Responsive user interface to manage a non-responsive application

A multithreaded computing system for executing an application having a user interface, wherein if the application is non-responsive, the user interface is replaced by a ghost user interface, the system comprising:

• a processor;
• a memory coupled to said processor;
• the memory having stored thereon:
• a plurality of computer executable instructions for generating, via a system thread, a plurality of events for handling by the application, generating a timestamp, via the system thread, comprising a time when each of the plurality of events are entered in an event queue of the application, and checking, via the system thread, the event queue to determine the time when a last event in the plurality of events entered in the event queue, was handled by the application;
• non-responsive-application detecting code for detecting a non-responsive application, wherein the non-responsive application is detected when the application has not handled any of the plurality of events in the event queue for greater than a threshold time, wherein different types of events in the plurality of events entered in the event queue have their own threshold times;
• a ghost thread for creating the ghost user interface to replace the user interface in response to detection of a non-responsive application, wherein creating the ghost user interface includes creating a ghost thread, which, in turn, creates the ghost user interface, wherein the ghost thread handles at least one event corresponding to a close operation in an area covered by the ghost user interface, the close operation comprising a forced termination of the non-responsive application, wherein the non-responsive application is terminated by automatically invoking a computer operating system application program, wherein the plurality of events are divided into two sets of events, wherein a first set of events is handled by the ghost thread in lieu of the application, and wherein a second set of events is cached for later handling by the application after the application is responsive, wherein the second set of events comprises input events with the ghost user interface in focus, wherein the ghost user interface is in focus when the ghost user interface is in the foreground;
• a high priority special entry in a message queue of the application for detecting if the application is responsive, wherein the high priority special entry is handled ahead of other entries in the message queue, wherein the other entries in the message queue comprise a last location of the ghost user interface corresponding to a present location of the ghost user interface and which replaces, in the message queue, at least one intermediate move command previously executed on the ghost user interface, and wherein the last location of the ghost user interface is utilized as a location to restore the user interface of the application;
• and
• a plurality of computer executable instructions for destroying the ghost user interface in response to handling of the high priority special entry by the application.

A computer-readable storage medium having computer executable instructions which, when executed by a computer, will cause the computer to perform a method for managing an original user interface of an application, comprising:

• generating, via a system thread, a plurality of events for handling by the application;
• generating a timestamp, via the system thread, comprising a time when each of the plurality of events are entered in an event queue of the application;
• checking, via the system thread, the event queue to determine the time when a last event in the plurality of events entered in the event queue, was handled by the application;
• signaling a hung state for the application when the application has not handled any of the plurality of events in the event queue for greater than a threshold time, wherein different types of events in the plurality of events entered in the event queue have their own threshold times;
• creating a ghost user interface in response to the hung state that appears in place of the original user interface, wherein creating the ghost user interface includes creating a ghost thread, which, in turn, creates the ghost user interface, wherein the ghost thread handles at least one event corresponding to a close operation in an area covered by the ghost user interface, the close operation comprising a forced termination of the application having the hung state, wherein the application is terminated by automatically invoking a computer operating system application program, wherein the plurality of events are divided into two sets of events, wherein a first set of events is handled by the ghost thread in lieu of the application, and wherein a second set of events is cached for later handling by the application after the application is no longer in the hung state, wherein the second set of events comprises input events with the ghost user interface in focus, wherein the ghost user interface is in focus when the ghost user interface is in the foreground;
• placing a high priority special event in an event queue of the application, wherein the high priority special event is handled ahead of other entries in the event queue and wherein the handling of the high priority special event triggers replacing the ghost user interface with the original user interface resulting in the destruction of the ghost interface when the application becomes responsive from the hung state, wherein the other entries in the event queue comprise a last location of the ghost user interface corresponding to a present location of the ghost user interface and which replaces, in the event queue, at least one intermediate move command previously executed on the ghost user interface, and wherein the last location of the ghost user interface is utilized as a location to replace the ghost user interface with the original user interface of the application.