ButtonTest

local buttons = {}
buttons.event = {}

button.items = {
    [1] = {
            text = "test";
            minX = 1;
            maxX = 10;
            minY = 5;
            maxX = 15;
            toggle = true;
            pressTime = 0;
            func = printStuff;
        }
}

function buttons.draw()
    for i = 1,#buttons.items do
        term.setTextColor(1)
        if buttons.items[i].active then
            term.setBackgroundColor(colors.green)
        else
            term.setBackgroundColor(colors.red)
        end
        buttons.xSpot = math.floor(math.abs(((buttons.items[i].maxX-buttons.items[i].minX)-string.len(buttons.items[i].text))/2))
        buttons.ySpot = math.floor(math.abs((buttons.items[i].maxY-buttons.items[i].maxY)/2))
        for y = buttons.items[i].minY,buttons.items[i].maxY do
            term.setCursorPos(buttons.items[i].minX,y)
            if y == buttons.ySpot then
                for x = buttons.items[i].minX,buttons.items[i].maxX do
                    if x == buttons.xSpot then
                        term.write(" ")
                    else
                        term.write(buttons.items[i].text)
                    end
                end
            end
        end
    end
end

function buttons.checkClick(sX,sY)
    for i = 1,#buttons.items do
        if buttons.items[i].minX <= sX
        and buttons.items[i].maxX >= sX
        and buttons.items[i].minY <= sY
        and buttons.items[i].maxY >= sY then
            return i
        end
    end
end

function buttons.run(sIndex)
    buttons.func = buttons.items[sIndex].func
    buttons.func()
end

--Main loop
while true do
    buttons.draw()
    buttons.event[1],buttons.event[2],buttons.event[3],buttons.event[4] = os.pullEvent()
    if buttons.event[1] == "mouse_click" then
        buttons.index = checkClick(buttons.event[3],buttons.event[4])
        if buttons.items[buttons.index].active then
            if buttons.items[buttons.index].toggle then
                buttons.items[buttons.index].active = false
            end
        else
            buttons.run(buttons.index)
            buttons.items[buttons.index].active = true
            if not buttons.items[buttons.index].toggle then
                buttons.items[buttons.index].timer = os.startTimer(buttons.items[buttons.index].pressTime)
            end
        end
    elseif buttons.event[1] == "timer" then
        for i = 1,#buttons.items do
            if buttons.items[i].timer == buttons.event[2]
                buttons.index = i
            end
        end
        buttons.items[buttons.index].active = false
    end
end