Graphics Mode
There are different types of Mode: -
1. Input
Device: - Input device contains a trigger which can be used to send a
signal to the operating system with the use of mouse buttons, Keyboard keys or
any type of the input instructions. When trigger is fire input device return an
information to the system and forward this information to request mode.
2. Request
Mode: - Input proved a program when user trigger is fire request
mode accept the information from input mode and forward this information with
the desire trigger to the event mode.
3. Event Mode: - Most are system have more then one input devices each of which can be trigger at an arbitrary time by user Each trigger generates an event based on the input mode information which can be examined by the user’s programs.
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