Apple Newton Utilities Guia do Utilizador descarregar pdf (Página 323)

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CHAPTER 8

Text and Ink Input and Display

Using Text 8-31

The Key Deﬁnitions Array 8

Each keyboard view contains a key deﬁnitions array, which determines the layout

of the individual keys in the keyboard. The key deﬁnitions array is an array of rows.

Each row is an array of values that looks like this:

row0 := [ rowHeight, rowMaxKeyHeight,

key0Legend, key0result, key0Descriptor,

key1Legend, key1result, key1Descriptor,

key2Legend, key2result, key2Descriptor,

...

]

The ﬁrst two elements describe the height to allot for the row (rowHeight) and the

height of the tallest key in the row (

rowMaxKeyHeight), in key units. These two

measurements are often the same, but they may differ. Key units are described in

“Key Dimensions” (page 8-35).

Next in the row array is a series of three elements for each key in the row:

■ keyLegend

■ keyResult

■ keyDescriptor

These values are described in the following sections.

Figure 8-13 shows the example keyboard view that is used to explain key deﬁnition

in this section.

Figure 8-13 A generic keyboard view

The following is the view deﬁnition of the keyboard shown in Figure 8-13. The

values in the row arrays are explained in the remainder of this section.

row0 := [ keyVUnit, keyVUnit,

"1",1, keyHUnit+keyVUnit+keyFramed+2*keyInsetUnit+keyAutoHilite,

"2",2, keyHUnit+keyVUnit+keyFramed+2*keyInsetUnit+keyAutoHilite

"3",3, keyHUnit+keyVUnit+keyFramed+2*keyInsetUnit+keyAutoHilite ];

1 2 ... 318 319 320 321 322 323 324 325 326 327 328 ... 941 942

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