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CHAPTER 4: User-Interface Tools LayoutManager object 165

}

function drawButton (drawingState) {

...

}

LayoutManager object

Controls the automatic layout behavior for a window or container. The subclass AutoLayoutManager

implements the default automatic layout behavior.

AutoLayoutManager object constructor

Create an instance of the AutoLayoutManager class with the new operator:

myWin.layout = new AutoLayoutManager(myWin);

An instance is automatically created when you create a Window or container (group or panel) object, and

referenced by the container’s layout

property. This instance implements the default layout behavior unless

you override it.

AutoLayoutManager object properties

The default object has no predefined properties, but a script can assign arbitrary properties to an object it

creates, to store data needed by the script-defined layout algorithm.

AutoLayoutManager object functions

layout()

windowObj.layout.layout (recalculate)

recalculate

Optional. When true, forces the layout manager to recalculate the container size for

this and any child containers. Default is false.

Invokes the automatic layout behavior for the managed container. Adjusts sizes and positions of the

child elements of this window or container according to the placement and alignment property

values in the parent and children.

Invoked automatically the first time the window is displayed. Thereafter, the script must invoke it

explicitly to change the layout in case of changes in the size or position of the parent or children.

Returns

undefined

resize()

windowObj.layout.resize ()

Resizes and moves the child elements of the managed container, according to the alignment values

for each child of the container, after the container has been resized by the user or by a script.

See “

Automatic layout” on page 86 for details of how alignment affects an element’s size and

location.

Returns

undefined.

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