Hi I'm trying to implement settings on my watch face but I don't want to load settings on every onUpdate() but just onLayout() or when they changed.
My code works in the emulator but it's not working on a device.
Here is how I implemented it:
class MyApp extends Application.AppBase {
hidden var _view = new MyView();
...
// Return the initial view of your application here
function getInitialView() as Array? {
return [ _view ] as Array;
}
// New app settings have been received so trigger a UI update
function onSettingsChanged() as Void {
_view.onSettingsChanged();
}
...
}
class MyApp extends Application.AppBase {
hidden var _view = new MyView();
...
// Return the initial view of your application here
function getInitialView() as Array? {
return [ _view ] as Array;
}
// New app settings have been received so trigger a UI update
function onSettingsChanged() as Void {
_view.onSettingsChanged();
}
...
}
Could you help me?
EDITED - January 14th, 2023:
[SOLVED]
To make the code example simpler, and focused on the investigated problem, I omitted here in this post some lines of my full code.
Unfortunately, the real problem was in one of those lines, where the _loadResources() method was called.
As _psx_ pointed out, the problem with this is the attempt to load resources (a storage operation) outside of onLayout().
Also, _psx_ also pointed out the problem with instantiating my View outside of my App class's getInitialView().
Below is my incorrect code, still simplified, but with these problems (red lines):
class MyApp extends Application.AppBase {
hidden var _view = new MyView();
...
// Return the initial view of your application here
function getInitialView() as Array? {
return [ _view ] as Array;
}
// New app settings have been received so trigger a UI update
function onSettingsChanged() as Void {
_view.onSettingsChanged();
}
...
}
class MyView extends WatchUi.WatchFace {
private var _lastMinute = 0;
private var _propertiesChanged = false;
...
function onLayout(dc as Dc) as Void {
_loadResources();
_loadSettings();
}
public function onSettingsChanged() as Void {
_loadResources();
_loadSettings();
_propertiesChanged = true;
requestUpdate();
}
function onUpdate(dc as Dc) as Void {
var clockTime = System.getClockTime();
if ((clockTime.min != _lastMinute) || _propertiesChanged) {
_propertiesChanged = false;
_draw(dc);
}
_lastMinute = clockTime.min;
}
...
}
And below is the correct code:
class MyApp extends Application.AppBase {
hidden var _view;
...
// Return the initial view of your application here
function getInitialView() as Array? {
_view = new MyView();
return [ _view ] as Array;
}
// New app settings have been received so trigger a UI update
function onSettingsChanged() as Void {
_view.onSettingsChanged();
}
...
}
class MyView extends WatchUi.WatchFace {
private var _lastMinute = 0;
private var _propertiesChanged = false;
...
function onLayout(dc as Dc) as Void {
_loadResources();
_loadSettings();
}
public function onSettingsChanged() as Void {
// REMOVED _loadResources()
_loadSettings();
_propertiesChanged = true;
requestUpdate();
}
function onUpdate(dc as Dc) as Void {
var clockTime = System.getClockTime();
if ((clockTime.min != _lastMinute) || _propertiesChanged) {
_propertiesChanged = false;
_draw(dc);
}
_lastMinute = clockTime.min;
}
...
}
The full source code can be seen here:
https://github.com/eldes/presbyopia-watch-face
