flipperzero-firmware/lib/app-template/app-template.cpp

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#include "flipper.h"
#include "flipper_v2.h"
#include "app-template.h"
/*
To use this example you need to rename
AppExampleState - class to hold app state
AppExampleEvent - class to hold app event
AppExample - app class
app_cpp_example - function that launch app
*/
// event enumeration type
typedef uint8_t event_t;
// app state class
class AppExampleState {
public:
// state data
uint8_t example_data;
// state initializer
AppExampleState() {
example_data = 0;
}
};
// app events class
class AppExampleEvent {
public:
// events enum
static const event_t EventTypeTick = 0;
static const event_t EventTypeKey = 1;
// payload
union {
InputEvent input;
} value;
// event type
event_t type;
};
// our app derived from base AppTemplate class
// with template variables <state, events>
class AppExample : public AppTemplate<AppExampleState, AppExampleEvent> {
public:
void run();
void render(Canvas* canvas);
};
// start app
void AppExample::run() {
// here we dont need to acquire or release state
// because before we call app_ready our application is "single threaded"
state.example_data = 12;
// signal that we ready to render and ipc
app_ready();
// from here, any data that pass in render function must be guarded
// by calling acquire_state and release_state
AppExampleEvent event;
while(1) {
if(get_event(&event, 1000)) {
if(event.type == AppExampleEvent::EventTypeKey) {
// press events
if(event.value.input.state && event.value.input.input == InputBack) {
printf("bye!\n");
exit();
}
if(event.value.input.state && event.value.input.input == InputUp) {
// to read or write state you need to execute
// acquire modify release state
acquire_state();
state.example_data = 24;
release_state();
}
}
}
// signal to force gui update
update_gui();
};
}
// render app
void AppExample::render(Canvas* canvas) {
// here you dont need to call acquire_state or release_state
// to read or write app state, that already handled by caller
canvas_set_color(canvas, ColorBlack);
canvas_set_font(canvas, FontPrimary);
canvas_draw_str(canvas, 2, state.example_data, "Example app");
}
// app enter function
extern "C" void app_cpp_example(void* p) {
AppExample* app = new AppExample();
app->run();
}