the Mouse
•Handheld pointing device
–very common
–easy to use
•Two characteristics
–planar movement
–buttons
(usually from 1 to 3 buttons on top, used for
making a selection, indicating an option, or to
initiate drawing etc.)
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Exploring Input Devices: Mice, Touchpads, Trackballs, Joysticks, and Touchscreens, Slides of Human Resource Management
An in-depth exploration of various input devices, focusing on mice, touchpads, trackballs, joysticks, and touchscreens. Topics covered include their characteristics, working mechanisms, advantages, disadvantages, and related devices such as footmice and touch-sensitive screens. Understand the differences between mechanical and optical mice, the importance of acceleration settings for touchpads, and the advantages and disadvantages of using touchscreens.
Typology: Slides
2012/2013
1 / 10
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the Mouse
• Handheld pointing device
– very common
– easy to use
• Two characteristics
– planar movement
– buttons
(usually from 1 to 3 buttons on top, used for
making a selection, indicating an option, or to
initiate drawing etc.)
the mouse (ctd)
Mouse located on desktop
- requires physical space
- no arm fatigue
Relative movement only is detectable.
Movement of mouse moves screen cursor
Screen cursor oriented in (x, y) plane, mouse movement in (x, z) plane …
… an indirect manipulation device.
- device itself doesn’t obscure screen, is accurate and fast.
- hand-eye coordination problems for novice users
Even by foot …
• some experiments with the footmouse
- controlling mouse movement with feet …
- not very common :-)
• but foot controls are common elsewhere:
- car pedals
- sewing machine speed control
- organ and piano pedals
Touchpad
• small touch sensitive tablets
• ‘stroke’ to move mouse pointer
• used mainly in laptop computers
• good ‘acceleration’ settings important
- fast stroke
- lots of pixels per inch moved
- initial movement to the target
- slow stroke
- less pixels per inch
- for accurate positioning
Joystick and keyboard nipple
Joystick
- indirect
pressure of stick = velocity of movement
- buttons for selection
on top or on front like a trigger
- often used for computer games
aircraft controls and 3D navigation
Keyboard nipple
- for laptop computers
- miniature joystick in the middle of the keyboard
Touch-sensitive screen
- Detect the presence of finger or stylus on the screen.
- works by interrupting matrix of light beams, capacitance changes or ultrasonic reflections
- direct pointing device
- Advantages:
- fast, and requires no specialised pointer
- good for menu selection
- suitable for use in hostile environment: clean and safe from damage.
- Disadvantages:
- finger can mark screen
- imprecise (finger is a fairly blunt instrument!)
- difficult to select small regions or perform accurate drawing
- lifting arm can be tiring