Pickers, Pop-up Views, and Overviews

Specifying the List of Items for a Popup

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.

Cell highlighting example for

protoPicke

r

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.

Item frame for two-dimensional grid (continued)

cellFrame=1
outerFrame=2

cellFrame=3
outerFrame=3

cellFrame=0
outerFrame=0