issue with click event

[jeromeetienne]

• click event is trigger IFF button is pressed and release on the same element
• see http://stackoverflow.com/questions/12572644/differentiate-click-vs-mousedown-mouseup answer
• so to 'insert' the joystick canvas on mouse down makes it such as the button is pressed on the element below and release on joyrstick canvas

  not sure how to fix

[jeromeetienne]

fix alternative 1

• update the canvas position all the time on mousemove
• just make it visible when pressed

[jeromeetienne]

fix alternative 2

• make it so large it always use the whole screen
• with a lot of padding around the canvas