WEEK TEN
Mouse
Mouse is the most commonly used pointing input devise. It is used to control the cursor or pointer on the screen and to give commands to the computer. It is very easy to use. The mouse is attached with the computer by a cable or wireless connection.The top of mouse contains one wheel and 2 buttons. These buttons can be clicked or double
clicked to perform different tasks.
Two Types of Mouse
The most popular types of mouse are as follows:
(i) Mechanical Mouse: It has a small ball at the bottom. The ball rotates as the mouse is rolled over a flat surface. As the mouse is rolled over the flat surface, the pointermoves in the same direction on the screen.
(ii) Optical Mouse: It has no ball at the bottom. It uses the laser technology to detect the mouse movement. Nowadays, it is commonly used in personal computers (PCs).
2-Trackball
A trackball is a pointing input device. It has move-able ball on its top. The ball is rotated or rolled with fingers (or palm of the hand) to move the pointer on the screen.
3- Touch Pad
Touch pad is also known as track pad. It is a small, flat surface over which a user slides fingertip to move the pointer on the screen.Touch Pad is normally used with laptops.
4- Pointing Stick
It looks like a pencil eraser. It exists between keys of keyboard. It is used to control the movement of a pointer on the screen and is normally used with laptop computers.
5- Joystick
Joystick consists of a vertical handle or hand-held stick mounted on a base. It is used to control the movement of pointer on the screen. It is basically used to play video games
6- Touch Screen
A touch screen is a special video display screen. Input is given to the computer directly by touching the screen with user fingertip.
7- Light Pen
The light pen is a hand-held pointing input device.It looks like a pen connected with the computer by a wire.Input is given to the computer directly by touching the screen with pen.
8- Digitizer or Graphics Tablet
Digitizer is used for drawing new images usually, it is used for making maps andengineering drawings. A digitizer is also known as graphics tablet
Mouse Techniques
Using the mouse involves five techniques:
- Pointing:Move the mouse to move the on-screen pointer.
- Clicking:Press and release the left mouse button once.
- Double-Clicking:Press and release the left mouse button twice.
- Dragging:Hold down the left mouse button as you move the pointer.
- Right-Clicking:Press and release the right mouse button.
- Hover : Move the mouse pointer over an item and let it remain there without clicking either mouse button.
- Ctrl – Clicking : This technique is useful when selecting multiple files or folders
- Shift+clicking : lets you select a series of contiguous files.
- Scrolling : Roll the wheel away from you to scroll up, roll it towards you to scroll down.
- Right dragging-and-dropping an object pops up a menu of options that let you choose whether to Copy or Move the object