layout constraint - shannah/CodeRAD GitHub Wiki
An attribute that specifies the layout constraint that is used to add the tag to its parent container. This attribute can be used on any component, and it required when adding components to certain containers - namely <border> and <borderAbsolute>. For some containers (e.g. <layered> it is optional).
The syntax of the layout constraint will depend on the type of layout that is used by the parent container.
When adding components to a container that uses BorderLayout, (e.g. <border>), you must includes a layout-constraint attribute to specify where, in the container, the component should appear. Possible values include north, south, east, west, center, or java:* for some java expression resolving to a valid BorderLayout constraint. E.g. java:BorderLayout.NORTH.
<border>
<button layout-constraint="north">North button</button>
<button layout-constraint="south">South button</button>
<button layout-constraint="east">East button</button>
<button layout-constraint="west">West button</button>
<button layout-constraint="center">Center Button</button>
</border><?xml version="1.0"?>
<border xsi:noNamespaceSchemaLocation="BorderLayoutSample.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<title>BorderLayout Sample</title>
<button layout-constraint="north">North button</button>
<button layout-constraint="south">South button</button>
<button layout-constraint="east">East button</button>
<button layout-constraint="west">West button</button>
<button layout-constraint="center">Center Button</button>
</border>