Extension: Multitouch. You can touch concurrently zones in screen.

[Juan Antonio]

Hi friends,

Multitouch: multi-touch refers to the capability of a touchscreen  to recognize two or more points of contact on the surface concurrently.

In this extension I use an HorizontalArrangement, 

- Extension split this HA in three horizontal zones with same size (left, medium. right)

When you touch zones left, medium or right, fire an event.

You can touch 2 o 3 zones concurrently.

To distinguish the zones I use images blue and green.

In this example we light 1, 2, or 3 lamps touch zones greens o blue.

- If you touch a color and drag your finger to other color, that lamp remains ON.

This extension is in trial period, in other post I'll upload others Multitouch with 4 and 9 zones, and multitouch in Canvas.

Regards.

Juan Antonio Villalpando.

Tutorial in Spanish: http://kio4.com/appinventor/295_extension_multitouch.htm

Regards,

[Abraham Getzler]

Does this require any Manifest changes or a minimum Android level?

ABG

[Juan Antonio]

Now multitouch with 4 zones.

        

   

- This extension does not modify the AndroiManifest, does not use new permissions or libraries of other authors. I only tried it with API22, but I think it works with most APIs, since it only uses typical Android functions: setOnTouchListener and onTouch, it does not use gesture.

- http://kio4.com/appinventor/295_extension_multitouch.htm

Regards.

[Abraham Getzler]

Have you given any thought to generalizing this to an unlimited

list of zones, either by using Arrangements as zones, or by

linear division?

The touch events would need a Selection subArrangement component

value return value, or a SelectionIndex value, similar to a List Picker

selection event.

ABG

[Juan Antonio]

With this new version we dispone of nine zones.

- This extension uses a TableArrangement with 3 Columns and 3 Rows.

- If you touch a color and drag your finger to other color, that lamp remains ON.

- In Properties, Width of images is 33 percent.

- In this moment number of zone is static (extension builds it), I'll try a dinamic number of zone (user set that number), difficult proposal but I will try.

- In block Coordinates we can get position absolute (Screen) and relative (TableArrangement) of pointer.

- I'll try other possibilities.

http://kio4.com/appinventor/295_extension_multitouch.htm