLayerFullscreen);

Free:

view_port_enabled_set(view_port, false); // Disable ViewPort
gui_remove_view_port(gui, view_port);
view_port_free(view_port);
furi_record_close(RECORD_GUI);

Structure

App:

typedef struct {
    Gui* gui;
    ViewPort* view_port;
} App;

...

Highlights

If context attr is not used you shoud use UNUSED() function.

static void draw_callback(Canvas* canvas, void* ctx) {
    // App* app = ctx;
    UNUSED(ctx);