Scrollbar

Description

A scrollbar with a draggable scroll indicator and stepper buttons to move the indicator.

The scrollbar control has a horizontal orientation if the width is greater than the height at creation time, or vertical if its height is greater than its width. Calls the?onChange()?callback after the position of the indicator is changed or if its?notify()?method is called. Calls the?onChanging()?callback repeatedly while the user is moving the indicator. Scrollbars are often created with an associated?EditText?field to display the current value of the scrollbar, and to allow setting the scrollbar’s position to a specific value.

Properties

active readonly	True if this element is active.
alignment readonly	The alignment style for this element. If defined, this value overrides the alignChildren setting for the parent container.
bounds readonly	The boundaries of the element, in parent-relative coordinates.
children readonly	An array of child elements.
enabled readonly	True if this element is enabled.
graphics readonly	The graphics object that can be used to customize the element’s appearance, in response to the?onDraw()?event.
helpTip readonly	The help text that is displayed when the mouse hovers over the element.
indent readonly	The number of pixels to indent the element during automatic layout.
jumpdelta readonly	The amount to increment or decrement a scrollbar indicator’s position when the user clicks ahead or behind the moveable element.
location readonly	The upper left corner of this element relative to its parent.
maximumSize readonly	The maximum height and width to which the element can be resized.
maxvalue readonly	The maximum value allowed in the value property.
minimumSize readonly	The minimum height and width to which the element can be resized.
minvalue readonly	The minimum value allowed in the value property.
parent readonly	The parent element.
preferredSize readonly	The preferred size, used by layout managers to determine the best size for each element.
properties readonly	An object that contains one or more creation properties of the container (properties used only when the element is created).
shortcutKey readonly	The key sequence that invokes the ?onShortcutKey()?callback for this element (in Windows only).
size readonly	The current dimensions of this element.
stepdelta readonly	The amount by which to increment or decrement a scrollbar element’s position when the user clicks a stepper button.
type readonly	The element type, “scrollbar”.
value readonly	The current position of the indicator.
visible readonly	True if this element is shown, false if it is hidden.
window readonly	The window that this element belongs to.
windowBounds readonly	The bounds of this element relative to the top-level parent window.

Methods

addEventListener readonly	Registers an event handler for a particular type of event occuring in this element.
dispatchEvent readonly	Simulates the occurrence of an event in this target.
hide readonly	Hides this element.
notify readonly	Sends a notification message, simulating the specified user interaction event.
removeEventListener readonly	Unregisters an event handler for a particular type of event occuring in this element.
show readonly	Shows this element.

Events

onActivate readonly	An event-handler callback function, called when the element acquires the keyboard focus.
onChange readonly	An event-handler callback function, called when the user has finished dragging the position indicator, or has clicked the control.
onChanging readonly	An event-handler callback function, called when the content of the element is in the process of changing
onDeactivate readonly	An event-handler callback function, called when the element loses the keyboard focus.
onDraw readonly	An event-handler callback function, called when the window is about to be drawn.
onShortcutKey readonly	An event-handler callback function, called when the element’s?shortcutKey?sequence is typed in the active window.