1. A method for controlling model execution in a graphical modeling environment, said method comprising: displaying a view of an executable graphical model with a plurality of executable time-based components, said executable graphical model including at least one user-configurable, executable graphical post component having at least one input port for receiving at least one input signal, said at least one user-configurable, executable graphical post component being configured to post an event when a condition associated with said at least one input signal of said at least one user-configurable, executable graphical post component is satisfied; logically associating at least one executable time-based component with said event; identifying when said condition is satisfied during execution of said executable graphical model; posting, using said at least one user-configurable, executable graphical post component, said event by informing an event handler of an occurrence of said event in said graphical modeling environment; notifying said at least one executable time-based component that is logically associated with said event of said occurrence of said event, said occurrence of said event triggering an execution of said at least one executable time-based component; and executing, within said graphical modeling environment, during a simulation of said executable graphical model, said at least one executable time-based component in response to said notifying as opposed to in response to a specific point in time.