Effective synchronous communication of screen information shared among information processing apparatuses

An information sharing system comprising:

• a plurality of information processing apparatuses each including a memory and a processor coupled to the memory, wherein:
• the memory is configured to store a priority with which data is to be transmitted, in association with an application that operates using each of a plurality of windows displayed on the common displaying space;
• and
• the processor is configured to:
• in response to updating of data executed by each of a plurality of applications, perform transmission and reception of the updated data,
• upon reception of first updated data generated by a first application, change, based on proximity between a first window of the first application and a second window of a second application, a second priority that is stored in association with the second application in the memory, and
• when second updated data is generated by the second application that operates using the second window displayed on the information processing apparatus, determine, based on the changed second priority that is stored in the memory in association with the second application, a turn in order of transmission of the second updated data generated by the second application,
• perform at least one of a first changing process, a second changing process, and a third changing process;
• and
• changes the second priority associated with the second application by performing the at least one of the first changing process, the second changing process, and the third changing process, wherein:
• the first changing process includes changing the second priority associated with the second application, based on a distance between the first window and the second window, and a display area of each of the first window and the second window;
• the second changing process includes changing the second priority associated with the second application, based on a difference between an update time of the first updated data and an update time of the second updated data generated using the second window of the second application;
• and
• the third changing process includes changing the second priority associated with the second application, based on a relevancy between the first window and the second window.

A synchronous control method performed by a plurality of information processing apparatuses that share a common displaying space, the synchronous control method comprising:

• providing a second information processing apparatus with a memory that stores a priority with which data is to be transmitted, in association with an application which operates using each of a plurality of windows displayed on the common displaying space;
• causing a first information processing apparatus to, in response to updating of data executed by a first application among a plurality of applications that operate using respective windows displayed on the common displaying space, transmit first updated data generated by the first application, to the plurality of information processing apparatuses;
• and
• causing the second information processing apparatus to:
• upon reception of the first updated data, change, based on proximity between a first window of the first application that has generated the first updated data and a second window of a second application, a second priority that is stored in association with the second application in the memory,
• when second updated data is generated by the second application that operates using the second window displayed on the second information processing apparatus, determine, based on the changed second priority that is stored in the memory in association with the second application, a turn in order of transmission of the second updated data generated by the second application, and
• transmit the second updated data generated by the second application, based on the determined turn, to the plurality of information processing apparatuses that share the common displaying space,
• perform at least one of a first changing process, a second changing process, and a third changing process;
• and
• changes the second priority associated with the second application by performing the at least one of the first changing process, the second changing process, and the third changing process, wherein:
• the first changing process includes changing the second priority associated with the second application, based on a distance between the first window and the second window, and a display area of each of the first window and the second window;
• the second changing process includes changing the second priority associated with the second application, based on a difference between an update time of the first updated data and an update time of the second updated data generated using the second window of the second application;
• and
• the third changing process includes changing the second priority associated with the second application, based on a relevancy between the first window and the second window.