Chapter 3

Controls

3-1

Figure 3-1

Tapping a button initiates an action

3-2

 

Figure 3-2

A text button’s name states what the

 

 

 

button does

 

 

3-2

 

 

 

 

 

Figure 3-3

Leave standard margins between a button’s name and

 

its borders

 

 

3-3

 

 

 

 

 

Figure 3-4

Name buttons distinctively wherever possible

3-5

Figure 3-5

Where to use a button named Cancel

3-6

 

Figure 3-6

A Stop button lets a user halt an operation

3-6

Figure 3-7

A picture button depicts what the button does

3-7

Figure 3-8

Where to use borders with small, self-bordered

 

picture buttons

3-8

 

 

 

 

 

Figure 3-9

Tapping a button highlights it

3-9

 

 

Figure 3-10

A button disappears when it isn’t available

 

3-10

Figure 3-11

Where to put buttons in a view

3-12

 

 

Figure 3-12

Group buttons by function

3-12

 

 

 

Figure 3-13

Regular spacing between buttons on a

 

 

 

MessagePad

 

3-13

 

 

 

 

 

Figure 3-14

A Close box compared to a large Close box

3-14

Figure 3-15

Where to use a regular Close box

3-15

 

Figure 3-16

Where to use a large Close box

3-16

 

 

Figure 3-17

Only one radio button in a cluster can

 

 

 

be selected

 

 

3-17

 

 

 

 

 

Figure 3-18

Each checkbox can be on or off

3-19

 

 

Figure 3-19

One checkbox vs. two radio buttons

3-20

 

Figure 3-20

A slider used for data input

3-21

 

 

 

Figure 3-21

Providing feedback for small, transparent

 

 

 

hot spots

 

3-22

 

 

 

 

 

Figure 3-22

How the Analog Clock button works

3-23

 

Figure 3-23

Where an Info button goes

3-24

 

 

 

Figure 3-24

Where a Recognizer button goes

3-24

 

Figure 3-25

The Recognizer button indicates the type of

 

 

recognition in effect

3-24

 

 

 

 

Figure 3-26

Where a Keyboard buttons goes

3-25

 

 

Figure 3-27

Where a New button goes

3-26

 

 

 

Figure 3-28

Where a Show button goes

3-26

 

 

Figure 3-29

Where a Filing button goes

3-27

 

 

 

Figure 3-30

A Filing button reports where a data item

 

 

 

is stored

3-28

 

 

 

 

 

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Page 15
Image 15
Apple 2 manual Controls

2 specifications

The Apple II is a defining product in the history of personal computing, first introduced in 1977 by Apple Computer, Inc. Designed by Steve Wozniak, the Apple II was one of the first highly successful mass-produced microcomputer products and played a significant role in bringing personal computers into homes and schools.

One of the Apple II's standout features was its color graphics capability. It was one of the first personal computers to provide color output, thanks to its built-in video interface. The initial model supported a resolution of 280x192 pixels with a palette of 6 colors, which allowed for vibrant visuals that set it apart from contemporaries like the monochrome Altair 8800.

The Apple II was notable for its open architecture. This design allowed users to expand the computer's capabilities easily through a series of expansion slots. Users could add floppy disk drives, additional memory, and various peripheral devices, making the system highly adaptable to individual needs. This encouraged a thriving ecosystem of third-party hardware and software, which contributed to its popularity.

Another significant feature was its use of the 6502 microprocessor. This 8-bit CPU was not only affordable but also powerful for its time, allowing the Apple II to run various applications efficiently. Along with a built-in keyboard and an innovative plastic case that housed its components, the design was user-friendly and appealing.

The Apple II also introduced the concept of “bootable software” through the use of floppy disks. The disk operating system (DOS) allowed users to store and run multiple programs without having to reload software manually, providing a level of convenience that had not been widely available before. Key software like VisiCalc, the first spreadsheet program, helped boost sales, showcasing the Apple II's utility in business and education environments.

The computer was also well-known for its early adoption of BASIC programming language. Apple provided an operating system that supported Applesoft BASIC, which enabled users, including students, to write their programs, further fostering a community of developers.

In summary, the Apple II's color graphics, open architecture, powerful 6502 processor, innovative use of floppy disks, and support for BASIC programming made it a revolutionary product in its time. Its legacy laid the groundwork for future personal computers and established Apple as a leader in the burgeoning tech industry. The Apple II remains an iconic symbol of the early personal computing era, reflecting a generation's transition into a digitally connected world.