7.7. TABULAR LAYOUTS

87

none

horizontal

vertical

both

If the components do not expand horizontally and vertically, the one must spec 

ify how they should be placed inside the row or col. There are several choices,

listed below:

north northeast northwest east west

south southeast southwest center

So, we can modify the running example and have the labels in the row stay the

same size, and be centered in the row, as follows:

(define w

(window "Hello"

(row 'none 'center white

(label "red" red)

(label "green" green)

(label "yellow" yellow)

(label "blue" blue)

)))

(.pack w)

(.show w)

Note that one must precede the specifiers with a single quote. Also observe that

we can specify the color of the row   this is the color of the space between the

components in the row.

One can also lay components out in a tabular form with R rows and C

columns. There are two procedures for doing this:

(grid

R C ....)

(table R C ....)

The difference between them is that each of the cells in the grid is exactly the

same size, where as in the table the cells may vary in size. Continuing with our

example, we can make a table of four labels as follows:

(define w

(window "Hello"

(table 2 2

(label "red" red)

(label "green" green)

(label "yellow" yellow)

(label "blue" blue)

)))

(.pack w)

(.show w)