How does the GUI support multi-touch？

[renjianfeng]

Hi, I have three button on the GUI interface, I mainly want to implement a game handle, a button says "fire", the other two buttons said "direction", now the problem is, when I press the two buttons at the same time, "onPointerDownObservable" event is executed correctly, but "onPointerUpObservable" event only carried out the last of the button, how to set up a web page or other parameters?

thinks！！！

[renjianfeng]

I realized it at the playground

As you can see, when you press two buttons at the same time and then release one, the up event of the other button is also executed.

https://www.babylonjs-playground.com/#XCPP9Y#532

 

[trevordev]

I'm not sure I repro'd exactly what you are seeing but I did notice that touch both buttons at once and then releasing causes a right click event to be fired which might be interrupting your up/down events. I disabled right clicking on the canvas using 

$("#renderCanvas").bind("contextmenu", ()=>{

return false

})

 

This stops the right click event and up/down events seem to work expected now for me here (tested with: Chrome + laptop with touchscreen): https://www.babylonjs-playground.com/#XCPP9Y#533

 

Let me know if this still doesn't fix your issue.

[renjianfeng]

On 5/30/2018 at 2:20 AM, trevordev said:

I'm not sure I repro'd exactly what you are seeing but I did notice that touch both buttons at once and then releasing causes a right click event to be fired which might be interrupting your up/down events. I disabled right clicking on the canvas using 

$("#renderCanvas").bind("contextmenu", ()=>{

return false

})

 

This stops the right click event and up/down events seem to work expected now for me here (tested with: Chrome + laptop with touchscreen): https://www.babylonjs-playground.com/#XCPP9Y#533

 

Let me know if this still doesn't fix your issue.

Please ignore this stupid question of mine, because it works well in the latest version. Thank you for your advice.