buttonchoose

#buttonchoose

##Syntax buttonchoose (choice : string)

##Description The buttonchoose procedure is used to change the mode of the mouse. In Turing, the mouse can either be in "single-button mode" or in "multi-button mode". In "single-button mode" the mouse is treated as a one button mouse. A button is considered pressed when any button is pressed and released only when all buttons have been released.

In Turing, the mouse starts in "single-button mode".

The parameter choice can be one of "singlebutton", "onebutton" (which switch the mouse into "single-button mode") or "multibutton" (which switches the mouse into "multi-button mode").

##Example A program that displays the status of the mouse at the top left corner of the screen.

    buttonchoose ("multibutton")
    var x, y, button, left, middle, right : int
    mousewhere (x, y, button)
    left := button mod 10           % left = 0 or 1
    middle := (button - left) mod 100   % middle = 0 or 10
    right := button - middle - left     % right = 0 or 100
    if left = 1 then
        put "left button down"
    end if
    if middle = 10 then
        put "middle button down"
    end if
    if right = 100 then
        put "right button down"
    end if

##See also buttonmoved.html and buttonwait.html to get mouse events saved in a queue. See also mousewhere.html to get the current status of mouse button(s).

See also predefined unit mousemodule.html.