7.3 DUIM-Layouts Module

<stack-layout>

Open abstract instantiable class

Summary

The class of stack layouts.

Superclasses

<layout>

Init-keywords

border:: An instance of type <integer>. Default value: 0.
mapped-page:: An instance of <sheet>.

Library

duim-layouts

Module

duim-layouts

Description

The class of stack layouts. Stack layouts position all of their children at the top-left one on top of the other. The layout sizes itself to be large enough to fit the largest child. They are primarily useful for creating layouts that simulate sets of several pages where only one child is visible at a time, and all the others are withdrawn, and are used to control the layout of elements such as tab controls or wizard frames. To make a new page appear, you withdraw the current page, and then map the new page. The new page is automatically the correct size and in the correct position.

The border: init-keyword provides a border of whitespace around the children in the layout, and the value of this init-keyword represents the size of the border in pixels. This basically has the same effect as using the macro with-spacing around the layout, except it uses a simpler syntax.

The mapped-page: init-keyword allows you to assign a page to be mapped onto the screen when a stack layout is first created. If it is not specified, then the first page in the stack layout is mapped.

Operations

None.