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/*!

    \example statemachine/twowaybutton

    \title Two-way Button Example

    The Two-way button example shows how to use \l{The State Machine

    Framework} to implement a simple state machine that toggles the current

    state when a button is clicked.

    \snippet examples/statemachine/twowaybutton/main.cpp 0

    The application's main() function begins by constructing the application

    object, a button and a state machine.

    \snippet examples/statemachine/twowaybutton/main.cpp 1

    The state machine has two states; \c on and \c off. When either state is

    entered, the text of the button will be set accordingly.

    \snippet examples/statemachine/twowaybutton/main.cpp 2

    When the state machine is in the \c off state and the button is clicked,

    it will transition to the \c on state; when the state machine is in the \c

    on state and the button is clicked, it will transition to the \c off

    state.

    \snippet examples/statemachine/twowaybutton/main.cpp 3

    The states are added to the state machine; they become top-level (sibling)

    states.

    \snippet examples/statemachine/twowaybutton/main.cpp 4

    The initial state is \c off; this is the state the state machine will

    immediately transition to once the state machine is started.

    \snippet examples/statemachine/twowaybutton/main.cpp 5

    Finally, the button is resized and made visible, and the application event

    loop is entered.

*/