ValueButton

ValueButton

new ValueButton(optionsopt)

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Properties:
Name Type Attributes Default Description
options.value Number <optional>
 0

The value of the widget.
options.direction String <optional>
 "polar"

Direction for changing the value. Can be "polar", "vertical" or "horizontal". See DragValue for more details.
options.blind_angle Number <optional>
 20

If options.direction is "polar", this is the angle of separation between positive and negative value changes. See DragValue for more details.
options.rotation Number <optional>
 45

Defines the angle of the center of the positive value changes. 0 means straight upward. For instance, a value of 45 leads to increasing value when moving towards top and right. See DragValue for more details.
options.snap Number <optional>
 0.01

Snap value while dragging.
options.basis Number <optional>
 300

Distance to drag between min and max in pixels.

This widget combines a Button, a Scale and a Value. ValueButton uses DragValue and ScrollValue for setting its value. It inherits all options of DragValue and Scale.

Parameters:
Name Type Attributes Default Description
options Object <optional>
 { }

An object containing initial options.

Extends

Members

drag :DragValue

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The DragValue module.

Type:

element :HTMLDivElement

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The main DIV container. Has class .aux-valuebutton.

Type:
  • HTMLDivElement

icon :Icon

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The Icon widget.

Type:

label :Label

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The Label of the button.

Type:

scale :Scale

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The Scale showing the value.

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scroll :ScrollValue

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The ScrollValue module.

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value :Value

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The value widget for editing the value manually.

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Methods

addChild(child)

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Registers a widget as a child widget. This method is used to build up the widget tree. It does not modify the DOM tree.

Parameters:
Name Type Description
child Widget

The child to add.
Fires:
  • Widget#event:child_added

addChildren(a)

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Registers an array of widgets as children.

Parameters:
Name Type Description
a Array.<Widget>

An array of Widgets.

allChildren()

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Returns an array of all children.

appendChild(child)

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Appends child.element to the widget element and registers child as a child widget.

Parameters:
Name Type Description
child Widget

The child widget to append.

appendChildren(children)

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Calls Widget#appendChild for an array of widgets.

Parameters:
Name Type Description
children Array.<Widget>

The child widgets to append.

disableTansitions()

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Disable CSS transitions.

enableDraw()

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Schedules this widget for drawing.

Fires:

enableDrawChildren()

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Enables rendering for all children of this widget.

enableTransitions()

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Enable CSS transitions.

forceHide()

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Hide the widget immediately by applying the class aux-hide. Does not call disableDraw().

forceShow()

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Show the widget immediately by applying the class aux-show. Does not call enableDraw().

getStyle()

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Returns the computed style of this widget's DOM element.

hidden()

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Returns the current hidden status.

hide()

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Hide the widget. This will result in the class aux-hide being applied to this widget in the next rendering step.

invalidate(key)

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Invalidates an option and triggers a redraw() call.

Parameters:
Name Type Description
key string

observeResize(cb)

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Calls a callback whenever the widget resizes. This method will trigger one resize.

Parameters:
Name Type Description
cb function

removeChild(child)

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Removes a child widget. Note that this method only modifies the widget tree and does not change the DOM.

Parameters:
Name Type Description
child Widget

The child to remove.
Fires:
  • Widget#event:child_removed

removeChildren(a)

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Removes an array of children.

Parameters:
Name Type Description
a Array.<Widget>

An array of Widgets.

set(key, value)

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Sets an option.

Parameters:
Name Type Description
key string

The option name.
value

The option value.

setFocus(focus)

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Sets or removes focus on the element returned by getFocusTarget.

Parameters:
Name Type Description
focus Boolean

setStyle()

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Sets a CSS style property in this widget's DOM element.

show()

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Make the widget visible. This will apply the class aux-show during the next rendering step.

toggleHidden()

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Toggle the hidden status. This is equivalent to calling hide() or show(), depending on the current hidden status of this widget.

transitionsDisabled()

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Returns true if transitions are currently disabled on this widget.

visibleChildren()

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Returns an array of all visible children.

Events

clicked

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Is fired if a delay is set, after the pointer is released and the timeout hasn't finished yet. Doesn't fire after the timeout finished.

Parameters:
Name Type Description
event Event

Either the MouseEvent or the TouchEvent.

destroy

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Is fired when a widget is destroyed.

doubleclick

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Is fired when the user doubleclicks the valuebutton in order to to reset to initial value. The Argument is the new value.

Parameters:
Name Type Description
value number

The value of the widget.

GenericDOMEvents

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Generic DOM events. Please refer to W3Schools for further details.

hide

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The hide event is emitted when a widget is hidden and is not rendered anymore. This happens both with browser visibility changes and also internally when using layout widgets such as Pager.

initialized

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Is fired when a widget is initialized.

press_cancel

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Is fired after press_start or press_delay and before a press_end was fired while the pointer is dragged outside of the button element.

Parameters:
Name Type Description
event Event

Either the MouseEvent or the TouchEvent.

press_delayed

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Is fired after either a mousedown or a touchstart happened but delay is set so firing press_start will be delayed.

press_end

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Is fired after either a mouseup or a touchend happened and the pointer didn't leave the button element after press_start or press_delayed was fired.

Parameters:
Name Type Description
event Event

Either the MouseEvent or the TouchEvent.

press_start

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Is fired after either a mousedown or a touchstart happened and delay is set to 0. If a delay is set, press_delayed is fired instead on mousedown/touchstart and this event gets fired as soon as the delay time is over.

Parameters:
Name Type Description
event Event

Either the MouseEvent or the TouchEvent.

pressed

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Is fired if delay is set and the timeout has finished.

Parameters:
Name Type Description
event Event

Either the MouseEvent or the TouchEvent.

redraw

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The redraw event is emitted when a widget is redrawn. This can be used to do additional DOM modifications to a Widget.

resize

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The resize event is emitted whenever a widget is being resized. This event can be used to e.g. measure its new size. Note that some widgets do internal adjustments after the resize event. If that is relevant, the Widget#resized event can be used instead.

resized

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The resized event is emitted after each rendering frame, which was triggered by a resize event.

set

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The set event is emitted when an option was set using the Widget#set method. The arguments are the option name and its new value.

Note that this happens both for user interaction and programmatical option changes.

show

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The show event is emitted when a widget is shown and is being rendered. This is the counterpart to Widget#hide.

useraction

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The useraction event is emitted when a widget gets modified by user interaction. The event is emitted for the option value.

Parameters:
Name Type Description
name string

The name of the option which was changed due to the users action
value mixed

The new value of the option

valueedit

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Is fired when the user starts editing the value manually

Parameters:
Name Type Description
value number

The value of the widget.

valueedit

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Is fired when the user starts editing the value manually.

Parameters:
Name Type Description
value number

The value of the widget.

valueset

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Is fired when the user finished editing the value manually

Parameters:
Name Type Description
value number

The value of the widget.

valueset

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Is fired when the user finished editing the value manually.

Parameters:
Name Type Description
value number

The value of the widget.

visibility

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Is fired when the visibility state changes. The first argument is the visibility state, which is either true or false.