Home- touchhandle.input = function(touchhandle, val, box, x, y)
- touchhandle.buttons = { ... button definitions ... }
SYNOPSIS
DESCRIPTION
This is the most high-level touch screen callback. Whenever a click happens, it is looked up in the touch.buttons table, which contains a list of clickable screen locations. If a match is found, the touch.input callback is called with that information.
The touch.buttons table contains a list of rectangle to value mappings. The rectangle indicates the area where a click is accepted. When a click in such an area is detected, the callback runs with the associated value in val.
Additionally the callback receives the matching rectangle in box and the click coordinates in x and y.
NOTES
Callbacks are called from within event:poll().
EXAMPLE
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app = event.new()
tch = touch.new(app)
tch.buttons = {
[gfx.rect(1, 40, 69, 50)] = "WHATEVER"
}
tch.input = function(tch, val, box, x, y)
print(val, box, x, y)
end
while true do
app:poll()
end
At a click to coordinates 35,55, this will print:
WHATEVER 69x50+1+40 35 55