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#include <QtCore/QEvent>
#include <QtCore/QString>

//! A custom event representing a graphics system switch.
/*!
 This event is sent two times -- before the actual switch and after the switch.
 The current mode of the event can be detected by looking at the State of the
 event.

 The end-user application can use the event to drop it's own allocated GL resources
 when going to software mode.
*/

class Q_DECL_EXPORT QMeeGoSwitchEvent : public QEvent
{
public:

    //! The state represented by this event.
    enum State {
        WillSwitch,
        DidSwitch
    };

    //! Constructor for the event.
    /*!
     Creates a new event with the given name and the given state.
    */
    QMeeGoSwitchEvent(const QString &graphicsSystemName, State s);

    //! Returns the name of the target graphics system.
    /*!
     Depending on the state, the name represents the system we're about to swtich to,
     or the system we just switched to.
    */
    QString graphicsSystemName() const;

    //! Returns the state represented by this event.
    State state() const;

    //! Returns the event type/number for QMeeGoSwitchEvent.
    /*!
     The type is registered on first access. Use this to detect incoming
     QMeeGoSwitchEvents.
    */
    static QEvent::Type eventNumber();

private:
    QString name;
    State switchState;
};