Tips when coding for Pebble

A lighting talk I gave at the first german Pebble meetup with some tips that are not commonly known.

Transcript

1. Tips when coding for Pebble Lightning Talk
2. Tools 4 C SDK (runs on Pebble) 4 iOS SDK 4 Android SDK 4 JavaScript SDK (runs on iOS and Android devices)
3. If you hate C...
4. Pebble.js1 1 http://developer.getpebble.com/guides/js-apps/pebble-js/
5. var UI = require('ui'); // Create a Card with title and subtitle var card = new UI.Card({ title:'Weather', subtitle:'Fetching...' }); // Display the Card card.show();
6. Android Actionable Notifications2 2 http://developer.getpebble.com/blog/2014/12/19/Leverage-Android-Actionable-Notifications/
8. If you just hate .h files...
9. makeheaders3 By D. Richard Hipp (author of SQLite) 3 http://www.hwaci.com/sw/mkhdr/
10. // code.c #import "code.h" void a() { b(); } void b() { a(); } Doesn't work well with #defines though.
11. If C is not hip enough...
12. Rust4 But only when using core. 4 https://github.com/sirlantis/RustyPebble/tree/fix-for-rust-1.0-beta
13. extern fn window_load_handler(window: *mut Window) { app_log(AppLogLevel::Debug, "window loaded!\0"); let window_layer = window_get_root_layer(window); let window_bounds = layer_get_bounds(window_layer); let text_bounds = GRect { origin: GPoint { x: 0, y: 72 }, size: GSize { w: window_bounds.size.w, h: 20 } }; let text_layer = text_layer_create(text_bounds); text_layer_set_text(text_layer, "Press a button\0"); // ...
14. Nim(rod)5 But you have to disable a few features. 5 https://github.com/sirlantis/pebble-nim
15. proc window_load_handler(window: ptr Window) {.cdecl.} = app_log(APP_LOG_LEVEL_DEBUG, "window loaded!") let window_layer = window_get_root_layer(window) let window_bounds = layer_get_bounds(window_layer) let text_bounds = GRect( origin: GPoint(x: 0, y: 72), size: GSize(w: window_bounds.size.w, h: 20) ) let text_layer = text_layer_create(text_bounds) text_layer_set_text(text_layer, "Press a button") // ...
16. Can I use Go?
17. No !
18. Unnamed Fields6 ms-extensions 6 https://gcc.gnu.org/onlinedocs/gcc/Unnamed-Fields.html
19. typedef struct Node { uint8_t id; } typedef struct Button { char *label; Node; } Button btn = create_button(); btn.id = 3;
20. Even more Goish... plan9-extensions6 6 https://gcc.gnu.org/onlinedocs/gcc/Unnamed-Fields.html
21. Automatically casts to embedded fields. void function_taking_a_node(Node *node) { // ... } Button btn = create_button(); function_taking_a_node(btn); // vs: function_taking_a_node((Node *)btn); 4 Tip: make the unnamed field the first field to allow upcasting.
22. 4 Add them to the configure section in your wscript def configure(ctx): ctx.load('pebble_sdk') ctx.env.append_value('CFLAGS', '-fplan9-extensions') # plan9-extensions are a superset of ms-extensions
23. Other Tips
24. PebbleX (XCode)7 written by Heiko 7 https://github.com/HBehrens/pebblex
25. Write your own Tools
26. if [ -f .phone-env ]; then source .phone-env; fi export PEBBLE_PHONE=${PEBBLE_PHONE:-127.0.0.1} export PEBBLE_PORT=${PEBBLE_PORT:-9000} if ! nc -w2 -z "$PEBBLE_PHONE" "$PEBBLE_PORT" &> /dev/null; then phone=$(bin/prompt) # uses `osascript` if [ -n "$phone" ]; then echo "PEBBLE_PHONE=$phone" > .phone-env export PEBBLE_PHONE=$phone else exit "No phone IP set." fi fi echo "Installing app..." exec pebble install --logs