<splitter>

Abstract instantiable class

The class of splitter gadgets. Splitters are subclasses of both <gadget> and <layout>. Splitters (sometimes referred to as split bars in Microsoft documentation) are gadgets that allow you to split a pane into two resizable portions. For example, you could create a splitter that would allow more than one view of a single document. In a word processor, this may be used to let the user edit disparate pages on screen at the same time.

A splitter consists of two components: a button that is used to create the splitter component itself (referred to as a split box), and the splitter component (referred to as the split bar). The split box is typically placed adjacent to the scroll bar. When the user clicks on the split box, a movable line is displayed in the associated pane which, when clicked, creates the split bar.

The split-box-callback: init-keyword is an instance of type false-or(<function>), and specifies the callback that is invoked when the split box is clicked.

The split-bar-moved-callback: init-keyword is an instance of type false-or<function>), and specifies a callback that is invoked when the user moves the split bar.

The horizontal-split-box?: init-keyword is an instance of type <boolean>, and if true a horizontal split bar is created.

The vertical-split-box?: init-keyword is an instance of type <boolean>, and if true a vertical split bar is created.

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Functional Developer Library Reference: DUIM - 3 Dec 1998