runplus: show satelite strength bar (+setting)

[bobrippling]

This adds an option to show the satelite strength as a bar, to allow people to gauge how accurate the pace (and related stats) are, while running.

• Test on a run

[bobrippling]

@gfwilliams for some reason the main boxes are scooted over to the right (I would expect left), when I add a column to their right:

Compared to the setting being off, so no column added on the left:

The code that adds the bar is:

BangleApps/apps/runplus/app.js

Lines 226 to 241 in 4473072

	topLevel = {
	type: "h",
	c: [
	{
	type: "custom",
	render: drawGpsLvl,
	id: "gpslvl",
	filly: 1,
	width: 5,
	bgCol: g.theme.bg, // automatically clears before render()
	},
	topLevel,
	]
	}
	}
	let layout = new Layout(topLevel, {lazy:true, btns:[{ label:"---", cb: onStartStop, id:"button"}]});

Is this something odd in layout?

[gfwilliams]

It does seem to be something strange in Layout. I'm looking into it, but right now it seems to be caused by the button label that gets added. If you remove the btns argument it lays out properly.

[gfwilliams]

Ok, I've just fixed it, but because we're building Layout in now, you'll need a whole new firmware for this to work :(

Short of hard-coding the widths of the columns I don't think there's a great solution for this.

But what about some other options:

• We already have 8 pixels over the right-hand side where the button's text is. Could you just draw in there? As long as you redraw after layout.render(); it'd be ok
• Or what about adding a custom renderer for the GPS area? Then you could have your GPS accuracy bar in there, since we already change the background colour based on whether we have a fix or not we might as well change it to the colours you've used, and maybe add the percent bar in there in the background?
• Or you could add it as a widget in the widget bar (you can easily add one that only shows in runplus)?
• ...or what about a widget that can be installed and would display in any apps where GPS is enabled?

[bobrippling]

Thanks for the fix!

But what about some other options:

• We already have 8 pixels over the right-hand side where the button's text is. Could you just draw in there? As long as you redraw after layout.render(); it'd be ok

• Or what about adding a custom renderer for the GPS area? Then you could have your GPS accuracy bar in there, since we already change the background colour based on whether we have a fix or not we might as well change it to the colours you've used, and maybe add the percent bar in there in the background?

• Or you could add it as a widget in the widget bar (you can easily add one that only shows in runplus)?

• ...or what about a widget that can be installed and would display in any apps where GPS is enabled?

Sure - I'll try those out and see how they look 🎨

[pavelmachek]

In "sky spy", I was playing with different ideas to determine if GPS signal is reliable. Best way probably is to compare GPS and barometer heights, and if that difference is too big or changes rapidly, GPS is not reliable.