Pointing Devices for all the PC, IOS, ANDROID, TAB
1. Mouse
The mouse is a hand-held device that controls. a pointer on the screen. The mouse pointing deVICe SltS on your work surface and is moved with your hand. In older mouse, a ball in the bottom of the mouse rolls on the surface as you move the mouse, and internal rollers sense the ball movement and transmit the information to the computer via the cord of the mouse.
The newer optical mouse does not use a rolling ball, but instead uses a light and a small optical sensor to detect the motion of the mouse by tracking a tiny image of the desk surface. Optical mouse avoids the problem of a dirty mouse ball.
2. Touch pad
3. Trackpoint
Some sub-notebook computers (such as the IBM ThinkPad), which lack room for even a touch pad, incorporate a trackpoint, a small rubber projection embedded between the keys of the keyboard. The trackpoint acts like a little joystick that can be used to control the position of the on-screen cursor.
4. Trackball
The trackball is sort of like an upside-down mouse, with the ball located on top. You use your fingers to roll the trackball, and internal rollers (similar to what’s inside a mouse) sense the motion which is transmitted to the computer. Trackballs have the advantage over mouse in that the body of the trackball remains stationary on your desk, so you don’t need as much room to use the trackball.
Trackballs are common on CAD workstations for ease of use. Trackballs are sometimes
seen on computerised special-purpose workstations, such as the radar consoles in an air
traffic control room or sonar equipment on a ship or submarine.
5. Joystick
Joysticks and other game controllers can also be connected to a computer as pointing devices. A j oystick is similar to a mouse, except that with a mouse the cursor stops moving as soon as you stop moving the mouse. With a joystick, the pointer continues moving in the direction the joystick is pointing. A lever moves in all directions and controls the movement of a pointer or some other display symbols. To stop the pointer, you must return the joystick to its upright position. They are generally used for playing games and not fOr controlling the on-screen cursor in productivity software.
7. Graphics Tablet
Pointing Devices for all the PC, IOS, ANDROID, TAB A graphics tablet consists of an electronic writing area and a special “pen” that works with it. Graphics tablet allows artists to create graphical images with motions and actions similar to using more traditional drawing tools. The pen of the graphiCs tablet is pressure sensitive, so pressing harder or solter can result in brush strokes of different width (in an appropriate graphic program). When you draw on the tablet with the special pen (never use an ink pen or pencil!), the drawing appears on the screen. The tablet and pen can also be used like a mouse to move the cursor and click.
Pointing Devices
The graphical user interfaces (GUls) in use today require some key positioning the on-screen cursor. Typical pointing devices are: mouse, tuchpad, trackpoint, graphics tablet, joystick and touch screen.
1. Mouse
The mouse is a hand-held device that controls. a pointer on the screen. The mouse pointing deVICe SltS on your work surface and is moved with your hand. In older mouse, a ball in the bottom of the mouse rolls on the surface as you move the mouse, and internal rollers sense the ball movement and transmit the information to the computer via the cord of the mouse.
The newer optical mouse does not use a rolling ball, but instead uses a light and a small optical sensor to detect the motion of the mouse by tracking a tiny image of the desk surface. Optical mouse avoids the problem of a dirty mouse ball.
2. Touch pad
Most laptop computers today have a touch pad pointing device. You move the on-screen cursor by sliding your finger along the surface of the touch pad. The buttons are located below the pad, but, most touch pads allow you to perform “mouse clicks” by tapping on the pad itself. Touch pads have the advantage over mouse that they take up much less room to use. They have the advantage over trackballs (which were used on early laptops) that there are no moving parts to get dirty and result in jumpy cursor control.
3. Trackpoint
Some sub-notebook computers (such as the IBM ThinkPad), which lack room for even a touch pad, incorporate a trackpoint, a small rubber projection embedded between the keys of the keyboard. The trackpoint acts like a little joystick that can be used to control the position of the on-screen cursor.
4. Trackball
The trackball is sort of like an upside-down mouse, with the ball located on top. You use your fingers to roll the trackball, and internal rollers (similar to what’s inside a mouse) sense the motion which is transmitted to the computer. Trackballs have the advantage over mouse in that the body of the trackball remains stationary on your desk, so you don’t need as much room to use the trackball.
Trackballs are common on CAD workstations for ease of use. Trackballs are sometimes
seen on computerised special-purpose workstations, such as the radar consoles in an air
traffic control room or sonar equipment on a ship or submarine.
5. Joystick
Joysticks and other game controllers can also be connected to a computer as pointing devices. A j oystick is similar to a mouse, except that with a mouse the cursor stops moving as soon as you stop moving the mouse. With a joystick, the pointer continues moving in the direction the joystick is pointing. A lever moves in all directions and controls the movement of a pointer or some other display symbols. To stop the pointer, you must return the joystick to its upright position. They are generally used for playing games and not fOr controlling the on-screen cursor in productivity software.
7. Graphics Tablet
Pointing Devices for all the PC, IOS, ANDROID, TAB A graphics tablet consists of an electronic writing area and a special “pen” that works with it. Graphics tablet allows artists to create graphical images with motions and actions similar to using more traditional drawing tools. The pen of the graphiCs tablet is pressure sensitive, so pressing harder or solter can result in brush strokes of different width (in an appropriate graphic program). When you draw on the tablet with the special pen (never use an ink pen or pencil!), the drawing appears on the screen. The tablet and pen can also be used like a mouse to move the cursor and click.
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