Automatic horizontal and vertical boxes

When using layout tags in a GRID container, the fglform compiler will automatically add hbox or vbox containers with splitter in the following conditions:

An hbox is created when two or more stretchable elements are stacked side by side and touch each other (no space between).
A vbox is created when two or more stretchable elements are stacked vertically and touch each other (no space between).

Stretchable elements are containers such as TABLE containers, or form items like TEXTEDIT fields with STRETCH attribute.

Note that no hbox or vbox will be created if the elements are in a SCROLLGRID container.

The next example defines two tables stacked vertically, generating a vbox with splitter (note that ending tags are omitted):

<T table1         >
[colA  |colB      ]
[colA  |colB      ]
[colA  |colB      ]
[colA  |colB      ]
<T table2         >
[colC  |colD      ]
[colC  |colD      ]

The example below defines a layout with two stretchable TEXTEDIT fields, placed side by side which would generate an automatic hbox with splitter. To make both widgets touch, you need to use a pipe delimiter in between:

[textedit1         |textedit2                ]
[                  |                         ]
[                  |                         ]
[                  |                         ]