Screen Pointing Devices

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Welcome to class! 

In today’s class, we will be talking about screen pointing devices. Enjoy the class!

Screen Pointing Devices

Screen pointing devices can be defined as any hardware component that allows the user to input spatial data into the computer using physical gesture such as point click and drag.

Types of pointing devices

There are several pointing devices which are:

Mouse:

A mouse is an input device that is used for controlling the cursor on the computer monitor to point and select the object or give command on the computer screen. It is usually placed on a mouse pad.

Types of mouse

The most popular types of the mouse are as follows:

• Mechanical Mouse:

It has a small ball at the bottom. The ball rotates as the mouse is rolled over a flat surface. Usually, a rectangular rubber pad (known as a mouse pad) is used as a flat surface. As the mouse is rolled over the flat surface, the pointer moves in the same direction on the screen.

• Optical Mouse:

It has no ball at the bottom. It uses laser technology to detect the mouse movement. Nowadays, it is commonly used in personal computers (PCs).

Functions of the mouse

1. Clicking
2. Pointing
3. Double-clicking
4.  Right-clicking.
5. Dragging

TouchPad:

The touchPad is a pressure-sensitive pointing device. The touchpad is also known as a trackpad. It is also a stationary device like a trackball, but it has no moving parts. It is a small, flat surface (or sensitive pad) over which a user slides fingertip to move the pointer on the screen.

TouchPad also has one or two buttons. These buttons are located near the pad. These buttons work like mouse buttons. The touchPad is normally used with laptops. Nowadays, it is also available as a separate input device. It is fixed on a separate keyboard.

Trackball:

A trackball is a pointing input device. It performs functions like a mouse, but it is a stationary device. It has a move-able ball on its top. The ball is rotated or rolled with fingers (or the palm) to move the pointer on the screen. Like a mouse, a trackball also has buttons used to send the commands to the computer.

 

In our next class, we will be talking more about Screen Pointing Devices.  We hope you enjoyed the class.

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