Add multi-display support about kiosk

[thedittmer]

I'm using Kiosk with dual monitors to display digital signage. The primary display on the left is the Kiosk window and the secondary screen on the right is a full screen browser window. At this point I'm using Kiosk basically just to keep the chromebox from going to sleep. In this video it's actually just displaying two browser windows full screen, but I installed the Kiosk app after I made the video.
https://www.youtube.com/watch?v=JBBq-hSOWjc

[matt-cook]

One option is to use hardware compatible with NVIDIA Mosaic: http://www.nvidia.com/object/nvidia-mosaic-technology.html

[matt-cook]

May be possible to implement a solution for other (non-Mosaic) hardware using a combination of:

https://developer.chrome.com/apps/system_display#property-callback-displayInfo
https://developer.chrome.com/apps/app_window

[matt-cook]

The simplest, most flexible solution I can think of would be set of fields under a new "Display" section:

"Window Location" (or similar wording, drop-down menu):

• "Fullscreen: Primary Display"
• "Fullscreen: All Screens"
• "Fullscreen: Display 1"
• ... "Fullscreen: Display n", (number of displays from chrome.system.display.getInfo())
• "Custom"

If "Custom" was selected we could then conditionally show additional fields: x,y,width,height.

The core functionality that will need to be modified lives here:
https://github.com/zebradog/kiosk/blob/master/src/js/main.js#L29
and here: https://github.com/zebradog/kiosk/blob/master/src/js/browser.js#L230

Probably that should be moved to a shared.js file or similar rather than reproducing twice, a bit sloppy currently. Logic should remain the same for "Fullscreen: Primary Display" to protect existing functionality state: fullscreen will need to be removed as well as the calls to win.fullscreen() if a setting other than "Fullscreen: Primary Display" is selected.

[matt-cook]

Work on this has been started by @seantrace in https://github.com/zebradog/kiosk/pull/88

[wvengen]

It sounds like this is about displaying a single window on a specific or all screens.
I'd be interested in showing different URLs on different screens.

[wvengen]

A very rough idea sketching how the setup screen could look like. Might this work?

With only one screen attached, something very much like the current setup screen would be shown.
The Display section would be missing for the Primary Display.

[wvengen]

Also, with @seantrace's PR missing now, one can find the code here.

[wvengen]

If I were to try implementing multi-screen functionality that would allow showing different URLs on different screens, would #88 be good to start from, or master?

[matt-cook]

This issue was moved to https://discuss.kiosk.cook.company/t/add-multi-display-support/65

[matt-cook]

https://cookcompany.zendesk.com/agent/tickets/532