/// <summary>
/// Returns an array of events in the event queue.
/// It does not remove them from the event queue.
/// </summary>
/// <param name="eventMask">Mask of events to find in queue</param>
/// <param name="numberOfEvents">Number of events to find in queue</param>
/// <returns>Array of events in queue.</returns>
public static SdlEventArgs[] Peek(EventMask eventMask, int numberOfEvents)
{
Sdl.SDL_Event[] events = new Sdl.SDL_Event[numberOfEvents];
Sdl.SDL_PumpEvents();
int result =
Sdl.SDL_PeepEvents(
events,
events.Length,
Sdl.SDL_PEEKEVENT,
(int)eventMask);
if (result == (int)SdlFlag.Error)
{
throw SdlException.Generate();
}
SdlEventArgs[] eventsArray = new SdlEventArgs[result];
for (int i = 0; i < eventsArray.Length; i++)
{
if (events[i].type == (byte)EventTypes.UserEvent)
{
eventsArray[i] = (UserEventArgs)userEvents[events[i].user.code];
}
else
{
eventsArray[i] = SdlEventArgs.CreateEventArgs(events[i]);
}
}
return(eventsArray);
}
/// <summary>
/// Checks the event queue, and processes
/// any events it finds by invoking the event properties
/// </summary>
/// <returns>
/// True if any events were in the queue, otherwise False
/// </returns>
public static bool Poll()
{
try
{
Sdl.SDL_Event ev;
int ret = Sdl.SDL_PollEvent(out ev);
if (ret == (int)SdlFlag.Error)
{
throw SdlException.Generate();
}
if (ret == (int)SdlFlag.None)
{
return(false);
}
else
{
ProcessEvent(ev);
return(true);
}
}
catch (AccessViolationException)
{
return(false);
}
}
/// <summary>
/// Checks the event queue, and waits until an event is available
/// </summary>
/// <remarks></remarks>
public static void Wait()
{
Sdl.SDL_Event ev;
if (Sdl.SDL_WaitEvent(out ev) == (int)SdlFlag.Error2)
{
throw SdlException.Generate();
}
ProcessEvent(ev);
}
/// <summary>
/// Initialize timer.
/// </summary>
public static bool Initialize()
{
if ((Sdl.SDL_WasInit(Sdl.SDL_INIT_TIMER))
== (int)SdlFlag.FalseValue)
{
if (Sdl.SDL_Init(Sdl.SDL_INIT_TIMER) != (int)SdlFlag.Success)
{
throw SdlException.Generate();
}
return(false);
}
else
{
return(true);
}
}
/// <summary>
/// Returns an array of events in the event queue.
/// </summary>
/// <param name="eventMask">Mask for event that will be removed from queue</param>
/// <param name="numberOfEvents">Number of events to remove</param>
public static void Remove(EventMask eventMask, int numberOfEvents)
{
Sdl.SDL_Event[] events = new Sdl.SDL_Event[numberOfEvents];
Sdl.SDL_PumpEvents();
int result =
Sdl.SDL_PeepEvents(
events,
events.Length,
Sdl.SDL_GETEVENT,
(int)eventMask);
if (result == (int)SdlFlag.Error)
{
throw SdlException.Generate();
}
}
/// <summary>
/// Polls and processes a given number of events before returning false
/// </summary>
/// <remarks>If the are no more events, the method will return false</remarks>
/// <param name="numberOfEvents">
/// Nunmber of events to process at a time at most
/// </param>
/// <returns>Returns false when done processing events</returns>
public static bool Poll(int numberOfEvents)
{
Sdl.SDL_Event ev;
for (int i = 0; i <= numberOfEvents; i++)
{
int ret = Sdl.SDL_PollEvent(out ev);
if (ret == (int)SdlFlag.Error)
{
throw SdlException.Generate();
}
if (ret == (int)SdlFlag.None)
{
break;
}
else
{
ProcessEvent(ev);
}
}
return(false);
}
/// <summary>
/// Returns basic exception
/// </summary>
public SdlException()
{
SdlException.Generate();
}