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Class PegMessageQueue

PegMessageQueue is a simple encapsulated FIFO message queue with member functions for queue management. PegMessageQueue also performs timer maintenance and miscellaneous housekeeping duties.

Messages are placed in the message queue from one of three sources:

• An input device, such as a mouse, touch screen, or keyboard.
• Any other task in the multitasking system.
• An RTPEG-32 object.

The messages placed in PegMessageQueue are the driving force behind the graphical interface. These messages contain notifications and commands which cause the graphical elements to redraw themselves, remove themselves from the screen, resize themselves, or perform any number of various other tasks. Messages can also be user defined, allowing you to send and receive a nearly unlimited number of messages whose meaning is defined by you. For example, it would be very common to have a task send data for display to a graphical element.

The complete API documentation of class PegMessageQueue is included in the RTPEG-32 Reference Manual.

Overview

Class PegScreen

Messages

Message Flow and Routing

System Messages

User Defined Messages

Signals

Class PegPresentationManager