function updateWindows(ev)
        ev=ev or {}
        local oneClicked=false
        local clicked=false
        local clickedID=0
        for i=1, #windows do
            if windows[i] then
                local win = windows[i]
                if ev[1]=="mouse_click" then
                    if ev[2]==1 and ev[3]==win.x+win.width-1 and ev[4]==win.y then
                        killProcess(win)
                        break
                    end
                    if ev[2]==1 and ev[3]>=win.x and ev[3]<=win.x+win.width-2 and ev[4]==win.y then
                        win.partX=ev[3]-win.x
                        win.drag=true
                    else
                        win.drag=false
                    end
                    if ev[3]>=win.x and ev[3]<=win.x+win.width-1 and ev[4]>=win.y and ev[4]<=win.y+win.height then
                        clicked=win
                        clickedID=i
                    else
                        win.active=false
                        clicked=false
                        clickedID=0
                    end
                end
                if ev[1]=="mouse_drag" then
                    if win.drag then
                        if ev[2]==1 then
                            win.x=ev[3]-win.partX
                            win.y=ev[4]
                        end
                    end
                end
                if clicked then
                    for i=1, #windows do
                        windows[i].active=false
                        windows[i].id=i
                    end
                    table.remove(windows, clickedID)
                    for i=1, #windows do
                        windows[i].id=i
                        windows[i].drag=false
                    end
                    windows[#windows+1]=clicked
                    clicked.active=true
                    currActive=clicked
                    clicked=nil
                    clicked=false
                    for i=1, #windows do
                        windows[i].id=i
                    end
                end
            end
        end
    end