Apple Newton Utilities Uživatelská příručka stáhnout pdf (Strana 240)

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101

CHAPTER 6

Pickers, Pop-up Views, and Overviews

6-40 Specifying the List of Items for a Popup

Note

Picker items can include 1.x bitmaps but not 2.0 shapes. ◆

When a cell is highlighted in a two-dimensional picker item, only the part of the

cell inside the cell frame lines is inverted. You can vary the highlighting effect by

changing the values of the

cellFrame and outerFrame slots, which control

how much unhighlighted space to leave for the cell frame lines. An example of how

these values affect cell highlighting is shown in Figure 6-48.

Figure 6-48 Cell highlighting example for protoPicker

cellFrame

Optional. The width of the separator line between cells, used

for highlighting purposes. If you don’t specify this slot, the

default is 1 pixel.

outerFrame

Optional. The width of the border line around the cells, used

for highlighting purposes. If you don’t specify this slot, the

default is 2 pixels.

mask

Optional. A binary object representing the bits for a bitmap

mask. This mask is used to restrict highlighting, or for special

hit-testing. The mask must be exactly the same size as the

bitmap. Cells in the grid are highlighted only if the position

tapped is “black” in the mask.

Table 6-3 Item frame for two-dimensional grid (continued)

Slot Name Description

cellFrame=1

outerFrame=2

cellFrame=3

outerFrame=3

cellFrame=0

outerFrame=0

1 2 ... 235 236 237 238 239 240 241 242 243 244 245 ... 941 942

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