Get window object on mouse event

Hello, I'm wondering if there is a way to know, when an mouse_up or mouse_down event occurs, on what window the mouse was. In order to easy create some widgets like buttons and so on. Thank you in advance!

You simply check in what area the click occurred. If a button was placed in "x=5, y=4, width=7, height=1" then the area of the button would be: startx=5; endx=5+7-1=11; starty=4; endy=4;.

Here's some sample code:

local btnX, btnY = 4, 3
local btnText = "Click me"

term.setCursorPos(btnX, btnY)
term.setBackgroundColor(colors.gray)
term.setTextColor(colors.lightGray)

term.write(btnText )

while true do
  local event, b, x, y = os.pullEvent("mouse_click")

  if x >= btnX and x <= btnX + #btnText - 1 and y == btnY then
    term.setCursorPos(1, 1)
    term.write("Clicked at " .. os.clock())
  end
end