#' Empty event queue
#'
#' Empties all pending events from event queue
#' param graphics_list a list created with CRopen(), containing pointers to window, renderer, surface and event
CRflush <- function(graphics_list, type = NULL, status = NULL) {
if ( !isGraphicsList(graphics_list) ) {
warning("Input structure must be graphics_list.")
if (isStatus(status)) {
invisible( .Call("SDLset_status", status, 0, "Input structure must be graphics list.", PACKAGE = "CREx") )
}
} else {
if (!is.null(type) && !type %in% c("key_down", "key_up", "mouse_button_down", "mouse_button_up", "mouse_motion", "mouse_wheel", "controller_axis_motion", "controller_button_down", "controller_button_up", "quit", "window_event")) {
warning("Type to be flushed must be: key_down, key_up, mouse_button_down, mouse_button_up, mouse_motion, mouse_wheel, controller_axis_motion, controller_button_down, controller_button_up, quit, or window_event.")
if (isStatus(status)) {
invisible( .Call("SDLset_status", status, 0, "Type to be flushed must be: key_down, key_up, mouse_button_down, mouse_button_up, mouse_motion, mouse_wheel, controller_axis_motion, controller_button_down, controller_button_up, quit, or window_event.", PACKAGE = "CREx") )
}
} else {
# all checks passed
if (is.null(type)) {
if (isStatus(status)) {
invisible( .Call("SDLflush", graphics_list, status, PACKAGE = "CREx") )
} else {
invisible( .Call("SDLflush", graphics_list, NULL, PACKAGE = "CREx") )
}
} else {
type_i <- which(c("key_down", "key_up", "mouse_button_down", "mouse_button_up", "mouse_motion", "mouse_wheel", "controller_axis_motion", "controller_button_down", "controller_button_up", "quit", "window_event") == type)
if (isStatus(status)) {
invisible( .Call("SDLflush_spec", graphics_list, type_i, status, PACKAGE = "CREx") )
} else {
invisible( .Call("SDLflush_spec", graphics_list, type_i, NULL, PACKAGE = "CREx") )
}
}
}
}
}
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