Volume 6A: Motif Programming Manual

XmNleftAttachment set to XmATTACH_OPPOSITE_FORM with negative offset

9.4.3 Position Attachments

Form positions provide another way to position widgets within a Form. The concept is similar to the hook and rod

principle described earlier, but in this case the widgets are anchored on at positions that are based on imaginary

longitude and latitude lines that are used to segment the Form into equal pieces. The resource used to partition the

Form into segments is XmNfractionBase. Although the name of this resource may suggest complicated

calculations, you just need to know that the Form is divided horizontally and vertically into the number of partitions

represented by its value. For example, the figure shows how a Form is partitioned if XmNfractionBase is set to 5.

9 Manager Widgets 9.4.3 Position Attachments

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Form with XmNfractionBase set to 5

As you can see, there are an equal number of horizontal and vertical partitions, but the size of the horizontal partitions

is not the same as the size of the vertical partitions. It is currently not possible to set the number of horizontal

partitions separately from the number of vertical ones, although it is possible to work around this shortcoming, as we

will describe shortly.

Widgets are placed at the coordinates that represent the partitions by specifying ...